[{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20251223\/2023Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAniakchak (VNUM #312090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A775\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 56 deg 54 min W 158 deg 12 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4400 ft (1341 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe Alaska Volcano Observatory (AVO) is no longer receiving data from seismic stations on Aniakchak Volcano due to an ongoing power outage at the receive facility in Port Heiden. As a result AVO unable to (1) assess whether the volcano may be building towards an eruption and (2) quickly confirm or dismiss reports of activity.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBecause this volcano is no longer seismically monitored at adequate levels, the Aviation Color Code and Volcano Alert Level are changed to UNASSIGNED\/UNASSIGNED.  As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, regional seismic, infrasound and lightning networks, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAniakchak volcano, located in the central portion of the Alaska Peninsula, consists of a stratovolcano edifice with a 6 mile (10 km) diameter summit caldera. The caldera-forming eruption occurred around 3,500 years ago. Post-caldera eruptions have produced lava domes, tuff cones, and larger spatter and scoria cone structures, including Half-Cone and Vent Mountain, all within the caldera. The most recent eruption occurred in 1931 and created a new vent and lava flows on the western caldera floor while spreading ash over much of southwestern Alaska. Aniakchak volcano is 16 miles (26 km) southeast of the nearest community, Port Heiden, and 416 miles (670 km) southwest of Anchorage, Alaska. It is located in Aniakchak National Monument and Preserve.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EJessica Larsen, Acting Coordinating Scientist, UAF \u003Ca href=\u0022mailto:jflarsen@alaska.edu\u0022\u003Ejflarsen@alaska.edu\u003C\/a\u003E (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022https:\/\/gcc02.safelinks.protection.outlook.com\/?url=http%3A%2F%2Fwww.avo.alaska.edu%2F&data=05%7C01%7Chdietterich%40usgs.gov%7C4e428a02cf274911103408db150551b8%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C638126884815330179%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=mrKsTvh8yVAs%2FbGq6tQapOq6Q773zJjI9UTvyFMD7YE%3D&reserved=0\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Status changed to Unmonitored due to seismic station outages.  ","sentUtc":"2025-12-23","obs":"avo","vName":"Aniakchak","vnum":"312090","noticeId":"DOI-USGS-AVO-2025-12-23T18:55:56+00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-12-23T18:55:56+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-12-23T18:55:56+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20251104\/2055Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A672\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ENo volcanic activity has been detected at the Atka volcanic complex since the small explosion at 21:27 AKDT on October 29, 2025 (05:27 UTC October 30, 2025). The Aviation Color Code and Alert Level are being lowered to GREEN\/NORMAL. Brief explosive events at Korovin Volcano can occur without significant precursory unrest. Fallout of ash is unlikely to extend much beyond the upper flanks of the volcano. Possible ash clouds generated by such events are expected to be small and dissipate quickly.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No further activity following small explosion last week. Aviation Color Code \/ Alert Level lowered to GREEN\/NORMAL.","sentUtc":"2025-11-04","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2025-11-04T20:03:01+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-11-04T20:03:01+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-11-04T20:03:01+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20251030\/0622Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A656\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA small explosion from Korovin Volcano was detected in seismic and infrasound data at 9:27 pm AKDT this evening, October 29, 2025 (5:27 UTC October 30, 2025).  The Aviation Color Code and Alert Level are being raised to YELLOW\/ADVISORY.  Brief explosive events at Korovin Volcano can occur without significant precursory unrest. Fallout of ash is unlikely to extend much beyond the upper flanks of the volcano. Possible ash clouds generated by such events are expected to be small and dissipate quickly.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Small explosion detected from Korovin.  ","sentUtc":"2025-10-30","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2025-10-30T05:37:49+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-10-30T05:37:49+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-10-30T05:37:49+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250910\/2023Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EOkmok (VNUM #311290)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A552\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3520 ft (1073 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EData flow from the seismic network at Okmok volcano has been restored to allow local monitoring. The Aviation Color Code is now GREEN and the Volcano Alert Level NORMAL.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EOkmok volcano is a 6-mile-wide caldera that occupies most of the eastern end of Umnak Island, located 75 miles southwest of Unalaska\/Dutch Harbor in the eastern Aleutian Islands. Okmok has had several eruptions in historic time typically consisting of ash emissions occasionally to over 30,000 feet ASL but generally much lower; lava flows crossed the caldera floor in 1945 and 1958. Prior to 2008, the volcano last erupted in February 1997 producing lava flows and intermittent ash emissions over the course of several months. The nearest settlement is Nikolski, population about 35, roughly 45 miles west of the volcano.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Local monitoring network restored. Color code \/ alert level now GREEN\/NORMAL.","sentUtc":"2025-09-10","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2025-09-10T19:08:29+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-09-10T19:08:29+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-09-10T19:08:29+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250825\/1948Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A516\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past month, signs of volcanic unrest at Shishaldin Volcano have been gradually increasing. Sulfur dioxide emissions have increased, a more vigorous vapor plume from the summit crater has been observed, and seismic and infrasound data have shown moderate increases in both the number of events and their amplitude.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThese observations represent a departure from background behavior and the\u202f\u003Cstrong\u003EAviation Color Code and Volcano Alert Level\u003C\/strong\u003E\u202fare thus being increased to\u202f\u003Cstrong\u003EYELLOW\/ADVISORY\u003C\/strong\u003E. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAn eruption is not certain, and this unrest could eventually decline over time. In the lead up to prior eruptions of Shishaldin, heat emissions were observed in satellite data as magma approached the floor of the summit crater. We have not detected elevated surface temperatures in the summit crater or observed anything else of significance, including during helicopter overflights by an AVO field crew on August 17 and 22, to indicate that magma is rising in the conduit. \u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptions at Shishaldin are sometimes preceeded by days to weeks of seismic tremor (continuous shaking of the ground) that would provide warning of a possible explosive eruption.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EGas emissions from the summit crater have at times been mistaken by observers for ash emissions under certain viewing conditions (location of the sun relative to the observer), but there is no evidence for ash deposits on the snow around the summit crater in high resolution satellite data. \u202fThe absense of ash deposits was confirmed by the close overflight observations of the summit crater made last week by an AVO field crew.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ELocal seismic and infrasound sensors, web cameras, and a geodetic network are used to monitor Shishaldin Volcano. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lightning data, and satellite data to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ci\u003ETo view information about Shishaldin Volcano\u003C\/i\u003E: \u003Ca href=\u0022https:\/\/www.avo.alaska.edu\/activity\/Shishaldin.php\u0022\u003Ehttps:\/\/www.avo.alaska.edu\/activity\/Shishaldin.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Etypically less than 1000 ft above the summit\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENo ash emissions. Plume is steam and sulfur dioxide gas. \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although activity during July\u2013November, 2023 generated ash columns that reached between 30,000 ft (9 km) and 42,000 ft (13 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Unrest has increased and the Aviation Color Code and Volcano Alert Level are being increased to YELLOW\/ADVISORY.","sentUtc":"2025-08-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2025-08-22T22:51:56+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-08-22T22:51:56+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-08-22T22:51:56+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250820\/1807Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESpurr (VNUM #313040)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A510\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 61 deg 17 min W 152 deg 15 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECook Inlet-South Central\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E11070 ft (3374 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past several months, signs of volcanic unrest at Mount Spurr\u2014including small earthquakes, gas emissions, melting ice, and surface changes\u2014have been gradually decreasing. No ground deformation has been detected since March 2025. Taken together, this means that the movement of magma toward the surface, which began in early 2024, has stopped. As a result, the chances of an eruption in the near-term are now considered extremely low.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBecause of this, the Alaska Volcano Observatory (AVO) is lowering the \u003Cstrong\u003EAviation Color Code to GREEN\u003C\/strong\u003E and the \u003Cstrong\u003EVolcano Alert Level to NORMAL\u003C\/strong\u003E, indicating that the volcano is currently quiet.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall earthquakes are still occurring more frequently than before the unrest began in February 2024, and volcanic gases are still being released from the summit crater and the Crater Peak vent on the south flank of the volcano. This is normal for volcanoes where magma has moved upward but has not erupted. Minor gas emissions and a slightly higher number of small earthquakes could persist for many months to several years. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAlthough the potential for an eruption occurring in the near-term has passed, the volcano poses hazards for recreators on Mount Spurr. High levels of carbon dioxide gas detected on the rim of Crater Peak suggest that hazardous amounts of this odorless and colorless gas may be present within the crater, but not in local communities.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Spurr volcano is an ice- and snow-covered stratovolcano located on the west side of Cook Inlet approximately 120 km (75 mi) west of Anchorage. The only known historical eruptions occurred in 1953 and 1992 from the Crater Peak flank vent located 3.5 km (2 mi) south of the summit of Mount Spurr. These eruptions were brief, explosive, and produced columns of ash that rose up to 20 km (65,000 ft) above sea level and deposited several mm of ash in south-central Alaska, including approximately 6 mm (1\/4 in) of ash on Anchorage in 1953. The last known eruption from the summit of Mount Spurr was more than 5,000 years ago. Primary hazards during future eruptions include far-traveled ash clouds, ash fall, pyroclastic flows, and lahars or mudflows that could inundate drainages all sides of the volcano, but primarily on the south and east flanks.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Acting Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Volcanic unrest has decreased over past several months. Aviation Color Code and Volcano Alert Level decreased to GREEN\/NORMAL","sentUtc":"2025-08-20","obs":"avo","vName":"Spurr","vnum":"313040","noticeId":"DOI-USGS-AVO-2025-08-19T21:03:20+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-08-19T21:03:20+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-08-19T21:03:20+00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250701\/1941Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EIliamna (VNUM #313020)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A406\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 60 deg 1 min W 153 deg 5 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECook Inlet-South Central\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E10016 ft (3053 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ERepairs to the seismic network were completed last week and there is now sufficient data available to monitor activity at Iliamna Volcano. The Aviation Color Code and Volcano Alert Level are being changed to GREEN\/NORMAL from UNASSIGNED\/UNASSIGNED. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EIliamna Volcano is located on the western side of lower Cook Inlet in the Lake Clark National Park. Iliamna is a snow-covered stratovolcano which rises 10,020 feet above sea level. Although steam plumes occur on its eastern flanks, there has been no historic volcanic activity at Iliamna. Iliamna is located 225 km (140 miles) southwest of Anchorage and 113 km (70 miles) southwest of Homer.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr\u003EJessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN\/VONA will be issued if conditions change significantly or alert levels are modified.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level changed to GREEN\/NORMAL from UNASSIGNED","sentUtc":"2025-07-01","obs":"avo","vName":"Iliamna","vnum":"313020","noticeId":"DOI-USGS-AVO-2025-07-01T19:23:31+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-07-01T19:23:31+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-07-01T19:23:31+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250505\/2000Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A289\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            No further explosive activity has been detected at the Atka volcanic complex since the small explosive event at 10:34 AKDT on April 25 (18:34 UTC on April 25). Thus, the Aviation Color Code and Alert Level are being reduced to GREEN\/NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBrief explosive events at Korovin Volcano can occur without significant precursory unrest. Fallout of ash is unlikely to extend much beyond the upper flanks of the volcano.Possible ash clouds generated by such events are expected to be small and dissipate quickly.\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No further exposlive activity observed.","sentUtc":"2025-05-05","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2025-05-05T17:00:22+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-05-05T17:00:22+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-05-05T17:00:22+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250425\/2147Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A262\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA small, short-lived explosion was detected at the Atka volcanic complex this morning at 10:34 AKDT April 25 (18:34 UTC April 25) in local infrasound and seismic data. Processing of the local infrasound data indicates the explosion originated from the summit crater of Korovin, one of several volcanoes within the Atka volcanic complex. AVO is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EHigh clouds blocked the area at the time of the explosion, preventing satellite observations. Similar past events at the Atka volcanic complex did not result in a noticeable ashfall or ash cloud or other impacts.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EJessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 378-5460\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EContact AVO: https:\/\/avo.alaska.edu\/contact\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Small explosion detected in geophysical data at 10:34 AKDT April 25.","sentUtc":"2025-04-25","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2025-04-25T20:56:24+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-04-25T20:56:24+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-04-25T20:56:24+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250303\/2352Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A142\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThere has been no further explosive activity detected at the Atka volcanic complex since the small explosive event at 4:26 UTC on February 21 (7:26 pm on 2\/20\/25 AKST). Since then, seismicity has remained low. Thus, the Aviation Color Code and Alert Level are being reduced to GREEN\/NORMAL. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFurther analysis of geophysical data confirms the source of the explosion as the summit lake region of Korovin Volcano. Satellite data from February 25, 2025 shows no evidence of hot material or ash at the surface. Our interpretation is that this was a gas-driven explosion, caused by overpressure of the subsurface cap beneath the lake. This type of singular explosion is common at Korovin Volcano. Minor amounts of ash were possibly erupted in the immediate vicinity of the summit crater but have not been confirmed. Additional explosions may occur in the near future, but are unlikely.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ELocal seismic and infrasound sensors, and web cameras are used to monitor the Atka volcanic complex. The local sensor network is supplemented with regional infrasound and lightning networks, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(639)\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/a\u003E\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(632)\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/a\u003E\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No further activity observed. Aviation Color Code and Alert Level has been changed to GREEN\/NORMAL","sentUtc":"2025-03-03","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2025-03-03T22:02:37+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-03-03T22:02:37+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-03-03T22:02:37+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250221\/2014Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A110\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThere has been no further activity detected at the Aka volcanic complex since the small explosive event from 4:26 UTC on February 21 (7:26 pm on 2\/20\/25 AKST), and seismicity remains low. Thus, the Aviation Color Code and Alert Level are being reduced to YELLOW\/ADVISORY. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFurther analysis of geophysical data confirms the source of the explosion as the summit lake region of Korovin Volcano and satellite data from last evening show no evidence of hot material at the surface. Our interpretation is that this was a steam-driven explosion, caused by overpressure of the subsurface cap beneath the lake. This type of singular explosion is common at Korovin Volcano. Minor amounts of ash were likely erupted in the immediate vicinity of the vent but have not been confirmed. Additional explosions are possible in the near future, but unlikely.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ELocal seismic and infrasound sensors, and web cameras are used to monitor the Atka volcanic complex. The local sensor network is supplemented with regional infrasound and lightning networks, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(639)\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/a\u003E\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(712)\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu (907) 378-5460\u003C\/a\u003E\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No further activity observed. Aviation Color Code and Alert Level has been changed to YELLOW\/ADVISORY","sentUtc":"2025-02-21","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2025-02-21T19:36:30+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-02-21T19:36:30+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-02-21T19:36:30+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250221\/0611Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A652\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA single, small explosive event was detected in local seismic and infrasound data at 4:26 UTC (7:26 pm AKST) at the Atka volcanic complex. As a result, the Aviation Color Code and Alert Level has been changed to ORANGE\/WATCH. The explosive event was short in duration (less than 10 seconds), and it is likely that a small amount of volcanic ash was erupted during this event. A meteorological cloud deck at an altitude of 8,000 to 10,000 ft above sea level obscured direct satellite observations, but no ash emissions were observed above the clouds. There have been no further explosive events observed and no noticeable change in seismic activity.   \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ELocal seismic and infrasound sensors and web cameras are used to monitor the Atka volcanic complex along with regional infrasound and lightning networks, and satellite data.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ELess than 10,000 ft \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENo ash seen in satellite data above met cloud deck\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast\u2013southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(639)\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/a\u003E\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(712)\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu (907) 378-5460\u003C\/a\u003E\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Small explosive event detected by local seismic and infrasound data. Aviation Color Code and Alert Level has been changed to ORANGE\/WATCH.","sentUtc":"2025-02-21","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2024-09-25T23:16:58+00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-09-25T23:16:58+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-09-25T23:16:58+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20250129\/0201Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EOkmok (VNUM #311290)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2025\/A57\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3520 ft (1073 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe Alaska Volcano Observatory (AVO) equipment that transmits real-time seismic data from stations in the Okmok volcano monitoring network has experienced significant degradation over the past several days. A few channels are still being transmitted but are not sufficient to establish that the volcano is at a typical background level. AVO estimates that the outage will likely last several weeks or longer. As a result, AVO is unable to (1) assess whether this volcano may be building towards an eruption and (2) quickly confirm or dismiss reports of activity.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBecause this volcano is no longer monitored at adequate levels, the Aviation Color Code and Volcano Alert Level are changed to UNASSIGNED\/UNASSIGNED.  As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, regional seismic, infrasound and lightning networks, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EOkmok volcano is a 6-mile-wide caldera that occupies most of the eastern end of Umnak Island, located 75 miles southwest of Unalaska\/Dutch Harbor in the eastern Aleutian Islands. Okmok has had several eruptions in historic time typically consisting of ash emissions occasionally to over 30,000 feet ASL but generally much lower; lava flows crossed the caldera floor in 1945 and 1958. Prior to 2008, the volcano last erupted in February 1997 producing lava flows and intermittent ash emissions over the course of several months. The nearest settlement is Nikolski, population about 35, roughly 45 miles west of the volcano.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr\u003E\u003Cbr\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Major network outage due to power system degradation.  ","sentUtc":"2025-01-29","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2025-01-29T01:24:15+00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-01-29T01:24:15+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-01-29T01:24:15+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20241016\/2007Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESpurr (VNUM #313040)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A675\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 61 deg 17 min W 152 deg 15 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECook Inlet-South Central\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E11070 ft (3374 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAVO has observed a gradual increase in volcanic unrest over a period of several months at Mount Spurr, located about 120 km (75 miles) west of Anchorage (https:\/\/avo.alaska.edu\/image\/view\/196123). GNSS receivers have detected sustained upward and outward ground deformation since March 2024. An increase in seismic activity has also been noted since April (https:\/\/avo.alaska.edu\/image\/view\/196122). Other indications of elevated activity include the development of a small lake in the summit crater in early summer of 2024.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe largest magnitude earthquake detected in this current period of unrest is a M2.3 earthquake on October 6th. This increase in activity was described in detail in an Information Statement (https:\/\/avo.alaska.edu\/news\/hans\/DOI-USGS-AVO-2024-10-09T19:43:26+00:00) that AVO released on October 9th. Analysis of seismic data indicates a subtle increase in the rate and size of earthquakes over the past few weeks. Because this is a notable departure from the normal background seismicity of the volcano, AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. However, there are no indications that an eruption is imminent. Often this type of seismicity and ground deformation will decline without producing an eruption.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO continues to closely monitor activity at Mount Spurr for signals that would indicate that the volcano is moving closer to an eruption. Based on previous eruptions, changes from current activity in the earthquakes, ground deformation, summit lake, and fumaroles would be expected if magma began to move closer to the surface. Therefore, it is very likely that if an eruption were to occur it would be preceded by additional signals that would allow advance warning. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Spurr volcano is an ice- and snow-covered stratovolcano located on the west side of Cook Inlet approximately 120 km (75 mi) west of Anchorage. The only known historical eruptions occurred in 1953 and 1992 from the Crater Peak flank vent located 3.5 km (2 mi) south of the summit of Mount Spurr. These eruptions were brief, explosive, and produced columns of ash that rose up to 20 km (65,000 ft) above sea level and deposited several mm of ash in south-central Alaska, including approximately 6 mm (1\/4 in) of ash on Anchorage in 1953. The last known eruption from the summit of Mount Spurr was more than 5,000 years ago. Primary hazards during future eruptions include far-traveled ash clouds, ash fall, pyroclastic flows, and lahars or mudflows that could inundate drainages all sides of the volcano, but primarily on the south and east flanks.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS \u003Ca href=\u0022mailto:mhaney@usgs.gov\u0022\u003Emhaney@usgs.gov\u003C\/a\u003E (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI \u003Ca href=\u0022mailto:dfee1@alaska.edu\u0022\u003Edfee1@alaska.edu\u003C\/a\u003E (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Volcanic unrest has gradually increased over past several months. Aviation Color Code and Volcano Alert Level raised to YELLOW\/ADVISORY.","sentUtc":"2024-10-16","obs":"avo","vName":"Spurr","vnum":"313040","noticeId":"DOI-USGS-AVO-2024-10-15T22:16:23+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-10-15T22:16:23+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-10-15T22:16:23+00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20241001\/1804Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EWrangell (VNUM #315020)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A659\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 62 deg  W 144 deg 1 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EWrangell Volcanic Field\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E14163 ft (4317 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EField crews from the Alaska Volcano Observatory (AVO) have completed work on seismic monitoring equipment at Mt. Wrangell, bringing enough local stations back online to locate small volcanic earthquakes and detect potential activity above background at the volcano. As a result, the Aviation Color Code and Volcano Alert Level for Mt. Wrangell are being changed from UNASSIGNED  to GREEN\/NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMt. Wrangell is a 4317 m (14,163 ft) high, andesitic, shield volcano with an ice-filled summit caldera, located in the Wrangell-St. Elias National Park and Preserve. Mt. Wrangell has three small post-caldera craters, named North Crater, East Crater, and Mt. Zanetti. These craters are all geothermally active, and there are frequent historical reports of steam from Mt. Wrangell. There are also several questionable reports of historical eruptive activity. Mt. Wrangell is 330 km (206 mi) northeast of Anchorage.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(639)\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/a\u003E\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Ca href=\u0022javascript:hansJs.addContactToNotice(633)\u0022\u003EDavid Fee Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/a\u003E\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"The seismic network on Mount Wrangell volcano is now functioning.","sentUtc":"2024-10-01","obs":"avo","vName":"Wrangell","vnum":"315020","noticeId":"DOI-USGS-AVO-2024-09-30T20:22:08+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-09-30T20:22:08+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-09-30T20:22:08+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240830\/1700Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A621\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past several months, signs of volcanic unrest at Shishaldin Volcano have been declining. Slightly elevated seismicity, small infrasound signals and weak gas emissions continue to be detected but there is no indication of explosive activity or the presence of lava in the crater. This level of activity is expected to persist and continue to wane as the volcano settles after the eruption that began in July 2023 and continued until November 2023. The volcano appears to have returned to a background condition and poses no immediate threat of eruptive activity. Accordingly, AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Code to NORMAL. Resumption of volcanic activity would likely be preceded by increased seismicity, infrasound, elevated temperatures, and gas emissions .\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to monitor the volcano.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although activity during July\u2013November, 2023 generated ash columns that reached between 30,000 ft (9 km) and 42,000 ft (13 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu  (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level decreased to GREEN\/NORMAL","sentUtc":"2024-08-30","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2024-08-28T21:56:56+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-08-28T21:56:56+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-08-28T21:56:56+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240708\/2054Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECleveland (VNUM #311240)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A515\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5676 ft (1730 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe Alaska Volcano Observatory is lowering the Aviation Color Code to GREEN and Volcano Alert Level to NORMAL at Mount Cleveland. Sulfur dioxide gas emissions continue to be detected on local gas monitoring sensors, however, gas emission rates are now typical to average values since local monitoring began 2 years ago. Steaming from the summit, slightly elevated surface temperatures in the summit crater, and occasional local earthquakes are still seen at Mount Cleveland, but this activity represents background behavior at this highly active Aleutian volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last eruptive activity at Mount Cleveland was a short-lived explosion during the evening (local time) of June 1, 2020. Despite the current pause, the eruptive period at Mount Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These have occurred without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Cleveland is currently monitored with a five-station real-time seismic network. Based on past events, explosive eruptions of Cleveland may occur with little or no warning. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESteam and sulfur dioxide gas emissions continue from Cleveland\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS, mhaney@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETarsilo Girona, Acting Coordinating Scientist, UAFGI, tarsilo.girona@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code\/Volcano Alert Level lowered to GREEN\/NORMAL.","sentUtc":"2024-07-08","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2024-07-08T19:53:30+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-07-08T19:53:30+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-07-08T19:53:30+00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240708\/2052Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAniakchak (VNUM #312090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A516\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 56 deg 54 min W 158 deg 12 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4400 ft (1341 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EField crews from the Alaska Volcano Observatory are performing seasonal maintenance on seismic monitoring equipment at Aniakchak Volcano. Enough local stations have been brought online to locate volcanic earthquakes and detect any potential activity above background at the volcano. As a result, the Aviation Color Code and Volcano Alert Level are being changed to GREEN\/NORMAL.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAniakchak volcano, located in the central portion of the Alaska Peninsula, consists of a stratovolcano edifice with a 6 mile (10 km) diameter summit caldera. The caldera-forming eruption occurred around 3,500 years ago. Post-caldera eruptions have produced lava domes, tuff cones, and larger spatter and scoria cone structures, including Half-Cone and Vent Mountain, all within the caldera. The most recent eruption occurred in 1931 and created a new vent and lava flows on the western caldera floor while spreading ash over much of southwestern Alaska. Aniakchak volcano is 16 miles (26 km) southeast of the nearest community, Port Heiden, and 416 miles (670 km) southwest of Anchorage, Alaska. It is located in Aniakchak National Monument and Preserve.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS, mhaney@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETarsilo Girona, Acting Coordinating Scientist, UAFGI, tarsilo.girona@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca target=\u0022_blank\u0022 href=\u0022https:\/\/gcc02.safelinks.protection.outlook.com\/?url=http%3A%2F%2Fwww.avo.alaska.edu%2F&data=05%7C01%7Chdietterich%40usgs.gov%7C4e428a02cf274911103408db150551b8%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C638126884815330179%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=mrKsTvh8yVAs%2FbGq6tQapOq6Q773zJjI9UTvyFMD7YE%3D&reserved=0\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Monitoring stations online again, Aviation Color Code and Volcano Alert Level changed to GREEN\/NORMAL.","sentUtc":"2024-07-08","obs":"avo","vName":"Aniakchak","vnum":"312090","noticeId":"DOI-USGS-AVO-2024-07-08T20:02:22+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-07-08T20:02:22+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-07-08T20:02:22+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240705\/2254Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECleveland (VNUM #311240)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A507\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5676 ft (1730 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ESulfur dioxide gas emissions were detected on local gas monitoring sensors at Mount Cleveland starting June 21 with an increase in emission rate June 24–30. Although sulfur dioxide emissions declined to background levels on July 1, moderately elevated surface temperatures and vigorous steaming at the summit of the volcano observed over the past couple of days, suggest that Cleveland is in a state of volcanic unrest prompting the Alaska Volcano Observatory to upgrade the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last eruptive activity at Mount Cleveland was a short-lived explosion during the evening (local time) of June 1, 2020. Despite the current pause, the eruptive period at Mount Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These have occurred without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Cleveland is currently monitored with a five-station real-time seismic network. Based on past events, explosive eruptions of Cleveland may occur with little or no warning. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESulfur dioxide gas emissions detected  on local gas monitoring sensors.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Sulfur dioxide emissions detected. Aviation Color Code\/Volcano Alert Level upgraded to YELLOW\/ADVISORY.","sentUtc":"2024-07-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2024-07-05T18:35:33+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-07-05T18:35:33+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-07-05T18:35:33+00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240409\/1534Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A325\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity at the Atka volcanic complex has decreased since a small explosion was detected from the summit crater of Korovin, one of several volcanoes there, on March 27 (AKDT). Although occasional small earthquakes and weak volcanic tremor continue to be observed, the current activity is at background levels. Due to this decrease in activity, the Alaska Volcano Observatory is lowering the Aviation Color Code and Volcano Alert Level to GREEN\/NORMAL.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eno cloud observed in satellite\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast–southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Activity has returned to background levels; Aviation Color Code and Alert Level have been lowered to GREEN\/NORMAL.","sentUtc":"2024-04-09","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2024-04-08T21:32:07+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-04-08T21:32:07+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-04-08T21:32:07+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240328\/0506Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAtka volcanic complex (VNUM #311160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A287\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5030 ft (1533 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA small, short-lived explosion was detected at the Atka volcanic complex this evening at 19:36 AKDT March 27 (03:36 UTC March 28), and AVO is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  The event was detected in local infrasound and seismic data and was followed by a few minutes of elevated seismic tremor. Processing of the local infrasound data indicates the explosion originated from the summit crater of Korovin, one of several volcanoes within the Atka volcanic complex. No ash emissions have been observed in satellite images.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eno cloud observed in satellite\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Atka volcanic complex forms the northern part of Atka Island, located about 16 km north of the community of Atka and 1,761 km southwest of Anchorage. The Atka volcanic complex includes a possible older caldera and several younger vents, including Korovin Volcano, Mount Kliuchef, and Sarichef Volcano. Korovin Volcano, a 1553-m-high (5030 ft) stratovolcano, has been the site of most historical volcanic activity, and has a small, roiling crater lake that occasionally produces energetic steam emissions. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged as high as 10,600 m (35,000 feet) above sea level. Mount Kliuchef is composed of a series of five vents aligned northeast–southwest. The two main summit vents of Kliuchef appear relatively young and the easternmost was probably the source of an 1812 eruption that is sometimes attributed to Sarichef.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Raised Aviation Color Code and Alert Level to YELLOW\/ADVISORY due to small explosion. No ash observed.","sentUtc":"2024-03-28","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2024-03-28T04:57:02+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-03-28T04:57:02+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-03-28T04:57:02+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240305\/2050Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGareloi (VNUM #311070)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A241\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 47 min W 178 deg 47 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5161 ft (1573 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity at Mount Gareloi (Gareloi volcano) has decreased over the past few weeks.  Occasional small earthquakes continue to be observed; however, the current activity is at background levels. Due to this decrease in activity, the Alaska Volcano Observatory is lowering the Aviation Color Code and Volcano Alert Level to GREEN\/NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Gareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Gareloi, which makes up all of Gareloi Island, is a stratovolcano located in the Delarof Islands group of the Aleutian Islands, about 2,000 km (1,242 mi) west-southwest of Anchorage and about 150 km (93 mi) west of Adak, the westernmost community in Alaska. This small volcano is 10 × 8 km (6.2 × 5.0 mi) in diameter at its base with two summits, separated by a narrow saddle. The northern, slightly higher peak contains crater about 300 m (1,000 ft) across. The southern summit has a crater open to the south and a persistent degassing vent (fumarole) on its western rim. Gareloi has been one of the most active in the Aleutians since the 1740s, with 16 reports of eruptive activity at Gareloi since 1760. In 1929, its largest historical eruption produced sixteen small south- to southeast-trending craters that extend from the southern summit to the coast, as well as lava flows and pyroclastic deposits on the southeastern flank of the volcano. Eruptions of Gareloi commonly produce ash clouds and lava flows, and the primary hazard is airborne clouds of ash that could affect aircraft. Since seismic instruments were installed in 2003, they have detected small but consistent seismic signals from beneath Mount Gareloi’s edifice.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismic activity decreased. Aviation Color Code and Volcano Alert Level lowered to GREEN\/NORMAL","sentUtc":"2024-03-05","obs":"avo","vName":"Gareloi","vnum":"311070","noticeId":"DOI-USGS-AVO-2024-03-05T00:01:27+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-03-05T00:01:27+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-03-05T00:01:27+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240227\/2010Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EKanaga (VNUM #311110)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A217\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min W 177 deg 9 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4288 ft (1307 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic unrest at Kanaga Volcano has subsided over the past several weeks and the Aviation Color Code is being decreased to GREEN and the Volcano Alert Level to NORMAL. Seismicity, which was elevated following a small explosion and ground-cracking event on December 18, 2023, has decreased to background levels. Satellite data show that there have been no recent surface changes, elevated temperatures, or gas emissions. When atmospheric conditions are favorable, web camera and satellite data show intermittent steaming from the crack near the summit crater.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ELocal seismic and infrasound sensors and web cameras are used to monitor Kanaga. AVO also uses regional infrasound and lightning networks and a variety of satellite data.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKanaga Volcano occupies the northern corner of Kanaga Island, one of the most southerly members of the central Aleutian chain. It is a symmetric composite cone 4288 ft (1307 m) high and 3 miles (4.8 km) in diameter at sea level, built of interbedded basaltic and andesitic lava flows, scoria layers, and pyroclastic rocks. Kanaga Volcano’s last significant eruption was in 1994–1995. At least two significant ash plumes were recorded over the course of this eruption: the first, to ~25,000 ft (7.5 km), occurred on February 21, 1995 and the second on August 18, 1995, when an eruption cloud reached ~15,000 ft. (4.5 km). A light dusting of ash fell on the community of Adak and air traffic was disrupted due to continuing low-level activity and cloudy conditions which prevented visual approaches to the Adak airfield.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EHannah Dietterich, Acting Scientist-in-Charge, USGS hdietterich@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Unrest has subsided and the Aviation Color Code and Volcano Alert Level are being decreased.","sentUtc":"2024-02-27","obs":"avo","vName":"Kanaga","vnum":"311110","noticeId":"DOI-USGS-AVO-2024-02-27T19:02:48+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-02-27T19:02:48+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-02-27T19:02:48+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240217\/2026Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A176\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is not showing any signs of ongoing ash emissions or eruptive activity. Seismicity remains elevated with ongoing volcanic earthquakes, but there is no indication of explosive activity or the presence of lava in the crater. The current activity is consistent with continued volcanic unrest but not an active eruption, and AVO is lowering the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last significant eruptive activity was in November 2023.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to monitor the volcano.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level decreased to YELLOW\/ADVISORY","sentUtc":"2024-02-17","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2024-02-16T21:16:48+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-02-16T21:16:48+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-02-16T21:16:48+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240212\/2210Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGareloi (VNUM #311070)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A158\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 47 min W 178 deg 47 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5161 ft (1573 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past several hours, AVO has detected an increase in seismicity at Mount Gareloi (Gareloi volcano) beginning at 09:15 AKST (18:15 UTC). The current activity marks a change in character above background rates, and AVO is raising the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThere have been no other notable changes at the volcano in satellite data or webcam views. Mount Gareloi persistently emits magmatic gases from a fumarole field on the south crater and commonly exhibits low-level seismic activity. These observations suggest the presence of shallow magma and potential interaction with a hydrothermal system. The current increase in seismicity likely reflects a change to the magmatic-hydrothermal system, but it is not clear that the likelihood of a volcanic eruption has increased. AVO will continue to monitor activity to determine if the recent changes are related to influx of new magma or other changes to the magma system.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Gareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Gareloi, which makes up all of Gareloi Island, is a stratovolcano located in the Delarof Islands group of the Aleutian Islands, about 2,000 km (1,242 mi) west-southwest of Anchorage and about 150 km (93 mi) west of Adak, the westernmost community in Alaska. This small volcano is 10 × 8 km (6.2 × 5.0 mi) in diameter at its base with two summits, separated by a narrow saddle. The northern, slightly higher peak contains crater about 300 m (1,000 ft) across. The southern summit has a crater open to the south and a persistent degassing vent (fumarole) on its western rim. Gareloi has been one of the most active in the Aleutians since the 1740s, with 16 reports of eruptive activity at Gareloi since 1760. In 1929, its largest historical eruption produced sixteen small south- to southeast-trending craters that extend from the southern summit to the coast, as well as lava flows and pyroclastic deposits on the southeastern flank of the volcano. Eruptions of Gareloi commonly produce ash clouds and lava flows, and the primary hazard is airborne clouds of ash that could affect aircraft. Since seismic instruments were installed in 2003, they have detected small but consistent seismic signals from beneath Mount Gareloi’s edifice.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Increase in seismic activity. Aviation Color Code and Volcano Alert Level raised to YELLOW\/ADVISORY","sentUtc":"2024-02-12","obs":"avo","vName":"Gareloi","vnum":"311070","noticeId":"DOI-USGS-AVO-2024-02-12T21:48:20+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-02-12T21:48:20+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-02-12T21:48:20+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240211\/2146Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A152\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity at Shishaldin Volcano has increased slightly, and minor ash emissions were observed in a web camera image from 18:25 UTC (9:25 AM) this morning. The ash in the web camera image extends from the summit crater and drapes down over the volcano's north flank. This ash emission episode corresponds with seismic signals typically associated with surficial mass flows. The low-level ash cloud may result from a non-eruptive collapse of previously emplaced ash and pyroclastic debris on the upper part of the Shishaldin cone.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EClouds have obscured summit views in web camera images after the 18:25 UTC image. No ash clouds have been observed in satellite imagery. Thus, the Aviation Color Code and the Volcano Alert Level are being raised to ORANGE\/WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAt summit (9375 ft)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EEvident in ony 1 web cam image from 18:25 UTC\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level increased to Orange due to minor ash emissions.","sentUtc":"2024-02-11","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2024-02-11T21:12:44+00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-02-11T21:12:44+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-02-11T21:12:44+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240110\/2004Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETrident (VNUM #312160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A38\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 58 deg 14 min W 155 deg 6 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3599 ft (1097 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity beneath Trident Volcano has decreased over the past month.  Occasional small earthquakes continue to be observed; however, the current activity is at background levels.  No evidence of ground deformation has been observed since the end of November 2023.  Due to this decrease in activity, the Alaska Volcano Observatory is lowering the Aviation Color Code and Volcano Alert Level to GREEN\/NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO monitors Trident with a local network of seismometers, a webcam, remote sensing data, and regional infrasound and lightning networks. To view current monitoring data, see \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Trident.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Trident.php\u003C\/a\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrident Volcano is one of the Katmai group of volcanoes located within Katmai National Park and Preserve on the Alaska Peninsula. Trident consists of a complex of four cones and numerous lava domes, all andesite and dacite in composition, that reach as high as 6,115 ft above sea level. An eruption beginning in 1953 constructed the newest cone, Southwest Trident, and four lava flows on the flank of the older complex. This eruption continued through 1974 and produced ash (an initial plume rose to 30,000 ft asl), bombs, and lava at various times. Fumaroles remain active on the summit of Southwest Trident and on the southeast flank of the oldest, central cone. Trident is located 148 km (92 miles) southeast of King Salmon and 440 km (273 miles) southwest of Anchorage.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS awech@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity beneath Trident Volcano has decreased; Aviation Color Code and Volcano Alert Level lowered to GREEN\/NORMAL","sentUtc":"2024-01-10","obs":"avo","vName":"Trident","vnum":"312160","noticeId":"DOI-USGS-AVO-2024-01-10T09:56:45-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-01-10T09:56:45-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-01-10T09:56:45-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20240102\/2033Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2024\/A5\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity at Shishaldin Volcano has gradually declined over the past two months since the last significant explosive event on November 3, 2023. Small explosions within the summit crater continue to be detected in infrasound data during periods of quiet (low wind) conditions but new deposits have not recently been seen inside or outside the crater. Satellite-observed surface temperatures remain low, suggesting lava is not present in the crater. The current activity is consistent with continued volcanic unrest but not an active eruption. Thus, the Aviation Color Code and the Volcano Alert Level are being decreased to YELLOW\/ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eintermittent steaming continues\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS djschneider@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level lowered due to decreased activity. ","sentUtc":"2024-01-02","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2024-01-02T10:41:08-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2024-01-02T10:41:08-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2024-01-02T10:41:08-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231219\/2101Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EKanaga (VNUM #311110)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1742\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min W 177 deg 9 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4288 ft (1307 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA small explosion was detected at Kanaga Volcano overnight at 22:31 AKST Dec 18 (07:31 UTC Dec. 19), and AVO is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  The event was detected in local infrasound and seismic data and was followed by elevated earthquake seismicity that is ongoing.  No ash emisions have been observed in partly cloudy satellite images.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Small explosion followed by seismic unrest","sentUtc":"2023-12-19","obs":"avo","vName":"Kanaga","vnum":"311110","noticeId":"DOI-USGS-AVO-2023-12-19T11:32:50-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-12-19T11:32:50-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-12-19T11:32:50-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231124\/1912Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EBogoslof (VNUM #311300)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1661\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E492 ft (150 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EFollowing the seismic swarm that began at Bogoslof around October 22, 2023 the frequency of earthquakes has now subsided to background levels. During the swarm 5 to 10 events per hour and up to a total of ~1,100 earthquakes were recorded in one week. The decline in seismicity has been observed over the past 3 weeks, with the last moderate earthquake (M2.7) recorded on November 9. No other signs of volcanic unrest have been detected. In response, AVO is lowering the Aviation Color Code and Volcano Alert Level to UNASSIGNED. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBogoslof volcano is monitored using a single local seismic station, distant seismic and infrasound instruments, satellite data, and lightning networks.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E\u003C!--[if gte vml 1]\u003E\u003Cv:shapetype id=\u0022_x0000_t75\u0022\u003Cbr \/\u003E\r\n coordsize=\u002221600,21600\u0022 o:spt=\u002275\u0022 o:preferrelative=\u0022t\u0022 path=\u0022m@4@5l@4@11@9@11@9@5xe\u0022\u003Cbr \/\u003E\r\n filled=\u0022f\u0022 stroked=\u0022f\u0022\u003E\u003Cbr \/\u003E\r\n \u003Cv:stroke joinstyle=\u0022miter\u0022\/\u003E\u003Cbr \/\u003E\r\n \u003Cv:formulas\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022if lineDrawn pixelLineWidth 0\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022sum @0 1 0\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022sum 0 0 @1\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022prod @2 1 2\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022prod @3 21600 pixelWidth\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022prod @3 21600 pixelHeight\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022sum @0 0 1\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022prod @6 1 2\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022prod @7 21600 pixelWidth\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022sum @8 21600 0\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022prod @7 21600 pixelHeight\u0022\/\u003E\u003Cbr \/\u003E\r\n  \u003Cv:f eqn=\u0022sum @10 21600 0\u0022\/\u003E\u003Cbr \/\u003E\r\n \u003C\/v:formulas\u003E\u003Cbr \/\u003E\r\n \u003Cv:path o:extrusionok=\u0022f\u0022 gradientshapeok=\u0022t\u0022 o:connecttype=\u0022rect\u0022\/\u003E\u003Cbr \/\u003E\r\n \u003Co:lock v:ext=\u0022edit\u0022 aspectratio=\u0022t\u0022\/\u003E\u003Cbr \/\u003E\r\n\u003C\/v:shapetype\u003E\u003Cv:shape id=\u0022Picture_x0020_1\u0022 o:spid=\u0022_x0000_i1025\u0022 type=\u0022#_x0000_t75\u0022\u003Cbr \/\u003E\r\n alt=\u0022Image\u0022 style='width:468pt;height:265.2pt;visibility:visible;\u003Cbr \/\u003E\r\n mso-wrap-style:square'\u003E\u003Cbr \/\u003E\r\n \u003Cv:imagedata src=\u0022file:\/\/\/C:\/Users\/kwallace\/AppData\/Local\/Temp\/1\/msohtmlclip1\/01\/clip_image001.png\u0022\u003Cbr \/\u003E\r\n  o:title=\u0022Image\u0022\/\u003E\u003Cbr \/\u003E\r\n\u003C\/v:shape\u003E\u003C![endif]--\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAt least nine historical eruptions have been documented at Bogoslof volcano. The most recent occurred from December 2016 to August 2017 and produced seventy main explosive events that generated volcanic ash clouds that rose as high as 42,500 ft (13 km) above sea level, and greatly modified the topography of Bogoslof Island.  Previous eruptions of the volcano have lasted weeks to months and have on occasion produced ash fall on the community of Unalaska. Eruptions of the volcano are often characterized by multiple explosive ash-producing events as well as the growth of lava domes.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBogoslof Island is the largest of a cluster of small, low-lying islands making up the summit of a large submarine stratovolcano. The highest point above sea level is about 490 ft (150 m); however, the volcano is frequently altered by both eruptions and wave erosion and has undergone dramatic changes in historical time. The two main islands currently above sea level are Fire Island and Bogoslof Island, both located about 61 miles (98 km) northwest of Unalaska\/Dutch Harbor, 76 miles (123 km) northeast of Nikolski, and 93 miles (149 km) northeast of Akutan. The volcano is situated slightly north (behind) the main Aleutian volcanic front. Bogoslof volcano is within the U.S. Fish and Wildlife Service Alaska Maritime National Wildlife Refuge and is habitat for marine mammals and seabirds (https:\/\/www.fws.gov\/refuge\/alaska_maritime\/).\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS mloewen@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No significant ongoing earthquake activity; alert level returned to UNASSIGNED\/UNASSIGNED.","sentUtc":"2023-11-24","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2023-11-22T16:12:18-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-11-22T16:12:18-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-11-22T16:12:18-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231103\/1631Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1578\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ELow-level ash emissions at Shishaldin Volcano are no longer visible in satellite data and seismicity and infrasound data show a decline in activity.  The Aviation Color Code and Alert Level remain at ORANGE\/WATCH. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notices about significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ash emissions have ended or paused. ","sentUtc":"2023-11-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-11-02T22:10:08-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-11-02T22:10:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-11-02T22:10:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231103\/0545Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1577\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn explosive eruption of Shishaldin Volcano began around 03:40 UTC on November 3 (19:40 AKDT on November 2). Ash was first observed in satellite data at 04:00 UTC (20:00 AKDT) at an altitude of 20,000 ft above sea level. This is a decrease in the cloud height from the initial estimate and the National Weather Service has modified their SIGMET because of the refined analysis of the cloud altitude. Seismic, infrasound and satellite data show the eruption continues at a constant level. The Aviation Color Code and Alert Level remain at ORANGE\/WATCH. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notices about significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E20,000 ft\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Emoving towards the west\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption continues with an ash cloud to 20,000 ft above sea level.","sentUtc":"2023-11-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-11-02T21:07:03-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-11-02T21:07:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-11-02T21:07:03-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231103\/0431Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1575\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano. An increase in tremor has been observed in seismic and infrasound data beginning at around 7:00 pm AKDT (3:00 UTC 11\/3). These signals indicate that the volcano is likely erupting. No ash cloud has been observed in satellite data.  Due to the increase in activity, the Aviation Color Code and Volcano Alert Level for Shishaldin Volcano are being raised to ORANGE\/WATCH.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Level of unrest has increased. Tremor is obsverved in satellite and infrasound data. Shishaldin taken to Orange\/Watch.","sentUtc":"2023-11-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-11-02T20:10:17-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-11-02T20:10:17-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-11-02T20:10:17-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231031\/2051Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1562\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity at Shishaldin Volcano has decreased over the past few weeks. While current seismicity consisting of low-level tremor and small low frequency earthquakes continues above background levels, there have been no large ash-producing explosions at the volcano since October 3, 2023. Recent satellite observations also show a decrease in surface temperatures and a decline in sulfur dioxide emissions. Due to this decrease in activity, the Alaska Volcano Observatory is lowering the Aviation Color Code for Shishaldin Volcano to YELLOW and the Alert Level to ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe recent episode of activity at Shishaldin began on July 11, 2023 with the observation of strongly elevated surface temperatures at the summit in satellite data and increasing seismic activity. A significant explosion was observed on July 14 2023 that produced an ash cloud to over 30,000 ft. Eleven more significant explosions followed over the next 3 months with the last explosive eruption occurring on Oct. 3, 2023. Additional ash-producing explosive eruptions are possible and would likely be preceded by increases in seismic tremor and elevated surface temperatures. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Due to decreasing seismicity and surface temperatures over the past few weeks - Shishaldin taken to Yellow\/Advisory","sentUtc":"2023-10-31","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-10-30T14:29:52-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-30T14:29:52-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-30T14:29:52-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231030\/2214Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAniakchak (VNUM #312090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1557\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 56 deg 54 min W 158 deg 12 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4400 ft (1341 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe Alaska Volcano Observatory (AVO) has experienced the failure of seismic monitoring equipment at Aniakchak Volcano and the remaining instrumentation is insufficient to establish that the volcano is at a typical background level. It is not possible to repair this equipment until next summer's field season. As a result, AVO is unable to (1) assess whether this volcano may be building towards an eruption and (2) quickly confirm or dismiss reports of activity.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBecause this volcano is no longer seismically monitored at adequate levels, the Aviation Color Code and Volcano Alert Level are changed to UNASSIGNED\/UNASSIGNED.  As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, regional seismic, infrasound and lightning networks, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAniakchak volcano, located in the central portion of the Alaska Peninsula, consists of a stratovolcano edifice with a 10 km (6 mile) diameter summit caldera. The caldera-forming eruption occurred around 3,500 years ago. Postcaldera eruptions have produced lava domes, tuff cones, and larger spatter and scoria cone structures including Half-Cone and Vent Mountain all within the caldera. The most recent eruption occurred in 1931 and created a new vent and lava flows on the western caldera floor while spreading ash over much of southwestern Alaska. Aniakchak volcano is 25 km (15 miles) southeast of the nearest community, Port Heiden, and 670 km (416 miles) southwest of Anchorage, Alaska. \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca target=\u0022_blank\u0022 href=\u0022https:\/\/gcc02.safelinks.protection.outlook.com\/?url=http%3A%2F%2Fwww.avo.alaska.edu%2F&data=05%7C01%7Chdietterich%40usgs.gov%7C4e428a02cf274911103408db150551b8%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C638126884815330179%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=mrKsTvh8yVAs%2FbGq6tQapOq6Q773zJjI9UTvyFMD7YE%3D&reserved=0\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level decreased to UNASSIGNED\/UNASSIGNED due to failure of monitoring equipment.","sentUtc":"2023-10-30","obs":"avo","vName":"Aniakchak","vnum":"312090","noticeId":"DOI-USGS-AVO-2023-10-30T11:47:57-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-30T11:47:57-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-30T11:47:57-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231024\/2255Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EBogoslof (VNUM #311300)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1535\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E492 ft (150 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past three days, over 90 earthquakes have been detected in the vicinity of Bogoslof volcano. This marks a change in behavior and the Aviation Color Code and Volcano Alert Level is being increased to YELLOW\/ADVISORY. Increases in seismic activity typically precede eruptions, but many volcanoes have exhibited similar behavior that did not result in eruptions. There have been no other signs of unrest observed in satellite data over the past several days.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBogoslof volcano is monitored using a single local seismic station, distant seismic and infrasound instruments, satellite data and lightning detection.  At least nine historical eruptions have been documented at Bogoslof volcano. The most recent occurred from December 2016 to August 2017 and produced seventy main explosive events that generated volcanic ash clouds that rose as high as 13 km (42,500 ft) above sea level, and that greatly modified the topography of Bogoslof Island.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBogoslof volcano is located about 98 km (61 mi) northwest of Unalaska\/Dutch Harbor, 123 km (76 mi) northeast of Nikolski, and 149 km (93 mi) northeast of Akutan. It is within the U.S. Fish and Wildlife Service Alaska Maritime National Wildlife Refuge and is habitat for marine mammals and seabirds (https:\/\/www.fws.gov\/refuge\/alaska_maritime\/).\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS cwaythomas@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EJessica Larsen, Acting Coordinating Scientist, UAFGI jflarsen\u003Ca target=\u0022_blank\u0022 href=\u0022mailto:dfee1@alaska.edu\u0022\u003E@alaska.edu\u003C\/a\u003E (907) 378-5460 \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Bogoslof alert level increased from UNASSIGNED\/UNASSIGNED to YELLOW\/ADVISORY. ","sentUtc":"2023-10-24","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2023-10-24T13:43:24-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-24T13:43:24-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-24T13:43:24-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231015\/2043Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1505\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EClear web camera views of Shishaldin from yesterday and today show a robust vapor cloud at the volcano's summit. This vapor plume likely consists primarily of steam and other volcanic gases. The vapor cloud does not indicate that an eruption is in progress and probably reflects the interaction of hot material and snow and ice. The Aviation Color Code remains at ORANGE and the Volcano Alert Level at WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E10,000 to 20,000 feet above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Robust steam emissions at summit.","sentUtc":"2023-10-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-10-15T12:17:15-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-15T12:17:15-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-15T12:17:15-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231013\/1844Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EWrangell (VNUM #315020)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1495\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 62 deg  W 144 deg 1 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EWrangell Volcanic Field\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E14163 ft (4317 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EDue to a station outage, the Alaska Volcano Observatory (AVO) has lost the capability to monitor Mount Wrangell volcano seismically and cannot reliably detect changes in unrest at the volcano. AVO is moving the Volcano Alert Level and Aviation Color Code of Mount Wrangell to UNASSIGNED. As at other Alaska volcanoes, AVO will continue using satellite, regional infrasound, lightning data, and reports from pilots and ground observers to detect signs of eruptive activity should they occur.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMt. Wrangell is a 4317 m (14,163 ft) high, andesitic, shield volcano with an ice-filled summit caldera, located in the Wrangell-St. Elias National Park and Preserve. Mt. Wrangell has three small post-caldera craters, named North Crater, East Crater, and Mt. Zanetti. These craters are all geothermally active, and there are frequent historical reports of steam from Mt. Wrangell. There are also several questionable reports of historical eruptive activity. Mt. Wrangell is 330 km (206 mi) northeast of Anchorage.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"The seismic network on Mount Wrangell volcano is no longer functioning.","sentUtc":"2023-10-13","obs":"avo","vName":"Wrangell","vnum":"315020","noticeId":"DOI-USGS-AVO-2023-10-13T10:21:13-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-13T10:21:13-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-13T10:21:13-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231003\/1836Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1463\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe explosive ash eruption of Shishaldin Volcano that started this morning at 5:50 AKDT (13:50 UTC) has ended. Clear webcam views show steaming at the volcano's summit. The Aviation Color Code is being lowered to ORANGE and the Volcano Alert Level to WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic and infrasound activity are diminished but still slightly above background. Volcanic flows on the flanks of the volcano may create lower-level ash emissions. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone observed; low-level ash may be produced from volcanic flows\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Explosive ash eruption that started at 5:50 AKDT (13:50 UTC) has ended. Aviation Color Code and Volcano Alert Level lowered to ORANGE\/WATCH. ","sentUtc":"2023-10-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-10-03T10:04:41-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-03T10:04:41-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-03T10:04:41-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231003\/1731Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1462\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAsh emissions from Shishaldin Volcano continue since starting this morning at 5:50 AKDT (13:50 UTC), but at a lower level of 20,000 to 25,000 ft asl after an initial height of ~40,000 ft asl. Seismicity and infrasound have diminished but are still above background. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Aviation Color Code remains at RED and the Volcano Alert Level at WARNING. The National Weather Service has issued a SIGMET for this ash cloud, and a Special Weather Statement has been issued for possible ashfall on Unimak Island and the lower Alaska Peninsula, including False Pass, Cold Bay, and Sand Point. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions may continue for a few more hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E25,000 ft asl\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Explosive ash eruption that started at 5:50 AKDT (13:50 UTC) continues, but at a lower level (appx. 20,000 ft asl). ","sentUtc":"2023-10-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-10-03T09:00:39-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-03T09:00:39-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-03T09:00:39-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231003\/1412Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1461\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano reaching 40,000 ft (12 km) above sea level was observed in satellite data at 5:20 am AKDT (13:50 UTC). This follows a several-hour increase in observed eruptive activity, and a recent sharp increase in infrasound, seismicity, and lighting detections. In response, the Aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING. The National Weather Service has issued a SIGMET for this ash cloud. Based on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EOver 40,000 ft (12 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAsh plume is drifting south\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An explosive eruption is underway with an ash cloud up to 40,000 ft (12 km) above sea level.","sentUtc":"2023-10-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-10-03T06:01:15-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-03T06:01:15-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-03T06:01:15-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20231003\/0743Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1459\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEruptive activity at Shishaldin has increased in the last 2 hours with lava fountaining observed. Starting at 9:00 pm AKDT (October 3 05:00 UTC) seismic activity at the volcano began to increase significantly. Around the same time, satellite images showed an increase in surface temperature consistent with lava fountaining, which was confirmed in clear web camera images. This fountaining has produced small hot avalanches of rock and lava down the slope of the volcano, and likely is producing minor ash clouds downwind of the volcano but these have not been large enough to detect in satellite images.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, more significant ash emissions are likely to occur, however, the time from initial activity to more significant explosions ranges from hours to over a day.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Lava fountaining and seismicity increased, larger ash event possible.","sentUtc":"2023-10-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-10-02T23:14:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-10-02T23:14:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-10-02T23:14:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230925\/2049Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1432\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ECORRECTION:  The ash cloud from this morning’s eruption detached from the volcano around 07:00 AKDT (15:00 UTC) and is drifting east-southeast at an altitude of 38,000 ft above sea level. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EActivity at Shishaldin Volcano has declined significantly. Seismicity decreased rapidly around 06:00 AKDT (14:00 UTC) and no significant ash emissions from the volcano are being observed in satellite data at this time. In response, AVO is lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe ash cloud from this morning’s eruption detached from the volcano around 07:00 AKDT (15:00 UTC) and is drifting east-southeast at an altitude of 38,000 ft above sea level.  Ash emissions continued at a lower altitude of about 20,000–25,000 ft above sea level until about 08:20 AKDT (16:20 UTC). Small explosions are currently being detected in infrasound data and likely represent low-level eruptive activity near the vent area.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrace to minor amounts of ashfall were reported by the communities of False Pass, King Cove, Cold Bay and Sand Point.  Ashfall occurred during rainfall in all four communities. No ashfall is expected from the current small explosions that are being detected in infrasound. Refer to the National Weather Service SIGMET for the drifting ash cloud (https:\/\/www.weather.gov\/aawu\/sigmets) and the Ashfall Advisory and Special Weather Statement for trace to minor amounts of ashfall on communities on the lower Alaska Peninsula and surrounding waters (https:\/\/www.weather.gov\/afc\/).\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, pyroclastic flows and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9,500 ft above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EDrifting cloud from the main explosion moving east-southeast of the volcano\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity and ash emissions have declined significantly. Color Code reduced to ORANGE and Alert Level to WATCH.","sentUtc":"2023-09-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-25T12:47:47-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-25T12:47:47-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-25T12:47:47-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230925\/2034Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1431\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EActivity at Shishaldin Volcano has declined significantly. Seismicity decreased rapidly around 06:00 AKDT (14:00 UTC) and no significant ash emissions from the volcano are being observed in satellite data at this time. In response, AVO is lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe ash cloud from this morning’s eruption detached from the volcano around 07:00 AKDT (15:00 UTC) and is drifting east-southeast at an altitude of 45,000 ft above sea level.  Ash emissions continued at a lower altitude of about 20,000–25,000 ft above sea level until about 08:20 AKDT (16:20 UTC). Small explosions are currently being detected in infrasound data and likely represent low-level eruptive activity near the vent area.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrace to minor amounts of ashfall were reported by the communities of False Pass, King Cove, Cold Bay and Sand Point.  Ashfall occurred during rainfall in all four communities. No ashfall is expected from the current small explosions that are being detected in infrasound. Refer to the National Weather Service SIGMET for the drifting ash cloud (https:\/\/www.weather.gov\/aawu\/sigmets) and the Ashfall Advisory and Special Weather Statement for trace to minor amounts of ashfall on communities on the lower Alaska Peninsula and surrounding waters (https:\/\/www.weather.gov\/afc\/).\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, pyroclastic flows and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9,500 ft above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EDrifting cloud from the main explosion moving east-southeast of the volcano\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity and ash emissions have declined significantly. Color Code reduced to ORANGE and Alert Level to WATCH.","sentUtc":"2023-09-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-25T11:25:07-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-25T11:25:07-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-25T11:25:07-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230925\/1509Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1430\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano initially reached 45,000 ft (14 km) above sea level starting at 05:42 am AKDT (13:42 UTC). Ash emissions continue but the height is decreasing. Seismic activity dropped sharply along with the start of ash emissions and now is at low levels. The Aviation Color Code remains at RED and the Volcano Alert Level at WARNING. The National Weather Service has issued a SIGMET for this ash cloud, an Ash Advisory has been issued for False Pass, and a Special Weather Statement has been issued for possible trace ash on Cold Bay, King Cove, and Sand Point.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic flows and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E45,000 ft. above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Emoving east\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An explosive eruption is underway with an ash cloud reaching 45,000 ft (14 km) above sea level.","sentUtc":"2023-09-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-25T07:06:12-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-25T07:06:12-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-25T07:06:12-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230925\/1402Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1427\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano initially reached 45,000 ft (14 km) above sea level starting at 05:42 am AKDT (13:42 UTC). Ash emissions continue but the height is decreasing. Seismic activity dropped sharply along with the start of ash emissions and now is at low levels. The Aviation Color Code remains at RED and the Volcano Alert Level at WARNING. The National Weather Service has issued a SIGMET for this ash cloud, an Ash Advisory has been issued for False Pass, and a Special Weather Statement has been issued for possible trace ash on Cold Bay, King Cove, and Sand Point.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic flows and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E45,000 ft. above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Emoving east\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An explosive eruption is underway with an ash cloud reaching 45,000 ft (14 km) above sea level.","sentUtc":"2023-09-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-24T20:21:40-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-24T20:21:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-24T20:21:40-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230925\/1325Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1428\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of activity at Shishaldin remains high, with increasing seismicity and evidence for lava eruption and volcanic flows. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EElevated surface temperatures consistent with lava fountaining over the crater rim have been observed during clear conditions overnight. Low-level ash emissions less than 15,000 ft. (4.5 km) above sea level were observed starting at 6 pm AKDT yesterday (02:00 UTC September 25), but these dissipated quickly. Beginning at 12 am AKDT today (08:00 UTC), a series of seismic signals consistent with volcanic flows were recorded on the north side of the volcano. Meteorologic clouds up to 20,000 ft. (6 km) above sea level have obscured view of the volcano since this time, and no ash emissions above this level have been observed.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe current period of heightened seismicity at Shishaldin, which started yesterday morning, has lasted longer than previous events during the 2023 eruption. It remains possible that higher ash emissions will occur along with this increased activity.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPrevious recent significant ash events resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower level and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notices about significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot observed currently\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAny ash emissions remain below 20,000 ft. asl\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity continues to rise; high ash emissions not observed but could occur anytime","sentUtc":"2023-09-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-25T04:38:24-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-25T04:38:24-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-25T04:38:24-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230925\/0215Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1426\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of activity has increased at Shishaldin Volcano. After a prolonged low-level eruption over the past day, a strong increase in seismic tremor over the past hour and continued high temperatures at the volcano observed in satellite data over the past 18 hours suggests that stronger explosive activity is likely imminent. Elevated surface temperatures consistent with lava erupting at the summit are evident in the latest satellite data, but no significant ash emissions have been observed. Based on previous eruption cycles, ash emissions are likely to occur and may increase in the next several hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is intensifying and an explosive eruption is likely in the next several hours","sentUtc":"2023-09-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-24T18:00:32-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-24T18:00:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-24T18:00:32-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230924\/1700Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1422\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EGeophysical and remote sensing data indicate that low-level eruption at Shishaldin Volcano continues but remains confined to the summit crater. Strongly elevated surface temperatures and some small-amplitude infrasound detections are occuring. Seismic tremor remains high but has started to slowly decline over the past eight hours. No ash emissions or deposits outside the crater have been observed in satellite or web camera imagery. Based on previous eruptive episodes, it remains possible that this activity may culminate in more significant lava fountaining and ash emissions. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level. These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Low-level eruption continues. Seismicity at high levels, but declining. More significant eruptive activity remains possible.","sentUtc":"2023-09-24","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-24T07:53:38-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-24T07:53:38-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-24T07:53:38-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230924\/0825Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1421\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic tremor remains high at Shishaldin Volcano and nearly continuous small infrasound signals are being detected suggesting that low-level eruptive activity is likely occurring with the summit crater. Based on previous eruptive episodes, this activity may culminate in more significant lava fountaining and ash emissions within hours. However, no strongly elevated temperatures indicative of lava at the surface or ash emissions have accompanied the elevated geophysical data thus far. The volcano is mostly obscured by clouds between 10,000 and 15,000 ft above sea level, which preclude observations of possible low-level activity. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level. These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity continues a high levels and a low-level eruption is likely underway. Likelihood of more significant eruptive activity remains high.","sentUtc":"2023-09-24","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-23T23:48:23-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-23T23:48:23-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-23T23:48:23-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230924\/0211Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1420\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic tremor has continued to increase over the day at Shishaldin Volcano and geophysical signals suggest low-level eruptive activity is likely occurring with the summit crater. Based on previous episodes of activity, this activity may culminate in more significant lava fountaining and ash emissions within hours. However, no strongly elevated temperatures indicative of lava at the surface or ash emissions have accompanied the elevated seismicity thus far. The volcano is mostly obscured by clouds between 2,000 and 15,000 ft above sea level, which preclude observations of possible low-level activity. However, regional infrasound sensors have detected some signals from the direction of Shishaldin that suggest minor eruptive activity within the summit crater may been occurring. If geophysical or remote sensing signals intensify or a significant eruption begins, the Alaska Volcano Observatory will issue further notices of volcanic activity. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level. These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity continues to increase and a low-level eruption is likely underway. Likelihood of more significant eruptive activity remains high.","sentUtc":"2023-09-24","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-23T17:14:58-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-23T17:14:58-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-23T17:14:58-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230923\/2028Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1415\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano. Seismic tremor has increased significantly over the past 36 hours. No strongly elevated temperatures indicative of lava at the surface or ash emissions have accompanied the elevated seismicity at this time, although the volcano is obscured by clouds. Based on previous episodes of activity, eruptive activity in the form of lava fountaining and ash emissions is possible within hours. If geophysical or remote sensing signals intensify, the Alaska Volcano Observatory will issue further notices of volcanic activity. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level. These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is elevated and increasing, and an eruption is possible in the coming hours","sentUtc":"2023-09-23","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-23T07:37:50-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-23T07:37:50-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-23T07:37:50-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230916\/0844Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1393\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EActivity at Shishaldin Volcano has declined. Seismicity decreased rapidly around 6:30 pm AKDT Sept. 15  (4:30 UTC, Sept. 16) yet remained elevated until 9:00 p.m. AKDT.  During this period of waning seismicity, volcanic lightning continued to be detected, indicating continued ash production.  The last detection of volcanic lighting was at 8:48 p.m. AKDT and seismicity has returned to pre-eruptive levels, indicating that significant ash emissions have ended. Thus, the Aviation Color Code and Volcano Alert Level are being decreased to ORANGE\/WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrace ash fall was reported in the community of False Pass between 18:00 and 20:30 AKDT (0200 to 0430 UTC). The National Weather Service has issued a SIGMET for the drifting ash cloud, and a Special Weather Statement has been issued for trace ash on False Pass.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity has decreased and significant ash emissions has ended.","sentUtc":"2023-09-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-15T23:52:02-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-15T23:52:02-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-15T23:52:02-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230916\/0524Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1392\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe explosive eruption at Shishaldin Volcano continues, but has decreased in intensity. An explosive event began at 5:10 p.m. AKDT on September 15, 2023 (01:10 UTC on Sept 16) after a period of rapidly increasing seismicity. The explosive event produced an ash-rich cloud that the National Weather Service estimated reached an altitude of 42,000 ft  (12.8 km) above sea level and was accompanied by volcanic lightning.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThis upper level cloud detached from the vent around 18:30 AKDT (0230 UTC) and is drifting towards the east. Seismicity began to decrease dramaticially at about this same time. Beginning around 19:30 AKDT (0330 UTC), lightning resumed indicating continued ash emssions. The meterological cloud deck over the volcano is currently at about 22,500 ft (6.8 km) above sea level and ash emissions are not visible in satellite data. Explosions continue to be detected in infrasound data, at a lower level than during the most energetic phase of this event. Seismicity is lower, it has not reached its pre-event levels and the Aviation Color Code and Volcano Alert Level remain at RED\/WARNING.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrace ash fall was reported in the community of False Pass between 18:00 and 20:30 AKDT (0200 to 0430 UTC). The National Weather Service has issued a SIGMET for the drifting ash cloud, and a Special Weather Statement has been issued for trace ash on False Pass.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ELess than 22,000 ft.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAsh emission likely based on infrasound, seismic and lightning data.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption continuing with decreased intensity and ash production.","sentUtc":"2023-09-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-15T20:40:40-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-15T20:40:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-15T20:40:40-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230916\/0141Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1391\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn explosive eruption from Shishaldin began around 5:10 p.m. AKDT on September 15, 2023 (01:10 UTC on Sept 16) following a several-hour increase in seismicity.  Ash is currently being produced and is drifting to the east below the cloud deck of 27,000 ft above sea level. The Aviation Color Code and Volcano Alert Level is being raised to RED\/WARNING.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption underway with ash production.  Color code raised to RED\/WARNING.","sentUtc":"2023-09-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-15T17:30:44-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-15T17:30:44-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-15T17:30:44-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230915\/2252Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1390\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest is increasing at Shishaldin Volcano. Seismic tremor has intensified over the past 6 hours and, during Shishaldin's ongoing eruptive period, this has often been followed by ash-producing explosive activity over the next several hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is intensifying, increasing the likelihood an eruption.","sentUtc":"2023-09-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-15T13:51:34-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-15T13:51:34-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-15T13:51:34-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230914\/1934Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1386\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EFollowing the eruptive activity at Shishaldin Volcano overnight, the level of unrest has reduced significantly. Seismicity declined starting about 7:30 AKDT (15:30 UTC) and remains at low levels. No ash emissions were observed during the period of elevated seismicity overnight, but high clouds were present and could have obscured low-level ash emissions.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enon observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity has reduced significantly.","sentUtc":"2023-09-14","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-14T11:05:58-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-14T11:05:58-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-14T11:05:58-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230914\/0958Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1382\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has slowly increased at Shishaldin Volcano. A steady increase in seismic tremor over the past 7 hours suggests that explosive activity is likely.  Cloud cover is currently obscuring satellite views of the volcano. Web camera views show incandescent lava at the summit. Based on previous eruption cycles, ash emissions are likely to occur over the next several hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is increasing, and an explosive eruption is likely.","sentUtc":"2023-09-14","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-13T23:01:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-13T23:01:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-13T23:01:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230905\/2214Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1361\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EActivity at Shishaldin Volcano has declined. Web camera observations through 1:30 pm AKDT (21:30 UTC) show that significant ash emissions have ended. Seismicity decreased rapidly around 12:30 pm AKDT (20:30 UTC) and remains low. Thus, the Aviation Color Code and Volcano Alert Level are being decreased to ORANGE\/WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe National Weather Service has issued a SIGMET for the ash cloud (https:\/\/www.weather.gov\/aawu\/sigmets), and a Special Weather Statement and a Marine Weather Statement has been issued for possible trace ash fall on Unimak Island and on nearby marine waters, respectively.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E20,000 ft - 25,000 ft \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EEstimate based on winds and satellite obs.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Significant ash emissions have ended and seismcity has decreased.  ","sentUtc":"2023-09-05","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-05T13:50:49-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-05T13:50:49-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-05T13:50:49-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230905\/2046Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1360\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003E\u003Cem\u003E\u003Cstrong\u003ECorrection to previous VAN\/VONA issued at 12:31 PM AKDT\u003C\/strong\u003E\u003C\/em\u003E\u003Cem\u003E\u003Cstrong\u003E. \u003C\/strong\u003E\u003C\/em\u003E\u003Cem\u003E\u003Cstrong\u003EAlert Level remains at WARNING. \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAn explosive eruption from Shishaldin began at ~08:30 AKDT (1630 UTC) following a several-hour increase in seismicity and produced an extensive ash cloud that moved towards the south-southeast at an estimated altitude of 32,000 ft (9.7 km) above sea level. Around 19:00 AKDT (1900 UTC) seismic amplitude decreased rapidly, and the altitude of the ash emissions as observed by satellite also decreased to an estimated altitude of ~15,000 ft (4.5 km). At 12:00 pm AKDT (2000 UTC), the lower-altitude ash cloud extended for ~75 miles (125 km) towards the east. The Aviation Color Code and Volcano Alert Level remains at RED\/WARNING.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe National Weather Service has issued a SIGMET for the ash cloud (https:\/\/www.weather.gov\/aawu\/sigmets), and a Special Weather Statement and a Marine Weather Statement has been issued for possible trace ash fall on Unimak Island and on nearby marine waters, respectively. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E15,000 ft\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EEstimate based on winds and satellite obs.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Correction to previous VAN\/VONA. Alert Level remains at WARNING. Ash emissions continue with a decrease in altitude to 15,000 ft.","sentUtc":"2023-09-05","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-05T12:41:31-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-05T12:41:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-05T12:41:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230905\/2031Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1358\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn explosive eruption from Shishaldin began at ~08:30 AKDT (1630 UTC) following a several-hour increase in seismicity and produced an extensive ash cloud that moved towards the south-southeast at an estimated altitude of 32,000 ft (9.7 km) above sea level. Around 19:00 AKDT (1900 UTC) seismic amplitude decreased rapidly, and the altitude of the ash emissions as observed by satellite also decreased to an estimated altitude of ~15,000 ft (4.5 km). At 12:00 pm AKDT (2000 UTC), the lower-altitude ash cloud extended for ~75 miles (125 km) towards the east. The Aviation Color Code and Volcano Alert Level remains at RED\/WARNING.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe National Weather Service has issued a SIGMET for the ash cloud (https:\/\/www.weather.gov\/aawu\/sigmets), and a Special Weather Statement and a Marine Weather Statement has been issued for possible trace ash fall on Unimak Island and on nearby marine waters, respectively. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E15,000 ft\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EEstimate based on winds and satellite obs.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ash emissions continue with a decrease in altitude to 15,000 ft.","sentUtc":"2023-09-05","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-05T10:52:27-08:00","colorCode":"RED","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-05T10:52:27-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-05T10:52:27-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230905\/1701Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1356\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano reaching 25,000 ft (7.3 km) above sea level and rising was reported by a pilot at at 8:42 am AKDT (1642 UTC). Satellite data suggests that the cloud may be as high as 30,000 ft above sea level (9.1 km). This follows a several-hour increase in seismicity. In response, the Aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING. The cloud is visible in satellite data moving towards the southeast and lightning associated with the ash cloud has been detected. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E30,000 ft\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EPIREP and satellite data\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Alert Level Increased to RED\/WARNING. Explosive eruption is underway,. Ash cloud up to 24,000 ft msl.","sentUtc":"2023-09-05","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-09-05T08:46:53-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-09-05T08:46:53-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-09-05T08:46:53-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230826\/0831Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1320\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ESatellite observations through 1200 am AKDT (0800 UTC) show that ash emissions have ended. Seismicity decreased rapidly around 5:30 pm AKDT (0130 UTC on 26 August) and remains low. Thus, the Avation Color Code and Volcano Alert Level are being decreased to ORANGE\/WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe National Weather Service is responsible for tracking the drifting ash cloud and SIGMETs have been issued today and will continue until the cloud disperses. See https:\/\/www.weather.gov\/aawu\/SIGMETs for current information for aviation.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESatellite data show ash emissions have ended.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Decrease in Aviation Color Code\/Alert Level to ORANGE\/WATCH. Ash emissions have ended. Seismicity at low levels.","sentUtc":"2023-08-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-25T20:54:46-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-25T20:54:46-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-25T20:54:46-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230826\/0420Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1319\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity is continuing at Shishaldin Volcano. An ash cloud continues to be observed in satellite data at an altitude of 21,000 ft (6.4 km) above sea level moving towards the northeast. This is a decrease in altitude from earlier today. Seismic tremor decreased rapidly around 5:30 pm AKDT (0130 UTC) and is approaching levels observed prior to the onset of ash emissions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, it is likley that ash emissions are starting to decrease and may end over the next few hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano. Minor to trace amounts of ash fall are likely to the north of the volcano and in the water immediately offshore. No ash fall is expected in populated areas.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe National Weather Service is responsible for tracking the drifting ash cloud and SIGMETs have been issued throughout the day. See https:\/\/www.weather.gov\/aawu\/SIGMETs for current information for aviation.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E21,000 ft msl \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EObserved in satellite data moving northeast\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption continues and cloud height has decreased to to 21,000 ft (6.4 km) above sea level, moving northeast.","sentUtc":"2023-08-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-25T19:52:28-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-25T19:52:28-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-25T19:52:28-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230826\/0132Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1318\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity is continuing at Shishaldin Volcano. An ash cloud rising to about 30,000 ft (9 km) above sea level and extending roughly 280 miles (450 km) northeast of the volcano is evident in satellite data. A SIGMET for this ash cloud has been issued. Seismic tremor increased this afternoon and peaked around 4:30 pm Alaska time (00:30 UTC). The tremor has since dropped but remains elevated.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for the next few hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EDrifting at about 30,000 ft (9 km) above sea level.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption cloud to 30,000 ft (9 km) above sea level continues, drifting northeast.","sentUtc":"2023-08-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-25T18:10:59-07:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-25T18:10:59-07:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-25T18:10:59-07:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230825\/2004Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1317\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano reaching 28,000 ft (8.5 km) has been reported by aircraft in the vicinity of the volcano. This follows a several-hour increase in seismic activity. In response, the Aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E30,000 ft. (9 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Elower plume driving NE, higher plume E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An explosive eruption is underway with an ash cloud now up to 28,000 ft (8.5 km) above sea level.","sentUtc":"2023-08-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-25T12:49:03-07:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-25T12:49:03-07:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-25T12:49:03-07:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230825\/1936Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1316\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano. Seismic tremor began to increase at around 03:00 this morning Alaska time (11:00 UTC) and is escalating. Elevated surface temperatures consistent with lava erupting at the summit are evident in the latest satellite data. Local infrasound data suggests low-level explosions are occurring. Based on previous eruption cycles over the past month, ash emissions are likely over the next few hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThere have been seven significant explosive events during the current eruption. These have resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level and pyroclastic deposits near the volcano.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide updates of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is increasing, and an explosive eruption is likely.","sentUtc":"2023-08-25","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-25T12:05:35-07:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-25T12:05:35-07:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-25T12:05:35-07:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230825\/1806Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECleveland (VNUM #311240)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1311\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5676 ft (1730 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA decrease in seismic activity at Mount Cleveland over the past few weeks to background levels has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY to GREEN\/NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAn increase in the number of small earthquakes near Mount Cleveland in mid-July 2023 prompted raising the Aviation Color Code and Volcano Alert Level from UNASSIGNED\/UNASSIGNED to YELLOW\/ADVISORY on July 19. This activity  continued for the next several weeks but has since declined. Slightly elevated surface temperatures and weak gas emissions from the summit crater continue to be observed occasionally, but this is not unusual for Mount Cleveland.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last eruptive activity at Mount Cleveland was a short-lived explosion during the evening (local time) of June 1, 2020. Despite the current pause, the eruptive period at Mount Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These have occurred without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMount Cleveland is currently monitored with a five-station real-time seismic network. We now have enough stations at the volcano to locate volcanic earthquakes thanks to a partnership between AVO and the AVERT (Anticipating Volcanic Eruptions in Real-Time) project at Columbia University. Based on past events, explosive eruptions of Cleveland may occur with little or no warning. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Decrease in seismic activity to background levels.","sentUtc":"2023-08-25","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2023-08-25T09:29:33-07:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-25T09:29:33-07:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-25T09:29:33-07:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230817\/1659Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAniakchak (VNUM #312090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1278\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 56 deg 54 min W 158 deg 12 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4400 ft (1341 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe number of earthquakes beneath Aniakchak volcano and the measurable uplift of the ground surface in the caldera have declined to background levels. Due to these changes, the Alaska Volcano Observatory is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL. There have been no signs of unrest in other monitoring data. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO monitors Aniakchak with a local network, which consists of six seismometers, a web camera, and a single infrasound sensor, as well as satellite remote sensing data and regional infrasound and lightning networks. To view current monitoring data, see \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Aniakchak.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Aniakchak.php\u003C\/a\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAniakchak volcano, located in the central portion of the Alaska Peninsula, consists of a stratovolcano edifice with a 10 km (6 mile) diameter summit caldera. The caldera-forming eruption occurred around 3,500 years ago. Postcaldera eruptions have produced lava domes, tuff cones, and larger spatter and scoria cone structures including Half-Cone and Vent Mountain all within the caldera. The most recent eruption occurred in 1931 and created a new vent and lava flows on the western caldera floor while spreading ash over much of southwestern Alaska. Aniakchak volcano is 25 km (15 miles) southeast of the nearest community, Port Heiden, and 670 km (416 miles) southwest of Anchorage, Alaska. \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca target=\u0022_blank\u0022 href=\u0022https:\/\/gcc02.safelinks.protection.outlook.com\/?url=http%3A%2F%2Fwww.avo.alaska.edu%2F&data=05%7C01%7Chdietterich%40usgs.gov%7C4e428a02cf274911103408db150551b8%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C638126884815330179%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=mrKsTvh8yVAs%2FbGq6tQapOq6Q773zJjI9UTvyFMD7YE%3D&reserved=0\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity beneath Aniakchak volcano has declined to background levels; Aviation Color Code and Volcano Alert Level lowered to GREEN\/NORMAL","sentUtc":"2023-08-17","obs":"avo","vName":"Aniakchak","vnum":"312090","noticeId":"DOI-USGS-AVO-2023-08-17T07:56:06-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-17T07:56:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-17T07:56:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230816\/1916Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1272\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of eruptive activity at Shishaldin Volcano has gradually declined since yesterday afternoon. Seismicity has decreased, and significant explosions or ash emissions are no longer detected. Clear web camera views this morning show only minor steaming at the summit. Recent satellite views indicated a persistent thermal anomaly at the summit, indicating the presence of hot eruptive material.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions may occur again and will likely be preceded by gradually increasing seismicity. Pyroclastic and mudflows will probably happen on the immediate flanks of the volcano should another vigorous episode of eruptive activity occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EMinor, mostly steam emissions.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruptive episode of the past several days has ended.","sentUtc":"2023-08-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-16T10:28:46-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-16T10:28:46-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-16T10:28:46-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230815\/2303Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1271\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity is continuing at Shishaldin Volcano. A low-level ash cloud to about 16,000 ft (5 km) above sea level and moving northeast is evident in satellite data and was observed by passing pilots. The National Weather Service has issued a SIGMET for this ash cloud.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions may continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lightning data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Edrifting below 16,000 ft (5 km) above sea level, see SIGMET. Emissions from the vent are likely occurring at low levels.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An ash plume to 16,000 ft (5 km) observed and drifting northeast.","sentUtc":"2023-08-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-15T14:45:05-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-15T14:45:05-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-15T14:45:05-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230815\/1135Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1266\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity is occurring at Shishaldin Volcano. A low-level ash cloud to about 25,000 ft (7.6 km) above sea level and moving northeast is evident in satellite data. This follows a several-hour increase in seismic tremor. Explosion signals have been detected in infrasound data since at least 2:00 AKDT (10:00 UTC) and the National Weather Service has detected lightning in the vicinity of the volcano. A SIGMET for this ash cloud has been issued.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for the next few hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Edrifting below 25,000 ft (7.6 km) above sea level, see SIGMET. Emissions from the vent are likely occurring at low levels.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An ash plume to 25,000 ft (7.6 km), drifting northeast detected.","sentUtc":"2023-08-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-15T03:11:31-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-15T03:11:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-15T03:11:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230815\/0227Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1265\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano. A steady increase in seismic tremor has been observed over the past 5 hours. Elevated surface temperatures consistent with lava erupting at the summit are evident in the latest satellite data. Based on previous eruption cycles over the past month, ash emissions are likely to occur and may increase over the next few hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is increasing, and an explosive eruption is likely.","sentUtc":"2023-08-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-14T18:16:47-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-14T18:16:47-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-14T18:16:47-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230805\/0355Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1216\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity has significantly declined at Shishaldin Volcano and any remaining ash emissions are likely low level. Seismic tremor began declining from a peak at 2:00 pm AKDT (22:00 UTC) and is and is currently at low levels. The eruption produced a sustained ash plume ash plume during the period of high seismicity which drifted to the northeast.  Currently, meteorological clouds at 30,000 ft (9 km) above sea level have obscured the volcano and any potential ash clouds.  It is possible that low level ash production could be continuing during this period of waning seismicity.  Due to this decrease in intensity of the eruption, the Aviation Color Code is being lowered to ORANGE and the Alert Level is being lowered to WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, mloewen@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShould volcanic activity change significantly, a new notice will be issued.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity has decreased in intensity, ash emissions most likely at low levels or ceased.","sentUtc":"2023-08-05","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-04T17:22:44-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-04T17:22:44-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-04T17:22:44-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230804\/2207Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1215\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEruptive activity continues at Shishaldin Volcano, with continuous ash emissions, strongly elevated surface temperatures, and high levels of seismic tremor. A continuous ash plume extends to the east-northeast with two branches visible in satellite imagery and confirmed by passing aircraft. The volcanic cloud extends up to ~112 miles (~180 km) from the volcano, with its top as high as 31,000 ft (9.4 km) above sea level. Additionally, a gas-rich but less ash-laden volcanic plume is also drifting to the southeast. The National Weather Service has issued a SIGMET for these ash clouds, a Marine Weather Statement and a Special Weather Statement for trace ash on marine waters and land areas downwind of Shishaldin Volcano. The color code and alert level remain at RED\/WARNING. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E31,000 ft. (9.4 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Elower plume drifting NE, higher plume E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, mloewen@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShould volcanic activity change significantly, a new notice will be issued.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ash emissions continue; plume as high as 31,000 ft (9.4 km) asl drifting primarily east-northeast; elevated seismic tremor continues.","sentUtc":"2023-08-04","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-04T13:48:44-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-04T13:48:44-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-04T13:48:44-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230804\/1817Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1214\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano reaching 30,000 ft (9 km) above sea level was observed in satellite data at 9:00 am AKDT (17:00 UTC). This follows a several-hour increase in observed eruptive activity. In response, the Aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING. The National Weather Service has issued a SIGMET for this ash cloud, and a Special Weather Statement has been issued for possible trace ash on marine waters downwind of Shishaldin Volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for several hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E30,000 ft. (9 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Elower plume driving NE, higher plume E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, mloewen@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An explosive eruption is underway with an ash cloud now up to 30,000 ft (9 km) above sea level.","sentUtc":"2023-08-04","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-04T10:02:36-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-04T10:02:36-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-04T10:02:36-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230804\/1704Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1213\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity is occurring at Shishaldin Volcano. A low-level ash cloud up to 25,000 ft (7.6 km) above sea level and extending 37-47 miles (60-75 km) northeast of the volcano is evident in satellite data at 5:20 AM AKDT (13:20 UTC) and reported by passing pilots at 8:36 AM AKDT (16:36 UTC). This follows a 20-hour increase in seismic tremor and an increase in surface temperatures at the volcano seen in satellite data. Explosion signals have been detected in infrasound and seismic data overnight during cloudy altmospheric conditions. Surface temperatures have greatly increased in the past few hours. The National Weather Service has issued a SIGMET for this ash cloud.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for the next few hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E25,000 ft (7.6 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EExtending up to 75 km northeast\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, mloewen@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"An ash plume observed to ~25,000 ft (7.6 km) asl and drifting northeast up to 47 miles (75 km).","sentUtc":"2023-08-04","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-04T08:29:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-04T08:29:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-04T08:29:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230804\/0136Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1205\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano. A steady increase in seismic tremor has been observed over the past 7 hours. Despite cloud cover obscuring the volcano, elevated surface temperatures consistent with lava erupting at the summit are evident in the latest satellite data. Based on previous eruption cycles, ash emissions are likely to occur and may increase over the next few hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERecent significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft (12 km) above sea level.  These events can occur with little warning. It is also possible that ash emissions may occur at a lower-level, steady state and be sustained for many hours. AVO is monitoring the volcano closely and will issue additional Volcanic Activity Notice’s to provide notice of significant changes in activity as they occur.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network.  In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, mloewen@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity is increasing, and an explosive eruption is likely.","sentUtc":"2023-08-04","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-08-03T17:17:51-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-03T17:17:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-03T17:17:51-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230803\/2342Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1198\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ENo eruptive activity has been observed at Semisopochnoi volcano since May 5, 2023, and there are no signs of heighted volcanic unrest. Reflecting these conditions, the Aviation Color Code is being lowered to GREEN and Volcano Alert Level to NORMAL. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last evidence of ash emissions from the volcano was observed on May 5 and consisted of a light dusting of ash on the northwest flank of Mount Young. The last detection of possible explosions in monitoring data was April 25, 2023.\u202fSince this time, earthquake activity has been at low levels. Steam plumes continue from the north crater of Mount Young. Although steaming was not observed from this vent prior the start of this eruption, it is common for steam plumes to persist at volcanoes for years following an eruption as the volcano slowly cools. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe current eruption sequence at Semisopochnoi began in September 2018 and has consisted of small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Young and ash clouds usually under 10,000 ft (3 km) above sea level with occasional periods of continuous ash production. While current observations indicate that this eruption may be over, it is also possible activity could resume, and small ash-producing events could occur with little warning. The Alaska Volcano Observatory will continue to closely monitor Semisopochnoi and report on any changes in activity. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u202f \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe remote Semisopochnoi volcano occupies a young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Young, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, mloewen@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERonni Grapenthin, Acting Coordinating Scientist, UAFGI, rgrapenthin@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Volcanic unrest has declined with no eruptive activity detected in 3 months. Aviation Color Code and Volcano Alert Level lowered to GREEN\/NORMAL.","sentUtc":"2023-08-03","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2023-08-03T09:36:51-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-08-03T09:36:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-08-03T09:36:51-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230726\/2127Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1146\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe eruption of Shishaldin Volcano has gradually declined after increasing overnight. Seismicity has decreased and significant explosions are no longer being detected in infrasound data. Meteorological clouds up to 20,000–25,000 ft (6.1–7.6 km) above sea level began obscuring views of the volcano starting around 11:30 am AKDT (17:30 UTC). It is likely that lingering low-level ash emissions are continuing in the vicinity of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic activity and satellite data indicated that eruptive activity began increasing around 10:00 pm AKDT on July 25 (July 26 06:00 UTC). A sustained 15,000 ft (6 km) ash cloud was detected around 5:00 am AKDT (13:00 UTC) and drifted ENE from the volcano. Ash emissions, while diffuse, were visible in satellite data extending about 78 mi (125 km) from the volcano until clouds obscured views starting around 11:30 AKDT (17:30 UTC). The National Weather Service issued a SIGMET for this cloud.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network has been partially impaired over the last few weeks due to telecommunications issues but seismic stations and web cameras south of the volcano were brought back online on July 19. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Edrifting below 15,000 ft (4.6 km) above sea level, see SIGMET. Emissions from the vent are likely occurring at low levels.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMatt Loewen, Acting Scientist-in-Charge, USGS, cwaythomas@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"- Explosive eruptive activity gradually declining. Lingering low-level ash emissions are possible in the vicinity of the volcano.","sentUtc":"2023-07-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-26T11:50:27-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-26T11:50:27-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-26T11:50:27-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230726\/1151Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1145\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity is occurring at Shishaldin Volcano. A low-level ash cloud to about 15,000 ft (6 km) above sea level and moving ENE is evident in satellite data. This follows a several-hour increase in seismic tremor and an increase in temperatures at the volcano seen in satellite data. Explosion signals have been detected in infrasound data since at least 02:00 AKDT (10 UTC). The National Weather Service has issued a SIGMET for this ash cloud, and a Marine Weather Statement has been issued for possible trace ash on marine waters NE of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for the next few hours. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last four significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft. (12 km) above sea level, similar to other historical eruptions. These events can occur with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network has been partially impaired over the last few weeks due to telecommunications issues but seismic stations and web cameras south of the volcano were brought back online on July 19. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E15,000 ft (4.6 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS, cwaythomas@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"A low-level ash cloud to 15,000 ft above sea level is evident in satellite data.","sentUtc":"2023-07-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-26T02:38:05-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-26T02:38:05-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-26T02:38:05-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230726\/1011Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1144\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano. A steady increase in seismic tremor over the past 4 hours and an increase in temperatures at the volcano observed in satellite data over the past 2 hours suggests that explosive activity is imminent.  Despite cloud cover obscuring the volcano, elevated surface temperatures consistent with lava erupting at the summit are evident in the latest satellite data. Based on previous eruption cycles, minor ash emissions are likely to occur and may increase over the next few hours. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last four significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 ft. (12 km) above sea level, similar to other historical eruptions. These events can occur with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network has been partially impaired over the last few weeks due to telecommunications issues but seismic stations and web cameras south of the volcano were brought back online on July 19. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown but explosive eruption is imminent.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS, cwaythomas@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismic activity has increased and therefore the likelihood of explosive activity in the near future has increased.","sentUtc":"2023-07-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-26T01:05:14-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-26T01:05:14-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-26T01:05:14-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230723\/1218Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1123\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EVolcanic activity has significantly declined at Shishaldin Volcano. Seismic tremor began declining from a peak at 12:30 am AKDT (08:30 UTC) and is and is currently at low levels. Significant ash eruption notably decreased in satellite data around 1:30 am (09:30 UTC). Satellite data continue to indicate elevated surface temperatures at the summit associated with lava erupting at the surface and possible low-level ash emissions below regional cloud tops which are currently at around 20,000 ft. (6 km) above sea level.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA sustained ash plume with a height of 37,000 ft. (11 km) above sea level erupted between 11:20 pm AKDT on July 22 (07:20 UTC on July 23) and 12:30 am on July 23 (08:30 UTC on July 23). Around this time plume height decreased to around 15,000 ft. (4.5 km) above sea level.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA detached plume is currently drifting to the northeast along the Alaska Peninsula. The National Weather Service has issued a SIGMET for this ash cloud, as well as a Marine Weather Statement and an Ashfall Advisory that were issued for areas that might expect ashfall associated with this eruption.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network has been partially impaired over the last few weeks due to telecommunications issues but seismic stations and web cameras south of the volcano were brought back online on July 19. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eunknown, below 20,000 ft. (6 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EMain eruption cloud detached and drifting to the northeast, see current NWS SIGMET. \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS, cwaythomas@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption activity reduced with detached ash plume drifting to the northeast.","sentUtc":"2023-07-23","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-23T03:48:19-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-23T03:48:19-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-23T03:48:19-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230723\/0743Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1122\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud from Shishaldin Volcano reaching 30,000 ft. (9 km) was observed in satellite data and pilot reports at 11:30 pm AKDT (07:30 UTC on July 23). This follows a several-hour increase in observed eruptive activity. In response, the aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING. The National Weather Service has issued a SIGMET for this ash cloud, and a Special Weather Statement has been issued for possible trace ash on False Pass.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBased on previous eruption cycles, significant ash emissions are likely to continue for an hour or more. Pyroclastic and mudflows are likely on the immediate flanks of the volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network has been partially impaired over the last few weeks due to telecommunications issues but seismic stations and web cameras south of the volcano were brought back online on July 19. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E30,000 ft. (9 km) above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EPlume is moving northeast\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS, cwaythomas@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ash plume observed to 30,000 ft. asl.","sentUtc":"2023-07-23","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-22T23:38:42-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-22T23:38:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-22T23:38:42-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230723\/0053Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1121\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of unrest has increased at Shishaldin Volcano over the past 6 hours. A steady increase in seismic tremor and intermittent infrasound signals consistent with small explosions are ongoing. Despite cloud cover obscuring the volcano, elevated surface temperatures consistent with lava erupting at the summit are evident in the latest satellite data. Based on previous eruption cycles, minor ash emissions are likely to occur and may increase over the next few hours. Clouds are obscuring web cameras and satellite images, and we have had no clear views of the volcano over the past day. Based on the level of unrest, we infer that any ash emissions occurring are below 20,000 ft. (6 km) above sea level and below the altitude of clouds in the region.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last three significant ash events during the current eruption resulted in ash clouds up to 40,000 ft. (12 km) above sea level, similar to other historical eruptions. These events can occur with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network has been partially impaired over the last few weeks due to telecommunications issues but seismic stations and web cameras south of the volcano were brought back online on July 19. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eunknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EMeteorological cloud tops 20,000\u201330,000 ft. (6\u20139 km) above sea level. Ash emissions possible below this level.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A 660 ft. (200 m) wide funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft. (14 km) above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS, cwaythomas@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption activity increasing, ash emissions possible up to 20,000 ft. asl.","sentUtc":"2023-07-23","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-22T15:49:07-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-22T15:49:07-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-22T15:49:07-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230719\/2018Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECleveland (VNUM #311240)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1094\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5676 ft (1730 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThere has been an increase in the number of earthquakes observed near Cleveland volcano over the past week. Numerous earthquakes have been detected and 37 of these were large enough to be located by the local seismic network. Most of the earthquakes from early in the week located in the mid to shallow portions of the Earth’s crust, less than 11 miles (18 km) below the surface, while more recent earthquakes have been located at shallower depths, less than 4 miles (6 km) below the surface. These earthquakes are small (less than magnitude 2), but the frequency of events is unusual for Cleveland. These data along with satellite observations of elevated surface temperatures at the summit crater and continued gas emissions suggest an increased likelihood of a future eruption. In response, the Alaska Volcano Observatory is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe last eruptive activity at Cleveland volcano was a short-lived explosion during the evening (local time) of June 1, 2020. Despite the current pause, the eruptive period at Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These have occurred without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano is currently monitored with a five-station real-time seismic network. Based on past events, explosive eruptions of Cleveland may occur with little or no warning. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Increased earthquake rate increases potential for eruption.","sentUtc":"2023-07-19","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2023-07-18T17:18:02-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-18T17:18:02-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-18T17:18:02-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230719\/0028Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETakawangha (VNUM #311090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1093\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 52 min W 178 deg 1 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4754 ft (1449 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEarthquake activity near Takawangha Volcano has decreased in both rate and magnitude from the peak of the swarm on March 9–11 when over 150 earthquakes per day were located on Tanaga Island to less than 3 earthquakes per day in the last few weeks. Recent satellite images do not indicate any ongoing deformation on the island. No other signs of volcanic unrest have been detected. The Alaska Volcano Observatory is therefore lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Alaska Volcano Observatory will continue to closely monitor seismic activity on Tanaga Island.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFor current monitoring data: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Takawangha.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Takawangha.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is a remote, 1,449 m (4,754 ft)-high stratovolcano located on the northeast portion of Tanaga Island, roughly 95 km (59 miles) west of Adak in the Andreanof Islands. Takawangha's summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. Takawangha lies across a saddle from historically active Tanaga volcano to the west. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred, and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity decreased to near background levels.","sentUtc":"2023-07-19","obs":"avo","vName":"Takawangha","vnum":"311090","noticeId":"DOI-USGS-AVO-2023-07-18T16:12:28-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-18T16:12:28-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-18T16:12:28-08:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230719\/0028Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETanaga (VNUM #311080)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1092\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 53 min W 178 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5925 ft (1806 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEarthquake activity near Tanaga Volcano has decreased in both rate and magnitude from the peak of the swarm on March 9–11 when over 150 earthquakes per day were located on Tanaga Island to less than 3 earthquakes per day in the last few weeks. Recent satellite images do not indicate any ongoing deformation on the island. No other signs of volcanic unrest have been detected. The Alaska Volcano Observatory is therefore lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe Alaska Volcano Observatory will continue to closely monitor seismic activity on Tanaga Island.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFor current monitoring data: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Tanaga.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Tanaga.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga Island lies in the Andreanof Islands approximately 100 km (62 miles) west of the community of Adak and 2025 km (1260 miles) SW of Anchorage. The northern half of the island is home to the Tanaga volcanic complex, comprising three main volcanic edifices. Tanaga Volcano is the tallest of these (1,806 m or 5,925 ft) and lies in the center of the complex. The last reported eruption of Tanaga occurred in 1914 and earlier eruptions were reported in 1763-1770, 1791, and 1829. Reports of these eruptions are vague, but deposits on the flanks of the volcano show that typical eruptions produce blocky lava flows and occasional ash clouds. Eruptions have occurred both from the summit vent and a 1,584 m (5,197 ft)-high satellite vent on the volcano's northeast flank. Immediately west of Tanaga volcano lies Sajaka, a 1,354 m (4,443 ft)-high compound edifice with an older cone to the east that collapsed into the sea within the last few thousand years, and a new cone that has grown in the breach. The new cone is 1,312 m (4,305 ft) high and consists of steeply dipping, interbedded cinders and thin, spatter-fed lava flows. To the east of Tanaga lies Takawangha, which is separated from the other active volcanic vents by a ridge of older rock. Takawangha's 1,449 m (4,754 ft)-high summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, and could produce localized debris avalanches. No historical eruptions are known from Sajaka or Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed only to Tanaga may instead have come from these other vents.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity decreased to near background levels.","sentUtc":"2023-07-19","obs":"avo","vName":"Tanaga","vnum":"311080","noticeId":"DOI-USGS-AVO-2023-07-18T15:37:02-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-18T15:37:02-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-18T15:37:02-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230718\/2008Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1084\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe eruption of Shishaldin Volcano has gradually declined. Current observations indicate continued but low-level ash emissions below 10,000 ft. (3 km) above sea level and drifting to the south. Reflecting this lower-level activity, the Aviation Color Code is being reduced to ORANGE and the Volcano Alert Level is being lowered to WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThis morning a significant ash plume was detected starting around 7:00 am AKDT (15:00 UTC) and reaching a height of around 30,000 ft. (7 km) above sea level. Around 9:30 am AKDT (17:30 UTC) satellite data showed the main initial plume had detached but residual, low-level ash emissions continued from the vent. The detached plume is still visible between 60–280 mi (100 and 450 km) away from the volcano. The National Weather Service has issued a SIGMET for this cloud.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity can resume quickly and with little warning. Eruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E10,000 ft. above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ELow level ash cloud drifting south from the summit. Main eruption cloud detached 60\u2013280 mi (100 and 450 km) to the south, see current NWS SIGMET.\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Low level ash cloud continues. Aviation Color Code\/Volcano Alert Level redued to ORANGE\/WATCh","sentUtc":"2023-07-18","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-18T11:37:08-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-18T11:37:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-18T11:37:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230718\/1637Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1083\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn ash cloud with an initial height of around 30,000 ft. (7 km) above sea level from Shishaldin volcano began at 7:00 am AKDT (15:00 UTC) and is drifting SSE. The eruption is continuing and recent pilot observations estimated a 24,000 ft. (6 km) above sea level height. The aviation Color Code remains at RED and the Volcano Alert Level at WARNING. The National Weather Service has issued a SIGMET for this activity.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptive activity began increasing overnight starting around 1 am AKDT (09:00 UTC) with increased lava eruption from or within the summit crater but no significant ash emissions. Activity was detected on regional infrasound arrays, increasing seismic tremor, and elevated surface temperatures in satellite data. Overnight webcam images confirmed glowing from the summit with only minor ash emission.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past.  These can occur with little warning. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E30,000 ft. above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESSE Drifting ash cloud seen in satellite imagery, see current NWS SIGMET\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ash plume from Shishaldin Volcano estimated at 30,000 ft. asl, drifting south. Aviation Color Code\/Volcano Alert Level remains at RED\/WARNING","sentUtc":"2023-07-18","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-18T08:22:54-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-18T08:22:54-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-18T08:22:54-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230718\/1556Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1082\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe eruption of Shishaldin Volcano has intensified. A rapidly growing ash cloud was observed starting at 7:00 am AKDT (15:00 UTC) and drifting SSE. Cloud height is undertermined at this time and could be more than 20,000 ft. above sea level (6 km). In response, the aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING. The National Weather Service has issued a SIGMET for this activity.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptive activity began increasing overnight starting around 1 am AKDT (09:00 UTC) with increased lava eruption from or within the summit crater but no significant ash emissions. Activity was detected on regional infrasound arrays, increasing seismic tremor, and elevated surface temperatures in satellite data. Overnight webcam images confirmed glowing from the summit with only minor ash emission.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past.  These can occur with little warning. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eunknown at this time, appear to have rapid growth over 20,000 ft. asl\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESSE Drifting ash cloud seen in satellite imagery, see current NWS SIGMET\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Increased ash emissions detected at Shishaldin Volcano. Aviation Color Code\/Volcano Alert Level remain at RED\/WARNING","sentUtc":"2023-07-18","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-18T06:10:01-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-18T06:10:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-18T06:10:01-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230716\/1534Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ERED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1067\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity at Shishaldin Volcano has declined. Seismicity has significantly declined and no explosion signals are being detected in infrasound (pressure sensor) data. The drifting ash cloud from last night's activity is still visible in satellite imagery about 350 nautical miles ESE from the volcano. The NWS has a SIGMET for this cloud and estimate it to be under 16,000 ft (4.9 km) above sea level. In response to this decline in explosive activity, the Aviation Color Code is being reduced to ORANGE and the Volcano Alert Level is being raised to WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EExplosive eruptive activity can resume quickly and with little warning. Eruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone detected at the volcano, drifting ash cloud under 16,000 ft above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EESE Drifting ash cloud still seen in satellite imagery, see current NWS SIGMET\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Explosive eruptive activity has declined at Shishaldin Volcano. Aviation Color Code\/Volcano Alert Level reduced to ORANGE\/WATCH","sentUtc":"2023-07-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-16T07:00:17-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-16T07:00:17-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-16T07:00:17-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230716\/0757Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1066\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe explosive eruption of Shishaldin Volcano is continuing. A continuous ash plume now extends over 80 mi (125 km) to the SSE from the volcano with an altitude of about 16,000 ft (4.9 km) above sea level. Seismicity has remained elevated for over 6 hours and frequent explosion signals are being detected at regional infrasound (pressure sensor) networks. Some explosions are sending ash plumes as high as 20,000 ft (6 km) above sea level. Due to the duration of this current activity and the extent of the distributing ash cloud the Aviation Color Code is being raised to RED and the Volcano Alert Level is being raised to WARNING. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe recent magnitude 7.3 earthquake located 55 mi (89 km) SW of Sand Point is not related to volcanic activity.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past. These can occur with little warning. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eup to 20,000 feet above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EDrifting more than 80 mi (125 km) to the SSE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ash cloud extending over 80 mi (125 km) from Shishaldin. Aviation Color Code\/Volcano Alert Level  raised to RED\/WARNING.","sentUtc":"2023-07-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-15T22:58:38-08:00","colorCode":"RED","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-15T22:58:38-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-15T22:58:38-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230716\/0552Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1065\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe eruption of Shishaldin Volcano has intensified. An ash cloud to 15,000 ft  (4.6 km) above sea level and drifting to the SSE has been observed in satellite data starting at about 9:00 pm AKDT (17:00 UTC). The National Weather Service has issued a SIGMET for this activty.  Seismic tremor amplitudes began to increase starting around 5:00 pm AKDT (1:00 UTC) and are continuing.  The actvity has also been observed on regional infrasound (presure sensor) arrays. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past.  These can occur with little warning. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E15,000 feet above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EDrifting to the SSE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruption from Shishaldin intensified producing ash cloud to 15,000 ft asl. ","sentUtc":"2023-07-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-15T20:56:08-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-15T20:56:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-15T20:56:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230714\/1934Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1050\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA significant explosion occurred at 1:09 am AKDT (9:09 UTC) this morning and produced an ash cloud that initially reached 30,000 to 40,000 ft (9–12 km) above sea level and drifted south over the Pacific Ocean. A second smaller explosion occurred at 7:10 am AKDT (15:10 UTC) and reached ~15,000 ft (4.5 km) above sea level. The National Weather Service issued a SIGMET for these events and suggested a maximum cloud height of 25,000 ft (7.6 km) above sea level for the drifting ash cloud. Web camera images and pilot reports show continued low-level ash emissions this morning including a small ash cloud near the summit around 10:30 am AKDT (18:30 UTC).  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EEruptions from Shishaldin have produced minor and on occasion significant ash clouds in the past.  These can occur with little warning. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E15,000 feet above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Explosive events starting overnight and continuing.  Low-level drifting ash clouds present.","sentUtc":"2023-07-14","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-14T11:26:31-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-14T11:26:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-14T11:26:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230712\/2013Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1035\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EStrongly elevated surface temperatures continue to be observed at the summit of Shishaldin Volcano in satellite data. Incandescence at the summit was observed in web camera images from last night and sulfur dioxide was detected in satellite data over the past day. In addition, seismic tremor amplitudes have increased over the past day. Together, these observations suggest that lava is likely present within the summit crater of Shishaldin. In response, the Alaska Volcano Observatory is raising the Aviation Color Code to ORANGE and the Alert Level to WATCH.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Strongly elevated surface temperatures, SO2 detected, seismic tremor and incandescence seen in webcam - color code\/alert level raised to ORANGE\/WATCH. ","sentUtc":"2023-07-12","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-12T11:00:19-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-12T11:00:19-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-12T11:00:19-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230711\/2239Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A1034\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EStrongly elevated surface temperatures at the summit of Shishaldin Volcano have been observed in satellite data over the past day. Intermittent tremor and low-frequency earthquakes over the past week have gradually become more regular and consistent in the past day. In response, the Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY. These observations represent a departure from normal background activity at Shishaldin, but do not necessarily indicate that an eruption will occur. Shishaldin is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. The local monitoring network is partially impaired, therefore AVO is also using nearby geophysical networks, satellite data and regional infrasound and lighting data to detect activity. AVO will continue to closely monitor unrest at Shishaldin Volcano.\u003Cbr \/\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 26 confirmed eruptions since 1824. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS kwallace@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"AVO Shishaldin YELLOW\/ADVISORY - Strongly elevated surface temperatures and seismic tremor observed. Color code raised to YELLOW\/ADVISORY.","sentUtc":"2023-07-11","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2023-07-11T13:14:15-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-07-11T13:14:15-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-07-11T13:14:15-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230606\/0343Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EIliamna (VNUM #313020)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A816\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 60 deg 1 min W 153 deg 5 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECook Inlet-South Central\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E10016 ft (3053 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EPreviously reported earthquake activity culminated in an ice-rock avalanche slightly before 5:14 pm AKDT this evening (1:14 June 6, 2023 UTC). Although we lack visual confirmation at this time, the seismic signals recorded match historic observations of avalanches associated with Red Glacier on Iliamna Volcano’s eastern flank. Seismicity has since declined to background levels. The Aviation Color Code and Volcano Alert Level is therefore being lowered to GREEN and NORMAL.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EIliamna Volcano is located on the western side of lower Cook Inlet in the Lake Clark National Park. Iliamna is a snow-covered stratovolcano which rises 10,020 feet above sea level. Although steam plumes occur on its eastern flanks, there has been no historic volcanic activity at Iliamna. Iliamna is located 225 km (140 miles) southwest of Anchorage and 113 km (70 miles) southwest of Homer.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS awech@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ice-rock avalanche signal observed in seismic data. Seismicity has returned to background. ","sentUtc":"2023-06-06","obs":"avo","vName":"Iliamna","vnum":"313020","noticeId":"DOI-USGS-AVO-2023-06-05T19:12:27-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-06-05T19:12:27-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-06-05T19:12:27-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230606\/0053Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EIliamna (VNUM #313020)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A815\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 60 deg 1 min W 153 deg 5 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECook Inlet-South Central\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E10016 ft (3053 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAn increase in seismicity has been observed at Iliamna volcano beginning at about 12:00 pm AKDT June 5, 2023 (20:00 UTC). The rate of earthquakes initially occurred in 1 minute intervals and have been becoming more closely spaced. There is a possibility that the earthquakes may be related to magmatic movement or hydrothermal fluids beneath the volcano. However, similar activity has been observed before large mass movements or avalanches at Iliamna volcano, and AVO cannot rule out either possibility at this time.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDue to the seismicity at Iliamna being above background levels the Aviation Color Code and Volcano Alert level for Iliamna are being raised to YELLOW and ADVISORY.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EIliamna volcano is located on the western side of lower Cook Inlet in the Lake Clark National Park. Iliamna is a snow-covered stratovolcano which rises 10,020 feet above sea level. Although steam plumes occur on its eastern flanks, there has been no historic volcanic activity at Iliamna. Iliamna is located 225 km (140 miles) southwest of Anchorage and 113 km (70 miles) southwest of Homer.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS awech@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Increase in seismciity observed.  ","sentUtc":"2023-06-06","obs":"avo","vName":"Iliamna","vnum":"313020","noticeId":"DOI-USGS-AVO-2023-06-05T16:34:50-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-06-05T16:34:50-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-06-05T16:34:50-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230517\/2125Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A694\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe level of eruptive activity at Semisopochnoi has declined in the past week. The last evidence of ash emissions from the volcano was observed on May 5 and consisted of a light dusting of ash on the northwest flank of Mount Young. The Aviation Color Code and Volcano Alert Level are being lowered to YELLOW\/ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Young and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and more ash-producing events could occur again with little warning.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Young, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Eruptive activity has declined. Aviation Color Code and Volcano Alert Level lowered to YELLOW\/ADVISORY.  ","sentUtc":"2023-05-17","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2023-05-17T09:32:50-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-05-17T09:32:50-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-05-17T09:32:50-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230319\/2047Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A340\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ELow-level ash emissions from the north crater of Mount Young at Semisopochnoi were observed in several web camera images over the past day. In addition, small explosions and volcanic tremor have resumed during the same time period. Ash emissions have not been detected in satellite data, although a vapor plume extending 150 km (90 miles) from Mount Young was observed yesterday in satellite data. This activity is similar to eruptive activity observed intermittently over the last few years at Semisopochnoi. The Aviation Color Code and Volcano Alert Level are being raised to ORANGE\/WATCH.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and more ash-producing events could occur again with little warning.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3000 ft\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eash\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Young, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Low-level ash emissions in web camera; small explosions and seismic unrest. Aviation Color Code and Volcano Alert Level raised to ORANGE\/WATCH ","sentUtc":"2023-03-19","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2023-03-19T12:37:42-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-03-19T12:37:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-03-19T12:37:42-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230316\/1840Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETanaga (VNUM #311080)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A314\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 53 min W 178 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5925 ft (1806 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEarthquake activity near Tanaga Volcano has decreased in both rate and magnitude from the peak of the swarm on March 9 – 11. The significant decline in earthquake activity decreases the potential for an eruption at the volcano. No other signs of unrest have been detected in other monitoring data. AVO is therefore lower the Aviation Color Code to Yellow and the Volcano Alert Level to ADVISORY. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic activity has also declined at Takawangha volcano, which is about 8 km (5 miles) east of Tanaga Volcano on Tanaga Island. The Aviation Color Code\/Alert Level has also been lowered to YELLOW\/ADVISORY for Takawangha. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO continues to monitor the activity closely and seismic analysts are locating events as time permits. Earthquakes are occurring under Tanaga Island at a rate of up to several per minute. The largest event over the past 24 hours was a M3.1 located between Takawangha volcano and Tanaga Volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFor current monitoring data: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Tanaga.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Tanaga.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga Island lies in the Andreanof Islands approximately 100 km (62 miles) west of the community of Adak and 2025 km (1260 miles) SW of Anchorage. The northern half of the island is home to the Tanaga volcanic complex, comprising three main volcanic edifices. Tanaga Volcano is the tallest of these (1,806 m or 5,925 ft) and lies in the center of the complex. The last reported eruption of Tanaga occurred in 1914 and earlier eruptions were reported in 1763-1770, 1791, and 1829. Reports of these eruptions are vague, but deposits on the flanks of the volcano show that typical eruptions produce blocky lava flows and occasional ash clouds. Eruptions have occurred both from the summit vent and a 1,584 m (5,197 ft)-high satellite vent on the volcano's northeast flank. Immediately west of Tanaga volcano lies Sajaka, a 1,354 m (4,443 ft)-high compound edifice with an older cone to the east that collapsed into the sea within the last few thousand years, and a new cone that has grown in the breach. The new cone is 1,312 m (4,305 ft) high and consists of steeply dipping, interbedded cinders and thin, spatter-fed lava flows. To the east of Tanaga lies Takawangha, which is separated from the other active volcanic vents by a ridge of older rock. Takawangha's 1,449 m (4,754 ft)-high summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, and could produce localized debris avalanches. No historical eruptions are known from Sajaka or Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed only to Tanaga may instead have come from these other vents.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity decreasing and no other signs of unrest; likelihood of eruption declining.","sentUtc":"2023-03-16","obs":"avo","vName":"Tanaga","vnum":"311080","noticeId":"DOI-USGS-AVO-2023-03-16T10:08:01-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-03-16T10:08:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-03-16T10:08:01-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230316\/1839Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETakawangha (VNUM #311090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A315\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 52 min W 178 deg 1 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4754 ft (1449 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEarthquake activity near Takawangha volcano has decreased in both rate and magnitude from the peak of the swarm on March 9 – 11. The significant decline in earthquake activity decreases the potential for an eruption at the volcano. No other signs of unrest have been detected in other monitoring data. AVO is therefore lower the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic activity has also declined at Tanaga Volcano, which is about 8 km (5 miles) west of Takawangha on Tanaga Island. The Aviation Color Code\/Alert Level has also been lowered to YELLOW\/ADVISORY for Tanaga Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO continues to monitor the activity closely and seismic analysts are locating events as time permits. Earthquakes are occurring under Tanaga Island at a rate of up to several per minute. The largest event over the past 24 hours was a M3.1 located between Takawangha volcano and Tanaga Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFor current monitoring data: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Takawangha.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Takawangha.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is a remote, 1,449 m (4,754 ft)-high stratovolcano located on the northeast portion of Tanaga Island, roughly 95 km (59 miles) west of Adak in the Andreanof Islands. Takawangha's summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. Takawangha lies across a saddle from historically active Tanaga volcano to the west. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred, and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity decreasing and no other signs of unrest; likelihood of eruption declining.","sentUtc":"2023-03-16","obs":"avo","vName":"Takawangha","vnum":"311090","noticeId":"DOI-USGS-AVO-2023-03-16T10:11:29-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-03-16T10:11:29-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-03-16T10:11:29-08:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230310\/0222Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETakawangha (VNUM #311090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A225\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 52 min W 178 deg 1 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4754 ft (1449 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past 48 hours, earthquake activity near Takawangha volcano has been elevated and continues. This sustained activity indicates an increased potential for eruption at the volcano. Therefore AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic activity is also elevated at Tanaga Volcano, which is about 8 km (5 miles) west of Takawangha on Tanaga Island. If an eruption were to occur, it is uncertain at this stage if it would come from Takawangha or Tanaga. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO analysts continue to monitor the situation closely, and locate events as time permits. Earthquakes are occurring under Tanaga Island at a rate of up to several per minute. The largest event over the past 24 hours was a M3.9 located under Tanaga Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ENo eruptive activity or signs of unrest have been detected in satellite or other monitoring data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFor current monitoring data: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Takawangha.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Takawangha.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is a remote, 1,449 m (4,754 ft)-high stratovolcano located on the northeast portion of Tanaga Island, roughly 95 km (59 miles) west of Adak in the Andreanof Islands. Takawangha's summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. Takawangha lies across a saddle from historically active Tanaga volcano to the west. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred, and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity increased over past 2 days and continues; likelihood of eruption increased.","sentUtc":"2023-03-10","obs":"avo","vName":"Takawangha","vnum":"311090","noticeId":"DOI-USGS-AVO-2023-02-28T20:20:13-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-02-28T20:20:13-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-02-28T20:20:13-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230310\/0219Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETanaga (VNUM #311080)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A268\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 53 min W 178 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5925 ft (1806 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EOver the past 48 hours, earthquake activity near Tanaga Volcano has been elevated and continues. This sustained activity indicates an increased potential for eruption at the volcano. Therefore AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESeismic activity is also elevated at Takawangha volcano, which is about 8 km (5 miles) east of Tanaga on Tanaga Island. If an eruption were to occur, it is uncertain at this stage if it would come from Tanaga or Takawangha. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO analysts continue to monitor the situation closely, and locate events as time permits. Earthquakes are occurring under Tanaga Island at a rate of up to several per minute. The largest event over the past 24 hours was a M3.9 located under Tanaga Volcano. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ENo eruptive activity or signs of unrest have been detected in satellite or other monitoring data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EFor current monitoring data: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Tanaga.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Tanaga.php\u003C\/a\u003E\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga Island lies in the Andreanof Islands approximately 100 km (62 miles) west of the community of Adak and 2025 km (1260 miles) SW of Anchorage. The northern half of the island is home to the Tanaga volcanic complex, comprising three main volcanic edifices. Tanaga Volcano is the tallest of these (1,806 m or 5,925 ft) and lies in the center of the complex. The last reported eruption of Tanaga occurred in 1914 and earlier eruptions were reported in 1763-1770, 1791, and 1829. Reports of these eruptions are vague, but deposits on the flanks of the volcano show that typical eruptions produce blocky lava flows and occasional ash clouds. Eruptions have occurred both from the summit vent and a 1,584 m (5,197 ft)-high satellite vent on the volcano's northeast flank. Immediately west of Tanaga volcano lies Sajaka, a 1,354 m (4,443 ft)-high compound edifice with an older cone to the east that collapsed into the sea within the last few thousand years, and a new cone that has grown in the breach. The new cone is 1,312 m (4,305 ft) high and consists of steeply dipping, interbedded cinders and thin, spatter-fed lava flows. To the east of Tanaga lies Takawangha, which is separated from the other active volcanic vents by a ridge of older rock. Takawangha's 1,449 m (4,754 ft)-high summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, and could produce localized debris avalanches. No historical eruptions are known from Sajaka or Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed only to Tanaga may instead have come from these other vents.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity increased over past 2 days and continues; likelihood of eruption increased.","sentUtc":"2023-03-10","obs":"avo","vName":"Tanaga","vnum":"311080","noticeId":"DOI-USGS-AVO-2023-03-08T18:41:48-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-03-08T18:41:48-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-03-08T18:41:48-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230308\/0715Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETanaga (VNUM #311080)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A266\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 53 min W 178 deg 8 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5925 ft (1806 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEarthquake activity beneath Tanaga Volcano began to increase slowly starting at about 1:30 PM AKST today.  At roughly 8:45 PM AKST this evening, the activity escalated with earthquakes occurring as often as 2 or 3 each minute.  Initial locations of these earthquakes place them at shallow depths beneath the summit of Tanaga Volcano, and the largest of these earthquakes have magnitudes between 2 and 3. In response to this increase in seismicity, we are raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\u003Cbr \/\u003ETanaga Volcano is monitored with a local seismic and infrasound network, regional infrasound and lightning detection networks, and satellite data.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETanaga Island lies in the Andreanof Islands approximately 100 km (62 miles) west of the community of Adak and 2025 km (1260 miles) SW of Anchorage. The northern half of the island is home to the Tanaga volcanic complex, comprising three main volcanic edifices. Tanaga Volcano is the tallest of these (1,806 m or 5,925 ft) and lies in the center of the complex. The last reported eruption of Tanaga occurred in 1914 and earlier eruptions were reported in 1763-1770, 1791, and 1829. Reports of these eruptions are vague, but deposits on the flanks of the volcano show that typical eruptions produce blocky lava flows and occasional ash clouds. Eruptions have occurred both from the summit vent and a 1,584 m (5,197 ft)-high satellite vent on the volcano's northeast flank. Immediately west of Tanaga volcano lies Sajaka, a 1,354 m (4,443 ft)-high compound edifice with an older cone to the east that collapsed into the sea within the last few thousand years, and a new cone that has grown in the breach. The new cone is 1,312 m (4,305 ft) high and consists of steeply dipping, interbedded cinders and thin, spatter-fed lava flows. To the east of Tanaga lies Takawangha, which is separated from the other active volcanic vents by a ridge of older rock. Takawangha's 1,449 m (4,754 ft)-high summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, and could produce localized debris avalanches. No historical eruptions are known from Sajaka or Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed only to Tanaga may instead have come from these other vents.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 322-4085\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003E \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismic swarm beneath the volcano.","sentUtc":"2023-03-08","obs":"avo","vName":"Tanaga","vnum":"311080","noticeId":"DOI-USGS-AVO-2023-03-07T22:33:33-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-03-07T22:33:33-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-03-07T22:33:33-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230223\/0143Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAniakchak (VNUM #312090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A192\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 56 deg 54 min W 158 deg 12 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4400 ft (1341 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe number of earthquakes beneath Aniakchak volcano has recently increased and shifted to shallower depths. Due to this increase in seismic activity to above-background levels, the Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  There have been no signs of unrest in other monitoring data. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EBackground seismicity at Aniakchak has mostly been characterized by deep (>15 km or 9.3 miles), long-period events occurring at a rate of ~4 earthquakes per month. From October 2022 to present, the rate of earthquakes has been more elevated and characterized by shallower earthquakes at depths less than 9 km (5.6 miles) below sea level. The earthquake rate has further increased since January 31 with dozens of earthquakes detected per day, including a M3.7 earthquake on February 17. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThere is no indication that an eruption of Aniakchak is imminent, or that one will occur. Increases in seismic activity have been detected previously at other similar volcanoes, with no subsequent eruptions. We expect additional shallow seismicity and other signs of unrest, such as gas emissions, elevated surface temperatures, and surface deformation to precede any future eruption, if one were to occur. Should activity increase, AVO will issue further notices.   \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO monitors Aniakchak with a local network, which consists of six seismometers, a web camera, and a single infrasound sensor, as well as satellite remote sensing data and regional infrasound and lightning networks. To view current monitoring data, see \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Aniakchak.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Aniakchak.php\u003C\/a\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAniakchak volcano, located in the central portion of the Alaska Peninsula, consists of a stratovolcano edifice with a 10 km (6 mile) diameter summit caldera. The caldera-forming eruption occurred around 3,500 years ago. Postcaldera eruptions have produced lava domes, tuff cones, and larger spatter and scoria cone structures including Half-Cone and Vent Mountain all within the caldera. The most recent eruption occurred in 1931 and created a new vent and lava flows on the western caldera floor while spreading ash over much of southwestern Alaska. Aniakchak volcano is 25 km (15 miles) southeast of the nearest community, Port Heiden, and 670 km (416 miles) southwest of Anchorage, Alaska. \u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETársilo Girona, Acting Coordinating Scientist, UAFGI tarsilo.girona@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca target=\u0022_blank\u0022 href=\u0022https:\/\/gcc02.safelinks.protection.outlook.com\/?url=http%3A%2F%2Fwww.avo.alaska.edu%2F&data=05%7C01%7Chdietterich%40usgs.gov%7C4e428a02cf274911103408db150551b8%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C638126884815330179%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=mrKsTvh8yVAs%2FbGq6tQapOq6Q773zJjI9UTvyFMD7YE%3D&reserved=0\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake activity beneath Aniakchak volcano has increased; Aviation Color Code and Volcano Alert Level raised to YELLOW\/ADVISORY","sentUtc":"2023-02-23","obs":"avo","vName":"Aniakchak","vnum":"312090","noticeId":"DOI-USGS-AVO-2023-02-22T13:05:43-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-02-22T13:05:43-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-02-22T13:05:43-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230222\/1847Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETrident (VNUM #312160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A184\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 58 deg 14 min W 155 deg 6 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3599 ft (1097 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEarthquake activity beneath Trident Volcano has recently increased and is ongoing, although there have been no signs of unrest in other monitoring data. Due to this increase in seismic activity to above-background levels, the Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe current period of seismic unrest, or earthquake swarm, began on August 24, 2022. Earthquake depths at the beginning of the swarm were mostly deep, around 25 km (16 miles) below sea level, and became progressively shallower to around 5 km (3 miles) over the following four days. Since late August 2022, most earthquakes have been located in the shallow crust, with depths less than 6 km below sea level. Since January 1, 2023, earthquakes under Trident are occurring at an average rate of about ten per day. The largest event since August was a M4.6 quake on November 20, but most earthquakes are much smaller. A few episodes of weak seismic tremor and low frequency earthquakes have also occurred.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EWithin the Katmai group of volcanoes, earthquakes are typically clustered in three regions: under Trident Volcano, under Mount Katmai to the east, and under Martin and Mageik volcanoes to the west. The current period of seismic unrest is most prominent in the area under Trident, but the rate of earthquakes has also increased in the region beneath Martin and Mageik volcanoes. Because of the initial sequence of deep earthquakes and continued episodes of tremor under Trident, it is most likely, though not certain, that the unrest observed in the area is due to movement of magma or magmatic fluids at depth there. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThere is no indication that an eruption of Trident is imminent, or that one will occur. Increases in seismic activity have been detected previously at Trident and other similar volcanoes, with no subsequent eruptions. We expect additional shallow seismicity and other signs of unrest, such as gas emissions, elevated surface temperatures, and surface deformation to precede any future eruption, if one were to occur. Should activity increase, AVO will issue further notices.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EAVO monitors Trident with a local network of seismometers, a webcam, remote sensing data, and regional infrasound and lightning networks. To view current monitoring data, see \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Trident.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Trident.php\u003C\/a\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrident Volcano is one of the Katmai group of volcanoes located within Katmai National Park and Preserve on the Alaska Peninsula. Trident consists of a complex of four cones and numerous lava domes, all andesite and dacite in composition, that reach as high as 6,115 ft above sea level. An eruption beginning in 1953 constructed the newest cone, Southwest Trident, and four lava flows on the flank of the older complex. This eruption continued through 1974 and produced ash (an initial plume rose to 30,000 ft asl), bombs, and lava at various times. Fumaroles remain active on the summit of Southwest Trident and on the southeast flank of the oldest, central cone. Trident is located 148 km (92 miles) southeast of King Salmon and 440 km (273 miles) southwest of Anchorage.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETársilo Girona, Acting Coordinating Scientist, UAFGI tarsilo.girona@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity beneath Trident Volcano has increased; Aviation Color Code and Volcano Alert Level raised to YELLOW\/ADVISORY","sentUtc":"2023-02-22","obs":"avo","vName":"Trident","vnum":"312160","noticeId":"DOI-USGS-AVO-2023-02-21T07:56:14-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-02-21T07:56:14-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-02-21T07:56:14-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230222\/1847Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A188\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAlthough the active north cone of Mount Young continues to produce a robust steam plume, no ash emissions or explosive activity have been detected at Semisopochnoi volcano since late January. The level of seismic activity has also decreased, with no significant seismic tremor observed since January 25th. Thus, we are lowering the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Young, and ash clouds usually under 10,000 ft (3 km) above sea level, have characterized the recent activity at Semisopochnoi. More ash-producing events could occur again with little warning.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.  \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESteam only\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Young, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETársilo Girona, Acting Coordinating Scientist, UAFGI tarsilo.girona@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No ash emissions since January and declining seismicity. Aviation Color Code and Volcano Alert Level lowered to YELLOW\/ADVISORY","sentUtc":"2023-02-22","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2023-02-21T21:49:17-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-02-21T21:49:17-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-02-21T21:49:17-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230119\/2051Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EPavlof (VNUM #312030)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A84\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E8261 ft (2518 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEruptive activity at Pavlof Volcano has stopped. Seismicity has decreased to background levels, and no explosions have been detected since December 11, 2022.  Weakly elevated surface temperatures and minor steaming from the recently active vent continue to be observed intermittently in satellite and web camera imagery, consistent with cooling of previously erupted lava. Due to the decrease in activity to background levels, we are lowering the Aviation Color Code to Green and the Volcano Alert Level to Normal.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPrevious eruptions of Pavlof indicate that the level of unrest can change quickly and eruptive activity could resume with little or no warning.\u202fPavlof is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No eruptive activity since December 11. Monitoring data are at background levels. Aviation Color Code and Volcano Alert Level lowered to GREEN\/NORMAL.","sentUtc":"2023-01-19","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2023-01-19T10:04:24-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-01-19T10:04:24-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-01-19T10:04:24-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20230105\/2009Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ECleveland (VNUM #311240)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2023\/A21\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E5676 ft (1730 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA sustained reduction of volcanic unrest at Cleveland Volcano over the past few months has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY to UNASSIGNED\/UNASSIGNED.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EElevated surface temperatures and sulfur dioxide emissions prompted raising the Aviation Color Code and Volcano Alert Level from UNASSIGNED\/UNASSIGNED to YELLOW\/ADVISORY on May 11, 2022. This activity continued throughout the summer, but all signs of unrest have ceased or declined in recent months. Elevated surface temperatures in the summit crater are occasionally being observed but at reduced frequency and strength. Sulfur dioxide emissions have not been detected in satellite data since July 29, 2022. The last eruptive activity at Cleveland volcano was a short-lived explosion on the evening (local time) of June 1, 2020.\u003Cbr \/\u003E\u003Cbr \/\u003EDespite the current pause, the eruptive period at Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These occur without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano is monitored with a limited real-time seismic network. This smaller network inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level moved to UNASSIGNED\/UNASSIGNED due to a sustained reduction of volcanic unrest.","sentUtc":"2023-01-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2023-01-04T16:43:18-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2023-01-04T16:43:18-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2023-01-04T16:43:18-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20221228\/2046Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1518\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAsh emissions resumed over the past 24 hours at the active north crater of Mount Cerberus. Minor ash deposits on the flanks of Mount Cerberus were observed on fresh snow extending up to ~1 km (~1000 yards) from the vent in web camera images over the past day. No ash plumes have been observed in web camera or satellite imagery, but a persistent steam plume rising up to 5,000 ft above sea level from the active crater may now be carrying minor volcanic ash within it. The observation of ash deposits follows increased seismicity, including seismic tremor, in the past week. This activity is similar to eruptive activity observed over the past year at Semisopochnoi, but not since November 7. The Alaska Volcano Observatory is therefore raising the Aviation Color Code to ORANGE and Volcano Alert Level to WATCH. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and more ash-producing events could occur again with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003C5,000 ft\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Esteam and minor ash\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Cerberus, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Minor ash deposits observed in web camera images. Aviation Color Code and Volcano Alert Level raised to ORANGE\/WATCH.","sentUtc":"2022-12-28","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2022-12-27T21:14:33-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-12-27T21:14:33-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-12-27T21:14:33-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20221217\/2033Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EPavlof (VNUM #312030)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1462\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E8261 ft (2518 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EEruptive activity at Pavlof Volcano has paused. Although seismicity remains above background levels with intermittent seismic tremor, no explosions have been detected since December 7, 2022.  No elevated surface temperatures or incandescent lava have been observed in satellite and webcam images since December 2. Due to this decrease in activity, we are lowering the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPrevious eruptions of Pavlof indicate that the level of unrest can change quickly and eruptive activity could resume with little or no warning.\u202fPavlof is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No eruptive activity since December 7. Aviation Color Code and Volcano Alert Level lowered to YELLOW\/ADVISORY.","sentUtc":"2022-12-17","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2022-12-17T10:49:51-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-12-17T10:49:51-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-12-17T10:49:51-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20221123\/2130Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1337\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAlthough the active north cone of Mount Cerberus continues to produce a vapor plume and elevated seismicity, no ash emissions or explosive activity have been detected at Semisopochnoi volcano since November 7th. The level of seismic activity is still elevated but has decreased. Thus, we are lowering the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and more ash-producing events could occur again with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Cerberus, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EPavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No explosive activity since November 7th; Aviation Color Code and Volcano Alert Level lowered to YELLOW\/ADVISORY.","sentUtc":"2022-11-23","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2022-11-23T11:57:16-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-11-23T11:57:16-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-11-23T11:57:16-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20221119\/0134Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETakawangha (VNUM #311090)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1315\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 52 min W 178 deg 1 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E4754 ft (1449 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe number of small earthquakes detected near Takawangha volcano has increased over the past few days and has intensified over the past 24 hours. The earthquakes, the largest with magnitudes between 2 and 3, have preliminary depths of about 2 to 4 miles (3 to 6 km) below sea level. This activity may be due to the movement of magma beneath the volcano. It marks a departure from background activity and therefore AVO is raising the Aviation Color Code to YELLOW and Alert Level to ADVISORY for Takawangha volcano.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ENo eruptive activity has been detected in satellite or other monitoring data.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is monitored with a local seismic network, a single local infrasound sensor, regional infrasound and lightning sensors, and satellite imagery.  \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETakawangha is a remote, 1,449 m (4,754 ft)-high stratovolcano located on the northeast portion of Tanaga Island, roughly 95 km (59 miles) west of Adak in the Andreanof Islands. Takawangha's summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. Takawangha lies across a saddle from historically active Tanaga volcano to the west. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred, and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Ongoing earthquake swarm starting November 17.","sentUtc":"2022-11-19","obs":"avo","vName":"Takawangha","vnum":"311090","noticeId":"DOI-USGS-AVO-2022-11-18T14:14:09-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-11-18T14:14:09-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-11-18T14:14:09-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20221107\/2208Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1242\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ESmall explosions have been detected in geophysical data over the past week from the north crater of Mount Cerberus at Semisopochnoi. In addition, volcanic tremor has resumed during the same time period. Ash emissions have not been observed. However, the type of unrest we detected was associated with ash emissions during previous periods of unrest and, if occurring, such ash emissions are likely below 10,000 ft above sea level. These events are similar to eruptive activity observed over the last year at Semisopochnoi, but not since September 14. The Aviation Color Code and Volcano Alert Level are being raised to ORANGE\/WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and more ash-producing events could occur again with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eless than 10,000 ft. above sea level\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Cerberus, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS, kwallace@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Explosions and volcanic tremor detected with likely low-level ash emissions; Aviation Color Code and Volcano Alert Level raised to ORANGE\/WATCH.","sentUtc":"2022-11-07","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2022-10-31T16:43:09-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-10-31T16:43:09-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-10-31T16:43:09-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20221019\/2206Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETrident (VNUM #312160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1190\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 58 deg 14 min W 155 deg 6 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3599 ft (1097 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe swarm of earthquakes that began on August 24, 2022, beneath Trident Volcano has subsided and seismic tremor has not been observed since September 30, 2022. Occasional local earthquakes continue to be detected at background levels. Due to this decrease in activity and the absence of other signs of unrest, we are lowering the Aviation Color Code to GREEN and the Volcano Alert level to NORMAL.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShould activity increase, AVO will issue further notices. AVO monitors Trident with a local network of seismometers, a webcam, remote sensing data, and regional infrasound and lightning networks. To view current monitoring data, see \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Trident.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Trident.php\u003C\/a\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrident Volcano is one of the Katmai group of volcanoes located within Katmai National Park and Preserve on the Alaska Peninsula. Trident consists of a complex of four cones and numerous lava domes, all andesite and dacite in composition, that reach as high as 6,115 ft above sea level. An eruption beginning in 1953 constructed the newest cone, Southwest Trident, and four lava flows on the flank of the older complex. This eruption continued through 1974 and produced ash (an initial plume rose to 30,000 ft asl), bombs, and lava at various times. Fumaroles remain active on the summit of Southwest Trident and on the southeast flank of the oldest, central cone. Trident is located 148 km (92 miles) southeast of King Salmon and 440 km (273 miles) southwest of Anchorage.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity beneath Trident Volcano has subsided; Aviation Color Code and Volcano Alert Level lowered to GREEN\/NORMAL","sentUtc":"2022-10-19","obs":"avo","vName":"Trident","vnum":"312160","noticeId":"DOI-USGS-AVO-2022-10-19T13:26:24-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-10-19T13:26:24-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-10-19T13:26:24-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20220929\/2257Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1082\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EAlthough the active north cone of Mount Cerberus continues to produce a vapor plume and elevated seismic tremor, no ash emissions or explosive activity have been detected at Semisopochnoi volcano since September 14. The level of seismic activity is still elevated but has decreased. Thus, we are lowering the Aviation Color Code to YELLOW and Volcano Alert Level to ADVISORY. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity. More ash-producing events could occur again with little warning.\u202f \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The uninhabited island is part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak, Alaska. Semisopochnoi volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and several post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The north cone of Mount Cerberus, in the southwest part of the caldera, is the site of the current eruption, which began in 2018. The last known eruption prior to 2018 was in 1987 from Sugarloaf Peak on the south coast of the island.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Seismicity low; no ash emissions since September 14; Aviation Color Code and Volcano Alert Level lowered to YELLOW\/ADVISORY.","sentUtc":"2022-09-29","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2022-09-29T07:37:30-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-09-29T07:37:30-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-09-29T07:37:30-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20220929\/2256Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ETrident (VNUM #312160)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EGREEN\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1083\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 58 deg 14 min W 155 deg 6 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Peninsula\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E3599 ft (1097 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EThe swarm of earthquakes that began on August 24, 2022, beneath Trident volcano continues. In addition, episodes of weak seismic tremor and low frequency earthquakes have been detected since August 28. Together, these observations mean that Trident is exhibiting signs of elevated unrest above known background level. Therefore, we are raising the Aviation Color Code to YELLOW and the Volcano Alert level to ADVISORY. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDuring the current swarm, earthquake depths were initially mostly deep at around 25 km (16 miles) below sea level but became progressively shallower to around 5 km (3 miles) by August 28. Since then, earthquakes have mostly occurred 3 to 6 km (about 2 to 4 miles) below sea level, although some deeper events have been detected. Earthquake magnitudes (M) have ranged from M –0.7 to M 1.9. At the peak of the swarm, dozens of earthquakes occurred daily beneath the volcano, but earthquake rates have since decreased to just a few per day. No other signs of unrest have been detected in monitoring data. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EThe increase in seismic activity is likely caused by movement of magma or magmatic fluids. Increases in seismic activity have been detected previously at Trident and other similar volcanoes, with no subsequent eruptions. We expect additional shallow seismicity and other signs of unrest, such as gas emissions, elevated surface temperatures, and surface deformation to precede any future eruption, if one were to occur. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShould activity increase, AVO will issue further notices. AVO monitors Trident with a local network of seismometers, a webcam, remote sensing data, and regional infrasound and lightning networks. To view current monitoring data, see \u003Ca href=\u0022https:\/\/avo.alaska.edu\/activity\/Trident.php\u0022\u003Ehttps:\/\/avo.alaska.edu\/activity\/Trident.php\u003C\/a\u003E \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ETrident is one of the Katmai group of volcanoes located within Katmai National Park and Preserve on the Alaska Peninsula. Trident consists of a complex of four cones and numerous lava domes, all andesite and dacite in composition, that reach as high as 6,115 ft above sea level. An eruption beginning in 1953 constructed the newest cone, Southwest Trident, and four lava flows on the flank of the older complex. This eruption continued through 1974 and produced ash (an initial plume rose to 30,000 ft asl), bombs, and lava at various times. Fumaroles remain active on the summit of Southwest Trident and on the southeast flank of the oldest, central cone. Trident is located 148 km (92 miles) southeast of King Salmon and 440 km (273 miles) southwest of Anchorage.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at \u003Ca href=\u0022http:\/\/www.avo.alaska.edu\u0022\u003Ehttp:\/\/www.avo.alaska.edu\u003C\/a\u003E.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Earthquake swarm beneath Trident Volcano continues; Aviation Color Code and Volcano Alert Level raised to YELLOW\/ADVISORY","sentUtc":"2022-09-29","obs":"avo","vName":"Trident","vnum":"312160","noticeId":"DOI-USGS-AVO-2022-09-29T07:58:34-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-09-29T07:58:34-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-09-29T07:58:34-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20220920\/2040Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EShishaldin (VNUM #311360)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EUNASSIGNED\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A1045\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E9373 ft (2857 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ESeveral seismic stations in the Shishaldin network are now operating after being offline over the past year. Data from these stations have improved the Alaska Volcano Observatory's monitoring capability, and allows for location of small local earthquakes. Thus, the Aviation Color Code is now GREEN and the Volcano Alert Level NORMAL. The Alaska Volcano Observatory continues to monitor Shishaldin with the local seismic, infrasound, GPS, and tilt stations, web camera images, remote infrasound and lightning networks, and satellite images.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Prolonged data outage resolved. Aviation Color Code assigned at GREEN and Volcano Alert Level at NORMAL.","sentUtc":"2022-09-20","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2022-09-20T09:35:39-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-09-20T09:35:39-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-09-20T09:35:39-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20220821\/2301Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EYELLOW\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A927\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003EA short-lived explosion occured at 1:47 PM AKDT (21:47 UTC) today that produced ash emissions observed in local webcams. Ash emissions ceased by 2:16 PM AKDT (22:16 UTC). The ash plume was not visible above the meteorological clouds in satellite images, thus was below 20,000 ft. (6 km) above sea level. This event is similar to eruptive activity observed over the last year at Semisopochnoi, but not since June 12. The Aviation Color Code and Volcano Alert Level are being raised to ORANGE\/WATCH.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and more ash-producing events could occur again with little warning. \u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Eless than 20,000 ft. above sea level \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 378-5460\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"Explosion and ash plume below 20,000 ft asl observed; Aviation Color Code and Alert Level raised to ORANGE\/WATCH","sentUtc":"2022-08-21","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2022-08-21T14:43:19-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-08-21T14:43:19-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-08-21T14:43:19-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E.hans-td { padding: .25em; } .hans-paragraph { margin-top: 0; margin-bottom: 1em; }\u003C\/style\u003E\n            \u003Ctable\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 colspan=\u00222\u0022\u003E(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(20220708\/1703Z)\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESemisopochnoi (VNUM #311060)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EORANGE\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAlaska Volcano Observatory\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2022\/A744\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003EAleutians\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E2625 ft (800 m)\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\n                        \u003Cspan name=\u0022summary\u0022\u003E\n                            \u003Cp class=\u0022hans-paragraph\u0022\u003ENo ash emissions or explosive activity have been detected at Semisopochnoi since June 12. Seismic activity continues, but at low levels. Thus the Aviation Color Code and Volcano Alert Level are being lowered to YELLOW\/ADVISORY.  \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESteaming and sulfur dioxide emissions from the active north crater of Mount Cerberus continue.\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity and could begin again with little warning. \u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.\u003C\/p\u003E\n                        \u003C\/span\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003Enone since June 12, 2022\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003ESteam and sulfur dioxide emissions from the active north crater of Mount Cerberus continue\u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 322-4085\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n                \u003Ctr\u003E\n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E \n                    \u003Ctd class=\u0022hans-td\u0022 valign=\u0022top\u0022\u003E\u003Cp class=\u0022hans-paragraph\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/p\u003E\n                    \u003C\/td\u003E\n                \u003C\/tr\u003E\n            \u003C\/table\u003E","noticeSynopsis":"No ash emissions observed since June 12; Aviation Color Code and Alert Level lowered to YELLOW\/ADVISORY","sentUtc":"2022-07-08","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2022-07-07T12:24:20-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-07-07T12:24:20-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-07-07T12:24:20-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20220511\/0019Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2022\/A502\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003EElevated surface temperatures and sulfur dioxide emissions have been detected in satellite data over the past couple of days, representing a departure from background activity. AVO is increasing the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY. \u003C\/p\u003E\u003Cp\u003ECleveland volcano is monitored with a limited real-time seismic network. This smaller network inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. Eruptions from Cleaveland typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003C\/p\u003E\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cp\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.\u003C\/p\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497; Tarsilo Girona, Acting Coordinating Scientist, UAFGI tarsilo.girona@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level moved to YELLOW\/ADVISORY due to elevated surface temperatures and sulfur dioxide emissions.","sentUtc":"2022-05-11","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2022-05-10T09:24:12-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-05-10T09:24:12-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-05-10T09:24:12-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20220422\/0102Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof  (VNUM #311040)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2022\/A443\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 19 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1076 ft (328 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA swarm of earthquakes near Davidof volcano that began in late January 2022 has been in a slow decline over the past few weeks.   Thus, the Aviation Color Code and Alert Level are being decreased to UNASSIGNED\/UNASSIGNED.  AVO only assigns color code and alert level values to volcanoes that are sufficiently instrumented to allow us to understand the background state of activity.  The closest seismometers to Davidof are approximately 15 km to the east of the volcano on Little Sitkin Island, and are insufficient to allow us to confirm the volcano is at background. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA similar earthquake swarm occurred in December 2021.  No signs of unrest associated with either swarm have been observed in satellite images of the volcano.  The earthquake activity may be associated with volcanic unrest, or could be due to tectonic activity.      \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof volcano is a mostly submerged stratovolcano in the Rat Islands group in the western Aleutian Islands, about 350 km west of Adak. The subaerial part of the volcano comprises Davidof, Khvostof, Pyramid, and Lopy islands, which encircle Crater Bay, a 2.5 km diameter caldera. The islands are built up from interbedded lava flows and explosive deposits. The volcano has been sparsely studied, but visits by Alaska Volcano Observatory geologists in 2021 documented thick sequences of rhyolite to dacite pyroclastic flow and fall deposits that represent the most recent explosive eruptions. The age of these deposits is unknown, but they appear older than Holocene deposits from nearby Segula and Little Sitkin. There are no known historical eruptions from Davidof.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level changed to UNASSIGNED\/UNASSIGNED","sentUtc":"2022-04-22","obs":"avo","vName":"Davidof","vnum":"311040","noticeId":"DOI-USGS-AVO-2022-04-21T17:01:45-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-04-21T17:01:45-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-04-21T17:01:45-08:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20220422\/0059Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof  (VNUM #311040)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2022\/A434\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 19 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1076 ft (328 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA swarm of earthquakes near Davidof volcano that began in late January 2022 has been in a slow decline over the past few weeks.   Thus, the Aviation Color Code and Alert Level are being decreased to UNASSIGNED\/UNASSIGNED.  AVO only assigns color code and alert level values to volcanoes that are sufficiently instrumented to allow us to understand the background state of activity.  The closest seismometers to Davidof are approximately 15 km to the east of the volcano on Little Sitkin Island, and are insufficient to allow us to confirm the volcano is at background. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA similar earthquake swarm occurred in December 2021.  No signs of unrest associated with either swarm have been observed in satellite images of the volcano.  The earthquake activity may be associated with volcanic unrest, or could be due to tectonic activity.      \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof volcano is a mostly submerged stratovolcano in the Rat Islands group in the western Aleutian Islands, about 350 km west of Adak. The subaerial part of the volcano comprises Davidof, Khvostof, Pyramid, and Lopy islands, which encircle Crater Bay, a 2.5 km diameter caldera. The islands are built up from interbedded lava flows and explosive deposits. The volcano has been sparsely studied, but visits by Alaska Volcano Observatory geologists in 2021 documented thick sequences of rhyolite to dacite pyroclastic flow and fall deposits that represent the most recent explosive eruptions. The age of these deposits is unknown, but they appear older than Holocene deposits from nearby Segula and Little Sitkin. There are no known historical eruptions from Davidof.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu, (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level changed to UNASSIGNED\/UNASSIGNED","sentUtc":"2022-04-22","obs":"avo","vName":"Davidof","vnum":"311040","noticeId":"DOI-USGS-AVO-2022-04-19T15:20:26-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-04-19T15:20:26-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-04-19T15:20:26-08:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20220126\/1907Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof  (VNUM #311040)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2022\/A79\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 19 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1076 ft (328 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past two days a swarm of earthquakes has occurred in the vicinity of Davidof volcano. The largest earthquake in the current sequence happened yesterday at 4:02 PM AKST (January 26, 01:02 UTC) and had a magnitude of 4.9. A similar earthquake swarm occurred in December 2021. No signs of unrest have been observed in recent satellite images of the volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis earthquake activity may be associated with volcanic unrest, or could be due to regional tectonic activity. Due to the possibility of escalating volcanic unrest, AVO is raising the Aviation Color Code and Volcano Alert Level for Davidof to YELLOW\/ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO continues to monitor the situation with seismometers deployed on nearby islands since there is no real-time seismic monitoring network at Davidof volcano. The closest seismometers to Davidof are approximately 15 km to the east of the volcano on Little Sitkin Island.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof volcano is a mostly submerged stratovolcano in the Rat Islands group in the western Aleutian Islands, about 350 km west of Adak. The subaerial part of the volcano comprises Davidof, Khvostof, Pyramid, and Lopy islands, which encircle Crater Bay, a 2.5 km diameter caldera. The islands are built up from interbedded lava flows and explosive deposits. The volcano has been sparsely studied, but visits by Alaska Volcano Observatory geologists in 2021 documented thick sequences of rhyolite to dacite pyroclastic flow and fall deposits that represent the most recent explosive eruptions. The age of these deposits is unknown, but they appear older than Holocene deposits from nearby Segula and Little Sitkin. There are no known historical eruptions from Davidof.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov, (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF, dfee1@alaska.edu, (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level increased to YELLOW\/ADVISORY due to increased earthquake activity.","sentUtc":"2022-01-26","obs":"avo","vName":"Davidof","vnum":"311040","noticeId":"DOI-USGS-AVO-2022-01-26T08:51:50-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2022-01-26T08:51:50-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2022-01-26T08:51:50-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20211229\/2111Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof  (VNUM #311040)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A1184\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 19 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1076 ft (328 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe swarm of earthquakes that occurred in the vicinity of Davidof volcano beginning in early December has subsided. Thus, the Aviation Color Code and Alert Level is being decreased to UNASSIGNED\/UNASSIGNED. AVO only assigns color code and alert level values to volcanoes that are sufficiently instrumented to allow us to understand the background state of activity. The closest seismometers to Davidof are approximately 15 km to the east of the volcano on Little Sitkin Island, and are insufficient to allow us to assign specific alert levels. Thus, UNASSIGNED is used.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof volcano is a mostly submerged stratovolcano in the Rat Islands group in the western Aleutian Islands, about 350 km west of Adak. The subaerial part of the volcano comprises Davidof, Khvostof, Pyramid, and Lopy islands, which encircle Crater Bay, a 2.5 km diameter caldera. The islands are built up from interbedded lava flows and explosive deposits. The volcano has been sparsely studied, but visits by Alaska Volcano Observatory geologists in 2021 documented thick sequences of rhyolite to dacite pyroclastic flow and fall deposits that represent the most recent explosive eruptions. The age of these deposits is unknown, but they appear older than Holocene deposits from nearby Segula and Little Sitkin. There are no known historical eruptions from Davidof.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI, peizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level decreased to UNASSIGNED\/UNASSIGNED due to decreased earthquake activiity.","sentUtc":"2021-12-29","obs":"avo","vName":"Davidof","vnum":"311040","noticeId":"DOI-USGS-AVO-2021-12-29T11:34:06-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-12-29T11:34:06-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-12-29T11:34:06-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20211210\/2138Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof  (VNUM #311040)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A1108\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 19 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1076 ft (328 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past three days a swarm of earthquakes has occurred in the vicinity of Davidof volcano. The largest earthquake to date happened this morning at about 19:45 UTC (10:45 am AKST) and had a magnitude of 4.2. This swarm may be associated with volcanic unrest or it could also be due to regional tectonic activity. Due to the possibility of escalating volcanic unrest, AVO is raising the Aviation Color Code and Volcano Alert Level for Davidof to YELLOW\/ADVISORY. AVO is continuing to monitor the situation with seismometers deployed on nearby islands since there is no real-time seismic monitoring network at Davidof volcano. The closest seismometers to Davidof are approximately 15 km to the east of the volcano on Little Sitkin Island.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eno cloud present\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eno cloud present\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDavidof volcano is a mostly submerged stratovolcano in the Rat Islands group in the western Aleutian Islands, about 350 km west of Adak. The subaerial part of the volcano comprises Davidof, Khvostof, Pyramid, and Lopy islands, which encircle Crater Bay, a 2.5 km diameter caldera. The islands are built up from interbedded lava flows and explosive deposits. The volcano has been sparsely studied, but visits by Alaska Volcano Observatory geologists in 2021 documented thick sequences of rhyolite to dacite pyroclastic flow and fall deposits that represent the most recent explosive eruptions. The age of these deposits is unknown, but they appear older than Holocene deposits from nearby Segula and Little Sitkin. There are no known historical eruptions from Davidof.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF, dfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Swarm of earthquakes in vicinity of Davidof may be associated with volcanic unrest ","sentUtc":"2021-12-10","obs":"avo","vName":"Davidof","vnum":"311040","noticeId":"DOI-USGS-AVO-2021-12-10T12:22:29-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-12-10T12:22:29-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-12-10T12:22:29-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20211020\/2309Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A949\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Shishaldin Volcano monitoring network has several outages affecting local GPS, seismic, and infrasound stations that are likely to persist through the winter months. Due to the impaired local monitoring stations, the Alaska Volcano Observatory is changing the Aviation Color Code and the Volcano Alert Level to UNASSIGNED\/UNASSIGNED. \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory continues to monitor Shishaldin with seismic, GPS, and infrasound instruments on nearby networks, as well as with Cold Bay web camera imagery and satellite data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF, dfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Prolonged data outage; Alert Levels to UNASSIGNED\/UNASSIGNED","sentUtc":"2021-10-20","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2021-10-20T13:30:55-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-10-20T13:30:55-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-10-20T13:30:55-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20211020\/2304Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A950\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA sustained decline in volcanic unrest at Cleveland volcano over the past few months has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY to UNASSIGNED\/UNASSIGNED. \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nElevated seismicity, deformation within the summit crater, and thermal and gas emissions prompted raising the Aviation Color Code and Volcano Alert Level from UNASSIGNED\/UNASSIGNED to YELLOW\/ADVISORY on March 20, 2021. This activity continued over the summer, but all signs of unrest have ceased or declined in recent months. Elevated surface temperatures in the summit crater are still being observed at reduced frequency and strength. The last eruptive activity at Cleveland volcano was a short-lived explosion on the evening (local time) of June 1, 2020. \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nDespite the current pause, the eruptive period at Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These occur without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network. This smaller network inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft (6 km) above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF, dfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decline in seismic unrest, deformation, and thermal emissions; Alert levels to UNASSIGNED\/UNASSIGNED","sentUtc":"2021-10-20","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2021-10-20T13:41:59-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-10-20T13:41:59-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-10-20T13:41:59-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210921\/0412Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A817\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions from the ongoing eruption at Semisopochnoi continue at a decreased rate. Over the last few hours, activity has consisted of discrete explosions that occur about once an hour and produce small ash clouds that rise to 10,000 to 15,000 feet above sea level and are currently drifting to the northwest. This represents less significant ash emissions and we are therefore lowering the Aviation Color Code and Volcano Alert Level to ORANGE\/WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nActivity at Semisopochnoi remains elevated and ash emissions could increase again at any time. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease visit the NWS Alaska Aviation Weather Unit for current information about the volcanic ash cloud forecast. https:\/\/www.weather.gov\/aawu\/sigmets \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10,000 to 15,000 ft. asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESmall ash clouds are drifting NW\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF \u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions continue at a decreased rate; Aviation Color Code and Alert Level lowered to ORANGE\/WATCH","sentUtc":"2021-09-21","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-09-20T19:42:03-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-09-20T19:42:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-09-20T19:42:03-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210920\/1947Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A812\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions from the ongoing eruption at Semisopochnoi continue this morning. Satellite images show an ash cloud up to 10,000 to 15,000 feet above sea level and extending approximately 60 miles (100 km) to the northwest through 19:30 UTC. Explosions were detected throughout the night and into this morning. The Aviation Color Code and Volcano Alert level remain at RED\/WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory will continue to closely monitor all available data and provide updates as available.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease visit the NWS Alaska Aviation Weather Unit for current information about the volcanic ash cloud forecast. https:\/\/www.weather.gov\/aawu\/sigmets \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10,000 to 15,000 ft. asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh observed in satellite extending 60 miles to the NW\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF \u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions continue; Aviation color code and alert level remain at RED\/WARNING","sentUtc":"2021-09-20","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-09-20T10:52:22-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-09-20T10:52:22-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-09-20T10:52:22-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003Etd { padding: .25em; }\u003C\/style\u003E\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210920\/0558Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A811\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions from the ongoing eruption at Semisopochnoi have increased in frequency and intensity. Satellite images show an ash cloud at an estimated altitude of 15,000 ft. above sea level extending approximately 60 miles (100 km) to the southeast through 05:00 UTC. Explosions have been observed throughout the day and increased sulfur dioxide gas emissions have been observed in satellite data this afternoon. These observations represent an increase in eruptive activity and Aviation Color Code and Volcano Alert level are being increased to RED\/WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIncreasing high clouds over Semisopochnoi will likely obscure satellite views of ash emissions within the hour. Seismic and infrasound monitoring will continue to provide notice of ongoing explosive activity, however it cannot determine the height or extent of ash emissions. The Alaska Volcano Observatory will continue to closely monitor all available data. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease visit the NWS Alaska Aviation Weather Unit for current information about the volcanic ash cloud forecast. https:\/\/www.weather.gov\/aawu\/sigmets \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E15,000 ft. asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh and sulfur dioxide observed in satellite extending 60 miles to the SE\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF \u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level raised to RED\/WARNING due to increased ash emissions","sentUtc":"2021-09-20","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-09-19T20:52:01-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-09-19T20:52:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-09-19T20:52:01-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210827\/1724Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAtka volcanic complex  (VNUM #311160)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A710\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5030 ft (1533 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is lowering the Aviation Color Code and Alert Level at the Atka volcanic complex to GREEN\/NORMAL. On August 10, AVO detected an increase in small earthquakes, located between 6 and 2 km (4 and 1 miles) below sea level, about 5 km (3 miles) west of Kliuchef volcano within the Atka volcanic complex.. After several days of increased seismicity, the earthquake rate began to drop, and has subsequently returned to background levels.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPrevious alerts by the Alaska Volcano Observatory for unrest at the Atka volcanic complex have been for Korovin Volcano, the site of the most recent historical eruptions. The location of earthquakes, however, is not specific to Korovin and could be related to several other volcanic vents that are part of the Atka volcanic complex, including Mount Kliuchef.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory will continue to monitor the Atka volcanic complex for signs of volcanic activity. The area is monitored by local seismic and infrasound sensors, satellite data, and regional lightning detection instruments. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lowered Aviation Color Code and Alert Level to GREEN\/NORMAL following return to background seismic level","sentUtc":"2021-08-27","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2021-08-27T08:21:29-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-08-27T08:21:29-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-08-27T08:21:29-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210811\/2222Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAtka Volcanic Complex  (VNUM #311160)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A629\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 19 min W 174 deg 8 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5030 ft (1533 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is raising the Aviation Color Code and Alert Level at the Atka volcanic complex to YELLOW\/ADVISORY after detecting an increased number of small, shallow earthquakes over the past day. These earthquakes have been located 3 to 6 km (1.9 to 3.7 miles) deep and around 7 km (4.3 miles) southwest of Korovin Volcano. The earthquakes represent an increase from background seismic activity, but may not necessarily lead to an eruption. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPrevious alerts by the Alaska Volcano Observatory for unrest for the Atka volcanic complex have been for Korovin Volcano, the site of the most recent historical eruptions. The location of earthquakes, however, is not specific to Korovin and could be related to several other volcanic vents that are part of the Atka volcanic complex, including Mount Kliuchef.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory will continue to monitor the Atka volcanic complex for signs of volcanic activity. The area is monitored by local seismic and infrasound sensors, satellite data, and regional lightning detection instruments. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Raised Aviation Color Code and Alert Level to YELLOW\/WATCH following increased earthquake activity ","sentUtc":"2021-08-11","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2021-08-11T13:54:55-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-08-11T13:54:55-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-08-11T13:54:55-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210805\/1755Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A604\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EClear web camera views of Pavlof Volcano this morning indicate episodic low-level ash emissions are occurring. Intermittent bursts of ash from the summit are producing diffuse ash clouds that are rising just above the summit (summit elevation 8261 ft above sea level) and drifting southeast roughly 6 mi before dissipating. Seismic and infrasound data indicate that activity consists of occasional small explosions and tremor. The ash emissions indicate an active eruption in progress thus the Alaska Volcano Observatory is raising the Aviation Color Code and Alert Level to ORANGE\/WATCH.   \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions occurring; minor explosions detected.","sentUtc":"2021-08-05","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2021-08-05T09:00:57-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-08-05T09:00:57-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-08-05T09:00:57-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210731\/1819Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A592\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Semisopochnoi has increased in recent days with a marked increase in the past 8 hours.  Increased activity has also been detected on local infrasound stations, suggesting possible low-level (below 10,000 ft above sea level) emissions.  Due to this increase in activity, AVO is raising the Aviation Color Code to ORANGE and the Alert Level to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWhen occurring, small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of activity at Semisopochnoi.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level raised to ORANGE\/WATCH due to increase in seismicity.","sentUtc":"2021-07-31","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-07-31T09:38:40-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-31T09:38:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-31T09:38:40-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210728\/1933Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGareloi  (VNUM #311070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A569\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 47 min W 178 deg 47 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5161 ft (1573 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe increase in seismic activity observed in May and June, 2021 at Mount Gareloi (Gareloi volcano) has diminished. Because the level of seismic activity is now at background, AVO is returning the aviation color code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Gareloi, which makes up all of Gareloi Island, is a stratovolcano located in the Delarof Islands group of the Aleutian Islands, about 2,000 km (1,242 mi) west-southwest of Anchorage and about 150 km (93 mi) west of Adak, the westernmost community in Alaska. This small volcano is 10 \u00d7 8 km (6.2 \u00d7 5.0 mi) in diameter at its base with two summits, separated by a narrow saddle. The northern, slightly higher peak contains crater about 300 m (1,000 ft) across. The southern summit has a crater open to the south and a persistent degassing vent (fumarole) on its western rim. Gareloi has been one of the most active in the Aleutians since the 1740s, with 16 reports of eruptive activity at Gareloi since 1760. In 1929, its largest historical eruption produced sixteen small south- to southeast-trending craters that extend from the southern summit to the coast, as well as lava flows and pyroclastic deposits on the southeastern flank of the volcano. Eruptions of Gareloi commonly produce ash clouds and lava flows, and the primary hazard is airborne clouds of ash that could affect aircraft. Since seismic instruments were installed in 2003, they have detected small but consistent seismic signals from beneath Mount Gareloi\u2019s edifice.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Change in Alert Level to GREEN due to decrease in seismic activity.","sentUtc":"2021-07-28","obs":"avo","vName":"Gareloi","vnum":"311070","noticeId":"DOI-USGS-AVO-2021-07-27T09:37:17-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-27T09:37:17-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-27T09:37:17-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210723\/2225Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A553\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA satellite radar image from last night July 22, 9:32 PM local (July 23 05:32 UTC) shows a small ~50 m (~150 ft) diameter area of uplift in the center of the crater at Great Sitkin suggestive of rising magma near the surface. This lava dome-like feature appears to have been emplaced sometime between July 14 and 22.  As a result AVO is raising the the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. Seismicity has been at relatively low levels this week compared to last week and we suspect that the lava dome-like feature was emplaced last week. Moderately elevated surface temperatures consistent with this feature were observed in satellite data on July 22. Cloudy conditions have obscured views of the volcano by satellite most of the past week.  AVO will continue to closely monitor this new uplift feature.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe prognosis for eruptive activity is uncertain. Continued growth of the lava dome feature, additional explosive events, or a return to non-eruptive behaviors are all possible. AVO will report on significant changes and observations in monitoring data should they occur.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in Aviation Color Code and Alert Level to ORANGE\/WATCH based on evidence of new lava dome at the summit.","sentUtc":"2021-07-23","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-07-23T13:38:03-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-23T13:38:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-23T13:38:03-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210722\/0028Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A542\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EDue to a marked decline is seismicity and no evidence of explosive activity detected in satellite, seismic or infrasound data since July 12, AVO is decreasing the Aviation Color Code to YELLOW and the Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWhen occurring, small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of activity at Semisopochnoi.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, local web cameras, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level decreaed to YELLOW\/ADVISORY due to decline in seismicity and no evidence of explosive activity.","sentUtc":"2021-07-22","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-07-21T11:07:40-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-21T11:07:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-21T11:07:40-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210713\/0014Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A490\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EContinuous volcanic tremor (constant shaking) began to be observed at ~2000 UTC (12 pm AKDT) and continues through the present time. Ash emissions were visible in satellite data beginning around 2100 UTC (1 pm AKDT) to an altitude of less than 5,000 feet asl (based on wind direction). Satellite observations from yesterday afternoon showed a robust steam plume and sulfur dioxide gas emissions. These observations indicate an increase in unrest and the Aviation Color Code is being increased to ORANGE, and the Volcano Alert Level is being increased to WATCH. Additional ash emissions are probable, but not certain.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWhen occurring, small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of activity at Semisopochnoi.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELess than 5,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EObserved in GOES-17 satellite\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and alert level increased to Orange\/Watch due to seismic tremor and low-level ash emssions.","sentUtc":"2021-07-13","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-07-12T16:04:29-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-12T16:04:29-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-12T16:04:29-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210709\/1940Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A468\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity has increased at Pavlof Volcano over the past 16 hours and is characterized by tremor.  No eruptive activity or emissions from the summit have been observed.  The seismic activity represents an increase from background levels therefore the Alaska Volcano Observatory is raising the Aviation Color Code and Alert Level to YELLOW\/ADVISORY.  This does not mean that an eruption is likely or imminent. However, past eruptions of Pavlof occurred with little or no warning.     \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity has increased. No eruptive actvity observed.  ","sentUtc":"2021-07-09","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2021-07-09T10:51:31-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-09T10:51:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-09T10:51:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210708\/1838Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A463\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is moving the status of Veniaminof Volcano from UNASSIGNED\/UNASSIGNED to GREEN\/NORMAL.  Recent field operations were successful in restoring seismic stations on Veniaminof allowing AVO to resume monitoring potential activity at the volcano.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Geophysical stations restored.  Veniaminof returned to mionitored status.  ","sentUtc":"2021-07-08","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-07-07T15:04:51-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-07-07T15:04:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-07-07T15:04:51-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210616\/2159Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A374\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo ash emissions or explosions from Semisopochnoi have been detected in satellite or infrasound data since May 30, and the level of seismic activity has been relatively low. Satellite views over the past few weeks have detected elevated surface temperatures, and sulfur dioxide emissions were observed on several occasions, indicating continued volcanic unrest, but no recent ash deposits have been observed.  Because of the low level of seismicity and lack of significant explosive activity, AVO is lowering the Aviation Color Code and Volcano Alert Level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWhen occurring, small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of activity at Semisopochnoi.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by a local seismic and infrasound network, regional lightning and infrasound sensors, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No explosive activity has been observed since May 30, though sulfur dioxide emissions have been observed several times. Seismicity is at low levels.","sentUtc":"2021-06-16","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-06-16T09:52:40-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-06-16T09:52:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-06-16T09:52:40-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210608\/1743Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGareloi  (VNUM #311070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A338\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 47 min W 178 deg 47 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5161 ft (1573 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA slight increase in seismic activity was observed at Mount Gareloi (Gareloi volcano) on May 18, and beginning May 27 there has been a sustained increase in the rate and size of small volcanic earthquakes. Because the level of seismic activity is now above background, AVO is raising the aviation color code to YELLOW and the Volcano Alert Level to ADVISORY. There have been no other notable changes at the volcano in satellite data or web camera views. Sulfur dioxide gas was detected in satellite imagery from Gareloi over the past week and is consistent with measurements from the last several years. No activity was observed by an AVO field crew flying over the summit on May 23.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGareloi volcano persistently emits magmatic gases from a fumarole field on the south crater and commonly exhibits low-level seismic activity. These observations suggest the presence of shallow magma and potential interaction with a hydrothermal system. The current increase in seismicity likely reflects a change to the magmatic-hydrothermal system, but it is not clear that the likelihood of a volcanic eruption has increased. AVO will continue to monitor activity to determine if the recent changes are related to influx of new magma or other changes to the magma system.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Gareloi, which makes up all of Gareloi Island, is a stratovolcano located in the Delarof Islands group of the Aleutian Islands, about 2,000 km (1,242 mi) west-southwest of Anchorage and about 150 km (93 mi) west of Adak, the westernmost community in Alaska. This small volcano is 10 \u00d7 8 km (6.2 \u00d7 5.0 mi) in diameter at its base with two summits, separated by a narrow saddle. The northern, slightly higher peak contains crater about 300 m (1,000 ft) across. The southern summit has a crater open to the south and a persistent degassing vent (fumarole) on its western rim. Gareloi has been one of the most active in the Aleutians since the 1740s, with 16 reports of eruptive activity at Gareloi since 1760. In 1929, its largest historical eruption produced sixteen small south- to southeast-trending craters that extend from the southern summit to the coast, as well as lava flows and pyroclastic deposits on the southeastern flank of the volcano. Eruptions of Gareloi commonly produce ash clouds and lava flows, and the primary hazard is airborne clouds of ash that could affect aircraft. Since seismic instruments were installed in 2003, they have detected small but consistent seismic signals from beneath Mount Gareloi\u2019s edifice.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Change in Alert Level to YELLOW\/ADVISORY due to increase in earthquake activity.","sentUtc":"2021-06-08","obs":"avo","vName":"Gareloi","vnum":"311070","noticeId":"DOI-USGS-AVO-2021-06-07T11:37:57-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-06-07T11:37:57-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-06-07T11:37:57-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210527\/2058Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A307\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity has remained at low levels following the explosive event on May 25 (local time). Satellite observations showed very minor steaming and slightly elevated surface temperatures during breaks in the cloud cover yesterday afternoon.  Thus, the Aviation Color Code is being decreased to YELLOW and the Volcano Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe prognosis for renewed eruptive activity is uncertain. Additional explosive events, the eruption of lava, or a return to non-eruptive behaviors are all possible. AVO will report on significant changes and observations in monitoring data should they occur.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in Aviation Color Code and Alert level to YELLOW\/ADVISORY due to decreased activity.","sentUtc":"2021-05-27","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-05-27T12:44:01-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-27T12:44:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-27T12:44:01-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210527\/2013Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGareloi  (VNUM #311070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A303\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 47 min W 178 deg 47 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5161 ft (1573 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EData and communications from seismic stations at Gareloi were reestablished recently, allowing the Alaska Volcano Observatory to resume locating earthquakes and detecting unrest at this volcano. The aviation color code is now GREEN and the Volcano Alert Level is now designated as NORMAL. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Change in Alert Level to GREEN\/NORMAL due to renewed reception of seismic data.","sentUtc":"2021-05-27","obs":"avo","vName":"Gareloi","vnum":"311070","noticeId":"DOI-USGS-AVO-2021-05-27T12:06:14-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-27T12:06:14-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-27T12:06:14-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210526\/1631Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A299\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-duration (1-2 minutes) explosive eruption occurred at 21:04 AKDT Tuesday May 25 (5:04 UTC 26 May) and resulted in an ash cloud up to 15,000 ft asl. Since that explosion, seismicity has decreased and satellite images show no further ash emissions. Thus, AVO is  reducing the Aviation Color Code ORANGE and the Volcano Alert Level to WATCH. Additional explosive events are possible, but not certain. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe ash cloud from the initial explosive eruption is still visible in satellite images. See the NWS Alaska Aviation Weather Unit web page for current information. https:\/\/www.weather.gov\/aawu\/sigmets\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo current emissions\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDrifting ash cloud still visible in satellite data\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in Aviation Color Code and Alert level to ORANGE\/WATCH due to decreased actviity.","sentUtc":"2021-05-26","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-05-26T07:52:57-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-26T07:52:57-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-26T07:52:57-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210526\/0603Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A298\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-duration (1-2 minutes) explosive eruption began at 21:04 AKDT (5:04 UTC 26 May), resulting in an ash cloud up to 15,000 ft asl. Since that explosion, seismicity has decreased and satellite images show that the ash cloud has detached from the vent and is moving towards the east. Additional explosions are possible and the Aviation Color Code remains at RED and the Volcano Alert Level at WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E15,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDetached from the vent and moving east\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-duration explosive eruption began at 21:04 AKDT (5:04 UTC 26 May) ","sentUtc":"2021-05-26","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-05-25T21:52:32-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-25T21:52:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-25T21:52:32-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210526\/0530Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A297\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EExplosive eruption began at 21:04 AKDT (5:04 UTC 26 May) and is continuing, as confirmed by geophysical data and mariner observations. Initial mariner reports suggest the cloud is as high as 15,000 ft asl, but is still developing.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E15,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Estill developing\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption began at 21:04 AKDT (5:04 UTC 26 May) and is continuing. ","sentUtc":"2021-05-26","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-05-25T21:19:30-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-25T21:19:30-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-25T21:19:30-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210526\/0343Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A296\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past day, there has been an increase in local earthquake activity. These data indicate an increased potential for eruptive activity at Great Sitkin. AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nLast week, elevated surface temperatures and sulfur dioxide emissions were observed in satellite data, and robust steaming was observed by AVO field crews on Adak Island.    \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert Level change to ORANGE\/WATCH due to increase in unrest.","sentUtc":"2021-05-26","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-05-25T19:16:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-25T19:16:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-25T19:16:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210519\/0518Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A274\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeveral small explosions were detected in regional infrasound data earlier today and a small ash cloud was observed in a satellite image from 15:21 (23:21 UTC) on May 17.  As a result AVO is raising the Color Code to Orange and the Alert Level to Watch.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of recent activity at Semisopochnoi. Weather clouds up to 15,000 ft above sea level currently obscure the volcano. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eunknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESmall ash clouds are likely being generated during explosions and are likely under 10,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by satellite data, regional infrasound, and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosions detected in regional infrasound today and a small ash cloud observed in satellite imagery from May 17.","sentUtc":"2021-05-19","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-05-18T20:44:19-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-18T20:44:19-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-18T20:44:19-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210513\/0058Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUkinrek Maars  (VNUM #312131)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A249\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 57 deg 50 min W 156 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E299 ft (91 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECommunications with seismic stations in the Ukinrek Maars area have been reestablished allowing the Alaska Volcano Observatory to resume locating earthquakes and detecting unrest at these volcanoes.  The aviation color code is now GREEN and the Volcano Alert Level is now designated as NORMAL.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic stations are back on line.  ","sentUtc":"2021-05-13","obs":"avo","vName":"Ukinrek Maars","vnum":"312131","noticeId":"DOI-USGS-AVO-2021-05-11T16:23:04-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-11T16:23:04-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-11T16:23:04-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210513\/0058Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUgashik-Peulik  (VNUM #312130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A248\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 57 deg 45 min W 156 deg 22 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4836 ft (1474 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECommunications with seismic stations in the Ugashik\/Peulik area have been reestablished allowing the Alaska Volcano Observatory to resume locating earthquakes and detecting unrest at these volcanoes.  The aviation color code is now GREEN and the Volcano Alert Level is now designated as NORMAL.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Sesimic stations are back online.","sentUtc":"2021-05-13","obs":"avo","vName":"Ugashik-Peulik","vnum":"312130","noticeId":"DOI-USGS-AVO-2021-05-11T16:18:22-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-11T16:18:22-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-11T16:18:22-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210513\/0057Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A250\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated surface temperatures have been observed in satellite images of Great Sitkin Volcano beginning in January and detections have increased over the past two months.  Satellite detections of increased volcanic gas emissions have been observed beginning on May 10.  In addition, there has been a slight increase in local seismicity over the past two days.  These data indicate a potential for increased eruptive activity at Great Sitkin.  As a result, AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.      \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcanic gas emissions and elevated surface temepratures observed.  ","sentUtc":"2021-05-13","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2021-05-11T16:25:51-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-11T16:25:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-11T16:25:51-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210512\/2113Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A247\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo eruptive activity at Veniaminof has been observed in satellite or infrasound data since early April.  The Alaska Volcano Observatory is downgrading the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY to UNASSIGNED\/UNASSIGNED.  The UNASSIGNED status is a result of several seismic station outages impairing the ability of the AVO to assess seismic unrest at the volcano.  These stations may come back online as snowpack decreases.  Any eruptive activity or unrest may still be detected with the remaining seismic stations, in regional infrasound networks, through detection of lightning, and\/or monitoring of satellite images.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEruptive activity at Veniaminof usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity has ceased.","sentUtc":"2021-05-12","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-05-11T15:59:07-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-11T15:59:07-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-11T15:59:07-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210507\/1916Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A231\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo ash emissions or explosions from Semisopochnoi have been detected in satellite or infrasound data since April 26. Partly cloudy satellite views this week have shown no recent ash deposits or elevated surface temperatures, and only steam was observed within the north crater of Mount Cerberus. Sulfur dioxide emissions were observed this week on May 1 and 5, signifying continued volcanic unrest. AVO is therefore lowering the Aviation Color Code and Volcano Alert Level to YELLOW\/ADVISORY. AVO will continue to monitor activity at Semisopochnoi with satellite and regional infrasound data.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWhen occurring, small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of activity at Semisopochnoi.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by satellite data, regional infrasound, and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No eruptive activity detected since April 26; Color Code\/Alert Level lowered to YELLOW\/ADVISORY","sentUtc":"2021-05-07","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-05-07T10:38:14-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-05-07T10:38:14-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-05-07T10:38:14-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210422\/2148Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A188\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity at Semisopochnoi has gradually increased over the last 24 hours. Satellite views of the volcano show a continuous plume extending 50 miles (80 km) to the south at approximately 8000 feet a.m.s.l.  A regional infrasound array has detected this increase in activity.  The aviation color code and alert level remain at ORANGE\/WATCH; however, AVO will continue to monitor the activity with satellite and regional infrasound data.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the volcano and ash clouds under 10,000 ft above sea level are typical of activity at this volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8000 ft a.m.s.l.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eunknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by satellite data, regional infrasound, and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in eruptive activity over the last 24 hours.","sentUtc":"2021-04-22","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-04-22T13:05:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-22T13:05:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-22T13:05:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210421\/1854Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A181\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity at Veniaminof has declined in the past weeks with no emissions observed since the low-level ash emissions on April 5.  Seismicity has continued to decline, but remains above background levels.  Because of the diminished  activity, the Alaska Volcano Observatory is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY at Veniaminof volcano. AVO continues to monitor Veniaminof with a local seismic stations, remote infrasound and lightning networks, and satellite and webcam images.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEruptive activity at Veniaminof usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity has declined","sentUtc":"2021-04-21","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-04-21T10:27:54-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-21T10:27:54-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-21T10:27:54-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210420\/1935Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUkinrek Maars  (VNUM #312131)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A177\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 57 deg 50 min W 156 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E299 ft (91 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory can no longer seismically monitor Ukinrek-Maars because of seismic station outages. As a result, AVO is unable to assess seismic unrest at this volcano. Because it is no longer seismically monitored, AVO will move from volcano alert level NORMAL and aviation color code GREEN to \u0022UNASSIGNED.\u0022 Additional seismic stations may come back online this spring as snowpack decreases. Any eruptive activity or unrest may still be detected with the remaining seismic stations, in regional infrasound networks, through detection of lightning, and\/or monitoring of satellite images.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Loss of power to seismic stations prevents local seismic monitoring","sentUtc":"2021-04-20","obs":"avo","vName":"Ukinrek Maars","vnum":"312131","noticeId":"DOI-USGS-AVO-2021-04-20T11:23:52-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-20T11:23:52-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-20T11:23:52-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210420\/0022Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETanaga  (VNUM #311080)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A175\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 53 min W 178 deg 8 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5925 ft (1806 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECommunication with two seismic stations has been reestablished.  With four local seismic stations active, the Alaska Volcano Observatory can resume locating earthquakes and detect unrest at Tanaga. The Aviation Color Code is now GREEN and the Volcano Alert Level is now designated as NORMAL.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAny eruptive activity or unrest may also still be detected in regional infrasound networks, through detection of lightning, and\/or monitoring of satellite images. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nawech@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Recovery of seismic network","sentUtc":"2021-04-20","obs":"avo","vName":"Tanaga","vnum":"311080","noticeId":"DOI-USGS-AVO-2021-04-19T15:53:09-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-19T15:53:09-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-19T15:53:09-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210420\/0019Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUgashik-Peulik  (VNUM #312130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A176\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 57 deg 45 min W 156 deg 22 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4836 ft (1474 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory can no longer seismically monitor Ugashik-Peulik because of seismic station outages. As a result, AVO is unable to assess seismic unrest at this volcano.  Because it is no longer seismically monitored, AVO will move from volcano alert level NORMAL and aviation color code GREEN to \u0022UNASSIGNED.\u0022 Additional seismic stations may come back online this spring as snowpack decreases. Any eruptive activity or unrest may still be detected with the remaining seismic stations, in regional infrasound networks, through detection of lightning, and\/or monitoring of satellite images.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nawech@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Loss of power to seismic stations prevents local seismic monitoring","sentUtc":"2021-04-20","obs":"avo","vName":"Ugashik-Peulik","vnum":"312130","noticeId":"DOI-USGS-AVO-2021-04-19T16:00:39-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-19T16:00:39-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-19T16:00:39-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210417\/2049Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A165\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity at Semisopochnoi has declined over the last 24 hours. Satellite views of the volcano have been mostly obscured, but a recent clearing suggests activity has declined and no significant ash plume was observed. As a result, AVO is lowering the Color Code to ORANGE and the Alert Level to WATCH. It is likely that low-level eruptive activity continues and may not be detected by regional infrasound sensors or above the low clouds in satellite data. AVO will continue to monitor the situation.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the volcano and ash clouds under 10,000 ft above sea level are typical of activity at this volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eunknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eunknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by satellite data, regional infrasound, and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nawech@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decline in eruptive activity over the last 24 hours.","sentUtc":"2021-04-17","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-04-16T12:45:30-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-16T12:45:30-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-16T12:45:30-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210416\/0315Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A161\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data suggests ash emissions from Semisopochnoi volcano have been ongoing since early this morning and are continuing with no decrease in intensity.  The ash cloud extends more than 217 mi (350 km) southeast of the volcano with heights up to 20,000 feet (6 km) above sea level.  Based on the length and height of the ash plume and sustained nature of ash emissions, AVO is raising the Color Code to RED and the Alert Level to WARNING.  AVO will continue to monitor the situation.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000  feet above sea level or less.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EContinuous ash cloud extends more than 350 km from volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by satellite data, regional infrasound, and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nawech@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Sustained ash eruption with plume extending SE more than 350 km and 20,000 ft asl","sentUtc":"2021-04-16","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-04-15T19:01:24-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-15T19:01:24-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-15T19:01:24-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210416\/0024Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A160\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data suggests ash emissions from Semisopochnoi volcano have been ongoing since early this morning and are continuing.  The ash cloud extends up to 217 mi (350 km) southeast of the volcano with heights up to 20,000 feet (6 km) above sea level.  Based on the length and height of the ash plume and ongoing nature of ash emissions, AVO is issuing this update; the Color Code\/Alert Level remains at ORANGE\/WATCH.  AVO will continue to monitor the situation.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000  feet above sea level. or less.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Econtinuous ash cloud extends 350 km from volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored by satellite data, regional infrasound, and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAaron Wech, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nawech@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ongoing ash emissions with plume extending SE up to 350 km and 20,000 ft asl","sentUtc":"2021-04-16","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-04-15T15:49:32-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-15T15:49:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-15T15:49:32-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210405\/2023Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A126\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELikely low-level ash emissions were observed in web camera views of the summit. Seismic activity remains elevated.  Because of the renewed activity, AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH at Veniaminof volcano. The Alaska Volcano Observatory continues to monitor Veniaminof with a local seismic network, remote infrasound and lightning networks, and satellite and webcam images.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEruptive activity at Veniaminof usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10000 feet A.M.S.L.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Likely low-level ash emissions observed at summit","sentUtc":"2021-04-05","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-04-05T11:08:31-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-05T11:08:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-05T11:08:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210402\/1735Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A109\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeveral seismic stations in the Shishaldin network are now operating after being offline for many months this winter. Data from these stations have improved the Alaska Volcano Observatory's monitoring capability, and allows for location of small local earthquakes, thus the Aviation Color Code is now GREEN and the Volcano Alert Level NORMAL. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory continues to monitor Shishaldin with the local seismic, GPS, and tilt stations, web camera imagery, remote infrasound and lightning networks, and satellite images.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatthew Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in Alert Levels to UNASSIGNED\/UNASSIGNED","sentUtc":"2021-04-02","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2021-03-30T17:14:32-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-03-30T17:14:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-03-30T17:14:32-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210402\/1733Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A116\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Veniaminof that started in late February 2021 appears to have paused. No ash emissions or steam plumes were visible during clear weather conditions on April 1. Elevated surface temperatures continue to be detected in satellite images, but are consistent with heat from recently erupted and now cooling lava flows. No significant seismicity or infrasound has been detected in the last 4 days. As a result, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY at Veniaminof volcano. Pauses in eruptions are common, and lava flows and eruption of minor ash plumes could resume suddenly with little or no warning. The Alaska Volcano Observatory continues to monitor Veniaminof with a local seismic network, remote infrasound and lightning networks, and satellite and webcam images.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEruptive activity at Veniaminof usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatthew Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity no longer detected.","sentUtc":"2021-04-02","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-04-01T21:16:15-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-04-01T21:16:15-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-04-01T21:16:15-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210331\/1822Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETanaga  (VNUM #311080)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A108\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 53 min W 178 deg 8 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5925 ft (1806 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELow power likely due to snow cover has resulted in loss of operation and communication with all but two seismic stations on Tanaga. As a result, the Alaska Volcano Observatory can no longer locate earthquakes that could indicate unrest at Tanaga, and the Aviation Color Code and the Volcano Alert Level are now designated as UNASSIGNED. Additional seismic stations may come back online this spring as snowpack decreases. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAny eruptive activity or unrest may still be detected with the remaining seismic stations, in regional infrasound networks, through detection of lightning, and\/or monitoring of satellite images. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatthew Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Partial loss of seismic network due to due to snow cover","sentUtc":"2021-03-31","obs":"avo","vName":"Tanaga","vnum":"311080","noticeId":"DOI-USGS-AVO-2021-03-30T17:06:50-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-03-30T17:06:50-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-03-30T17:06:50-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210331\/1821Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGareloi  (VNUM #311070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A107\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 47 min W 178 deg 47 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5161 ft (1573 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELow power likely due to snow cover has resulted in loss of operation and communication with all seismic stations on Gareloi. As a result, the Alaska Volcano Observatory can no longer locate earthquakes or detect seismic signals that could indicate unrest at Gareloi volcano, and the Aviation Color Code and the Volcano Alert Level are now designated as UNASSIGNED. Seismic stations may come back online this spring as snowpack decreases. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAny eruptive activity may still be detected, although with some delay, with regional infrasound networks, detection of lightning, and monitoring of satellite images. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatthew Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic network offline due to loss of power from snow cover","sentUtc":"2021-03-31","obs":"avo","vName":"Gareloi","vnum":"311070","noticeId":"DOI-USGS-AVO-2021-03-30T16:55:15-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-03-30T16:55:15-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-03-30T16:55:15-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210320\/2144Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A75\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite detections of increased volcanic gas emissions and elevated surface temperatures have been observed at Cleveland Volcano beginning on March 17, 2020.  In addition, a local earthquake occurred on March 10 and it was large enough to be measured on seismometers 100 km away on Umnak Island.  These data indicate a potential for increased eruptive activity at Cleveland.  As a result, AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.   \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland last erupted on June 2, 2020 AKDT (June 1, 2020 UTC) producing a small ash cloud to 22,000 ft.  Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland Volcano is monitored with a limited real-time seismic network. This smaller network inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption.   Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatthew Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased volcnaic gas emissions observed.  ","sentUtc":"2021-03-20","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2021-03-20T12:54:37-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-03-20T12:54:37-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-03-20T12:54:37-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210319\/1346Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A70\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERegional infrasound sensors detected a small explosion from Semisopochnoi volcano this morning at 11:50 UTC (03:50 AKDT), indicating an increase in eruptive activity.  As a result, AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.  Cloudy weather conditions are obscuring satellite views of the volcano. It is unknown if the explosion produced a low-level ash cloud or local ash deposit.       \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September 2018. Local seismic stations have been offline since November 11, 2020. New explosions could occur at anytime with no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatthew Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small explosion detected from Semisopocnoi in regional infrasound data.","sentUtc":"2021-03-19","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-03-19T05:08:27-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-03-19T05:08:27-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-03-19T05:08:27-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210304\/1804Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A39\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERegional infrasound sensors detected a small explosion from Veniaminof volcano this morning at 14:13 UTC (05:13 local time). Satellite and webcam views indicate low-elevation (\u003C 10,000 ft asl) ash emissions heading in the SSE direction, and minor ash deposits are visible at the volcano. As a result, AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH at Veniaminof volcano. The local seismic data remains offline due to an outage of a satellite link at Port Heiden. However, the Alaska Volcano Observatory continues to monitor Veniaminof with satellite and webcam data and remote infrasound, seismic and lightning networks.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEruptive activity usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10000 feet asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESSE direction\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small explosion and low-level ash emission in webcam and satellite data","sentUtc":"2021-03-04","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-03-04T08:44:23-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-03-04T08:44:23-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-03-04T08:44:23-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210219\/1828Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A24\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo significant volcanic activity has been detected at Semisopochnoi in satellite or regional infrasound data since February 6 and 7 when several small ash deposits were observed in satellite imagery. As  a result, the Alaska Volcano Observatory is decreasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September 2018. Local seismic stations have been offline since November 11, 2020. New explosions could occur at anytime with no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No significant activity observed in satellite and regional infrasound data.","sentUtc":"2021-02-19","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-02-17T12:26:20-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-02-17T12:26:20-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-02-17T12:26:20-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210208\/2311Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EHigh-resolution satellite imagery on February 7 shows a second small ash deposit extending at least 3 km to the northeast from North Cerberus Crater on Semisopochnoi Island, similar to the first observed on February 6. Clouds obscured views into the crater and the southern side of the volcano. Any ash clouds associated with these deposits have not been observed and are likely low-level (\u003C10,000 ft) and short-duration. Because of evidence for continued low-level ash emissions, the Alaska Volcano Observatory is increasing the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September 2018. Local seismic stations have been offline since November 11, 2020. New explosions could occur at anytime with no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite imagery shows continued, intermittent low-level ash emissions","sentUtc":"2021-02-08","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-02-08T13:41:46-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-02-08T13:41:46-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-02-08T13:41:46-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210207\/0451Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EHigh-resolution satellite images on February 6 showed a small ash deposit extending less than 3 km to the north from North Cerebus Crater on Semisopochnoi Island. Steam emissions obscured views into the crater. There is no evidence for continuing activity, but observation of a new deposit suggests renewed unrest, and the Alaska Volcano Observatory is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSmall eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September 2018, with the last detected activity in June 2020. Local seismic stations have been offline since November 11, 2020. New explosions could occur at anytime with no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite image shows small ash deposit from North Cerebus","sentUtc":"2021-02-07","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2021-02-06T19:14:40-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-02-06T19:14:40-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-02-06T19:14:40-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210115\/2134Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Shishaldin network has several outages affecting GPS, seismic, and infrasound stations.  Due to the impaired local monitoring stations, the Alaska Volcano Observatory is changing the Aviation Color Code and the Volcano Alert Level UNASSIGNED\/UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis most recent eruptive cycle at Shishaldin began in July 2019 with pauses in activity in late September\/early October 2019 and February 2020. The most recent activity in mid-March was confined to the summit crater except for minor ash deposits near the summit. Only minor rockfalls within the summit crater, not associated with eruptive activity, have been detected since early April. Pauses in eruptions are common at Shishaldin, and therefore eruptive activity could resume with little warning. The Alaska Volcano Observatory will continue to monitor the volcano closely.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory continues to monitor Shishaldin with the local web camera imagery, satellite data and remote infrasound, seismic and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nTaryn Lopez, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ntmlopez@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in Alert Levels to UNASSIGNED\/UNASSIGNED","sentUtc":"2021-01-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2021-01-15T11:49:56-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-01-15T11:49:56-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-01-15T11:49:56-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20210115\/2133Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2021\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EData from the Veniaminof seismic network have not been received since December 8, 2020 due in part to an outage of a satellite link to Port Heiden. Repair efforts are underway, however, due to the absence of local seismic monitoring, the Alaska Volcano Observatory is changing the Aviation Color Code and the Volcano Alert Level UNASSIGNED\/UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory continues to monitor Veniaminof with satellite data and remote infrasound, seismic and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nTaryn Lopez, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ntmlopez@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in Alert Levels to UNASSIGNED\/UNASSIGNED","sentUtc":"2021-01-15","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2021-01-15T11:32:53-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2021-01-15T11:32:53-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2021-01-15T11:32:53-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20201203\/2017Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKorovin  (VNUM #311161)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A1279\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 22 min W 174 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5030 ft (1533 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EUnrest at Korvin Volcano that began in late October 2020 has subsided. Seismic activity has returned to background levels and satellite observations over the past several weeks have shown no signs of unrest.  Thus, AVO is decreasing the Aviation Color Code and Alert Level to GREEN\/NORMAL. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nKorovin is monitored by local seismic and infrasound sensors, satellite data, regional lightning detection instruments, and reports from local residents. Observations of steaming are not unusual at Korovin and meteorological conditions can enhance its visibility.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Esteam from the summit crater is common\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKorovin Volcano is a 1553-m-high (5030 ft) stratovolcano located on the northern part of Atka Island in the central Aleutian Islands, about 21 km (13 mi) northwest of the community of Atka, 538 km (350 mi) west of Dutch Harbor, and 1760 km (1100 mi) southwest of Anchorage. The volcano has two distinct summit vents about 0.6 km (2000 ft) apart, that have been the sites of eruptive activity in historical time. The most recently active of the vents maintains a small, roiling, lake that occasionally produces energetic steam emissions. Thermal springs and fumaroles located on and near the volcano indicate an active hydrothermal system. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged from 4900 to 10,600 m (16,000 to 35,000 feet) above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nMatt Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in alert level. Volcano is at its background state.","sentUtc":"2020-12-03","obs":"avo","vName":"Korovin","vnum":"311161","noticeId":"DOI-USGS-AVO-2020-12-02T10:13:23-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-12-02T10:13:23-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-12-02T10:13:23-09:00","nvewsThreat":""},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20201120\/1900Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A1265\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo eruptive activity has been detected at Semisopochnoi since mid-June. Seismicity has persisted above background levels since that time, but had decreased to very low levels before a satellite link for transmitting seismic data failed on November 11, 2020. Since that time, no changes have been observed in satellite data, and no explosions have been detected from the Adak Island infrasound array. AVO is lowering the Aviation Color Code to UNASSIGNED and Alert Level to UNASSIGNED for Semisopochnoi due to the lack of evidence for ongoing unrest. Low-level seismic unrest may be continuing undetected. The satellite link is not likely to be reestablished without a site visit.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDespite the lack of eruptive activity since mid-June, Semisopochnoi has been in a state of unrest since September 2018, producing sporadic low-level explosions and elevated seismicity. Future small explosions may occur without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the erupting vent at North Cerberus. More significant ash emissions may be possible, but have not been observed during the 2018\u20132020 eruptive period.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe seismic monitoring network for Semisopochnoi has been offline since November 11, but if atmospheric conditions permit an infrasound array on Adak Island may detect explosion signals from Semisopochnoi with a 13 minute delay. Semisopochnoi is also monitored remotely with satellite observations and lightning sensors.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Low seismicity prior to network outage; no activity in satellite","sentUtc":"2020-11-20","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2020-11-19T22:29:17-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-11-19T22:29:17-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-11-19T22:29:17-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20201028\/1751Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKorovin  (VNUM #311161)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 22 min W 174 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5030 ft (1533 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EBased on recent satellite detections of significant sulfur dioxide emissions and an increase in seismicity to a level above background, AVO is raising the Aviation Color Code and Alert Level at Korovin Volcano to YELLOW\/ADVISORY.  Discrete earthquakes have been detected over the past two weeks and sulfur dioxide degassing has been detected four times in satellite data on October 15, 20 and 26.  Clear satellite views show no other signs of activity at this time.  AVO will continue to monitor the volcano for signs of volcanic activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nKorovin is monitored by local seismic and infrasound sensors, satellite data, and regional lightning detection instruments.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Esulfur dioxide emissions detected in satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKorovin Volcano is a 1553-m-high (5030 ft) stratovolcano located on the northern part of Atka Island in the central Aleutian Islands, about 21 km (13 mi) northwest of the community of Atka, 538 km (350 mi) west of Dutch Harbor, and 1760 km (1100 mi) southwest of Anchorage. The volcano has two distinct summit vents about 0.6 km (2000 ft) apart, that have been the sites of eruptive activity in historical time. The most recently active of the vents maintains a small, roiling, lake that occasionally produces energetic steam emissions. Thermal springs and fumaroles located on and near the volcano indicate an active hydrothermal system. Korovin has erupted several times in the past 200 years, including 1973, 1987, and 1998, and has likely had small ash emissions as recently as 2005. Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows. Reports of the height of the ash plume produced by the 1998 eruption ranged from 4900 to 10,600 m (16,000 to 35,000 feet) above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity above background levels and sulfur dioxide emissions.","sentUtc":"2020-10-28","obs":"avo","vName":"Korovin","vnum":"311161","noticeId":"DOI-USGS-AVO-2020-10-28T08:11:25-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-10-28T08:11:25-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-10-28T08:11:25-08:00","nvewsThreat":""},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20201021\/2321Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Great Sitkin has been steadily decreasing for the past several months and is now at background levels.  No eruptive activity or unusual surface temperatures have been observed in clear satellite imagery. The Alaska Volcano Observatory is returning the Aviation Color Code and Alert Level to GREEN\/NORMAL to reflect these background conditions.  AVO will continue to monitor the volcano using seismic, infrasound, web camera, and satellite observations.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert level lowered to GREEN\/NORMAL","sentUtc":"2020-10-21","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2020-10-21T12:08:08-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-10-21T12:08:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-10-21T12:08:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20201015\/2025Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWestdahl  (VNUM #311340)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 31 min W 164 deg 38 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5118 ft (1560 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory (AVO) has reestablished seismic monitoring instruments at Westdahl volcano and can now confidently monitor seismic unrest at the volcano. With renewed seismic monitoring, the volcano moves from UNASSIGNED to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to monitor seismic, satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic network operational; alert level changed to GREEN\/NORMAL","sentUtc":"2020-10-15","obs":"avo","vName":"Westdahl","vnum":"311340","noticeId":"DOI-USGS-AVO-2020-10-15T12:09:21-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-10-15T12:09:21-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-10-15T12:09:21-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20201014\/1754Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe periods of seismic tremor that prompted an increase in Pavlof's alert level on September 21 have not been observed in the last two weeks. No eruptive activity or unusual surface temperatures have been observed in clear satellite and web camera images. The Alaska Volcano Observatory is returning the Aviation Color Code and Alert Level to GREEN\/NORMAL to reflect these background conditions. Eruptions at Pavlof often occur with little or no precursory activity, and AVO will continue to monitor the volcano using seismic, infrasound, web camera, and satellite observations. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level lowered to GREEN\/NORMAL; seismicity at background","sentUtc":"2020-10-14","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2020-10-13T14:58:49-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-10-13T14:58:49-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-10-13T14:58:49-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200921\/2249Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity has increased at Pavlof over the past 24 hours and is characterized by ongoing tremor. No eruptive activity or emissions from the summit have been observed in cloudy satellite and web camera views. However, the seismic activity represents an increase from background levels and we are thus increasing the the Aviation Color Code and Alert Level to YELLOW\/ADVISORY. This does not mean that an eruption is likely or imminent. However, past eruptions of Pavlof occurred with little or no warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level raised to YELLOW\/ADVISORY based on elevated seismicity","sentUtc":"2020-09-21","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2020-09-21T14:30:11-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-09-21T14:30:11-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-09-21T14:30:11-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200908\/2152Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMakushin  (VNUM #311310)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 53 min W 166 deg 55 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5906 ft (1800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Makushin Volcano has been steadily declining for months, following an earthquake sequence that began on June 15, 2020. This earthquake sequence was focused within an area about 6 miles (10 km) east of the summit at a depth of about 5 miles (8 km). Current observations indicate seismic activity has returned to background levels, and thus the Aviation Color Code and the Volcano Alert Level are being decreased to GREEN\/NORMAL. Other data streams showed no signs of surface changes during the seismic sequence that started in June. The volcano is monitored with a network of seismic instruments, web camera, GPS, satellite data, and regional infrasound and lightning detection instruments. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMakushin volcano is located on northern Unalaska Island in the eastern Aleutian Islands. Makushin is a broad, ice-capped stratovolcano which rises to an elevation of 6680 feet. The summit caldera, 3 km diameter, is the site of frequent steam and minor ash eruptions; however, no large eruptions have occurred in this century. The community of Unalaska and port of Dutch Harbor are located 25 km (16 miles) east of Makushin volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Alert Level decreased to GREEN\/NORMAL.","sentUtc":"2020-09-08","obs":"avo","vName":"Makushin","vnum":"311310","noticeId":"DOI-USGS-AVO-2020-09-08T12:00:34-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-09-08T12:00:34-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-09-08T12:00:34-08:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200903\/0140Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA sustained pause in volcanic unrest at Cleveland Volcano over the last few months has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY to UNASSIGNED\/UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe last eruptive activity at Cleveland Volcano was a short-lived explosion on the evening (local time) of June 1, 2020. Since then, there has been no evidence from satellite observations of elevated surface temperatures, and there have been no observed changes in the summit crater.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDespite the current pause, the eruptive period at Cleveland, dating back to 2001, remains ongoing and future explosions are likely. These occur without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano, though more significant ash emissions are possible.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland Volcano is monitored with a limited real-time seismic network. This smaller network inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption, which results in it being designated as UNASSIGNED instead of the color code GREEN assigned to quiescent volcanoes with more instrumentation. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decreasing the Alert level to UNASSIGNED","sentUtc":"2020-09-03","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2020-09-02T11:49:16-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-09-02T11:49:16-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-09-02T11:49:16-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200820\/1939Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic tremor detected in June at Veniaminof has continued intermittently, but with decreasing frequency, and there have been no indications of surface change including increased temperatures or gas emissions. Tremor at Veniaminof in the past has sometimes preceded eruptions, but also can occur and persist for weeks to months and not result in an eruption. Current observations suggest activity has returned to near background, and thus the Aviation Color Code and the Volcano Alert Level are being decreased to GREEN\/NORMAL. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory continues to closely monitor Veniaminof with local seismic sensors, satellite data, web cameras, and remote infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nTaryn Lopez, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ntmlopez@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decrease in Alert Levels to GREEN\/NORMAL","sentUtc":"2020-08-20","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2020-08-19T12:46:01-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-08-19T12:46:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-08-19T12:46:01-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200618\/2201Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several days there have been periods of seismic tremor and occasional earthquakes at Veniaminof. This represents a departure from background activity. Thus, the Aviation Color Code and the Volcano Alert Level are being increased to YELLOW\/ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis type of seismic activity typically precedes eruptive activity at Veniaminof but does not mean that an eruption will occur. Eruptive activity usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nVeniaminof volcano is monitored by local seismic sensors, satellite data, web cameras, and remote infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in Alert Levels to YELLOW\/ADVISORY","sentUtc":"2020-06-18","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2020-06-18T13:22:39-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-06-18T13:22:39-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-06-18T13:22:39-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200617\/1956Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThere has been no sign of eruptive activity at Cleveland volcano since a short-lived explosion on the evening (local time) of June 1, 2020. Thus, the Aviation Color Code and Volcano Alert Level are being reduced to YELLOW\/ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland is almost always in a state of unrest and explosions will occur without warning. They typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano. Ash fall on the upper flanks of the volcano is also common. Flows of mud and\/or hot hot rock are generated in the drainages during some of these explosive events and can extend all the way to coast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe local geophysical stations and web camera at Cleveland are currently unavailable due to an ongoing network outage. Rapid detection of an ash-producing eruption may be possible using a combination of regional infrasound, lightning, and satellite data.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decreasing the Alert level to YELLOW\/ADVISORY","sentUtc":"2020-06-17","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2020-06-17T11:25:49-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-06-17T11:25:49-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-06-17T11:25:49-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200616\/0202Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMakushin  (VNUM #311310)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 53 min W 166 deg 55 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5906 ft (1800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several hours, there have been two earthquakes larger than magnitude 4 in the vicinity of Makushin Volcano. This represents a significant departure from background earthquake activity and may be associated with volcanic unrest. As a result the Aviation Color Code and Volcano Alert Level has been increased to YELLOW\/ADVISORY. This unrest could result a future eruption, however that is not a certainty. Aftershocks continue, as would be expected with earthquakes of this size.  The volcano is monitored with a network of seismic instruments, web camera, GPS, satellite data, and regional infrasound and lightning detection instruments. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud produced.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMakushin volcano is located on northern Unalaska Island in the eastern Aleutian Islands. Makushin is a broad, ice-capped stratovolcano which rises to an elevation of 6680 feet. The summit caldera, 3 km diameter, is the site of frequent steam and minor ash eruptions; however, no large eruptions have occurred in this century. The community of Unalaska and port of Dutch Harbor are located 25 km (16 miles) east of Makushin volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Alert Level increased to YELLOW\/ADVISORY.","sentUtc":"2020-06-16","obs":"avo","vName":"Makushin","vnum":"311310","noticeId":"DOI-USGS-AVO-2020-06-15T17:31:12-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-06-15T17:31:12-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-06-15T17:31:12-08:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200602\/0746Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERegional infrasound sensors recorded a small explosion today at about 06:32 UTC (10:32 AKST). No other significant activity was detected and local monitoring stations are offline. A small ash plume was observed at 22,000 ft drifting to the south.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E22,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDrifting to the south\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small explosion detected at 06:32 UTC. Raising the alert level to ORANGE\/WATCH.","sentUtc":"2020-06-02","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2020-06-01T23:26:43-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-06-01T23:26:43-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-06-01T23:26:43-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200507\/2337Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA sustained decline in volcanic unrest at Cleveland Volcano over the last several months has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW\/ADVISORY to UNASSIGNED\/UNASSIGNED.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe last explosive eruption at Cleveland occurred on January 9, 2019, and was followed by the extrusion of a small mound of lava in the summit crater. Since then, there has been an overall decrease in detected surface temperature and no observed changes in the summit crater.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland is one of the most active volcanoes of the Aleutian Arc, and the latest eruptive phase has waxed and waned almost annually since 2001. Local seismic, infrasound, and web camera data have been mostly unavailable for several weeks due to an equipment failure in a remote facility. Nonetheless, monitoring of Cleveland continues with regional seismic and infrasound stations on nearby islands. These, along with lightning and satellite data, should allow AVO to detect an ash-producing eruption, if one were to occur.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Sustained decrease in activity; Status dropped to UNASSIGNED","sentUtc":"2020-05-07","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2020-05-07T11:16:01-08:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-05-07T11:16:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-05-07T11:16:01-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200416\/1944Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Shishaldin Volcano has decreased over the past two weeks to levels slightly above background. Similarly, satellite views show no lava or changes within the crater since the start of April, accompanied by a decrease in surface temperatures. Eruptive activity therefore appears to have ended or paused. Due to this decrease in activity, the Alaska Volcano Observatory is decreasing the Aviation Color Code for Shishaldin Volcano to YELLOW and the Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEruptive activity at Shishaldin paused after the explosion on January 19, 2020, before resuming at a low level mid-March. It is therefore possible for eruptive activity to resume with little warning and AVO will continue to monitor the volcano closely.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite and geophysical data show no eruptive activity","sentUtc":"2020-04-16","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-04-16T09:07:51-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-04-16T09:07:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-04-16T09:07:51-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200401\/2016Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic, infrasound, and satellite data over the past two weeks have shown no signs of eruptive activity at Semisopochnoi. A robust steam plume and a crater lake have been seen in clear satellite images, but no recent ash deposits. Although seismic activity remains above background, it does not appear to be increasing towards an eruption in the short-term. Thus, AVO is reducing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. Unrest continues. Seismic activity persists and is characterized by occasional small earthquakes and satellite data show detectable volcanic gas (sulfur dioxide) being emitted from the volcano. Explosive activity could resume with little to no warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite data show no eruptive activity or ash deposits. Seismicity continues.","sentUtc":"2020-04-01","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2020-04-01T10:45:27-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-04-01T10:45:27-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-04-01T10:45:27-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200316\/0124Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity has been increasing the last few days at Semisopochnoi, and now is characterized by nearly continuous tremor and frequent small explosion signals. This represents a significant increase in activity and the Alaska Volcano Observatory is increasing the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. No significant ash emissions have been detected in satellite images; clouds cover much of the island to around 10,000 ft. asl.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small surface explosions detected in local seismic data; no ash detected.","sentUtc":"2020-03-16","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2020-03-15T16:57:21-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-03-15T16:57:21-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-03-15T16:57:21-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200315\/0631Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA high-resolution satellite image today shows lava and what appears to be a new cone within the Shishaldin summit crater. Weak seismic tremor has also been detected. Therefore the Aviation Color Code for Shishaldin Volcano is being raised to ORANGE and the Alert Level to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNo significant ash or lava signatures are apparent outside the summit crater at this time. Eruptive activity could increase with little or no warning resulting in lava flows outside of the crater, lahars, and low-level ash clouds. During the current eruptive cycle, larger ash clouds have also been produced. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite data show low-level eruption confined to summit crater. ","sentUtc":"2020-03-15","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-03-14T21:43:52-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-03-14T21:43:52-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-03-14T21:43:52-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200303\/1938Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several weeks seismic activity has decreased at Pavlof.  No eruptive activity or emissions from the summit have been observed since minor steam emissions in late February.  Since activity is now at background levels, we are decreasing the Aviation Color Code and Alert Level to GREEN\/NORMAL.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level lowered to GREEN\/NORMAL based on decreased seismic activity.","sentUtc":"2020-03-03","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2020-03-03T08:54:02-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-03-03T08:54:02-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-03-03T08:54:02-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200226\/2100Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWestdahl  (VNUM #311340)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 31 min W 164 deg 38 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5118 ft (1560 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several weeks the real-time seismic data stream at Westdahl volcano has ceased due to equipment problems in the field. Repairs are not feasible during the winter months. Without seismic data AVO cannot verify that the volcano is at its normal background state. Thus, the Aviation Color Code and Volcano Alert Levels are now UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlanned field work in April and during the summer will reestablish and improve the seismic monitoring network. At this time, rapid detection of an eruption (if one were to occur) may be possible using a combination of distant seismic and infrasound networks, lightning, and satellite data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert levels changed to UNASSIGNED due to lack of seismic data","sentUtc":"2020-02-26","obs":"avo","vName":"Westdahl","vnum":"311340","noticeId":"DOI-USGS-AVO-2020-02-26T10:18:54-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-02-26T10:18:54-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-02-26T10:18:54-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200226\/2059Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EHigh-resolution satellite data from yesterday afternoon shows no signs of eruptive activity or recent ash deposits at Semisopochnoi. Although seismic activity remains above background, it does not appear to be increasing towards an eruption in the short-term. Thus, AVO is reducing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nUnrest continues. Seismic activity persists and is characterized by short bursts of volcanic tremor and earthquakes. Explosive activity could resume with little to no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert level reduced to YELLOW\/ADVISORY","sentUtc":"2020-02-26","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2020-02-26T10:35:55-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-02-26T10:35:55-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-02-26T10:35:55-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200226\/2058Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past month, earthquake activity has increased at Great Sitkin Volcano and is now above background levels. Thus, AVO is increasing the Aviation Color Code to YELLOW and the Alert Level to ADVISORY. There has been no evidence of eruptive activity in geophysical data streams or in satellite observations. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert level raised to YELLOW\/ADVISORY","sentUtc":"2020-02-26","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2020-02-26T10:09:50-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-02-26T10:09:50-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-02-26T10:09:50-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200215\/0919Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA series of small explosions and tremor bursts have been detected in seismic data at Semisopochnoi over the past 7 hours and are continuing, representing a significant uptick in activity. No ash plumes have been observed, however low-level ash emissions may accompany these minor explosions. Any ash emissions may be currently obscured by cloud cover at ~10,000 ft. The Alaska Volcano Observatory is therefore raising the Aviation Color Code to ORANGE and the Alert Level to WATCH.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nTaryn Lopez, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ntmlopez@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small explosions and tremor detected; Color Code\/Alert Level raised to ORANGE\/WATCH","sentUtc":"2020-02-15","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2020-02-14T23:57:10-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-02-14T23:57:10-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-02-14T23:57:10-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200207\/0120Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Shishaldin Volcano has decreased over the past week to levels slightly above background. In addition, satellite views of the volcano over the same period show a decrease in surface temperatures at the summit. Eruptive activity appears to have ended or paused. Due to this decrease in activity, the Alaska Volcano Observatory is decreasing the Aviation Color Code for Shishaldin Volcano to YELLOW and the Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible for eruptive activity to resume with little warning and AVO will continue to monitor the volcano closely.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin to YELLOW\/ADVISORY based on lack of eruptive activity","sentUtc":"2020-02-07","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-02-06T14:44:12-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-02-06T14:44:12-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-02-06T14:44:12-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200120\/0937Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A63\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions declined greatly at about 8:30 PM AKST (5:30 UTC 20 January). Seismicity is currently low. The Aviation Color Code is lowered to ORANGE and Alert Level to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite images show the detached volcanic cloud drifting east-southeast over the Pacific Ocean. A sigmet from the National Weather Service is still in effect for the detached cloud: https:\/\/www.weather.gov\/aawu\/sigmets\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nLow-level steam and ash emissions may be ongoing from the summit vent. It is possible for more significant eruption to resume with little warning.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions stopped at about 8:30 PM AKST. Seismicity low.","sentUtc":"2020-01-20","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-01-20T00:16:35-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-20T00:16:35-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-20T00:16:35-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200119\/1728Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A58\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EStarting at about 09:30 UTC (12:30 AM AKST), the eruption at Shishaldin intensified, and about two hours ago began generating a more ash-rich volcanic plume. The plume now extends from the summit 150 km east and is as high as about 20,000 ft asl, as seen in satellite data. Seismicity is elevated and the eruption is detected on regional infrasound arrays. The aviation color code is being raised to RED and the volcano alert level to WARNING.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe National Weather Service has issued a SIGMET for this activity. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eheading east\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption ongoing. Plume up to 20,000 ft asl heading east.","sentUtc":"2020-01-19","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-01-19T07:50:09-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-19T07:50:09-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-19T07:50:09-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200109\/2325Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A17\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThere has been no explosive activity observed at Semisopochnoi since December 19, 2019.  Seismic tremor had decreased over the subsequent weeks with the last observation of seismic tremor on December 29, 2019.  Seismicity has continued to decline, but remains above background. Thus, the Aviation Color Code is lowered to YELLOW and the Alert Level to ADVISORY.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity decreased; Color Code\/Alert Level lowered to YELLOW\/ADVISORY","sentUtc":"2020-01-09","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2020-01-09T13:45:23-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-09T13:45:23-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-09T13:45:23-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200108\/0417Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions have declined significantly since about 12:00 PM AKST (21:00 UTC). The Aviation Color Code is lowered to ORANGE and Alert Level to WATCH.     \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSeismicity is currently low. Satellite data from this afternoon suggest continued low-level eruptive activity. It is possible for more explosive activity to resume with little warning. \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ena\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant ash emissions ended at about noon AKST. Low-level eruption continues.","sentUtc":"2020-01-08","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-01-07T18:35:20-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-07T18:35:20-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-07T18:35:20-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200107\/2133Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh eruption at Shishaldin continues and has intensified as shown in satellite and lightning data. Satellite data suggest the ash cloud is as high as 27,000 ft asl and drifting east-northeast. Aviation Color Code is RED and Alert Level is WARNING.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe National Weather Service has issued a SIGMET for this activity (https:\/\/www.weather.gov\/aawu\/).    \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible for the current activity to intensify or decrease with little warning. AVO will issue further information as warranted. \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUp to 27,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDrifting ENE\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions ongoing and intensified. Ash cloud to 27,000 ft asl and drifting ENE. ","sentUtc":"2020-01-07","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-01-07T12:18:54-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-07T12:18:54-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-07T12:18:54-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200107\/1839Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated seismicity since a little after 5:00 AM AKST today is continuing and likely accompanied by ash emissions. A volcanic cloud is visible in satellite data as high as about 23,000 ft asl drifting to the east-northeast of the volcano. Strongly elevated and saturated surface temperatures in satellite imagery are indicative of active lava effusion at the summit vent. Shishaldin remains at Aviation Color Code ORANGE and Alert Level WATCH.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe National Weather Service has issued a SIGMET to 23,000 ft above sea level (https:\/\/www.weather.gov\/aawu\/).    \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible for the current activity to intensify or decrease with little warning. AVO will issue further information as warranted. \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUp to 23,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDrifting ENE\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions occurring. Ash cloud is up to 23,000 ft asl and drifting east-northeast. ","sentUtc":"2020-01-07","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-01-07T09:14:18-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-07T09:14:18-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-07T09:14:18-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20200103\/2038Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2020\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity occurring at Shishaldin Volcano. Activity this morning has  produced an ash cloud to 20,000 - 24,000 feet that is moving to the E-SE. The level of seismic activity has increased to moderate levels and several pilot observations of ash clouds have been reported to AVO. The ash cloud is visible in satellite data and extends 15-20 miles beyond the volcano to the southeast. Shishaldin remains at Aviation Color Code ORANGE and Alert Level WATCH.  The National Weather Service has issued  SIGMET to 24,000 ft above sea level (https:\/\/www.weather.gov\/aawu\/).    \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishadin remains at a heightened level of unrest and explosions may occur with little warning.   \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E24,000\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity ongoing.  Ash cloud to 24,000ft.  ","sentUtc":"2020-01-03","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2020-01-03T11:29:45-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2020-01-03T11:29:45-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2020-01-03T11:29:45-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191228\/2043Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several days seismic activity has increased at Pavlof. No eruptive activity or emissions from the summit have been observed. However, the seismic activity represents an increase from background levels and we are thus increasing the the Aviation Color Code and Alert Level to YELLOW\/ADVISORY. This does not mean that an eruption is likely or imminent. However, past eruptions of Pavlof occurred with little or no warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level raised to Yellow\/Advisory based on increased seismic activity.","sentUtc":"2019-12-28","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2019-12-28T11:30:01-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-12-28T11:30:01-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-12-28T11:30:01-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191212\/1718Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-lived explosion from Shishaldin Volcano  has produced an ash cloud to 20,000 - 25,000 feet and is moving to the W-NW.   A tremor burst was observed in seismic data at 7:10 (16:10 UTC) and had a duration of about 3 minutes.  Three lightning stroke were detected.  Shishaldin remains at Aviation Color Code ORANGE and Alert Level WATCH.  The National Weather Service has issued  SIGMET to 25,000 ft above sea level (https:\/\/www.weather.gov\/aawu\/).    \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishadin remains at a heightened level of unrest and explosions may occur with little warning.   \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E25,000\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERising above cloud deck moving to the W-NW from Shishaldin at approximately 45 knots\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKristi Wallace, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nkwallace@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-lived explosion.  Ash cloud to 25,000ft.  ","sentUtc":"2019-12-12","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2019-12-12T07:54:34-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-12-12T07:54:34-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-12-12T07:54:34-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191207\/1025Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption signature was detected as strong tremor on local seismic and in regional infrasound networks on Adak Island. The event started at 00:26 AKST \/ 09:26 UTC and has continued with and ongoing but weaker local seismic signal. Any volcanic ash emissions are most likely low-level.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe meteorological cloud deck has been around 10,000' (3000 m) asl over Semisopochnoi and no ash signals have been detected above this height. Nothing has been detected in lightning data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption detected; color code\/activity level raised to ORANGE\/WATCH","sentUtc":"2019-12-07","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2019-09-18T09:33:07-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-09-18T09:33:07-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-09-18T09:33:07-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191115\/2116Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data over the past week and regional seismic and infrasound data show no evidence of eruptive activity. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosions at Cleveland are likely. They occur without warning and typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No evidence of eruptive activity in recent data","sentUtc":"2019-11-15","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2019-11-15T11:27:49-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-11-15T11:27:49-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-11-15T11:27:49-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191108\/2033Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data from the past day suggest that slow effusion of lava may have begun in the summit crater. Thus, AVO is increasing the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. Highly elevated surface temperatures consistent with lava at the surface have been observed over the past day and robust steaming was seen in web camera and satellite data yesterday. No evidence of explosive, ash-producing activity observed. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosions at Cleveland are likely and the presence of a lava dome in the summit crater may increase the possibility of this type of activity. They occur without warning and typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Possible lava effusion in the summit crater","sentUtc":"2019-11-08","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2019-11-08T11:07:31-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-11-08T11:07:31-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-11-08T11:07:31-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191106\/1946Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is reducing the Aviation Color Code to GREEN and the Alert Level to NORMAL. Small explosion signals from Pavlof were detected on October 19, 2019 on the infrasound network located at Sand Point and on the on the local seismic and infrasound network. Since that time there have not been additional signs of unrest in any of the monitoring data. Pavlof is now considered to have returned to background levels of activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level reduced to Green\/Normal based on no signs of unrest.","sentUtc":"2019-11-06","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2019-11-06T09:40:48-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-11-06T09:40:48-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-11-06T09:40:48-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191019\/2207Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESmall explosion signals from Pavlof have been detected on the infrasound network located at Sand Point and on the local seismic network today. The volcano is currently obscured by clouds in satellite images. It is unknown if the explosions produced any volcanic ash, but their small size suggests any hazard is currently confined to the area around the volcano's summit. Because these signals are above normal background for Pavlof, the Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level raised to Yellow\/Advisory based on infrasound and seismicity. ","sentUtc":"2019-10-19","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2019-10-19T13:44:42-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-10-19T13:44:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-10-19T13:44:42-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20191017\/1906Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EObservations from today show that a new lava effusion event began at Shishaldin on 13 October.  Elevated surface temperatures have been observed at the summit of Shishaldin and low-level seismicity continues on the local network indicating that eruptive activity is likely continuing.  The eruption is confined to the summit area and no ash clouds have been observed.  The Alaska Volcano Observatory is raising the Aviation Color Code for Shishaldin Volcano to ORANGE and the Alert Level to WATCH.   \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nTaryn Lopez, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ntmlopez@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Low-level eruptive activity observed at Shishaldin. Color code raised to Orange\/Watch.","sentUtc":"2019-10-17","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2019-10-17T10:02:26-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-10-17T10:02:26-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-10-17T10:02:26-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190926\/2109Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Shishaldin Volcano has decreased over the past few weeks to levels slightly above background. In addition, satellite views of the volcano over the same period show a decrease in surface temperatures at the summit. Eruptive activity appears to have ended or paused. Due to this decrease in activity, the Alaska Volcano Observatory is decreasing the Aviation Color Code for Shishaldin Volcano to YELLOW and the Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin alert level decreased from ORANGE\/WATCH to YELLOW\/ADVISORY.","sentUtc":"2019-09-26","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2019-09-26T12:01:42-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-09-26T12:01:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-09-26T12:01:42-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190918\/2110Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Semisopochnoi has decreased over the past few weeks with no observations of seismic tremor since September 15.  Low-level sulfur dioxide emissions continue to be observed when conditions permit.  Other than the ongoing refilling of the crater lake, no changes in surface features have been observed since the small, shallow cone that formed around August 24.  Due to the decrease in activity, AVO is lowering the color code\/activity level to YELLOW\/ADVISORY.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity decreased; color code\/activity level lowered to YELLOW\/ADVISORY","sentUtc":"2019-09-18","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2019-09-18T09:46:46-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-09-18T09:46:46-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-09-18T09:46:46-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190906\/1828Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWrangell  (VNUM #315020)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 62 deg  W 144 deg 1 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tWrangell Volcanic Field\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E14163 ft (4317 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory (AVO) has reestablished seismic monitoring instruments at Mount Wrangell and can now confidently monitor seismic unrest at the volcano. With renewed seismic monitoring, the volcano moves from \u0022UNASSIGNED\u0022 to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to use satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMt. Wrangell is a 4317 m (14,163 ft) high, andesitic, shield volcano with an ice-filled summit caldera, located in the Wrangell-St. Elias National Park and Preserve. Mt. Wrangell has three small post-caldera craters, named North Crater, East Crater, and Mt. Zanetti.  These craters are all geothermally active, and there are frequent historical reports of steam from Mt. Wrangell.  There are also several questionable reports of historical eruptive activity.  Mt. Wrangell is 330 km (206 mi) northeast of Anchorage.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI, dfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The seismic network on Mount Wrangell volcano has been reestablished.","sentUtc":"2019-09-06","obs":"avo","vName":"Wrangell","vnum":"315020","noticeId":"DOI-USGS-AVO-2019-08-26T13:49:28-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-08-26T13:49:28-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-08-26T13:49:28-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190906\/1827Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDutton  (VNUM #312011)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 11 min W 162 deg 16 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4833 ft (1473 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory (AVO) has reestablished seismic monitoring instruments at Mount Dutton and can now confidently monitor seismic unrest at the volcano. With renewed seismic monitoring, the volcano moves from \u0022UNASSIGNED\u0022 to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to use satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Dutton is located near the tip of the Alaska Peninsula and lies jointly within the Izembek Wilderness Area and the Alaska Peninsula Wildlife Refuge. Dutton is a snow- and ice-covered stratovlocano which rises to an elevation of 4833 feet. Although it has no historic eruptive activity, intense earthquake swarms occurred at the volcano in 1984 and 1988. Dutton is located 14 km (9 miles) north of King Cove and 30 km (19 miles) east of Cold Bay.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGIdfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Dutton moved from UNASSIGNED to GREEN; reestablishment of functioning seismic network.","sentUtc":"2019-09-06","obs":"avo","vName":"Dutton","vnum":"312011","noticeId":"DOI-USGS-AVO-2019-08-26T13:15:36-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-08-26T13:15:36-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-08-26T13:15:36-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190825\/2051Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EFollowing pilot reports of steaming and the detection of low-level tremor at Veniaminof on August 1, the volcano has returned to background activity. Therefore AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level changing to GREEN\/NORMAL","sentUtc":"2019-08-25","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2019-08-25T09:39:30-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-08-25T09:39:30-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-08-25T09:39:30-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190801\/2221Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EPilot reports of steaming coincided with low-level tremor recorded at Veniaminof at 20:30 UTC (12:30 AKDT). These observations mark a departure from recent background activity. Therefore AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov  (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCheryl Cameron, Acting Coordinating Scientist, ADGGS\u003Cbr \/\u003E\r\ncheryl.cameron@alaska.gov  (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level changing to YELLOW\/ADVISORY","sentUtc":"2019-08-01","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2019-08-01T14:06:55-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-08-01T14:06:55-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-08-01T14:06:55-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190724\/1939Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is raising the Aviation Color Code to ORANGE and the Alert Level to WATCH at Shishaldin Volcano. Field crews reported an active lava lake and minor spattering within the summit crater during a helicopter overflight. Elevated seismic activity continues similar to the past few weeks along with consistent elevated surface temperatures in satellite images. No lava or ash has erupted outside the summit crater at this time. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njflarsen@alaska.edu  (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin alert level increased to ORANGE\/WATCH from YELLOW\/ADVISORY.","sentUtc":"2019-07-24","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2019-07-24T11:10:59-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-07-24T11:10:59-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-07-24T11:10:59-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190718\/1838Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated seismicity that began yesterday has increased overnight. A stronger tremor signal recorded at 23:39 AKDT \/ 07:39 UTC also produced an infrasound signal on an infrasound array 260 km (161 miles) east on Adak island. This event likely produced ash emissions, and at the current level of continued unrest similar events could occur with little to no warning. The meteorological cloud deck has been around 10,000' (3000 m) asl over Semisopochnoi and no ash signals have been detected above this height. A small plume extending 18 km (11 miles) from the Cerberus vent was visible in satellite data from yesterday, but did not contain an ash signal.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNothing has been detected in lightning data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njflarsen@alaska.edu  (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity increased; color code\/activity level raised to ORANGE\/WATCH","sentUtc":"2019-07-18","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2019-07-18T09:29:51-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-07-18T09:29:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-07-18T09:29:51-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190715\/1939Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Great Sitkin Volcano has decreased to background levels over the past few weeks. There is no evidence of eruptive activity in geophysical data streams or in satellite observations. Thus, AVO is decreasing the Aviation Color Code to GREEN and Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity returned to background levels. Alert level downgraded to GREEN\/NORMAL.","sentUtc":"2019-07-15","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2019-07-15T10:50:31-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-07-15T10:50:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-07-15T10:50:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190712\/2109Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY at Shishaldin Volcano. This change is based on increased seismic activity over the past few weeks, accompanied by elevated surface temperatures at the summit in satellite data. A pilot also observed incandescence in the summit crater during a recent overflight. These observations represent a departure from normal background activity at Shishaldin, but do not necessarily indicate that an eruption will occur.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin alert level increased to YELLOW\/ADVISORY from GREEN\/NORMAL.","sentUtc":"2019-07-12","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2019-07-12T12:33:03-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-07-12T12:33:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-07-12T12:33:03-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190705\/0651Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EDue to an increase in seismicity above background levels over at least the last 8 hours AVO is raising the Aviation Color Code to YELLOW and Alert Level to ADVISORY at Semisopochnoi.  No explosive activity has been detected on the Adak infrasound array and clouds currently obscure satellite views of the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to monitor the volcano using satellite, infrasound and seismic data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismic activity above background levels.","sentUtc":"2019-07-05","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2019-07-04T22:25:21-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-07-04T22:25:21-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-07-04T22:25:21-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190612\/1908Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe elevated levels of seismic activity, apparent since about mid-May, have declined to background levels. Therefore we are lowering the Aviation Color Code and Alert Level to GREEN\/NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe volcano continues to emit a vapor plume that is occasionally visible in web camera views, and elevated surface temperatures continue to be observed occasionally at the summit crater in high-resolution satellite data. Such observations are common and reflect the steady emission of hot volcanic vapors from a near-vertically oriented vent.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert Level Change to GREEN\/NORMAL due to unrest ending","sentUtc":"2019-06-12","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2019-06-12T09:43:31-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-06-12T09:43:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-06-12T09:43:31-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190602\/1903Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA small steam explosion at 21:40 AKDT June 1 (5:40 UTC June 2) was detected at Great Sitkin Volcano in local seismic data. No corresponding signal was seen in regional infrasound data or cloudy satellite observations. Low-level seismic activity was elevated just before and after the event. In response to this activity, AVO is raising the Aviation Color Code YELLOW and Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small steam explosion detected. Alert levels raised.","sentUtc":"2019-06-02","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2019-06-02T10:20:37-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-06-02T10:20:37-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-06-02T10:20:37-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190515\/2222Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past day low-frequency seismic tremor has been observed at Pavlof and web camera observations from this morning showed a vigorous steam plume from the summit. This represents an increase from background activity and we are increasing the the Aviation Color Code and Alert Level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis does not mean that an eruption is likely or imminent. However, past eruptions of Pavlof occurred with little or no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert Level Change to YELLOW\/ADVISORY due to increased unrest","sentUtc":"2019-05-15","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2019-05-15T13:29:26-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-05-15T13:29:26-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-05-15T13:29:26-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190430\/2034Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity at Veniaminof ceased in early January 2019, and over the past four months indications of unrest have decreased. Therefore AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nLow-level tremor, slightly elevated surface temperatures and minor steam emissions continue, but are now considered typical for this post-eruptive period. This activity will likely continue for many months. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lowering to GREEN\/NORMAL.","sentUtc":"2019-04-30","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2019-04-30T12:05:56-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-04-30T12:05:56-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-04-30T12:05:56-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190225\/2030Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity at Great Sitkin Volcano has decreased to background levels over the past month. There are no evidence of explosive activity in geophysical data streams or in satellite observations. Thus, AVO is decreasing the Aviation Color Code GREEN and Alert Level to NORMAL. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity has decreased to background levels. Alert levels lowered.","sentUtc":"2019-02-25","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2019-02-25T11:25:29-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-02-25T11:25:29-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-02-25T11:25:29-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190225\/2024Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data from 22 February 2019  and regional seismic and infrasound data show no evidence of eruptive activity. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosions at Cleveland  are likely. They occur without warning and typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano does not have any functioning equipment near the volcano, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of regional seismic, infrasound, lightning, and satellite data. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Data show no signs of eruptive activity.","sentUtc":"2019-02-25","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2019-02-25T11:11:41-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-02-25T11:11:41-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-02-25T11:11:41-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190202\/0031Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDutton  (VNUM #312011)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 11 min W 162 deg 16 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4833 ft (1473 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO can no longer seismically monitor Mount Dutton volcano due to the lack of a functioning seismic network there. As a result, AVO is unable to (1) assess whether Dutton may be building towards an eruption and (2) quickly confirm or dismiss reports of activity at the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBecause Dutton is no longer seismically monitored, it will move from volcano alert level Normal and aviation color code Green to \u0022unassigned.\u0022 As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, regional infrasound, lightning, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Dutton is located near the tip of the Alaska Peninsula and lies jointly within the Izembek Wilderness Area and the Alaska Peninsula Wildlife Refuge. Dutton is a snow- and ice-covered stratovlocano which rises to an elevation of 4833 feet. Although it has no historic eruptive activity, intense earthquake swarms occurred at the volcano in 1984 and 1988. Dutton is located 14 km (9 miles) north of King Cove and 30 km (19 miles) east of Cold Bay.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Dutton moved from GREEN to UNASSIGNED due to lack of functioning seismic network.","sentUtc":"2019-02-02","obs":"avo","vName":"Dutton","vnum":"312011","noticeId":"DOI-USGS-AVO-2019-02-01T14:44:32-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-02-01T14:44:32-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-02-01T14:44:32-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190117\/2025Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2019\/A53\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data show that starting around 12 January, a new and growing lava dome is present in Cleveland's summit crater. Thus, AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe presence of the lava dome may increase the likelihood of explosive activity at the volcano. Explosions at Cleveland usually occur without warning and typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is monitored by only one seismic station, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite data show new lava dome in summit crater. ","sentUtc":"2019-01-17","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2019-01-17T11:09:10-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-01-17T11:09:10-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-01-17T11:09:10-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190107\/2146Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe last detected explosive activity at Cleveland volcano occurred December 29, 2018 UTC (December 28 local time). We have no evidence of significant eruptive activity since that time. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosive activity is likely, and explosions usually occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored by only one seismic station, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity detected in geophysical or satellite data since Dec. 29 explosion.","sentUtc":"2019-01-07","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-06-10T12:47:53-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-06-10T12:47:53-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-06-10T12:47:53-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20190104\/1953Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2019\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity at Veniaminof has paused or stopped over the past week. Therefore AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. Seismic events continue, indicative of continued unrest.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPauses in eruptive activity are common at Veniaminof and resumed lava effusion and\/or ash emissions could resume at any time without significant seismic precursors.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity paused or stopped. Lowering to YELLOW\/ADVISORY","sentUtc":"2019-01-04","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2019-01-04T10:33:58-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2019-01-04T10:33:58-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2019-01-04T10:33:58-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181229\/0354Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELocal seismic sensors recorded a short-lived explosion today at 3:17 UTC December 29 (18:17 AKST December 28). A pilot report indicates an ash cloud to 17,000 ft asl. Local winds are from the west. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E17,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds are from west\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-lived explosion detected at 18:17 AKST. Report of ash to 17,000 ft asl.","sentUtc":"2018-12-29","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-12-28T18:49:57-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-12-28T18:49:57-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-12-28T18:49:57-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181219\/2035Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo eruptive activity has been detected at Semisopochnoi since November 1 when a satellite link for transmitting seismic data failed. Since that time, no changes have been observed in satellite data, and no explosions have been detected from the Adak Island infrasound array; the last explosion detected by infrasound was October 31.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is lowering the Aviation Color Code to UNASSIGNED and Alert Level to UNASSIGNED for Semisopochnoi due to the lack of evidence for ongoing eruptive activity. Seismic unrest may be continuing undetected. Pauses in eruptions lasting weeks to months are known to occur during volcanic eruptions. A return to eruptive activity may occur with little or no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe seismic monitoring network for Semisopochnoi has been offline since November 1, but if atmospheric conditions permit an infrasound array on Adak Island may detect explosion signals from Semisopochnoi with a 13 minute delay. Semisopochnoi is also monitored remotely with satellite observations and lightning sensors.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite observations suggest no recent volcanic activity","sentUtc":"2018-12-19","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2018-12-19T10:23:15-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-12-19T10:23:15-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-12-19T10:23:15-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181212\/2121Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELocal seismic sensors recorded a small explosion today at 20:53 UTC (11:53 AKST). No ash cloud has yet been detected in satellite imagery. No other significant activity was detected.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot known\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small explosion detected at 11:53 AKST; Alert level raised to ORANGE\/WATCH.","sentUtc":"2018-12-12","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-12-12T13:15:08-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-12-12T13:15:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-12-12T13:15:08-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181122\/2005Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions at Veniaminof have decreased since yesterday afternoon but continue at lower levels. Therefore AVO is lowering the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease reference https:\/\/www.weather.gov\/aawu\/sigmets for updated guidance on airborne ash hazards from the National Weather Service. \u003Cbr \/\u003E\r\n \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUp to ~10,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EContinuous low-level ash emissions observed in webcam\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh fall remains possible in nearby communities. National Weather Service  information about ashfall is available here: https:\/\/www.weather.gov\/afc\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions continue at decreased levels. Lowering to ORANGE\/WATCH","sentUtc":"2018-11-22","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2018-11-22T10:30:53-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-11-22T10:30:53-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-11-22T10:30:53-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181121\/2059Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo eruptive activity has been detected at Semisopochnoi since November 1 when a satellite link for transmitting seismic data failed. Since that time, no changes have been observed in satellite data, and no explosions have been detected from the Adak Island infrasound array; the last explosion detected by infrasound was October 31.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is lowering the Aviation Color Code and Alert Level to Yellow\/Advisory for Semisopochnoi due to the lack of evidence for ongoing eruptive activity. Seismic unrest may be continuing undetected. Pauses in eruptions lasting weeks to months are known to occur during volcanic eruptions. A return to eruptive activity may occur with little or no warning. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe seismic monitoring network for Semisopochnoi has been offline since November 1, but if atmospheric conditions permit an infrasound array on Adak Island may detect explosion signals from Semisopochnoi with a 13 minute delay. Semisopochnoi is also monitored remotely with satellite observations and lightning sensors.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite observations suggest no recent volcanic activity","sentUtc":"2018-11-21","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2018-11-20T14:45:46-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-11-20T14:45:46-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-11-20T14:45:46-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181121\/1915Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOvernight, ash emissions from Veniaminof increased significantly, generating a plume up to 15,000 ft asl and extending for more than 150 miles to the SE. This morning observers in Perryville and webcam views indicated continuous ash emissions. This activity is a significant increase from the past month and AVO is raising the Aviation Color Code to Red and the Volcano Alert Level to Warning. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA SIGMET warning for aviation has been issued by the National Weather Service. Please reference https:\/\/www.weather.gov\/aawu\/sigmets for updated guidance on airborne ash hazards.\u003Cbr \/\u003E\r\n \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUp to ~15,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EContinuous ash emissions observed in webcam\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh fall is possible in nearby communities. The National Weather Service Anchorage Forecast Office will issue an advisory if this is expected to occur. \u003Cbr \/\u003E\r\nhttps:\/\/www.weather.gov\/afc\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased continuous ash emissions to 15,000 ft and extending over 150 miles to the SE","sentUtc":"2018-11-21","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2018-11-21T09:58:43-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-11-21T09:58:43-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-11-21T09:58:43-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181026\/0535Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EStrong seismic tremor from Semisopochnoi consistent with an eruption began at 4:47 UTC (20:47 AKDT) and is currently diminishing. Satellite data through 5:00 UTC  (21:00 AKDT) show a small ash cloud at about 12,000 ft asl. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is raising the Aviation Color Code and Alert Level to Orange\/Watch for Semisopochnoi.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eabout 12,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds toward the southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption detected. Volcanic cloud visible in satellite at 12,000 ft asl.","sentUtc":"2018-10-26","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2018-10-25T21:09:48-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-10-25T21:09:48-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-10-25T21:09:48-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20181012\/1945Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent satellite observations and a lack of seismic tremor over the past week indicate eruptive activity at Semisopochnoi has paused. Thus we are lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. Although seismic tremor is currently absent at Semisopochnoi, discrete earthquake activity remains above background levels. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPauses in eruptive activity lasting for weeks to months are known to occur during volcanic eruptions. A return to eruptive activity remains a possibility at Semisopochnoi that could occur with little or no warning. AVO will continue to monitor the volcano closely.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite observations and lack of seismic tremor indicate eruption has paused.","sentUtc":"2018-10-12","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2018-10-12T09:46:10-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-10-12T09:46:10-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-10-12T09:46:10-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180917\/2133Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated seismicity that started yesterday has intensified over the past couple of hours, and a strong tremor signal at 20:49 UTC (12:49 AKDT) suggests that ash emissions may be occurring or are imminent at Semisopochnoi. Thus we are raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNothing has been detected in satellite, lightning, or infrasound data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Strong seismicity suggests ash emissions may be occurring or are imminent.","sentUtc":"2018-09-17","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2018-09-17T13:07:33-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-09-17T13:07:33-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-09-17T13:07:33-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180916\/1756Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in seismicity beginning 16:31 UTC (08:31 AKDT) on has prompted AVO to raise the Aviation Color Code and Volcano Alert Level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThere is no clear indication from satellite imagery or regional infrasound data that Semisopochnoi is erupting at this time. AVO will continue to monitor Semisopochnoi seismic data and evaluate satellite images.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ncwaythomas@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased seismicity over the past 2 hours. No signs of eruptive activity.","sentUtc":"2018-09-16","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2018-09-16T09:28:12-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-09-16T09:28:12-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-09-16T09:28:12-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180904\/2109Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity remains elevated at Veniaminof.   Low-level ash emissions have been observed in web camera images and have been confirmed by observers in Perryville.  Thus, AVO is raising the Aviation Color Code to Orange and the Volcano Alert Level to Watch. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8000-10,000ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELow-level ash emissions.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95, 2005, and 2013. These were Strombolian eruptions that produced lava fountains and minor emissions of ash and gas from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded, and in 2013, five small lava flows effused from the intracaldera cone over about five months. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 20,000 ft above sea level (1939 and 1956) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity remains elevated.  Low level ash emissions observed in web camera.","sentUtc":"2018-09-04","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2018-09-04T12:42:09-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-09-04T12:42:09-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-09-04T12:42:09-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180903\/1929Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Veniaminof, indicative of unrest, increased late last night and volcanic tremor is ongoing. Thus, AVO is rasing the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. There are, however, no signs of eruptive activity at this time. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95, 2005, and 2013. These were Strombolian eruptions that produced lava fountains and minor emissions of ash and gas from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded, and in 2013, five small lava flows effused from the intracaldera cone over about five months. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 20,000 ft above sea level (1939 and 1956) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased seismicity over the past day and ongoing. No signs of eruptive activity.","sentUtc":"2018-09-03","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2018-09-03T11:08:18-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-09-03T11:08:18-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-09-03T11:08:18-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180822\/1945Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Aviation Color Code is being reduced to Yellow and the Volcano Alert Level to Advisory at Cleveland volcano. Minor explosive activity was last observed in late July and since that time there has been no evidence of lava extrusion in the summit crater. Elevated surface temperatures in the summit crater continue to be observed during periods of clear weather, but are interpreted to be due to hot degassing. This is typical of Cleveland volcano and indicates that low-level unrest continues.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOccasional, short duration explosive activity with minimal to no precursory signals  is common at Cleveland volcano, and explosions may occur without warning. Explosions typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions may occur as they have in the past. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Reduction in alert level.","sentUtc":"2018-08-22","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-08-22T11:18:24-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-08-22T11:18:24-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-08-22T11:18:24-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180701\/1837Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity at Great Sitkin Volcano has increased above background levels over the past day. Numerous small, shallow earthquakes are occurring beneath the summit at rates as high as 10-20 per hour. It is uncertain if this unrest will lead to any eruptive activity but this remains a possibility given the general degree of unrest at Great Sitkin over the past several months. Thus AVO is raising the Aviation Color Code and Alert Level to YELLOW \/ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO detected a brief steam and ash explosion at Great Sitkin on June 10, and earthquake activity then declined to background levels over a period of about 2 weeks. Over the past several days, nothing significant has been observed in satellite data and no other signs of unrest have been detected or reported to AVO. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin Volcano is monitored by a five-station seismic network on Great Sitkin Island and with additional seismic stations on the nearby islands of Igitkin, Adak, Kagalaska, and Kanaga. A six-element infrasound array to detect explosions (atmospheric pressure waves) was installed on Adak Island in June, 2017, although it is currently (June 2018) only partly operational. AVO also uses satellite imagery to monitor Great Sitkin Volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. A seismic swarm occurred from July 2016 through the end of 2017. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity has increased above background levels.","sentUtc":"2018-07-01","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2018-07-01T09:42:20-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-07-01T09:42:20-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-07-01T09:42:20-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180627\/1849Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity at Great Sitkin Volcano has declined gradually and no further indications of increasing unrest have been observed since AVO detected a brief steam and ash explosion on June 10. For the time being, the volcano has returned to normal background levels of activity and AVO is thus lowering the Aviation Color Code and Alert Level to GREEN\/NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin Volcano is monitored by a five-station seismic network on Great Sitkin Island and with additional seismic stations on the nearby islands of Igitkin, Adak, Kagalaska, and Kanaga. A six-element infrasound array to detect explosions (atmospheric pressure waves) was installed on Adak Island in June, 2017, although it is currently (June 2018) only partly operational. AVO also uses satellite imagery to monitor Great Sitkin Volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. A seismic swarm occurred from July 2016 through the end of 2017. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcano has returned to background levels of activity","sentUtc":"2018-06-27","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2018-06-27T10:08:06-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-06-27T10:08:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-06-27T10:08:06-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180626\/2107Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite observations of Cleveland Volcano on June 25, 2018 indicate the presence of a small circular lava flow, about 80 meters in diameter, covering the floor of the summit crater.  Geophysical monitoring data from Cleveland Volcano has been unavailable since early yesterday afternoon and thus it is unknown if the effusion of lava within the crater generated detectable seismicity or infrasound. However, the presence of a lava flow over the active vent increases the possibility of a vent clearing explosion over the coming days to weeks and thus AVO is raising the Aviation Color Code and Volcano Alert Level to ORANGE\/WATCH. The last detected explosive activity at Cleveland volcano occurred May 5, 2018 UTC (May 4 local time). \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOccasional, short duration explosive activity with minimal to no precursory signals  is common at Cleveland Volcano, and explosions may occur without warning. Explosions typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions may occur as they have in the past. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite data indicates small lava flow in summit crater.","sentUtc":"2018-06-26","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-06-26T11:51:34-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-06-26T11:51:34-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-06-26T11:51:34-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180610\/2126Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity at Great Sitkin Volcano has been elevated over the past five days, and earlier today at 11:39 AKDT (19:39 UTC), a signal that may represent a short-lived steam explosion was detected by seismic data. AVO is thus raising the Aviation Color Code and Alert Level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin Volcano is monitored by a five-station seismic network on Great Sitkin Island and with additional seismic stations on the nearby islands of Igitkin, Adak, Kagalaska, and Kanaga. A six-element infrasound array to detect explosions (atmospheric pressure waves) was installed on Adak Island in June, 2017, although it is currently (June 2018) only partly operational. AVO also uses satellite imagery to monitor Great Sitkin Volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. A seismic swarm occurred from July 2016 through the end of 2017. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Elevated earthquake activity and possible small steam explosion","sentUtc":"2018-06-10","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2018-06-10T12:49:35-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-06-10T12:49:35-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-06-10T12:49:35-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180506\/2016Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe last detected explosive activity at Cleveland volcano occurred May 5, 2018 UTC (May 4 local time). We have no evidence of significant eruptive activity since that time. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosive activity is likely, and explosions usually occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity detected in geophysical or satellite data since May 5 explosion.","sentUtc":"2018-05-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-05-06T11:55:07-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-05-06T11:55:07-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-05-06T11:55:07-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180505\/0712Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data show that the recent explosion of Cleveland volcano at 05:49 UTC (21:49 local time) produced a small ash cloud up to 22,000 ft asl moving southeast. No other significant activity has been detected.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E22,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh seen in satellite imagery. Cloud drifting southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small ash cloud from recent explosion at 22,000 ft asl drifting southeast","sentUtc":"2018-05-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-05-04T23:02:17-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-05-04T23:02:17-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-05-04T23:02:17-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180505\/0620Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELocal seismic and infrasound sensors recorded a small explosion tonight at 05:49 UTC (21:49 local time). A few small earthquakes were also recorded at the volcano during the previous several days. No other significant activity was detected. No volcanic cloud has been detected in satellite imagery.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"New explosion detected.  Raising the alert level to ORANGE\/WATCH.","sentUtc":"2018-05-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-05-04T22:08:38-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-05-04T22:08:38-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-05-04T22:08:38-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180406\/1831Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe last detected explosive activity at Cleveland volcano occurred April 4, 2018. We have no evidence of significant eruptive activity since that time. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosive activity is likely, and would likely occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity detected in geophysical or satellite data since April 4 explosion.","sentUtc":"2018-04-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-04-06T09:16:57-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-04-06T09:16:57-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-04-06T09:16:57-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180404\/1235Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELocal seismic and infrasound sensors recorded a small explosion today at 11:55 UTC (03:55 AKST). We are raising the Aviation Color Code to ORANGE  and the Alert Level to WATCH.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours. No ash cloud from this event has been seen in satellite images, which currently are partly obscured by weather clouds.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI, jfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"New explosion detected.  Raising the alert level to ORANGE\/WATCH.","sentUtc":"2018-04-04","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-04-04T04:26:29-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-04-04T04:26:29-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-04-04T04:26:29-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180404\/1223Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELocal seismic and infrasound sensors recorded a small explosion today at 11:55 UTC (03:55 AKST). A few small earthquakes were also recorded at the volcano during the last 24 hours. No other significant activity was detected.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI, jfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"New explosion detected.  Raising the alert level to ORANGE\/WATCH.","sentUtc":"2018-04-04","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-04-04T04:19:35-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-04-04T04:19:35-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-04-04T04:19:35-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180306\/2133Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECleveland Volcano remains at Aviation Color Code YELLOW and Alert Level ADVISORY. The Volcanic Activity Notice sent out at 12:06 AKST today was in error. There have been no changes in activity at the volcano. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Cleveland remains at YELLOW\/ADVISORY. VAN sent out at 12:06 AKST today was in error. ","sentUtc":"2018-03-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-03-06T12:27:29-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-03-06T12:27:29-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-03-06T12:27:29-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180306\/2106Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2018\/A94\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ETEST The last detected explosive activity at Cleveland Volcano occurred March 2, 2018. There is no evidence of significant eruptive activity since that time, and a clear satellite view today showed no new lava effusion in the crater. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosive activity is likely, and would likely occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"TEST","sentUtc":"2018-03-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-03-06T13:05:18-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-03-06T13:05:18-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-03-06T13:05:18-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180305\/2214Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe last detected explosive activity at Cleveland Volcano occurred March 2, 2018. There is no evidence of significant eruptive activity since that time, and a clear satellite view today showed no new lava effusion in the crater. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFuture explosive activity is likely, and would likely occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No significant eruptive activity detected.  Lowering alert level to YELLOW\/ADVISORY.","sentUtc":"2018-03-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-03-05T12:25:48-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-03-05T12:25:48-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-03-05T12:25:48-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180302\/1538Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELocal seismic and infrasound sensors recorded a small explosion today at 14:57 UTC (05:57 AKST). No other significant activity was detected.  A volcanic cloud was observed heading ENE at an altitude of about 15,000 ft.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nExplosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"New explosion detected.  Raising the alert level to ORANGE\/WATCH.","sentUtc":"2018-03-02","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-03-02T06:33:09-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-03-02T06:33:09-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-03-02T06:33:09-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180209\/2244Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2018\/A92\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe last detected explosive activity at Cleveland Volcano was on December 18, 2017. There is no evidence of significant activity since that time. Thus, AVO is reducing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. Future explosive activity is likely, and would occur without warning. Previous explosions have produced hazardous conditions primarily near the summit crater, but occasionally they have been large enough to produce a drifting ash cloud. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland Volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\npeizbekov@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Reducing alert level to YELLOW\/ADVISORY. No explosive activity for 2 months.","sentUtc":"2018-02-09","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2018-02-09T11:30:26-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-02-09T11:30:26-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-02-09T11:30:26-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180207\/2301Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2018\/A88\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is decreasing the Aviation Color Code to GREEN and the Alert Level to NORMAL at Shishaldin Volcano based on declining seismic and infrasound activity over the past month. These observations represent a return to normal background activity at Shishaldin.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin alert level decreased to GREEN\/NORMAL from YELLOW\/ADVISORY.","sentUtc":"2018-02-07","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2018-02-07T13:42:25-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-02-07T13:42:25-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-02-07T13:42:25-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20180118\/2236Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2018\/A55\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity at Great Sitkin Volcano has declined over the past two months to near background levels. No significant activity has been observed in satellite data during this time period and no steam plumes have been reported. AVO is thus lowering the Aviation Color Code and Alert Level to GREEN\/NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe number of earthquakes located at Great Sitkin increased as early as late July 2016, and the elevated seismicity continued throughout most of 2017. The unrest was likely the result of a magma intrusion beneath the volcano. The decline over the past two months in the number of earthquakes suggests the intrusion has stalled and the volcano is returning to a period of background seismicity. Future intrusions at Great Sitkin should also lead to an increase in earthquakes prior to any eruptive activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin Volcano is monitored by a five-station seismic network on Great Sitkin Island and with additional seismic stations on the nearby islands of Igitkin, Adak, Kagalaska, and Kanaga. A six-element infrasound array to detect explosions (atmospheric pressure waves) was installed on Adak Island in June, 2017. AVO also uses satellite imagery to monitor Great Sitkin Volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Declining seismicity over past 2 months suggests return to background","sentUtc":"2018-01-18","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2018-01-17T11:49:32-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2018-01-17T11:49:32-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2018-01-17T11:49:32-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20171213\/1515Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosion was detected at Cleveland Volcano in seismic and infrasound data this morning 04:20 AKST (13:20 UTC).  The explosion produced an eruption cloud that was observed in satellite data to an altitude of up to 20,000 ft asl and moving to the east.  AVO is raising the color code for Cleveland to Aviation Color Code ORANGE and Alert Level WATCH.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESmall cloud detected. NWS eruption SIGMET issued to 20,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving to the east.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An explosion detected.  Eruption cloud up to 20,000 ft. observed in satellte data. ","sentUtc":"2017-12-13","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-12-13T04:35:07-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-12-13T04:35:07-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-12-13T04:35:07-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20171212\/2131Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent satellite images of Cleveland Volcano show that lava effusion in the summit has likely ceased. Activity at Cleveland over the past several weeks has been characterized by small to very small explosions that have reduced the dome in the crater to rubble but have not produce detectable eruption clouds.  Due to the low level of current activity, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Activity has declined.  Color code lowered to YELLOW.","sentUtc":"2017-12-12","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-12-12T09:52:03-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-12-12T09:52:03-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-12-12T09:52:03-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20171206\/2009Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe last detected explosive activity at Bogoslof occurred on August 30, 2017. Over the past three months there has been no significant activity observed in seismic, infrasound, satellite or lightning data. Thus, we are decreasing the Aviation Color Code and Alert Level to UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO only assigns Aviation Color Codes and Alert Levels to volcanoes that have a local seismic monitoring network. Activity at Bogoslof has been detected using instruments from distant sites, thus we can not say authoritatively that the volcano has returned to its normal background state. However, we are no longer detecting any activity that would be considered to be indicative of unrest. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA resumption of eruptive activity is possible. It is likely that we would be able to detect significant explosive activity if it where to occur.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Bogoslof alert level decreased from YELLOW\/ADVISORY to UNASSIGNED?UNASSIGNED.","sentUtc":"2017-12-06","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-12-05T13:42:19-09:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-12-05T13:42:19-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-12-05T13:42:19-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20171206\/2006Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY at Shishaldin Volcano based on increased seismic and infrasound activity over the past few weeks. These observations represent a departure from normal background activity at Shishaldin, but do not necessarily indicate that an eruption will occur. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound networks. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin alert level raised from GREEN\/NORMAL to YELLOW\/ADVISORY.","sentUtc":"2017-12-06","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2017-11-30T14:09:05-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-11-30T14:09:05-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-11-30T14:09:05-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20171122\/1957Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin  (VNUM #311120)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 4 min W 176 deg 6 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5709 ft (1740 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent observations of a robust steam plume and a period of gradually increasing seismicity over several months indicate that Great Sitkin Volcano has become restless and is exhibiting behavior that is above background levels. AVO is thus raising the aviation color code and volcano alert level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPhotographs of the volcano taken by local observers on Sunday, November 19 show a light-colored vapor plume rising about 300 m (1,000 ft) above the vent area and extending about 15-20 km (9 \u201312 mi) to the south. Nothing unusual was observed in seismic or infrasound data around the time the photographs were taken and nothing noteworthy has been observed in satellite data since the emissions were observed. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAn increased number of small earthquakes was evident as early as late July 2016, and since then the level of seismic activity has fluctuated at low levels but has exhibited a gradual overall increase most notable since June 2017. Seismic activity to date has been characterized by earthquakes that are typically less than magnitude 1.0 and range in depth from near the summit of the volcano to 30 km below sea level. Most earthquakes are in one of two clusters, beneath the volcano's summit or just offshore the northwest coast of the island. The largest earthquake so far was a magnitude 2.8 on September 29, 2017.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPossible explosion signals were observed in seismic data on January 10 and July 21 of this year, but no confirmed emissions were observed locally or detected in infrasound data or satellite imagery. Great Sitkin has experienced at least one other episode of unrest characterized by vigorous steaming. This last occurred in 1953 but no subsequent eruptive activity developed. Minor steaming in the vicinity of the 1974 lava dome was observed in 1986 and in 2012 but no associated eruptive activity occurred.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nGreat Sitkin Volcano is monitored by a five-station seismic network on Great Sitkin Island and with additional seismic stations on the nearby islands of Igitkin, Adak, Kagalaska, and Kanaga. A six-element infrasound array to detect explosions (atmospheric pressure waves), was installed on Adak Island in June, 2017. AVO also uses satellite imagery to monitor Great Sitkin Volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe current unrest is likely the result of magma intrusion beneath the volcano. Typically, such intrusions release gas, which can increase stress in the crust and lead to an increase in the number of earthquakes. If gases build up near the surface, they may be released suddenly in small explosions or robust emissions. It is possible, but not certain, that the volcano may eventually erupt. Prior to a significant eruptive event an even greater increase in seismicity should occur as magma rises to shallower levels in the crust. An ash-producing eruption similar to the most recent historical eruption in 1974 could generate airborne ash that may pose hazards to aircraft. Ash fallout on the nearby community of Adak and the surrounding ocean may also occur. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGreat Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 43 km (26 miles) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in 1974, occupies the center of the crater. Great Sitkin erupted at least three times in the 20th century, most recently in 1974. That eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft above sea level. A poorly documented eruption occurred in 1945, also producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Elevated seismicity and observed steaming.","sentUtc":"2017-11-22","obs":"avo","vName":"Great Sitkin","vnum":"311120","noticeId":"DOI-USGS-AVO-2017-11-20T14:26:16-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-11-20T14:26:16-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-11-20T14:26:16-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170926\/0215Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA moderate, 2-minute-long eruption occurred at Cleveland Volcano beginning at 17:47 September 25 AKDT (01:47 September 26 UTC).  The explosion was detected by seismic and infrasound (air pressure) sensors.  Nothing has been observed in satellite data so far. We are keeping the Aviation Color Code\/Alert Level at ORANGE\/WATCH.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Moderate eruption of Cleveland detected in seismic and infrasound data ","sentUtc":"2017-09-26","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-09-05T10:36:32-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-09-05T10:36:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-09-05T10:36:32-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170830\/1931Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESince mid June, 2017, unrest at Pavlof Volcano has gradually declined to levels now considered as normal background, non-eruptive behavior. The March 2016 eruption changed the configuration of the summit crater, such that it is slightly wider and has a more vertical orientation than before the 2016 eruption. Since then, the volcano has remained relatively quiet, although there was a brief period of elevated seismicity in early June, 2017 that resulted in AVO raising the Aviation Color Code to Yellow and the Alert Level to Advisory where it has remained until today.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMany satellite views of the summit are now able to detect elevated surface temperatures within the crater and upper part of the volcanic conduit most likely associated with the emission of hot gases. This is now considered the normal thermal state of the volcano. Occasional emission of vapor plumes from the summit crater, sometimes visible from Cold Bay and Sand Point, is now relatively common. These emissions are also considered normal background behavior for Pavlof Volcano. On the basis of these observations, and the lack of any noteworthy seismic activity for the past several months, we are lowering the Aviation Color Code to Green and the Alert Level to Normal.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcano has returned to background status.","sentUtc":"2017-08-30","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2017-08-30T09:52:42-08:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-30T09:52:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-30T09:52:42-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170830\/1315Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO has detected an increase in seismic activity and infrasound consistent with an explosive eruption at Bogoslof volcano beginning at 12:05 UTC (04:05 AKDT) August 30 and continuing. A low-level ash cloud producing lightning has been detected in satellite data, but does not appear to be much higher than about 20,000 feet above sea level. Emission of volcanic ash is likely occurring based on seismic, infrasound, lightning, and satellite data.  Winds are toward south-southeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. AVO is evaluating all data sources and will provide more information as it becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAbout 20,000 feet above sea level\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds toward south southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity beginning at 12:05 UTC today. No ash detected yet in satellite data.","sentUtc":"2017-08-30","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-30T04:47:09-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-30T04:47:09-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-30T04:47:09-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170828\/1939Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO has detected an explosive eruption at Bogoslof volcano beginning at 19:17 UTC (11:17 AKDT) August 28 and lasting about 2 minutes. No ash cloud has yet been detected in satellite data, but volcanic ash emission has likely occurred based on seismic and infrasound data.  Winds are toward southeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. AVO is evaluating all data sources and will provide more information as it becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds toward southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-duration explosion at 19:17 UTC today. No ash detected yet in satellite data.","sentUtc":"2017-08-28","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-28T11:29:29-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-28T11:29:29-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-28T11:29:29-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170828\/1153Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption began at Bogoslof volcano at 11:23 UTC (03:23 AKDT) on August 28 and is ongoing. No ash cloud has been detected as of yet in satellite data, but volcanic ash emission likely occurred based on seismic and infrasound data.  Signal strengths suggest that the cloud is likely above 20,000 ft asl. Winds are towards the east-southeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. AVO is evaluating all data sources and will provide more information as it becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds toward east-southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-duration explosion at 11:23 UTC today. No ash detected yet in satellite images.","sentUtc":"2017-08-28","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-28T03:37:55-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-28T03:37:55-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-28T03:37:55-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170827\/2340Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA brief explosive eruption began at Bogoslof volcano at 23:08 UTC (15:08 AKDT) on August 27 and lasted about two minutes. No ash cloud has been detected as of yet in satellite data, but volcanic ash emission likely occurred based on seismic and infrasound data.  Signal strengths suggest that the cloud is likely below 20,000 ft asl. Winds are towards the southeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. AVO is evaluating all data sources and will provide more information as it becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds toward southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-duration explosion at 23:08 UTC today. No ash detected yet in satellite images.","sentUtc":"2017-08-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-27T15:25:24-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-27T15:25:24-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-27T15:25:24-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170827\/0102Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-lived eruption began at Bogoslof volcano at 00:29 UTC on August 27 (16:29 AKDT on August 26) and lasted about 4 minutes.   No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions likely occurred based on seismic and infrasound data. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds toward southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-lived eruption at 16:29 AKDT. No ash detected yet in satellite images.","sentUtc":"2017-08-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-26T16:54:58-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-26T16:54:58-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-26T16:54:58-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170822\/1918Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA moderate, 1-minute-long eruption occurred at Cleveland Volcano beginning at 10:43 AKDT (18:43 UTC) on 22 August.  The explosion was detected by seismic and infrasound (air pressure) sensors.  Nothing has been observed in satellite data so far. We are keeping the Aviation Color Code\/Alert Level at ORANGE\/WATCH.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Paskievitch, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpaskie@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI jfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Moderate erupiton of Cleveland detected in seismic and infrasound data ","sentUtc":"2017-08-22","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-08-22T11:02:33-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-22T11:02:33-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-22T11:02:33-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170808\/1819Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the three-hour-long eruption on Monday, 7 August that began around 10:00 AKST (18:00 UTC), and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 18:00 UTC August 7.  Color code lowered to ORANGE. ","sentUtc":"2017-08-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-08T08:47:03-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-08T08:47:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-08T08:47:03-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170807\/1853Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption began at Bogoslof volcano at about 18:00 UTC (10:00 AKDT) on August 7 and is continuing. A pilot report at 18:45 UTC indicates that the ash cloud had reached 32,000 ft asl. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWinds are currently to the south. Seismic and infrasound data suggest that the ash emissions are continuing. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E32,000 ft asl estimated by pilot report\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving towards south\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit, currently is in effect up to 32,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSee http:\/\/www.weather.gov\/afc\/ for details about expected ash fallout.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code and Alert Level.","sentUtc":"2017-08-07","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-07T10:46:16-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-07T10:46:16-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-07T10:46:16-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170807\/1834Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption of Bogoslof volcano began at about 18:00 UTC (10:00 AKDT) based on infrasound and seismic activity following more than an hour of increased seismicity. Satellite data from 18:00 UTC show an eruption cloud rising above the low cloud deck which is at an altitude of about 1500 ft. asl. There is no estimate of the eruption cloud height as of this time. As of yet there is no lightning activity that it typically observed during significant ash emissions.  This suggests that the activity is currently at a low level and the Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot determined yet\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVisible in satellite data from 18:00 UTC\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of any ash clouds can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity begining at 18:00 UTC. ","sentUtc":"2017-08-07","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-08-07T10:02:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-08-07T10:02:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-08-07T10:02:06-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170711\/0158Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption of Bogoslof volcano began at 1:06 UTC on July 11  (17:06 AKDT on July 10) and lasted about 15 minutes based on seismic data.  No volcanic cloud has been observed in satellite data, and no volcanic lightning or infrasound has been detected.  Winds are toward the east-southeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption occurred based on seismic. No ash detected yet in satellite.","sentUtc":"2017-07-11","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-10T17:40:29-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-10T17:40:29-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-10T17:40:29-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170710\/1840Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano at 18:00 UTC on July 10  (10:00 AKDT on July 10) and lasted 8 minutes.   No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are likely occurring based on infrasound data.  Winds are towards the southeast. Ash trajectory models indicate that a possible trace ash fall could occur on Unalaska, but unlikely to affect Dutch Harbor.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nGIpavel@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption occurred based on seismic\/infrasound data. No ash detected yet in satellite.","sentUtc":"2017-07-10","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-10T10:20:14-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-10T10:20:14-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-10T10:20:14-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170710\/1610Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the series of explosions that began on Sunday, 09 July at 23:47 AKDT (07:47 UTC July 10) and ended about 02:35 AKDT (10:35 UTC) July 10.  A small eruption cloud associated with the first two eruptive pulses was evident in satellite data. This cloud may have reached as high as 20,000 ft. above sea level and was carried to the southeast but dissipated rapidly. No additional volcanic clouds were observed in satellite data.  The activity also was detected in seismic and infrasound data.  After about 03:00 AKDT (11:00 UTC) seismicity declined and has remained at low levels.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Given the ongoing episodic nature of eruptive activity at Bogoslof, additional ash-producing eruptions could occur at any time.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nGIpavel@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption last night.  Color code lowered to ORANGE. ","sentUtc":"2017-07-10","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-10T07:30:09-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-10T07:30:09-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-10T07:30:09-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170710\/0851Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano at 07:47 UTC on July 9  (23:47 AKDT on July 9) lasting about 5 minutes followed 15 minutes later by a second explosion that lasted about 7 minutes.   A small ash cloud has been detected in satellite data.  Winds are towards the southeast. The Aviation Color Code is upgraded to RED and the Volcano Alert Level to WARNING.  Ash trajectory models indicate that a possible trace ash fall could occur on Unalaska, but unlikely to affect Dutch Harbor.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESmall cloud detectedt. NWS eruption SIGMET issued to 30,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 30,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nGIpavel@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption based on seismic & infrasound data. Ash detected in satellite images.","sentUtc":"2017-07-10","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-10T00:09:56-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-10T00:09:56-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-10T00:09:56-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170709\/1524Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Saturday, 08 July at 10:15 AKDT (18:15 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nGIpavel@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 18:15 UTC July 8.  Color code lowered to ORANGE. ","sentUtc":"2017-07-09","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-09T07:02:11-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-09T07:02:11-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-09T07:02:11-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170708\/1901Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ETwo short duration eruption pulses were detected in seismic data. The first began at 18:15 UTC (10:15 AKDT) that  lasted about 9 minutes, followed by a shorter pulse at 18:29 UTC (10:29 AKDT). The cloud has been observed in satellite data at an estimated height of 30,000 ft asl. The Aviation Color Code is being increased to Red and the Alert Level to Warning.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSeismic data has decreased following these two eruption pulses, but additional explosive activity is possible. Winds are towards the north over the Bering sea, and ashfall on populated islands is not likely. The National Weather Service has issued an eruption SIGMET warning for aviation with an eruption cloud height of 30,000 ft. This may be revised as new satellite data becomes available. See http:\/\/www.weather.gov\/aawu\/sigmets for the most current information.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E30,000 ft based on satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds are towards the north\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nGIpavel@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption occurred. Increasing Aviation Color Code to Red.","sentUtc":"2017-07-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-08T10:32:31-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-08T10:32:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-08T10:32:31-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170705\/1835Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Tuesday, 04 July at 19:07 AKDT (03:07 UTC 05 July) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 03:07 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-07-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-05T09:47:22-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-05T09:47:22-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-05T09:47:22-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170705\/0328Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother eruption began at Bogoslof at 19:07 AKDT July 4 (03:07 UTC, July 5) that lasted about 11 minutes and was detected in seismic and infrasound data. There are no satellite data yet available.  Winds are generally to the southeast.  The Aviation Color Code\/Alert Level remains at RED\/WARNING.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds are to southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud forecast can be found at the National Weather Service Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption detected in seismic and infrasound data.","sentUtc":"2017-07-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-04T19:20:25-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-04T19:20:25-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-04T19:20:25-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170705\/0135Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof at 16:51 AKDT July 4 (00:51 UTC, July 5) that lasted 13 minutes and was detected in seismic, infrasound, and satellite data. Winds are generally to the southeast, and initial satellite data suggest the cloud may be as high as 32,000 ft asl. AVO is raising the Aviation Color Code\/Alert Level to RED\/WARNING.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E32,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds are to southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENWS has issued a SIGMET to 32,000 ft.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption detected in seismic, infrasound, and satellite data. ","sentUtc":"2017-07-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-04T17:13:21-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-04T17:13:21-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-04T17:13:21-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170704\/1205Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA moderate, 10-minute-long eruption occurred at Cleveland Volcano beginning at 03:19 AKDT (11:19 UTC) on 4 July.  The explosion was detected by seismic and infrasound (air pressure) sensors.  No satellite data is currently available. We are elevating the Aviation Color Code\/Alert Level to ORANGE\/WATCH.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Moderate erupiton of Cleveland detected in seismic and infrasound data ","sentUtc":"2017-07-04","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-07-04T03:45:43-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-04T03:45:43-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-04T03:45:43-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170703\/1637Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Sunday, 02 July at 12:48 AKDT (20:48 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 20:48 UTC, 02 Jul.  Color code lowered to ORANGE. ","sentUtc":"2017-07-03","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-02T17:24:01-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-02T17:24:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-02T17:24:01-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170702\/2147Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption occurred at 20:48 UTC July 2 (12:48 AKDT July 2).  AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite data and pilot reports  shows a volcanic cloud with an estimated altitude of 36,000 ft asl moving towards the east. Seismic and infrasound data suggest that the ash emissions are no longer continuing. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E36,000 ft asl estimated by satellite and pilot report\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving towards east\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit, currently is in effect up to 36,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSee http:\/\/www.weather.gov\/afc\/ for details on possible ash fall on communities. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code and Alert Level.","sentUtc":"2017-07-02","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-02T13:34:45-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-02T13:34:45-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-02T13:34:45-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170702\/2119Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano at 20:48 UTC on July 02 (12:48 AKDT on July 2). Eruption seismicity had declined by 21:04 UTC (13:04 AKDT). No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions likely occurred  based on infrasound data.  Winds are towards the east. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. NWS eruption SIGMET issued.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds towards east\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption at 20:48 UTC, based on seismic data. No ash detected yet in satellite images.","sentUtc":"2017-07-02","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-07-02T13:00:36-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-07-02T13:00:36-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-07-02T13:00:36-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170630\/0155Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano at 01:24 UTC on June 30 (17:24 AKDT on June 29).  Seismicity returned to background at 01:45 UTC (17:45 AKDT) indicating an end or pause to the explosion.  No ash cloud has been detected as of yet in satellite data, but infrasound signals recorded from Bogoslof suggest volcanic ash emissions likely occurred.  Winds are towards the north. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. NWS eruption SIGMET issued. Unknown height\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds to the north\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/ for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption in progress, based on seismic data. No ash detected yet in satellite images.","sentUtc":"2017-06-30","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-29T17:45:19-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-29T17:45:19-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-29T17:45:19-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170627\/2336Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on June 27 at 03:17 AKDT (11:17 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 11:17 UTC. Color code lowered to ORANGE. ","sentUtc":"2017-06-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-27T14:31:40-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-27T14:31:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-27T14:31:40-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170627\/1152Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption began at Bogoslof volcano at 11:17 UTC on June 27  (03:17 AKDT) as indicated in seismic and lighting data and is continuing.   Although at this time there have been no satellite images or pilot reports received confirming eruptive activity, these monitoring data strongly suggest that significant ash emissions have occurred. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. NWS eruption SIGMET issued to 30,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWind direction to the northeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 30,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code and Alert Level.","sentUtc":"2017-06-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-27T03:33:33-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-27T03:33:33-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-27T03:33:33-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170627\/0248Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity for the eruption at Bogoslof volcano at 00:45 UTC on June 27 (16:45 AKDT on June 26) remained elevated until 00:59 UTC (16:59 AKDT) and has since declined to background levels. The eruption produced a volcanic cloud moving northeast with an estimated altitude of 25,000 ft asl by satellite data, and a pilot reported a visible cloud at 22,000 ft asl. Given the lower altitude of the volcanic cloud and short duration of the explosion, the Aviation Color Code remains ORANGE and Volcano Alert Level WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRecent eruptive episodes have produced multiple short-duration explosions interspersed with minutes to hours of inactivity between events, and future explosions could occur with little to no warning. AVO will continue to monitor seismic and infrasound data from nearby islands, as well as lightning data from the World Wide Lightning Location Network for signs of renewed activity.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E25,000 ft asl estimated by satellite & pilot report\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving towards northeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit currently is in effect up to 25,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity has declined. Ash emissions decreased below detection limit or ended.","sentUtc":"2017-06-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-26T18:06:39-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-26T18:06:39-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-26T18:06:39-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170627\/0111Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano at 00:45 UTC on June 27 (16:45 AKDT on June 26) and is continuing.   No ash cloud has been detected as of yet in satellite data through 00:50 UTC, but volcanic ash emissions are likely occurring based on seismic data.  Winds are towards the northeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet in satellite data through 00:50 UTC.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages should they be issued.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption in progress, based on seismic data. No ash detected yet in satellite images.","sentUtc":"2017-06-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-26T16:53:59-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-26T16:53:59-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-26T16:53:59-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170626\/2006Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent observations of Cleveland Volcano suggest that unrest has declined and it is unlikely that eruptive activity is continuing. Satellite observations have yielded no evidence for continuing lava effusion and there have been no detections of anomalous seismicity or infrasound from the volcano since a brief explosion on Tuesday evening (May 16) at 19:17 AKDT (03:17 May 17 UTC). Evidence for lava effusion in the summit crater was observed in satellite data on June 7, but since then observed surface temperatures have become weaker, suggesting that lava effusion has paused or ended.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe overall decline in unrest and lack of evidence for lava effusion warrants downgrading the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano downgraded to YELLOW\/ADVISORY.  ","sentUtc":"2017-06-26","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-06-26T09:11:34-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-26T09:11:34-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-26T09:11:34-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170624\/1954Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further explosions or ash emissions have been detected at Bogoslof Volcano since the explosive event at 0:40-0:44 AKDT (8:40-8:44 UTC), June 24. Since then, Bogoslof seismicity has remained low and nothing noteworthy has been detected in satellite, infrasound or lightning data.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, and precursory unrest may be minor or not detectable.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone Observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since explosion at 8:40-8:44 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-06-24","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-24T11:17:32-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-24T11:17:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-24T11:17:32-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170624\/0220Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption at Bogoslof volcano occurred at 00:49 UTC, June 24 (16:49 AKDT, June 23) and lasted about 10 minutes. The eruption produced a volcanic cloud that reached about 36,000 ft above sea level, and was accompanied by strong seismcity, lightning and infrasound. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite data through 1:30 UTC shows a volcanic cloud with an estimated altitude of 36,000 ft asl moving towards the northeast. Seismic and infrasound data suggest that the ash emissions are no longer continuing. The volcano is in a restless condition and additional explosive events may occur.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E36,000 ft asl estimated by satellite and pilot report of cloud to 30,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving towards northeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit currently is in effect up to 36,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/www.weather.gov\/aawu\/sigmets\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNo ash fallout is expected in populated areas, as the ash cloud is expected to be transported out over the ocean. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code and Alert Level.","sentUtc":"2017-06-24","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-23T17:56:22-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-23T17:56:22-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-23T17:56:22-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170624\/0131Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosion was detected in seismic and infrasound data at Bogoslof volcano beginning at 00:49 UTC, June 24  (16:49 AKDT, June 23) and lasting about 10 minutes. A small ash cloud was observed in satellite data starting at 0100 UTC. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. We will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E Preliminary SIGMET issued by NWS to 30,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EObserved in satellite beginning at 0100 UTC\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 30,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption in progress, based on seismic data. No ash detected yet in satellite images.","sentUtc":"2017-06-24","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-23T17:08:59-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-23T17:08:59-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-23T17:08:59-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170613\/2035Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo new explosive activity has been observed at Bogoslof volcano since the small explosion this morning  at 8:17 AKDT (16:17 UTC).   No ash cloud was detected in satellite imagery, likely because it was too small or below our detection limits.  The National Weather Service Alaska Aviation Weather Unit did not issue a SIGMET for this mornings event. No detectable activity has been seen in seismic or infrasound data since the explosion. We are therefore, lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone detected\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of ash cloud forecasts can be found at the National Weather Service Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"no new explosive activity detected since this mornings small explosion.","sentUtc":"2017-06-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-13T12:27:53-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-13T12:27:53-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-13T12:27:53-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170613\/1648Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA six-minute-long explosion was detected in seismic and infrasound data at 8:17 AKDT (16:17 UTC). There have been no satellite images of a resulting volcanic cloud, and its height is currently unknown. Lower level winds are currently to the northwest, and higher level winds to the southeast, over southern Unalaska Island. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at RED and Volcano Alert Level at WARNING. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eunknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELower-level winds to NW; higher level winds to SE\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud forecast can be found at the National Weather Service Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Six-minute-long explosion at 8:17 AKDT (16:17 UTC). Cloud height unknown. ","sentUtc":"2017-06-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-13T08:36:23-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-13T08:36:23-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-13T08:36:23-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170613\/0340Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Bogoslof that began 01:47 UTC June 13 (17:47 AKDT June 12) with a 9-minute duration explosion has resumed starting at 02:57 UTC June 13 (18:57 AKDT June 12) based on seismic and infrasound data. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe ash cloud produced during the initial 9-minute event has been observed in satellite data  through 02:20 UTC June 13 (18:20 AKDT June 12) and is estimated to be at about 25,000 feet above sea level drifting SE toward Unalaska Island.  Ash emissions from this new activity have yet to be observed but they are likely occurring with winds to the SE.  Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano.  Activity is ongoing and additional explosive events may occur.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E25,000 ft asl estimated by satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving towards SE\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit currently is in effect up to 25,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNo ash fallout is expected in populated areas, as the ash cloud is expected to be transported out over the ocean. \u003COR\u003E The National Weather Service in has issued a Special Weather Statement for the possibility of a trace amount of ash fallout in Unalaska\/Dutch Harbor tonight. See http:\/\/www.weather.gov\/afc\/ for details.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code and Alert Level.","sentUtc":"2017-06-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-12T19:09:03-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-12T19:09:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-12T19:09:03-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170613\/0213Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-lived eruption of Bogoslof volcano began June 13 at 01:47 UTC (17:47 AKDT June 12) and lasted about 9 minutes according to seismic and infrasound  data.   No ash cloud has been detected in satellite data yet but a single lightning stroke has been observed, thus volcanic ash emissions are likely occurring.   Winds are to the southeast and no ashfall is expected on communities.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode and activity may resume at any time.  The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. NWS eruption SIGMET issued to 25,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 25,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption in progress, based on seismic data. No ash detected yet in satellite images.","sentUtc":"2017-06-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-12T18:00:42-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-12T18:00:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-12T18:00:42-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170610\/2301Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Saturday, June 10 at 3:18 AKDT (11:18 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 11:18 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-06-10","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-10T13:08:45-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-10T13:08:45-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-10T13:08:45-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170610\/1303Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption is detected in multiple data streams. Small explosions were first observed on infrasound stations located on nearby Islands beginning  at 11:18 UTC (3:18 AKDT).  Activity transitioned to continuous seismic tremor at about 12:16 UTC and is ongoing. An eruption cloud has been observed in satellite data and lightning has been detected. AVO is raising the Aviation Color Code to RED  and the Volcano Alert Level remains at WARNING.  More information will be released as it becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E30,000 ft estimate  at 12:20 UTC\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds are generally northward\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service has issued a SIGMET for this eruption to 30,000 ft asl. Please check their information at http:\/\/www.weather.gov\/aawu\/ as this is an evolving situation and cloud height may change.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosion eruption seen in satellite, seismic, infrasound, lightning. ","sentUtc":"2017-06-10","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-10T04:15:28-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-10T04:15:28-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-10T04:15:28-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170608\/0605Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short duration explosive event occurred at Bogoslof volcano at 5:28 UTC on 8 June (21:28 AKDT on 7 June). Seismic and infrasound signals indicate that this event was very similar to the event from earlier today at 14:30 UTC.  The duration of the event was less than 2 minutes, and seismicity and infrasound returned to low levels following the explosion. A small steam-rich volcanic cloud is visible in satellite data, rising no more than 10,000 ft asl. Due to the brevity of the event, the Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWhite in visible wavelength satellite data.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service has issued a SIGMET warning for aviation for a volcanic cloud up to 10,000 ft asl. See http:\/\/www.weather.gov\/aawu\/sigmets for updated information.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short duration explosive event detected.","sentUtc":"2017-06-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-07T21:43:06-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-07T21:43:06-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-07T21:43:06-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170608\/0025Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA new lava dome has been observed in satellite data from earlier today. It is located in the northern portion of the vent lagoon, has breached sea level, and is about 110 m across. A robust steam plume is visible in satellite data, and at 2250 UTC (14:50 AKDT) extended for 75 km to the south over the western end of Unalaska Island at an estimated altitude of less than 10,000 ft asl. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSome past eruptions of Bogoslof have ended with the emplacement of a lava dome, but in other cases, lava effusion has been followed by additional explosions. If future explosions do occur, the resulting volcanic cloud could be more ash-rich than those that have occurred thus far in the sequence that began in 2016. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis level of activity is consistent with the current  Aviation Color Code of ORANGE and the Volcano Alert Level of WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELess than 10,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESteam-rich\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"New lava dome and robust steam plume observed.","sentUtc":"2017-06-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-07T15:51:28-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-07T15:51:28-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-07T15:51:28-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170607\/2303Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several days, there has been an increase in low-frequency earthquake activity at Pavlof. Such increases are sometimes seen prior to eruptive episodes, however in other cases they decline without eruptive activity. In addition, several short duration tremor-bursts have been observed today, and AVO received a pilot report of a possible ash cloud this afternoon. Infrasound data from local instruments on Pavlof and from a more distant network in Sand Point do not show any evidence of significant explosive activity. Precursory activity prior to eruptions of Pavlof are always very subtle, thus, on the basis of these observations we are increasing the Aviation Color Code to Yellow and the Alert Level to Advisory.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4000 ft. Pilot report of possible ash cloud.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPossible cloud not coming from vent, but drifting downwind.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity indicating heightened unrest.","sentUtc":"2017-06-07","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2017-06-07T14:09:32-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-07T14:09:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-07T14:09:32-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170607\/1505Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short duration explosive event occurred at Bogoslof volcano at 14:30 UTC on June 7 (6:30 am AKDT).  Seismic signals indicate that this event was slightly larger than a similar explosion detected at Bogoslof yesterday morning   The duration of the event was about 2 minutes, and seismicity returned to low levels following the explosion.  No volcanic cloud has been seen in satellite data as of 14:30 UTC.   Due to the brevity of the event, the Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis level of activity is consistent with the current  Aviation Color Code of ORANGE and the Volcano Alert Level of WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed in satellite data through 14:30 UTC\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short duration explosive event detected.  ","sentUtc":"2017-06-07","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-07T06:44:31-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-07T06:44:31-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-07T06:44:31-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170606\/1445Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short duration explosive event occurred at Bogoslof volcano at 14:00 UTC on June 6 (6:00 am AKDT)   The duration of the event was less than 2 minutes, and seismicity returned to low levels following the explosion.  No cloud from this event was observed in satellite data.  Due to the brevity of the event, the Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis level of activity is consistent with the current  Aviation Color Code of ORANGE and the Volcano Alert Level of WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone Observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short duration explosive event detected.  ","sentUtc":"2017-06-06","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-06T06:18:09-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-06T06:18:09-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-06T06:18:09-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170605\/2215Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELow amplitude seismic tremor from Bogoslof Volcano was detected in seismic data beginning at about 20:29, June 5 UTC (12:29 AKST) and has since decreased to background levels.  A USF&WS vessel in the vicinity reported vigorous steaming and a \u0022white plume\u0022 rising several thousand feet above sea level. This cloud was too small to be observed in satellite images.  Earlier today, a short duration explosive event occurred at Bogoslof (15:50 UTC, June 5) and produced a small volcanic cloud that was observed by a pilot. These events are near the lower level of detection threshold based on current monitoring capabilities and reinforce the hazard that continues to exist in the vicinity of Bogolsof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis level of activity is consistent with the current  Aviation Color Code of ORANGE and the Volcano Alert Level of WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESeveral thousand feet asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVisual observation. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Vigorous steam emissions reported accompanied by seismic tremor.","sentUtc":"2017-06-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-05T13:41:59-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-05T13:41:59-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-05T13:41:59-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170605\/1630Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short duration explosive event occurred at Bogoslof volcano at 15:50 UTC on June 5  (7:50 am AKDT) and produced a small volcanic cloud that was observed by a pilot. Winds are transporting the cloud towards the south at an estimated altitude of 20,000 ft asl. The duration of the event was less than 2 minutes, and seismicity returned to low levels following the explosion.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDue to the brevity of the event, the Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENWS eruption SIGMET issued.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short duration explosive event. Volcanic cloud to 20,000 ft asl.","sentUtc":"2017-06-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-06-05T08:15:28-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-06-05T08:15:28-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-06-05T08:15:28-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170601\/0451Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn short duration explosive event occurred at Bogoslof volcano at 2:42  UTC on June 1  (6:42 AKDT on May 31) and produced a small volcanic ash cloud that was observed in satellite data. Winds are transporting the cloud towards the northwest at an estimated altitude of 23,000 ft asl.  The duration of the event was less than 10 minutes, and seismicity returned to low levels following the explosion.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDue to the brevity of the event, the Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E23,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENWS eruption SIGMET issued.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 23,000 ft above sea level. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short duration explosive event. Ash cloud to 23,000 ft asl.","sentUtc":"2017-06-01","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-05-31T20:39:59-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-05-31T20:39:59-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-05-31T20:39:59-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170529\/0509Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Sunday, 28 May at 14:16 AKDT (22:16 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 22:16 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-05-29","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-05-28T15:49:20-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-05-28T15:49:20-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-05-28T15:49:20-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170528\/2249Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano today at about 14:16 AKDT (22:16 UTC May 28) and is continuing based on seismic data. No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are occurring on the basis of lightning detections. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING. Winds are towards the northwest. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds to northwest\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption started at 14:16 AKDT and continues.","sentUtc":"2017-05-28","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-05-28T14:43:44-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-05-28T14:43:44-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-05-28T14:43:44-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170517\/1908Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Tuesday, 16 May at 22:32 AKDT (06:32 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 06:32 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-05-17","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-05-17T10:53:51-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-05-17T10:53:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-05-17T10:53:51-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170517\/0726Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe explosive eruption that started today, May 16, around 22:32 AKST (May 17 06:32 UTC) is continuing. A pilot reported that the eruption has produced an ash cloud as high as 34,000 ft asl, and the Worldwide Lightning Location Network has detected lightning associated with the cloud. Winds are currently to the south. Ash has not yet been detected in satellite.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are raising the Aviation Color Code to RED and Volcano Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPIREP to 34,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds are to the south\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption starting at 22:32 AKDT produced ash cloud as high as 34,000 ft asl.","sentUtc":"2017-05-17","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-05-16T23:04:40-08:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-05-16T23:04:40-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-05-16T23:04:40-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170517\/0700Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in seismic and infrasound activity from Bogoslof was detected from stations on nearby islands starting today, May 16, around 22:32 AKST (May 17 06:32 UTC) and is continuing. We have no satellite observations yet, but the infrasound signal suggests an explosive eruption has likely begun. No lightning has been detected. AVO is raising the Aviation Color Code for Bogoslof to ORANGE and the Volcano Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe will provide more information as it becomes available including any information about a resulting ash cloud. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBogolsof is not monitored by a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to an explosive eruption.  Rapid detection of an ash-producing eruption may be possible using a combination of data from seismic and infrasound networks on neighboring islands and satellite and lightning detection data.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds are to the south\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic and infrasound data suggest explosive eruption started at 22:32 AKDT. ","sentUtc":"2017-05-17","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-05-16T22:49:42-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-05-16T22:49:42-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-05-16T22:49:42-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170424\/1943Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent satellite images show a new lava dome has been extruded in the summit crater of Cleveland.  The dome began growing sometime after the most recent explosion on March 31.  Slightly elevated surface temperatures have been observed in satellite images for the past couple of weeks. The first visual indication of new dome growth was observed in satellite images on April 15 with the presence of a small (less than 10-meter-diameter) mound deep in the March 31 crater.  By April 23, this mound had grown to 45 meters in diameter.  Dome growth has occurred with no obvious detectable seismicity.  The presence of a  growing lava dome in the summit crater of Cleveland prompts AVO to raise the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano upgraded to ORANGE\/WATCH.  ","sentUtc":"2017-04-24","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-04-24T11:34:35-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-04-24T11:34:35-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-04-24T11:34:35-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170419\/2023Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo new volcanic activity has been observed at Bogoslof Volcano in satellite, seismic or infrasound data since a short-lived increase in seismicity on April 15.  The last major explosive event occurred on March 8, 2017, and occasional high-spatial resolution satellite images show no significant surficial changes due to eruptive activity since that time. Based on the absence of detected activity over the past several days, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. Bogolsof is not monitored by a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to an explosive eruption. Rapid detection, and possible forecasting, of an ash-producing eruption may be possible using a combination of data from seismic and infrasound networks on neighboring islands and satellite and lightning detection data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGiven the lack of a local monitoring network and the unpredictability of the volcano, activity at Bogoslof could ramp up again at any time. Thus a Temporary Flight Restriction (TFR) remains in effect over the volcano for the time being. Please see http:\/\/tfr.faa.gov\/tfr2\/list.html for the status of the TFR. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Bogolsof Volcano status lowered to YELLOW\/ADVISORY due to decrease in seismicity. ","sentUtc":"2017-04-19","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-04-19T12:01:08-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-04-19T12:01:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-04-19T12:01:08-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170416\/0320Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in earthquake activity from Bogoslof was detected from stations on nearby islands starting April 15 around 15:01 AKST \/ 23:01 UTC. At this time there has been no evidence of renewed eruptive activity from infrasound, lightning, or satellite data. Similar sequences of earthquakes have preceded some of the explosive events during the ongoing unrest. Because this uptick in seismicity increases the likelihood of future explosive activity, AVO is raising the Aviation Color Code for Bogoslof to ORANGE and the Volcano Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBogolsof is not monitored by a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to an explosive eruption.  Rapid detection of an ash-producing eruption may be possible using a combination of data from seismic and infrasound networks on neighboring islands and satellite and lightning detection data.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGiven the lack of a local monitoring network and the unpredictability of the volcano, activity at Bogoslof could ramp up again at any time. Thus a Temporary Flight Restriction (TFR) remains in effect over the volcano for the time being. Please see http:\/\/tfr.faa.gov\/tfr2\/list.html for the status of the TFR. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI jfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Bogolsof Volcano status raised to ORANGE\/WATCH due to increase in earthquake activity. ","sentUtc":"2017-04-16","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-04-15T18:56:54-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-04-15T18:56:54-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-04-15T18:56:54-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170405\/1942Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo new volcanic activity has been observed at Bogoslof Volcano in satellite, seismic or infrasound data since a small explosion was detected on March 13.   The last major explosive event occurred on March 8, 2017, and occasional high-spatial resolution satellite images show no significant surficial changes due to eruptive activity since that time. Based on the absence of detected activity over the past three weeks, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBogolsof is not monitored by a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to an explosive eruption.  Rapid detection of an ash-producing eruption may be possible using a combination of data from seismic and infrasound networks on neighboring islands and satellite and lightning detection data.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EGiven the lack of a local monitoring network and the unpredictability of the volcano, activity at Bogoslof could ramp up again at any time. Thus a Temporary Flight Restriction (TFR) remains in effect over the volcano for the time being. Please see http:\/\/tfr.faa.gov\/tfr2\/list.html for the status of the TFR. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Bogolsof Volcano status lowered to YELLOW\/ADVISORY. ","sentUtc":"2017-04-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-04-03T12:20:32-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-04-03T12:20:32-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-04-03T12:20:32-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170405\/1941Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo activity has been observed at Cleveland Volcano since an explosion was detected in seismic and infrasound data on March 24.  Recent satellite images show no significant changes to the summit lava dome or crater since late February to early March.  Based on seismic levels remaining low and no observations of continued activity, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano lowered to YELLOW\/ADVISORY.  ","sentUtc":"2017-04-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-04-03T12:56:01-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-04-03T12:56:01-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-04-03T12:56:01-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170324\/1924Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA small explosion was detected at Cleveland volcano at 08:15 AKST (16:15 UTC) today in both seismic and infrasound (pressure sensor) data.  As a result AVO is increasing the Aviation Color Code to Orange and the Alert Level to Watch.  This event was short lived and similar, if not smaller, than recent explosions at this volcano.  Cloud cover to 30,000 feet above sea level is obscuring observations of the volcano by satellite views and no ash cloud has been observed. The ash cloud that was likely generated during this explosion has probably dissipated at this time and was likely not above 20,000 feet above sea level.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is not monitored with a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity.  We are able to detect explosive activity using infrasound and seismic instruments on the island.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo volcanic cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELikely below 20,000 feet above sea level and has likely dissipated at this time.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"small explosion detected this morning.","sentUtc":"2017-03-24","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-03-24T11:00:30-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-24T11:00:30-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-24T11:00:30-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170313\/1214Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-duration eruption began at Bogoslof volcano at 11:31 UTC on March 13 (3:31 AKDT on March 13) and ended 12 minutes later.  An ash cloud has been detected in satellite data, and volcanic ash emissions are also likely occurring based on infrasound data.  Winds are towards the south-southwest. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. Although the episode appears to be over and of short duration, additional activity is possible. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh cloud detected. NWS eruption SIGMET issued to 18,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 18,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDave Schneider, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-duration eruption, based on seismic data. Ash detected in satellite images.","sentUtc":"2017-03-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-03-13T03:47:18-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-13T03:47:18-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-13T03:47:18-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170309\/1701Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the three-hour-long eruption that began on Tuesday, 7 March at 22:36 AKST (07:36 UTC March 8) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No detected activity since last eruption ended March 8. Color code lowered to ORANGE. ","sentUtc":"2017-03-09","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-03-09T07:35:06-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-09T07:35:06-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-09T07:35:06-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170308\/2044Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo major activity has been observed at Cleveland Volcano since satellite data confirmed the eruption of a small volume lava dome within the summit crater over a month ago. Weakly elevated surface temperatures have been detected in satellite data in recent weeks that are consistent with cooling lava and are not considered to be indicative of new activity. Steaming from the summit crater has also been observed. Satellite images collected over the past few weeks show the small lava dome is not growing in size. Based on seismic levels remaining low and no observations nor reports of continued eruptive activity, AVO is reducing the Aviation color code to YELLOW and the Volcano Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is not monitored with a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of satellite, infrasound, lightning data and local observations. AVO is monitoring the unrest at Cleveland volcano as closely as possible and will release additional information if or when it becomes available. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo volcanic clouds observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano lowered to YELLOW\/ADVISORY","sentUtc":"2017-03-08","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-03-08T10:50:20-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-08T10:50:20-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-08T10:50:20-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170308\/0922Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption that began at Bogoslof volcano at 7:36 UTC on March 8 (10:36 pm AKST on March 7) is continuing, as indicated in seismic, lightning, and infrasound data. The ash cloud from the eruption has been observed to 35,000 feet in satellite images and is heading east. The current Aviation Color Code is RED and Alert level is WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe National Weather Service is issuing a Special Weather Statement for trace amounts (less than 1 mm) of ashfall on Unalaska Island including the community of Dutch Harbor\/Unalaska. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EObserved up to 35,000 ft.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeight may be revised as new satellite images are received.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 35,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption continuing","sentUtc":"2017-03-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-03-07T23:57:42-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-07T23:57:42-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-07T23:57:42-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170308\/0840Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption began at Bogoslof volcano at 7:36 UTC on March 8 (10:36 pm AKST on March 7) as indicated in seismic, lightning, and infrasound data. Although at this time there have been no satellite images confirming eruptive activity, these monitoring data strongly suggest that significant ash emissions have occurred. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed yet. Preliminary eruption SIGMET issued by NWS up to 20,000 ft asl.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code and Alert Level.","sentUtc":"2017-03-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-03-07T23:34:16-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-07T23:34:16-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-07T23:34:16-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170308\/0825Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption began at Bogoslof volcano at 7:36 UTC on March 8  (10:36 pm AKST on March 7) and is continuing.  No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are likely occurring based on lightning and infrasound data.  Winds are towards the east. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. AVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected yet. NWS SIGMET issued to 20,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,00 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption in progress, based on seismic data. No ash detected yet in satellite images.","sentUtc":"2017-03-08","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-03-07T22:59:25-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-03-07T22:59:25-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-03-07T22:59:25-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170221\/2137Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Sunday, 19 February at 17:45 AKST (February 20 02:45 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption at 02:45 Feb 20 UTC. Color code lowered to ORANGE.","sentUtc":"2017-02-21","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-21T11:57:06-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-21T11:57:06-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-21T11:57:06-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170220\/0307Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption began at Bogoslof volcano at 02:08 UTC on 20 February (17:08 AKST on 19 February). Seismic and infrasound data show a series of short-lived explosive pulses through 02:45 UTC; seismicity has been quiet since then. Recent satellite images show a cloud as high as 25,000 ft asl. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWinds are carrying the cloud from Bogoslof to the southeast, towards Unalaska Island. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E25,000 ft asl estimated by satellite\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving towards southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit, currently is in effect up to 25,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSee http:\/\/www.weather.gov\/afc\/ for details on ash fall forecasts from the National Weather Service. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code RED.","sentUtc":"2017-02-20","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-19T17:49:06-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-19T17:49:06-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-19T17:49:06-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170220\/0225Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption began at Bogoslof volcano at 02:08 20 February UTC (17:08 19 February AKST) as indicated in seismic and infrasound data. At this time there have been no satellite images received to indicate size of volcanic plume. The Aviation Color Code remains at ORANGE, but we will continue to monitor data closely and provide updates as necessary. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed yet \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to XX,XXX ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWinds at the volcano would currently carry an eruption cloud southeast towards Unalaska Island. Please see the National Weather Service for notices regarding ashfall: http:\/\/www.weather.gov\/afc\/ \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption started at 02:08 UTC.","sentUtc":"2017-02-20","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-19T16:54:29-09:00","colorCode":"ORANGE","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-19T16:54:29-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-19T16:54:29-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170220\/0135Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity as detected on instruments located on nearby islands is elevated and increasing in intensity, suggesting that an explosive eruption is likely imminent. As of yet there is no confirmation of significant ash emissions detected by lightning, infrasound or satellite data. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot yet observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of any ash clouds can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests eruption is likely imminent. ","sentUtc":"2017-02-20","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-19T15:12:33-09:00","colorCode":"ORANGE","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-19T15:12:33-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-19T15:12:33-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170219\/2110Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Saturday 18 February at 4:50 AKST (13:50 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new activity since eruption yesterday at 13:50 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-02-19","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-19T11:19:02-09:00","colorCode":"ORANGE","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-19T11:19:02-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-19T11:19:02-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170218\/1439Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption began at Bogoslof volcano at 04:26 AKST (13:26 UTC) as indicated in seismic and lightning data. Preliminary evidence from satellite suggests the cloud is at least as high as 25,000 ft asl. Seismic data suggest that the main ash emissions lasted for several minutes and seismicity is currently low again. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAt least 25,000 ft all\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds are variable in the area\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 25,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption started at about 04:26 AKST (13:26 UTC).","sentUtc":"2017-02-18","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-18T05:20:00-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-18T05:20:00-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-18T05:20:00-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170217\/1948Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption began at Bogoslof volcano at 18:55 UTC (09:55 AKST) today. Pulses of seismicity are continuing. Preliminary satellite data show an ash cloud, and lightning continues to be detected. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWinds are from the south and will generally carry the ash cloud north over the Bering Sea. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nActivity is ongoing and additional explosive events may occur. We will provide more information about the ash cloud as it becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESIGMET to 25,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECloud moving generally north\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit currently is in effect up to 25,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNo ash fallout is expected in populated areas as winds are to the north. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code RED.","sentUtc":"2017-02-17","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-17T10:33:20-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-17T10:33:20-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-17T10:33:20-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170217\/1921Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity as detected on instruments located on nearby islands has recently increased. Infrasound sensors on Okmok Volcano have also detected airwaves suggesting an explosive eruption has commenced. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of any ash clouds can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity and infrasound suggests eruption is occurring. ","sentUtc":"2017-02-17","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-17T10:11:34-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-17T10:11:34-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-17T10:11:34-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170213\/1900Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EStrong seismic activity at Bogoslof this morning from about 16:24 to 17:32 UTC (07:24 to 08:32 AKST) was detected on stations from nearby islands. Similar seismic activity has been associated with explosive eruptions that produced significant ash clouds from the volcano. Thus, AVO raised the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHowever, satellite data through 18:30 UTC (09:30 AKST) show no volcanic cloud visible about the weather cloud tops of about 10,000 ft asl. There were also no lightning strokes detected during this morning's activity.  We therefore conclude that, despite the intensity of seismic activity, a significant volcanic cloud was not produced during this event. We are thus lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAsh emissions to lower altitudes, as well as other eruptive activity, likely did occur during this morning's event, and conditions at the volcano remain unstable. Additional explosive activity could occur at any time, with little or no advance warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud above about 10,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit, was cancelled earlier this morning. Status of the ash cloud forecast can be found at their website at http:\/\/aawu.arh.noaa.gov\/\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe National Weather Service issued a Marine Weather Statement for the area around Umnak Pass: http:\/\/www.weather.gov\/afc\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Intense seismicity from 16:24 to 17:32 UTC; no ash cloud observed above 10,000 ft asl.","sentUtc":"2017-02-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-13T09:20:00-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-13T09:20:00-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-13T09:20:00-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170213\/1654Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA significant explosive eruption began at Bogoslof volcano at about 16:24 UTC on February 13 (07:24 AKST on February 13) as indicated in seismic data. Although at this time there has been no lightning detected, nor satellite images received to confirm eruptive activity, the intensity of seismicity strongly suggests that significant ash emissions have occurred. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed yet. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Significant explosive eruption and increase to Aviation Color Code RED.","sentUtc":"2017-02-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-13T07:29:37-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-13T07:29:37-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-13T07:29:37-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170213\/1620Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity as detected on instruments located on nearby islands is elevated and increasing in intensity, suggesting that an explosive eruption is likely imminent or has commenced. As of yet there is no confirmation of significant ash emissions detected by lightning, infrasound or satellite data. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is evaluating all data sources and will update this report as more information becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of any ash clouds can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests eruption may be imminent or occurring. ","sentUtc":"2017-02-13","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-13T07:17:49-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-13T07:17:49-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-13T07:17:49-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170208\/2013Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETakawangha  (VNUM #311090)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 52 min W 178 deg 1 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4754 ft (1449 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe energetic earthquake swarm on Tanaga Island that began on January 23, 2017, has declined significantly and seismicity is near background levels. Therefore, AVO is lowering the Aviation Color Code to GREEN and Alert Level to NORMAL for Takawangha volcano.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETakawangha is a remote, 1,449 m (4,754 ft)-high stratovolcano located on the northeast portion of Tanaga Island, roughly 95 km (59 miles) west of Adak in the Andreanof Islands. Takawangha's summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. Takawangha lies across a saddle from historically active Tanaga volcano to the west. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Earthquake swarm has ended.","sentUtc":"2017-02-08","obs":"avo","vName":"Takawangha","vnum":"311090","noticeId":"DOI-USGS-AVO-2017-02-08T10:25:11-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-08T10:25:11-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-08T10:25:11-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170204\/0224Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A86\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic tremor began at Bogoslof at 1:41 UTC on February 4  (16:42, February 3 AKST) and is continuing.   No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are likely occurring.  Winds are towards the north over the Bering Sea. We are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. This will be revised as new information becomes available. Please see the NWS AAWU at http:\/\/www.weather.gov\/aawu\/sigmets for updated information on aviation warning messages.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone detected yet\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity occurring. Eruption in progress. No ash detected yet in satellite images.","sentUtc":"2017-02-04","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-03T18:03:03-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-03T18:03:03-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-03T18:03:03-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170203\/2305Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A87\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent satellite observations indicate that a new lava dome has been extruded and is partially filling the summit crater at Cleveland volcano.  The new dome is about 70 m (230 feet) in diameter and is similar in size to previous lava domes that have developed on the floor of the crater. When lava domes have developed within the summit crater, explosive activity has sometimes followed. The extrusion of the lava dome and the increased potential for explosive activity prompts AVO to  change the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano is not monitored with a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of satellite, infrasound, lightning data and local observations. AVO is monitoring the unrest at Cleveland volcano as closely as possible and will release additional information if or when it becomes available. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo volcanic clouds observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano elevated to ORANGE\/WATCH","sentUtc":"2017-02-03","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2017-02-03T14:29:16-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-03T14:29:16-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-03T14:29:16-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170202\/2051Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A85\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe level of unrest at Pavlof has gradually decreased to background levels over the past several months. Therefore we are lowering the Aviation Color Code to GREEN and the Alert Level to NORMAL. No activity has been observed in satellite data since January 8 when weakly elevated surface temperatures were detected. Seismic levels are considered to be at background levels. Occasional, small, low frequency events continue to be seen in seismic data and are consistent with an open degassing system. Low-level steam and gas plumes from the summit are likely to be seen when meteorological conditions are favorable.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption at Pavlof has ended","sentUtc":"2017-02-02","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2017-02-02T10:39:18-09:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-02T10:39:18-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-02T10:39:18-09:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170201\/2006Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A84\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo new volcanic emissions have been detected from Bogoslof Volcano since the activity that began at 5:20 UTC, January 31 (20:20 AKST, January 30).   No detectable activity has been observed in recent seismic, infrasound or lightning data.  AVO is reducing the Aviation Color code to ORANGE and the Alert Level to WATCH.   High winds in the region are being seen on seismic and infrasound stations making it difficult to detect smaller signals from Bogoslof.  Significant ash-producing explosions could occur at any time, with no detectable precursors. Low-level activity below our detection limit is possible and may present a hazard in the immediate vicinity of the island.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN\/A\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive emissions from Bogoslof have ceased. ","sentUtc":"2017-02-01","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-02-01T09:42:42-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-02-01T09:42:42-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-02-01T09:42:42-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170131\/0725Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A82\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EBursts of explosive activity that began at 5:20 UTC are continuing and intensifying. More than 10 short-duration explosions have been detected in seismic, infrasound and lightning data. Several discrete volcanic clouds have been observed in satellite data. The intensity of these events are increasing, as is the altitude of the volcanic clouds. Thus, AVO is raising the Aviation Color Code to RED and Alert level to Warning for Bogoslof volcano.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite data through 07:00 UTC shows a volcanic cloud with an estimated altitude of 20,000 ft asl moving towards the east.  Activity is ongoing and additional explosive events may occur. A status update will be issued as conditions warrant. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMoving towards the east\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease reference the National Weather Service Alaska Aviation Weather Unit for current information on the volcanic cloud movement. http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive emission from Bogoslof intensify. Estimated altitude to at least 20,000 ft asl.","sentUtc":"2017-01-31","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-30T21:22:14-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-30T21:22:14-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-30T21:22:14-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170131\/0617Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A81\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeveral short bursts of activity have been detected in seismic data beginning at 5:20 and at 6:08 UTC.   An infrasound  signal accompanied the first event indicating an explosive emission from Bogoslof.  An eruption cloud has been observed in satellite data at 5:30 UTC to an altitude of 20,000 ft above sea level by the National Weather Service. We are evaluating the cloud height as new data comes in and will update if needed. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe Aviation Color Code remains at ORANGE and the Volcano Alert Level at WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Einitial estimate\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease reference the National Weather Service Alaska Aviation Weather Unit for current information on the volcanic cloud movement. http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive emission from Bogoslof detected. Estimated altitude of 20,000 ft asl.","sentUtc":"2017-01-31","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-30T20:45:56-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-30T20:45:56-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-30T20:45:56-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170128\/0043Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A53\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof volcano since the explosion today at 08:24 AKST (17:24 UTC). No detectable activity observed in seismic, infrasound or lightning data. We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Significant ash-producing explosions could occur at any time, with no detectable precursors. Low-level activity below our detection limit is possible and may present a hazard in the immediate vicinity of the island.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe volcanic cloud from the eruption this morning has dissipated and the SIGMET aviation warning message that is issued by the National Weather Service expired today at 11:15 AKST (2215 UTC) \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code and Volcano Alert Level reduced to Orange\/Watch.","sentUtc":"2017-01-28","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-27T15:35:16-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-27T15:35:16-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-27T15:35:16-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170127\/1831Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A27\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELightning and seismicity increase indicate a significant explosive eruption began at 08:24 AKST (17:24 UTC). We are thus raising the color code to RED and alert level to WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite data suggests volcanic cloud may be as high as 25,000 ft asl. The current eruption SIGMET issued by the National Weather Service is up to 30,000 ft asl, but may be updated. We are actively evaluating data sources and will provide an update as necessary.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E25,000 ft asl from satellite data\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESIGMET currently to 30,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease refer to the NWS Alaska Aviation Weather unit for updated information on the volcanic cloud forecast.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lightning and seismicity indicate explosive eruption began at began at 08:24 AKST (17:24 UTC)","sentUtc":"2017-01-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-26T06:58:03-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-26T06:58:03-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-26T06:58:03-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170127\/1737Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A46\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in seismicity at Bogoslof began at 7:47 AKST (16:47 UTC) suggests that an explosive event likely underway or imminent. As of yet, there are no additional indications of eruptive activity in satellite, lightning or infrasound data. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAt present, the Aviation Color Code remains at ORANGE and the Alert Level at Watch.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed yet\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity suggests that an explosive eruption is likely underway or imminent. ","sentUtc":"2017-01-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-27T08:25:45-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-27T08:25:45-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-27T08:25:45-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170127\/0250Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A44\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion that began today at 06:50 AKST (15:50 UTC). The volcanic ash cloud from that explosion has dissipated and the SIGMET warning for aviation (issued by the National Weather Service) was cancelled today at 13:36 AKST (22:36 UTC). No detectable activity observed in seismic, infrasound or lightning data. We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Reducing color code and alert level. No further ash emissions detected since this morning.","sentUtc":"2017-01-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-26T17:40:51-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-26T17:40:51-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-26T17:40:51-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170126\/1616Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A28\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELightning and seismicity increase indicate an explosive eruption began at 06:50 AKST (15:50 UTC). A larger burst of seismicity occurred at 07:06 AKST (16:06 UTC). We do not yet have information on volcanic cloud height, but comparison to seismicity from previous events suggests that this event may be similarly energetic. We are thus raising the color code to RED and alert level to WARNING. We are still evaluating data and will provide an update as necessary.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nLower level winds (below 10,000 ft asl) are currently to the southeast and to the northeast at higher altitudes. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lightning and seismicity indicate explosive eruption began at 06:50 AKST (15:50 UTC).","sentUtc":"2017-01-26","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-26T07:10:26-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-26T07:10:26-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-26T07:10:26-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170126\/1117Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A78\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in seismicity at about 01:34 AKST (10:24 UTC), as detected on neighboring islands, suggests that an explosive eruption may be imminent. We have detected no lightning nor seen any activity in recent satellite images. We will provide more information as it becomes available. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF \u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests eruption imminent or low level eruption occurring.","sentUtc":"2017-01-26","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-26T02:06:40-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-26T02:06:40-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-26T02:06:40-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170125\/0158Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A72\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion today at 04:53 AKST (13:53 UTC). No detectable activity observed in seismic, infrasound or lightning data.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe volcanic cloud from the eruption this morning has dissipated and the SIGMET aviation warning message that is issued by the National Weather Service expired today at 11:06 AKST (2206 UC)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No further explosive activity detected or observed since 04:53 AKST (13:53 UTC) today. ","sentUtc":"2017-01-25","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-24T16:04:34-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-24T16:04:34-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-24T16:04:34-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170124\/1846Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETakawangha  (VNUM #311090)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A71\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 52 min W 178 deg 1 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4754 ft (1449 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn energetic earthquake swarm on Tanaga Island started yesterday, January 23, and is continuing.  The earthquakes locate  6 to 7 km ESE of Takawangha Volcano.  This activity may be due to brittle failure in the surrounding rock caused by magma movement.  AVO is therefore raising the Aviation Color Code to Yellow and Alert Level to Advisory for Takawangha Volcano.  No eruptive activity has been detected in satellite data.   \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETakawangha is a remote, 1,449 m (4,754 ft)-high stratovolcano located on the northeast portion of Tanaga Island, roughly 95 km (59 miles) west of Adak in the Andreanof Islands. Takawangha's summit is mostly ice-covered, except for four young craters that have erupted ash and lava flows in the last few thousand years. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. Takawangha lies across a saddle from historically active Tanaga volcano to the west. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Energetic earthquake swarm detected.  ","sentUtc":"2017-01-24","obs":"avo","vName":"Takawangha","vnum":"311090","noticeId":"DOI-USGS-AVO-2017-01-24T09:04:50-09:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-24T09:04:50-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-24T09:04:50-09:00","nvewsThreat":"Low Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170124\/1415Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A69\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EFollowing a period of increasing seismicity, an explosive eruption started at 04:53 AKST (13:53 UTC) this morning as shown in seismic data and by lightning detection. We have not yet observed a volcanic cloud in satellite, but based on recent events with similar seismicity and lightning, we are raising the Aviation Color Code to RED and Alert Level to Warning. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot yet observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Ewinds to the east\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption at 04:53 AKST confirmed by seismic data and lightning. ","sentUtc":"2017-01-24","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-24T05:01:35-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-24T05:01:35-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-24T05:01:35-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170123\/2221Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A65\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Sunday, 22 January 2017 at 14:09 AKST (23:09 UTC). Seismic data flow, which had been interrupted by severe weather, has been restored. Seismicity remains low. We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No further explosive activity detected or observed since Sunday 22 January 2017.","sentUtc":"2017-01-23","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-23T13:11:26-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-23T13:11:26-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-23T13:11:26-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170122\/2349Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A64\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption today around 14:09 AKST (23:09 UTC), first detected by lightning, has produced a volcanic cloud seen in satellite images moving north of Bogoslof and reaching as high as 30,000 ft asl. We are raising the Aviation Color Code to RED and the Volcano Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHigh winds due to a storm in the area are hindering our ability to detect the eruption in seismic data. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E30,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enorth of volcano\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption confirmed. Volcanic cloud to 30,000 ft asl north of volcano in satellite. ","sentUtc":"2017-01-22","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-22T14:44:45-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-22T14:44:45-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-22T14:44:45-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170122\/2331Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A62\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeveral lightning strikes north of Bogoslof suggest that an eruption occurred around 14:09 AKST (23:09 UTC). High winds due to a storm in the area are hindering our ability to detect the eruption in seismic data. No volcanic cloud visible in satellite data at this time. We will put out more information as it becomes available. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, data from distant seismic and infrasound instruments, and information from the Worldwide Lightning Location Network for indications of significant activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lightning strikes around Bogoslof suggest eruption around 14:09 AKST (23:09 UTC)","sentUtc":"2017-01-22","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-22T14:18:40-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-22T14:18:40-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-22T14:18:40-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170121\/2141Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A52\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Friday, 20 January at 13:17 AKST (22:17 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new actvity since eruption at 22:17 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-01-21","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-21T12:33:46-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-21T12:33:46-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-21T12:33:46-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170120\/2230Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A47\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EExplosive eruption of Bogoslof confirmed, starting at approximately 13:17 AKST (22:17 UTC) based on seismic data and lightning detected from the World Wide Lightning Location Network. A volcanic plume is not yet visible in satellite data. Winds are currently to the southeast. More information to follow. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are raising the Aviation Color Code to RED and the Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, data from distant seismic and infrasound instruments, and information from the Worldwide Lightning Location Network for indications of significant activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption occurred at 13:17 AKST (22:17 UTC)","sentUtc":"2017-01-20","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-20T13:20:54-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-20T13:20:54-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-20T13:20:54-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170120\/2210Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A45\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in seismicity starting at about 13:00 AKST (22:00 UTC) suggests an explosive eruption of Bogoslof may be imminent. We will issue more information as it becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests explosive eruption may be imminent. ","sentUtc":"2017-01-20","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-20T12:45:19-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-20T12:45:19-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-20T12:45:19-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170119\/2148Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A40\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Wednesday, 18 January at 13:20 AKST (22:20 UTC) and seismicity remains low.  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new actvity since eruption at 22:20 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-01-19","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-19T12:35:25-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-19T12:35:25-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-19T12:35:25-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170118\/2259Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A35\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EExplosive eruption of Bogoslof confirmed, starting at approximately 13:20 AKST (22:20 UTC). Ash cloud is at least as high as 31,000 ft asl as noted in pilot reports. Volcanic cloud observed in satellite images generally moving to northeast. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWe are raising the Aviation Color Code to RED and the Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, data from distant seismic and infrasound instruments, and information from the Worldwide Lightning Location Network for indications of significant activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eat least 31,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption occurred. Volcanic cloud to at least 31,000 ft asl as observed by pilots.","sentUtc":"2017-01-18","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-18T13:51:08-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-18T13:51:08-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-18T13:51:08-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170118\/2215Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A33\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn increase in seismicity starting at about 13:00 AKST (22:00 UTC) suggests an explosive eruption of Bogoslof may be imminent. We will issue more information as it becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests explosive eruption imminent. ","sentUtc":"2017-01-18","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-18T13:09:43-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-18T13:09:43-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-18T13:09:43-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170117\/1756Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A22\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EIncreased seismic activity over the past several hours indicates that minor explosive activity is occurring at Bogoslof. The level of activity is variable, with the most energetic events observed around 1500 UTC and 1640 UTC (4:00 and 7:40 am AKST). Minor emissions of steam and minor amounts of volcanic ash observed in satellite data around 1500 and 1730 UTC. These events were too small to generate detectable lightning or infrasound (pressure) signals. The National Weather Service has estimated a maximum altitude for these small clouds at 15,000 ft above sea level. Satellite data showed that they dissipated quickly. The volcano remains restless and additional explosive events could occur with little warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E15,000 ft asl (maximum)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMinor emissions visible in satellite data\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests minor explosive eruption occurring. ","sentUtc":"2017-01-17","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-17T08:43:31-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-17T08:43:31-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-17T08:43:31-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170115\/0650Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A19\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity increased starting at about 21:26 AKST (06:26 Jan 15 UTC) suggesting an explosive eruption of Bogoslof is likely occurring. We will issue more information as it becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests explosive eruption occurring. ","sentUtc":"2017-01-15","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-14T21:44:28-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-14T21:44:28-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-14T21:44:28-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170112\/2235Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A18\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA second explosive event has been detected at Bogoslof volcano.  An abrupt increase in seismicity began at about 21:35 UTC (12:35 AKST).  Both events have been observed by pilots. The first event at 20:23 UTC produced an eruption cloud to 18,000 ft asl. The estimated height of the second event from 21:35 UTC was 14,500 ft asl.  Neither eruption cloud has been visible yet in subsequent satellite data.  The altitude of the meteorological cloud deck is variable from about 10,000 ft to 12,000 ft. Additional ash-producing eruptions may occur at any time with limited precursory unrest and little warning. AVO is monitoring the volcano closely and will provide additional information if and when it becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETwo events: First 18,000 ft. Second 14,500 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeight from pilot reports. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Second explsoive event. Eruption cloud to 14,500 from PIREP.","sentUtc":"2017-01-12","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-12T13:08:22-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-12T13:08:22-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-12T13:08:22-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170112\/2048Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A17\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe level of seismic activity at Bogoslof volcano increased abruptly at about 20:23 (11:23 AKST) and persisted at a high level until about 20:29 UTC (11:29 AKST). Previous increases in seismicity similar to this one have resulted in volcanic plumes as high as about 30,000 feet asl. Nothing yet has been observed in satellite data and lightning has not been detected but a plume likely has been generated. It remains possible for additional ash-producing eruptions to occur at any time with limited precursory unrest and little warning. AVO is monitoring the volcano closely and will provide additional information if and when it becomes available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity has increased; brief eruption likely.","sentUtc":"2017-01-12","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-12T11:34:03-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-12T11:34:03-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-12T11:34:03-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170110\/1802Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A16\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe level of seismic activity at Bogoslof volcano has declined and no further volcanic emissions have occurred since the two strong eruptive pulses on January 8, 2017 at about 22:33 and 22:56 AKST (07:33 and 07:56 Jan 9 UTC). We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. It remains possible for additional ash-producing eruptions to occur at any time with limited precursory unrest and little warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity has declined; the volcano remains restless and unpredictable.","sentUtc":"2017-01-10","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-10T08:23:56-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-10T08:23:56-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-10T08:23:56-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170109\/0754Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A14\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EExplosive eruption of Bogoslof occurred starting around 22:23 AKST (07:23 Jan 9 UTC) as detected in seismic and infrasound data, with the strongest signal at about  22:31 AKST (07:31 Jan 9 UTC). Seismic signal declined around 22:38 AKST (07:38 Jan 9 UTC) but is still above background. We do not yet have any satellite images of a cloud but seismicity suggests an event at least as large as others in the recent sequence. We are raising Aviation Color Code to RED and Volcano Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWinds are currently out of the southeast.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption started about 22:23 AKST (07:23 Jan 9 UTC). ","sentUtc":"2017-01-09","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-08T22:37:29-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-08T22:37:29-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-08T22:37:29-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170109\/0732Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity as detected on nearby islands is elevated and increasing in intensity, suggesting that an explosive eruption is likely imminent or has commenced. No lightning has been detected nor any cloud visible in satellite. We will provide more information as it becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of any ash clouds can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity suggests eruption may be imminent or occurring.","sentUtc":"2017-01-09","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-08T22:16:00-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-08T22:16:00-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-08T22:16:00-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170106\/2051Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof Volcano since the explosion on Thursday, January 5 at 13:24 AKST (22:24 UTC).  We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot applicable\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new actvity since eruption at 22:24 UTC.  Color code lowered to ORANGE. ","sentUtc":"2017-01-06","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-06T11:28:37-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-06T11:28:37-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-06T11:28:37-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170105\/2242Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO has just detected an escalation in seismicty beginning at about 13:24 January 5 AKST (22:24 UTC)  from Bogoslof volcano.  This activity is accompanied by lightning strikes detected by the World Wide Lightning Detection Network indicating that a significant explosion has occurred.  Based on the intensity of these signals AVO is raising the Aviation Color Code to RED and Alert Level to WARNING.  More details will be provided as they become available.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot yet available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot yet available\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption began at 22:24 UTC.  Color code raised to RED. ","sentUtc":"2017-01-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-05T13:33:15-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-05T13:33:15-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-05T13:33:15-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170105\/2047Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof since Tuesday, January 3 at 21:18 AKST (6:18 UTC January 4).  AVO is therefore lowering the Aviation Color Code to ORANGE and Alert Level to WATCH.  Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENA\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new actvity detected.  Lowering color code to ORANGE","sentUtc":"2017-01-05","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-05T09:39:57-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-05T09:39:57-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-05T09:39:57-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170104\/0704Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic data from nearby islands detected a volcanic signal from Bogoslof volcano starting at  21:18 AKST today (6:18 UTC Jan 4) lasting ~5 minutes and a series of lightning strikes were identified by the World Wide Lightning Location Network.  An eruption cloud as high as 33,000 ft has been detected in satellite data.  AVO is therefore raising the Aviation Color Code for Bogoslof to RED and Volcano Alert Level to Warning.   \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAs high as 33,000 asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Emoving north\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash-producing eruption at 21:18 AKST (06:18 UTC Jan 4).  Eruption cloud up to 33,000 ft.","sentUtc":"2017-01-04","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-03T21:35:43-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-03T21:35:43-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-03T21:35:43-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170102\/2348Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic data from nearby islands detected a volcanic signal from Bogoslof volcano starting at 13:53 AKST (22:53 UTC) today lasting ~10 minutes. Infrasound (pressure) sensors near Cleveland volcano also detected a signal from Bogoslof, indicating an ash-producing eruption likely occurred. No lightning strikes were identified by the World Wide Lightning Location Network, and no ash-plume above the regional cloud deck (18,000 ft asl) was identified in satellite data over the past 40 minutes. The short duration of seismicity and lack of evidence for ash above the clouds in satellite data suggest this was likely a relatively minor explosion. The current Aviation Color Code remains ORANGE and Volcano Alert Level WATCH.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELess than 18000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Likely ash-producing eruption began at 13:53 AKST (22:53 UTC) today","sentUtc":"2017-01-02","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-28T19:54:36-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-28T19:54:36-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-28T19:54:36-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20170101\/1932Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2017\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof since Friday, December 30 at 22:30 AKST (07:30 UTC Dec 31). We are thus lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, information from the Worldwide Lightning Location Network pertaining to volcanic-cloud lightning, and data from seismic and infrasound instruments on other islands for indications of volcanic activity. At present, these observations should allow timely detection of additional explosive events. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003En\/a\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected since December 30\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No explosive eruptions detected since Friday December 30. Volcano still restless. ","sentUtc":"2017-01-01","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2017-01-01T09:47:55-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2017-01-01T09:47:55-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2017-01-01T09:47:55-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161230\/1010Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn ash-producing eruption started at 23:45 Dec 29 AKST (08:45 Dec 30 UTC) and is continuing as recorded by seismic data on nearby islands and as seen in recent satellite images. Cloud-top temperatures from satellite suggest a cloud height of around 20,000 ft asl. Regional winds are from the southwest. We are raising the Aviation Color Code to RED and the Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, information from the Worldwide Lightning Location Network pertaining to volcanic-cloud lightning, and data from seismic and infrasound instruments on other islands for indications of volcanic activity. At present, these observations should allow timely detection of additional explosive events.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELikely around 20,000 ft asl from satellite\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds are from southwest\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash-producing eruption started at 23:45 Dec 29 AKST (08:45 Dec 30 UTC) and is continuing.","sentUtc":"2016-12-30","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-30T00:50:00-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-30T00:50:00-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-30T00:50:00-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161230\/0843Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic data from nearby islands detected an increase in discrete volcanic seismicity from Bogoslof volcano starting at 19:00 Dec 29 AKST (04:00 UTC Dec 30) today. The activity progressed, merging into a continuous tremor sequence indicative of a possible ash-producing eruption, as was seen with the eruption on December 21. Nothing has yet been observed in satellite data and no lightning strikes associated with an ash cloud have yet been detected. We will provide additional details once they are available.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Possible ash-producing eruption began at 23:30 AKST (08:30 UTC Dec 29) today","sentUtc":"2016-12-30","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-29T23:39:52-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-29T23:39:52-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-29T23:39:52-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161229\/0404Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic data from nearby islands detected a volcanic signal from Bogoslof volcano starting at 05:55 AKST (02:55 UTC Dec 29) today. These observations suggest an ash-producing eruption may have occurred. Nothing has yet been observed in satellite data, but the region is covered in high clouds which may prevent such observations. We will provide additional details once they are available.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Likely ash-producing eruption began at 05:55 AKST (02:55 UTC Dec 29) today","sentUtc":"2016-12-29","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-27T13:51:05-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-27T13:51:05-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-27T13:51:05-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161227\/2156Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof since the explosive eruption yesterday at 14:05 AKST (23:05 UTC).  There has been no indication of elevated seismicity occurring from Bogoslof as measured on nearby island networks over the past 22 hours, however high winds in the region may have obscured volcanic signals over the first 15 hours of this period. While the possibility of further ash-producing eruptions is still present, we are unable to state that such activity is imminent. We are thus lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, information from the Worldwide Lightning Location Network pertaining to volcanic-cloud lightning, and data from seismic and infrasound instruments on other islands for indications of volcanic activity. At present, these observations should allow timely detection of additional explosive events. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eno cloud\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Eno cloud\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Unrest at Bogoslof continues, but has been low-level since yesterday's explosion.","sentUtc":"2016-12-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-27T12:14:22-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-27T12:14:22-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-27T12:14:22-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161227\/0016Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn ash-producing eruption started at 14:05 AKST (23:05 UTC) today and is continuing as recorded by seismic data on nearby islands, by lightning, and as seen in recent satellite images. Cloud-top temperatures from satellite suggest a cloud height of around 30,000 ft asl. Regional winds are from the west-southwest.  We are raising the Aviation Color Code to RED and the Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, information from the Worldwide Lightning Location Network pertaining to volcanic-cloud lightning, and data from seismic and infrasound instruments on other islands for indications of volcanic activity. At present, these observations should allow timely detection of additional explosive events. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELikely around 30,000 ft asl from satellite\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWinds are from west-southwest\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash-producing eruption started at 14:05 AKST (23:05 UTC) today and is continuing.","sentUtc":"2016-12-27","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-26T14:48:28-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-26T14:48:28-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-26T14:48:28-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161225\/0457Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further ash emissions have occurred at Bogoslof since the explosive eruption yesterday at 09:30 AKST (18:30 UTC). Seismicity attributed to the ongoing volcanic unrest has been periodically visible on nearby island networks in the past day and a half, but levels have been generally low since the explosion yesterday. While the possibility of further ash-producing eruptions is still present, we are unable to state that such activity is imminent. We are thus lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, information from the Worldwide Lightning Location Network pertaining to volcanic-cloud lightning, and data from seismic and infrasound instruments on other islands for indications of volcanic activity. At present, these observations should allow timely detection of additional explosive events. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone detected\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Unrest at Bogoslof continues, but has been low-level since yesterday's explosion.","sentUtc":"2016-12-25","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-24T19:15:00-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-24T19:15:00-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-24T19:15:00-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161223\/2012Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption occurred at Bogoslof this morning at about 09:30 AKST (18:30 UTC).  A Coast Guard ship in the vicinity reported ash emission as well as ejection of lava and fragmental material.  The eruption cloud did not penetrate the regional cloud tops at 30,000 ft and winds are to the north-northeast.  According to the Coast Guard, ash emission subsided at about 10:37 AKST (19:37 UTC). On the basis of this information, the Aviation Color Code is raised to RED and the Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We will monitor satellite images and data from distant seismic and infrasound instruments for indications of significant explosive activity, although high winds in the are presently limit detection abilities. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBelow 30,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/ \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-lived explosive eruption","sentUtc":"2016-12-23","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-23T10:52:48-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-23T10:52:48-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-23T10:52:48-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161222\/0818Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe explosive eruption that started at about 01:10 UTC 12\/22 (16:10 AKST today) was short-lived and produced an ash cloud as high as 35,000 ft asl that drifted northward.  Seismic data recorded on neighboring island networks indicates that the eruption lasted about 30 minutes after which seismicity rapidly declined and remains low. No activity has been observed in recent satellite images or infrasound data.  On the basis of this information, the Aviation Color Code is lowered to ORANGE and the Alert Level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We will monitor satellite images and data from distant seismic and infrasound instruments for indications of significant explosive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enone detected\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStatus of the ash cloud can be found at the Alaska Aviation Weather Unit website at http:\/\/aawu.arh.noaa.gov\/ \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity declines following eruption prompting color code reduction","sentUtc":"2016-12-22","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-21T20:06:56-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-21T20:06:56-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-21T20:06:56-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161222\/0232Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption started at about 01:10 UTC 12\/22 (16:10 AKST today) as seen in satellite and seismic data from neighboring islands and appeared to last for about 30 minutes. Cloud-top temperatures and wind direction suggest the cloud is as high as 35,000 ft asl, and is moving to the north. On the basis of this information, the Aviation Color Code is raised to RED and the Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has no ground-based volcano monitoring equipment on Bogoslof volcano and is unable to provide a forecast of future eruptive activity. We will monitor satellite images and data from distant seismic and infrasound instruments for indications of significant explosive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E35,000 ft asl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EDrifting north\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive eruption started at about 01:10 UTC (16:10 AKST). Ash cloud to 35,000 ft asl.","sentUtc":"2016-12-22","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-21T17:06:48-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-21T17:06:48-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-21T17:06:48-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161221\/0605Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe explosive eruption of Bogoslof volcano that occurred today at about 00:35 UTC (3:35 pm AKST) was short-lived, lasting approximately 30 minutes, and produced a detached ash cloud that rose to 34,000 ft (10.3 km) above sea level as reported by several pilots.  A subsequent pilot report from 01:50 UTC (4:30 pm AKST) indicated that activity had decreased and the cloud was dispersing.  The ash cloud was carried southward over the Gulf of Alaska and no ash fell on inhabited areas. No further explosions have been detected in seismic and infrasound networks indicating that the activity has subsided.  No activity is apparent in recent nighttime satellite images.   \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOn the basis of this information, the Aviation Color Code is lowered to ORANGE and the Volcano Alert Level to WATCH. AVO has no ground-based volcano monitoring equipment on Bogoslof volcano and is unable to provide a forecast of future eruptive activity. We will monitor satellite images and data from distant seismic and infrasound instruments for indications of significant explosive activity. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSome previous eruptions of Bogoslof have lasted for weeks to months, and further explosive activity could occur with little warning.  Mariners in the area should use caution.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone currently observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, DGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No further explosive eruptive activity at Bogoslof indicated in seismic and satellite data.","sentUtc":"2016-12-21","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-20T20:06:33-09:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-20T20:06:33-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-20T20:06:33-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161221\/0220Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBogoslof  (VNUM #311300)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 55 min W 168 deg 2 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E492 ft (150 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA short-lived explosive eruption of Bogoslof volcano was reported by several pilots around 0100 UTC (4:00 pm AST). They reported a volcanic ash cloud rising to an estimated altitude of 34,000 ft (10.3 km). Satellite data show a discrete, short-lived explosion just prior to 0100 UTC that detached and drifted to the south by 0115 UTC. A subsequent pilot report from 0150 UTC indicated that activity had decreased. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOn the basis of this information, the Aviation Color Code is increased to Red and the Volcano Alert Level to Warning. There is no ground-based volcano monitoring equipment on Bogoslof volcano so AVO is unable to provide a forecast of future eruptive activity. We will monitor satellite images and data from distant seismic and infrasound instruments for indications of significant explosive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E34,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeight based on pilot report.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-lived explosive eruption reported by pilots and observed in satellite data.","sentUtc":"2016-12-21","obs":"avo","vName":"Bogoslof","vnum":"311300","noticeId":"DOI-USGS-AVO-2016-12-20T16:49:26-09:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-12-20T16:49:26-09:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-12-20T16:49:26-09:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161104\/2027Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo activity has been observed at Cleveland following the explosion on October 24th. No change in seismicity occurred after the explosion, and there have been no infrasound (pressure sensor) signals detected. Recent satellite views indicate that the lava dome emplaced in late May was mostly destroyed in the explosion and has been replaced with a deep pit within the summit crater. Based on low seismic levels since the eruption, and no observations or reports of continued eruptive activity, AVO is reducing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo volcanic clouds observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano reduced to YELLOW\/ADVISORY","sentUtc":"2016-11-04","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2016-11-04T11:56:51-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-11-04T11:56:51-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-11-04T11:56:51-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20161024\/2219Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO detected an explosion at Cleveland Volcano in both infrasound (air pressure) and seismic data today (10\/24\/2016) at 13:10 AKDT (21:10 UTC).  Residents in Nikolski 45 miles (75 km) from Cleveland reported hearing the explosion.  Cloudy weather obscures the volcano in satellite images from 13:30 AKDT (21:30 UTC), however no evidence of an eruption cloud is detected above the weather cloud deck height of 28,000 ft.  The summit is currently obscured by cloudy weather in web camera images.  Previous Cleveland explosions have typically produced ash emissions.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is raising the color code\/alert level of Cleveland Volcano from YELLOW\/ADVISORY to ORANGE\/WATCH.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo ash cloud observed above met. cloud deck of 28,000 ft.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Raising the color code\/alert level for Cleveland to Orange\/Watch following an explosion.","sentUtc":"2016-10-24","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2016-10-24T13:48:13-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-10-24T13:48:13-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-10-24T13:48:13-08:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160804\/1921Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A86\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruptive activity that was observed intermittently since July 28 has ended or paused. Over the past several days there has been no evidence for continued ash emissions or signs of near surface magma in satellite data. As a result, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOccasional views of the volcano in web camera images show small steam plumes at the summit. Seismic activity remains slightly above background levels. Satellite views have been obscured by clouds and intermittent partly clear views of the summit have showed only weakly elevated surface temperatures in one image on 2 August. At the present level of unrest, it is possible for activity to escalate rapidly and for ash emissions to recommence with only subtle precursory signals.  AVO will continue to monitor the volcano closely. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\n jfreymueller@alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Unrest has declined to near background levels","sentUtc":"2016-08-04","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-08-04T09:47:08-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-08-04T09:47:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-08-04T09:47:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160728\/1955Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A82\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ELow-level eruptive activity observed in web camera and satellite images of Pavlof. Vigorous, steam-rich degassing was observed in web camera images this morning. Recent satellite images and a pilot report provide evidence of minor ash emissions associated with the degassing. Seismic tremor continues at amplitudes similar to the previous several days. This unrest prompts AVO to raise the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nActivity is currently at relatively low levels. An increase in eruptive activity is possible and could occur with little or no warning. AVO will continue to monitor the volcano closely. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMaximum altitude currently below 15,000 ft msl\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMixture of steam and ash. Satellite discrimination of ash and PIREP of steam\/ash.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Paskievitch, Acting Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\njpaskie@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\n jfreymueller@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Low-level eruptive activity observed in web camera and satellite images of Pavlof.","sentUtc":"2016-07-28","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-07-28T11:14:08-08:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-07-28T11:14:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-07-28T11:14:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160701\/1944Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A24\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Pavlof Volcano has increased in the past 24 hours, and minor steam emissions were observed in web camera images this morning.  This unrest prompts AVO to raise the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPauses in eruptive activity lasting for weeks to months have occurred during past eruptive episodes of Pavlof Volcano, and a return to robust eruptive activity remains an ongoing possibility and could occur with little or no warning. AVO will continue to monitor the volcano closely. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS \u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI \u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in seismicity, minor steam plume observed in webcamera","sentUtc":"2016-07-01","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-07-01T10:58:08-08:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-07-01T10:58:08-08:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-07-01T10:58:08-08:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160617\/1901Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EPavlof Volcano has returned to its normal background state following a short eruptive period in mid May. Minor ash emissions were last observed on May 16, and since then the volcano has gradually returned to a quiescent status and now shows no signs of unrest. Seismic activity has returned to background levels and nothing unusual has been observed in satellite and web camera data since mid May. Consequently, AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPauses in eruptive activity lasting for weeks to months have occurred during past eruptive episodes of Pavlof Volcano. A return to robust eruptive activity remains an ongoing possibility and could occur with little or no signs of impending unrest. AVO will continue to monitor the volcano closely and planned field visits to the volcano over the next several months will restore equipment damaged by the May eruption to full operational capacity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 feet above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Paskievitch, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpaskie@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller,Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No signs of unrest observed in satellite or web camera images.  Seismicity remains at background. ","sentUtc":"2016-06-17","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-06-17T19:01:34-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-06-17T19:01:34-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-06-17T19:01:34-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160603\/1912Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo major activity has been observed at Cleveland Volcano since satellite data confirmed the eruption of a small volume lava dome within the summit crater on May 18.  Weakly elevated surface temperatures have been detected in satellite data from the past day that are consistent with cooling lava and are not considered to be indicative of new activity.  Seismic activity has remained low since explosions were detected in infrasound (pressure sensor) and seismic data on May 5 and May 10.  Based on seismic levels remaining low and no observations nor reports of continued eruptive activity, AVO is reducing the Aviation color code to YELLOW and the Volcano Alert Level to ADVSIORY.        \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller,Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"AVO is lowering the Aviation color code to Yellow, Volcano Alert level to Advsiory.","sentUtc":"2016-06-03","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2016-06-03T19:12:34-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-06-03T19:12:34-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-06-03T19:12:34-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160520\/1935Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe recent period of eruptive activity at Pavlof Volcano that began on May 13, 2016 has ended. Minor ash emissions were last observed on May 16. Since then, we have not detected seismic signals associated with ash emission or lava effusion. Satellite observations show no evidence for eruptive activity. Thus AVO is lowering the Aviation color code and Volcano Alert Level to YELLOW\/ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe volcano remains in a heightened state of unrest. Pauses in eruptive activity of days to weeks are common during eruptive episodes of Pavlof Volcano. A return to eruptive activity remains possible and could occur with little or no warning. Thus, AVO will continue to monitor the volcano closely and will issue additional information as necessary. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot detected or observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo ash emissions detected or observed since May 16, 2016.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption has ended. Unrest continues. Seismicity is low. ","sentUtc":"2016-05-20","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-05-20T19:35:39-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-05-20T19:35:39-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-05-20T19:35:39-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160513\/2004Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAt about 10:35 AM AKDT seismic activity at Pavlof Volcano increased to levels typically associated with low-level eruptive activity and it is possible that an eruption of Pavlof Volcano may be in progress. Nothing has been observed in satellite data and web camera images, but Pavlof is presently obscured by clouds and no thermal signals or ash emissions are evident through the cloud deck. AVO will be monitoring Pavlof closely and will release further information as warranted.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":" Seismicity above background. Low-level eruption possibly in progress, but not confirmed. ","sentUtc":"2016-05-13","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-05-13T20:04:16-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-05-13T20:04:16-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-05-13T20:04:16-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160506\/0335Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A9\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO detected an explosion at Cleveland Volcano in both infrasound (air pressure) and seismic data this evening at 18:44 AKDT (2:44 UTC 5\/6\/2016). There are no recent satellite views since the detected explosion. However, previous Cleveland explosions have typically produced ash emissions. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDavid Fee, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndfee1@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosion detected this evening.","sentUtc":"2016-05-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2016-05-06T03:35:28-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-05-06T03:35:28-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-05-06T03:35:28-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160429\/1936Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo activity has been observed at Cleveland following the April 16 explosion.  Seismicity returned to low levels within an hour of the explosion, and there have been no infrasound (pressure sensor) signals detected.  Recent satellite views indicate that the August 2015 lava dome is gone and has been replaced with a small cinder cone within the summit crater. Based on seismic levels remaining low since the eruption, and no observations or reports of continued eruptive activity, AVO is reducing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Cleveland Volcano reduced to YELLOW\/ADVISORY","sentUtc":"2016-04-29","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2016-04-29T19:36:18-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-04-29T19:36:18-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-04-29T19:36:18-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160422\/1816Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Pavlof Volcano has continued to decrease over the past two weeks and no anomalous activity has been detected in satellite data since weakly elevated surface temperatures were seen on April 8.  AVO is therefore lowering the aviation color code to GREEN and the Volcano Alert Level to NORMAL.   \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPauses in eruptive activity lasting days to weeks have occurred during past eruptive episodes of Pavlof Volcano.  A return to robust eruptive activity remains possible and could occur with little or no warning.  AVO will continue daily routine monitoring efforts using seismic, infrasound (pressure sensor) and satellite data.   \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Status of Pavlof Volcano lowered to Aviation color code GREEN and Volcano Alert Level NORMAL.  ","sentUtc":"2016-04-22","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-04-22T18:16:27-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-04-22T18:16:27-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-04-22T18:16:27-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160416\/1955Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO detected an explosion at Cleveland Volcano in both infrasound (air pressure) and seismic data this morning at 10:58 AKDT (18:58 UTC). There are no recent satellite views since the detected explosion, but earlier views are obscured by clouds at about 30,000 feet above sea level.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Cleveland: Explosion detected today.","sentUtc":"2016-04-16","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2016-04-16T19:55:51-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-04-16T19:55:51-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-04-16T19:55:51-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160406\/1942Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe recent period of eruptive activity at Pavlof Volcano that began on March 27, 2016 has ended. Over the past week, seismicity at the volcano has remained at low levels and shows no indication of activity associated with ash emissions or lava effusion. Satellite observations show no evidence for continuing eruptive activity. Thermal signals at the summit are occasionally visible, but are likely being generated by the cooling of previously erupted lava and debris.The low levels of seismic activity and the lack of evidence for ash emissions or lava effusion indicate that the eruption has ended and thus AVO is lowering the Aviation color code and Volcano Alert Level to YELLOW\/ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPauses in vigorous eruptive activity of days to weeks are common during eruptive episodes of Pavlof Volcano. A return to robust eruptive activity remains possible and could occur with little or no warning. Thus, AVO will continue to monitor the volcano closely and will issue additional information as necessary. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVolcanic cloud not observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity has ended. The volcano remains restless and a return to robust eruptive activity is possible.","sentUtc":"2016-04-06","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-04-06T19:42:56-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-04-06T19:42:56-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-04-06T19:42:56-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160329\/0201Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe intensity of eruptive activity at Pavlof Volcano has declined significantly starting at about 12:30 pm AKDT and currently continuous ash emission from the summit vent is not being observed in satellite imagery. Thus, AVO is lowering the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. Seismicity and infrasound signals from Pavlof have dropped to low levels and it appears that the robust eruptive activity that began yesterday afternoon has declined for now. The level of seismic tremor is still slightly above background. A drifting ash cloud extending from the southern Bering Sea into interior Alaska is still present and may pose a hazard to air travel. Additional information about the ash cloud and its impacts on aviation can be found at http:\/\/aawu.arh.noaa.gov\/.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAlthough the intensity of the eruption has diminished, it is possible for conditions to change at any time and significant ash emissions may resume with little to no warning. At this reduced level of unrest, it is possible that low-level lava fountaining and minor amounts of ash emission may be occurring and affecting the area in the immediate vicinity of the volcano. AVO will continue to monitor the volcano closely.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Based on decline in seismicity, infrasound signals, and ash emission at Pavlof, Aviation Color Code is lowered to ORANGE and Volcano Alert Level to WATCH.","sentUtc":"2016-03-29","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-03-29T02:01:05-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-03-29T02:01:05-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-03-29T02:01:05-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160328\/1634Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Pavlof Volcano, that began around 4 pm AKDT yesterday (00:00 UTC) continues. Seismic tremor remains at very high levels. Lightning associated with the ash eruption has been detected this morning, and infrasound (pressure sensor) data from a sensor network located in Dillingham (400 miles or 650 km) also indicate sustained ash emissions. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAs of 7:00 AKDT (15:00 UTC) a continuous plume of ash is observed in satellite images extending for a distance of more than 400 miles (650 km) to the northeast over interior Alaska. SIGMET warning messages issued by the National Weather Service (NWS) Alaska Aviation Weather Unit indicate maximum ash cloud altitude of 37,000 ft above sea level. Please see the NWS web page for additional guidance and forecasts of ash movement. http:\/\/www.weather.gov\/aawu\/sigmets \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nLava fountaining from the summit crater was observed throughout the night by mariners, pilots, and by residents in Cold Bay, located 37 miles (60 km) to the SW, . Volcanic mudflows are likely on the flanks of the volcano and could present a hazard in the local river valleys. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E37,000 ft ASL in SIGMET\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EExtending for 400 miles to the NE as of 07:00 UTC\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption is ongoing. Ash cloud reported to 37,000 ft asl extending 400 miles to the NE.","sentUtc":"2016-03-28","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-03-28T16:34:30-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-03-28T16:34:30-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-03-28T16:34:30-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160328\/0112Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EPavlof Volcano began erupting abruptly this afternoon, sending an ash cloud to 20,000 ft ASL as reported by a pilot. As of 4:18 pm AKDT (00:18 UTC), ash was reportedly moving northward from the volcano. Seismicity began to increase from background levels at about 3:53 pm (23:53 UTC) with quick onset of continuous tremor, which remains at high levels. AVO is raising the Aviation Color Code to RED and the Volcano Alert Level to WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe view from the FAA webcamera is obscured by clouds this afternoon, and there are no current satellite images.  AVO is monitoring the situation closely and issue further updates at the situation develops.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E20,000 ft ASL\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption with little precursory activity.  Ash cloud to 20,000 ft ASL","sentUtc":"2016-03-28","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2016-03-28T01:12:43-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-03-28T01:12:43-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-03-28T01:12:43-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20160310\/2230Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2016\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThere has been a steady decrease in detected thermal activity at Shishaldin over the past several months.  No anomalous activity has been observed in several clear satellite images of Shishaldin since moderately elevated surface temperatures were detected on Jan. 13.  Airwaves associated with low-level explosive degassing have not been detected in infrasound data since Feb. 7.  Low-amplitude seismic tremor consistent with an open, degassing system continues to be seen in seismic data and is considered to be within the bounds of background activity for Shishaldin.  AVO is therefore downgrading the status of Shishaldin Volcano from aviation color code YELLOW to GREEN and from volcano alert level ADVISORY to NORMAL.  AVO will continue to monitor satellite, seismic and infrasound data from Shishaldin as part of routine monitoring operations.    \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin aviation color code is being downgraded from YELLOW to GREEN and volcano alert level from ADVISORY to NORMAL. ","sentUtc":"2016-03-10","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2016-03-10T22:30:08-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2016-03-10T22:30:08-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2016-03-10T22:30:08-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20151211\/2014Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A9\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity, indicative of unrest, at Veniaminof has decreased to near background levels during the past two weeks. Minor steaming from the intracaldera cone has not been observed since November 16. As a result, AVO is lowering the Aviation Color Code to Green and the Volcano Alert Level to Normal.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95, 2005, and 2013. These were Strombolian eruptions that produced lava fountains and minor emissions of ash and gas from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded, and in 2013, five small lava flows effused from the intracaldera cone over about five months. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 20,000 ft above sea level (1939 and 1956) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code\/Volcano Alert Level lowered to Green\/Normal. Seismicity near background. ","sentUtc":"2015-12-11","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2015-12-11T20:14:01-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-12-11T20:14:01-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-12-11T20:14:01-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20151120\/2052Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo anomalous activity at Shishaldin has been observed in satellite data since weakly elevated surface temperatures were detected on October 16.  Low-amplitude seismic tremor continues but is not considered to be indicative of an active eruption.  AVO is therefore downgrading the status of Shishaldin volcano from aviation color code ORANGE to YELLOW and from volcano alert level WATCH to ADVISORY.  AVO will continue to monitor Shishaldin with satellite, seismic and infrasound (pressure sensor) data.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Shishaldin: No activity detected in satellite data. Color code decreased to YELLOW, Alert level decreased to ADVISORY.","sentUtc":"2015-11-20","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2015-11-20T20:52:03-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-11-20T20:52:03-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-11-20T20:52:03-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20151014\/1741Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EStrongly elevated surface temperatures have not been observed at Cleveland since August 18. Moderately elevated surface temperatures have been observed with decreasing regularity since then, with the most recent instance occurring on September 30. This indicates lava effusion at the summit has likely ceased. In addition, explosive activity, as detected by infrasound, last occurred over two months ago on August 6. Based on the decline in activity, we are lowering the Level of Concern Color Code to YELLOW and the Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland is one of the most active volcanoes of the Aleutian Arc. The latest eruptive phase has waxed and waned almost annually since 2001. Renewed explosive activity and unrest could begin again with little to no precursory warning. Two seismic stations were installed at the volcano during the summer of 2014, and AVO will continue to closely monitor the volcano using seismic and infrasound data, as well as daily satellite and web camera image analysis. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Based on decline in activity over past month, Cleveland moved to YELLOW\/ADVISORY.","sentUtc":"2015-10-14","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2015-10-14T17:41:58-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-10-14T17:41:58-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-10-14T17:41:58-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20151001\/1901Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past day, seismicity at Veniaminof has increased and is ongoing in the form of volcanic tremor. Thus we are raising the the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNo eruptive activity is observed in web camera or satellite views from today. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENot observed\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95, 2005, and 2013. These were Strombolian eruptions that produced lava fountains and minor emissions of ash and gas from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded, and in 2013, five small lava flows effused from the intracaldera cone over about five months. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 20,000 ft above sea level (1939 and 1956) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased seismicity over the past day and ongoing. No signs of eruptive activity.  ","sentUtc":"2015-10-01","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2015-10-01T19:01:22-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-10-01T19:01:22-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-10-01T19:01:22-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20150721\/1713Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO detected an explosion at Cleveland Volcano in both infrasound (air pressure) and seismic data this morning at 08:17 AKDT (16:17 UTC).  Satellite views are obscured by clouds at about 30,000 feet above sea level.  No ash has been observed above the clouds at this time.  Clouds obscure views by web camera this morning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosion detected today.  ","sentUtc":"2015-07-21","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2015-07-21T17:13:03-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-07-21T17:13:03-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-07-21T17:13:03-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20150617\/2021Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated surface temperatures have been detected in satellite images at the summit of Cleveland for the past week, and an image from June 14 shows very light ash cover on the volcano's upper flanks. Thus the volcano has entered a renewed period of unrest and we are raising the Color Code to Yellow and the Alert Level to Advisory. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe increase in temperature at the summit is consistent with renewed growth of the small lava dome within the summit crater. The possibility of sudden explosions has increased. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level.  These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nmewest@alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increase in summit temperatures indicates renewed unrest.","sentUtc":"2015-06-17","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2015-06-17T20:21:52-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-06-17T20:21:52-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-06-17T20:21:52-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20150528\/2152Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA decline in seismicity over the last few months and no sign of activity in daily satellite images prompts AVO to downgrade Semisopochnoi volcano from Aviation Color Code YELLOW and Volcanic Alert Level ADVISORY to UNASSIGNED.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFollowing a brief seismic swarm in June and July, 2014, an increase in seismicity at Semisopochnoi seismic stations was recorded in January 2015.  Numerous small earthquakes, most with magnitudes less than 1 over the next several months led AVO to include Semisopochnoi in the March 20, 2015 Weekly Update.  On March 25, 2015, citing increased earthquake activity including brief periods of tremor, AVO raised the Aviation Color Code and Volcano Alert Level to YELLOW\/ADVISORY.  Over the next two months seismic levels have declined and no activity has been observed in daily satellite images or other remote sensing data.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to monitor Semisopochnoi seismic data and evaluate daily satellite images.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decline in seismicity and no activity detected in satellite data prompt downgrade of status to UNASSGIGNED.","sentUtc":"2015-05-28","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2015-05-28T21:52:17-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-05-28T21:52:17-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-05-28T21:52:17-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20150325\/1731Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity at Semisopochnoi that began in January continues, and has increased in intensity over the past few days. In addition, we have detected brief periods of seismic tremor, which can indicate movement of magma or magmatic gases. Thus we are increasing the aviation color code to YELLOW and the volcano alert level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has not observed any other signs of volcanic activity in remote sensing or other data.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERemote Semisopochnoi volcano occupies the largest young volcanic island in the western Aleutians. The volcano is dominated by a 7-km (5-mile) diameter caldera that contains a small lake and a number of post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The last known eruption of Semisopochnoi occurred in 1987, probably from Sugarloaf Peak on the south coast of the island, but details are lacking.  Another prominent, young post-caldera landform is Mount Cerberus, a three-peaked cone cluster in the southwest part of the caldera. The island is uninhabited and part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Semisopochnoi is experiencing higher than normal levels of seismic activity.  No other signs of volcanic activity have been observed.","sentUtc":"2015-03-25","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2015-03-25T17:31:17-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-03-25T17:31:17-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-03-25T17:31:17-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20150115\/2113Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2015\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EPavlof Volcano has returned to its background state following its most recent eruption. Since late November, 2014, no lava or ash emissions have occurred at Pavlof Volcano and the volcano has exhibited gradually declining levels of unrest. Seismicity is now at background levels. Consequently, AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRockfalls and small avalanches of debris may occur intermittently on the north-northwest flank of the volcano. Drainages leading away from the north flank of Pavlof are susceptible to small lahars and minor floods as long as hot material remains high on the slopes of the volcano where it could mix with ice and snow.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavlof has, in past eruptions, resumed activity after pauses as long as 55 days, and AVO continues to monitor the volcano closely for signs of renewed activity. We expect hours to days of increased seismicity prior to a resumption of eruptive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcanic activity at background levels.","sentUtc":"2015-01-15","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2015-01-15T21:13:49-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2015-01-15T21:13:49-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2015-01-15T21:13:49-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20141126\/0027Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A19\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe most recent period of explosive eruptive activity at Pavlof Volcano has ended. For about the past week, seismicity at the volcano has remained at low levels and shows no indication of the unrest typically associated with lava fountaining or ash emission. Satellite observations show no evidence for continuing eruptive activity. Thermal signals at the summit are occasionally visible, but are likely being generated by the cooling of previously emplaced lava and debris and not newly erupted material. The low levels of seismic activity and the lack of evidence for continued lava effusion indicate that the brief eruption has ended and thus AVO is lowering the Aviation color code and Volcano Alert Level to YELLOW\/ADVISORY.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPauses in vigorous eruptive activity of days to weeks are common during eruptive episodes of Pavlof Volcano. A return to more robust eruptive activity remains possible and could occur with little or no warning. Thus, AVO will continue to monitor the volcano closely and will issue additional information as necessary. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity at low levels. Eruption has ended. ","sentUtc":"2014-11-26","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-11-26T00:27:30-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-11-26T00:27:30-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-11-26T00:27:30-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20141124\/1049Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A18\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity has increased over the past two hours and more sharply over the past 30 minutes, suggesting that the eruption at Shishaldin has intensified. Ash emissions beyond the immediate summit crater are more likely while seismic activity is increased. Satellite images from earlier tonight show elevated surface temperatures near the volcano's summit. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity has increased sharply over the past hour. Eruption has intensified.","sentUtc":"2014-11-24","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2014-11-24T10:49:42-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-11-24T10:49:42-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-11-24T10:49:42-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20141116\/1713Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A17\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe intensity of the eruption of Pavlof Volcano has greatly diminished, and the Aviation Color Code is being decreased  to ORANGE and the Volcano Alert Level to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSeismic tremor abruptly decreased around 7 pm AKST yesterday (04:00 UTC on 16 November) and has remained at very low levels since. Satellite observations  confirmed a large decrease in ash emissions, and at present show no evidence of an ash plume at the volcano. Discrete seismic events continue to be observed at Pavlof, and minor ash emissions may be occurring that are not detected in satellite.  Pilot and\/or ground observer reports may provide additional information once the sun comes up. Pauses of days to weeks are common during eruptive episodes at Pavlof and increased activity could occur with little warning.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAviation users should refer to the National Weather Service for updated SIGMETs on the ash cloud hazard (http:\/\/www.weather.gov\/aawu\/sigmets). No reports of ash fallout on nearby communities have been received and we encourage observers to contact AVO should it occur (https:\/\/www.avo.alaska.edu\/ashfall\/ashreport.php). \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone detected at the volcano at present. Minor ash emissions may occur but will likely be lower than 12,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESee SIGMETs for information on dispersed cloud from the period of heightened activity.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Paskievitch, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpaskie@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Intensity of eruption has greatly diminished. Seismicity at low levels.","sentUtc":"2014-11-16","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-11-16T17:13:48-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-11-16T17:13:48-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-11-16T17:13:48-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20141115\/2030Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A16\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Pavlof Volcano that began on November 12  has intensified and the ash cloud height is currently estimated at 25,000 ft above sea level. Thus, the Aviation Color Code has been raised to RED and the Volcano Alert Level to WARNING. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe intensity of seismic tremor has increased significantly over the past 6 hours, and satellite data indicate that the ash cloud is now at an altitude of 25,000 ft above sea level. As of 11:00 am AKST (20:00 UTC) the cloud is moving towards the northwest and extends for about 125 miles (200 km) downwind.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAviation users should refer to the National Weather Service for updated SIGMETs on the ash cloud hazard (http:\/\/www.weather.gov\/aawu\/sigmets). No reports of ash fallout on nearby communities have been reported, and we encourage observers to contact AVO should it occur (https:\/\/www.avo.alaska.edu\/ashfall\/ashreport.php).\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E25,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMoving towards the NW. \r\nSee http:\/\/www.weather.gov\/aawu\/sigmets for latest updated SIGMET.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption has intensified. Ash cloud height now estimated at 25,000 ft above sea level. ","sentUtc":"2014-11-15","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-11-15T20:30:28-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-11-15T20:30:28-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-11-15T20:30:28-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20141113\/0357Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A15\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EPavlof Volcano has entered a new phase of eruptive activity. The Aviation Color Code has been increased to Orange and the Volcano Alert Level to Watch. A ground observer in Cold Bay located 60 km (37 miles) from the volcano has reported ash emissions up to 9000 ft above sea level (about 700 ft above the summit). Minor ash emissions were visible in the FAA-operated web camera in Cold Bay beginning around 1:50 UTC on 13 November (4:50 pm AKST on 12 November). Seismic tremor has increased over the past several hours and remains elevated. Satellite observation of the volcano are currently obscured by a low cloud deck.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAsh height reported up to 9000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMinor ash emissions observed in web camera images.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Low-level ash emissions began around 02:00 UTC","sentUtc":"2014-11-13","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-11-13T03:57:54-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-11-13T03:57:54-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-11-13T03:57:54-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20141028\/2305Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A14\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe ongoing low-level eruptive activity at Shishaldin Volcano has increased in intensity over the past several days.  Elevated surface temperatures were observed in satellite images beginning on October 25, and early that evening seismic tremor began to be recorded on nearby seismic stations, accompanied by stronger thermal anomalies.  New deposits of ash and ballistics darkened the summit area, indicating the activity was energetic enough to eject material from a depth of several hundred meters (~600 ft) within the summit crater. The activity was recorded on infrasound arrays located in Akutan, 90 mi (145 km) to the southwest, and Dillingham, 363 mi (585 km) to the northeast.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNo ash plumes have been reported or observed in satellite data; however, a steam and gas plume was visible in satellite imagery on Saturday, October 25.  As of today, tremor continues and has increased in the past 24 hours.     \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Uptick in low-level eruptive activity","sentUtc":"2014-10-28","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2014-10-28T23:05:46-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-10-28T23:05:46-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-10-28T23:05:46-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140904\/1858Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe rate and intensity of earthquake activity at Semisopochnoi has been decreasing over the past two months and there are no indications from satellite observations of any changes on the surface of the volcano. Thus, the Aviation Color Code and Volcano Alert Level have been decreased to Unassigned. Although we are confident that earthquake activity has decreased significantly, the seismic data from Semisopochnoi has suffered from frequent data outages. We are unable to assign the Green\/Normal alert levels until the data transmission proves to be more reliable. We will continue to monitor Semisopochnoi with seismic data when available, and with satellite data.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERemote Semisopochnoi volcano occupies the largest, young volcanic island in the western Aleutians. The volcano is dominated by an 8-km (5-mile) diameter caldera that contains a small lake and a number of post-caldera cones and craters. The age of the caldera is not known with certainty but is likely early Holocene. The last known eruption of Semisopochnoi occurred in 1987, probably from Sugarloaf Peak on the south coast of the island, but details are lacking.  Another prominent, young post-caldera landform is Mount Cerberus, a three-peaked cone cluster in the southwest part of the caldera. The island is uninhabited and part of the Alaska Maritime National Wildlife Refuge. It is located 65 km (40 mi) northeast of Amchitka Island and 200 km (130 mi) west of Adak. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No volcanic unrest detected.","sentUtc":"2014-09-04","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2014-09-04T18:58:02-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-09-04T18:58:02-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-09-04T18:58:02-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140730\/2239Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Pavlof Volcano has ended, and the volcano has returned to its background state. Lava fountaining was last observed at Pavlof in mid-June, and the volcano has exhibited gradually declining levels of unrest since that time. Seismic data are now at background levels. Consequently, AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRockfalls and small avalanches of debris may occur intermittently on the north-northwest flank of the volcano. Drainages leading away from the north flank of Pavlof are susceptible to small lahars and minor floods as long as hot material remains high on the slopes of the volcano where it could mix with ice and snow.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavlof has, in past eruptions, resumed activity after pauses as long as 55 days, and AVO continues to monitor the volcano closely for signs of renewed activity. We expect hours to days of increased seismicity prior to a resumption of eruptive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMatt Haney, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmhaney@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcanic activity at background levels. ","sentUtc":"2014-07-30","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-07-30T22:39:58-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-07-30T22:39:58-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-07-30T22:39:58-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140709\/2357Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity, indicative of unrest, at Veniaminof has decreased to near background levels during the past week. Clear eruptive activity has not been observed since October of 2013. Thus AVO is lowering the Aviation Color Code to Green and the Volcano Alert Level to Normal. Occasional steam plumes and weakly elevated surface temperatures may continue to be seen in satellite and webcam imagery as lava flows cool. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible that this is only a temporary pause of activity in the eruption that began in June 2013, and that the eruption could resume. Pauses in eruptive activity are not uncommon at this volcano. AVO will continue to monitor the volcano closely.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~ 300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were Strombolian eruptions producing lava fountans and minor emissions of ash and gas from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded into the ice field producing a melt pit. Minor ash-producing explosions occurred nearly annually between 2002 and 2008. Previous historical eruptions have produced ash plumes that reached 20,000 ft above sea level (1939 and 1956) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939).\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code\/Volcano Alert Level lowered to Green\/Normal.  Seismicity near background.  ","sentUtc":"2014-07-09","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2014-07-09T23:57:07-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-07-09T23:57:07-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-07-09T23:57:07-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140625\/1835Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEruptive activity at Pavlof Volcano appears to have ceased. Clear web camera and satellite images over the past several days have shown no evidence of continued lava fountaining from the summit.  Only weakly elevated surface temperatures in the vicinity of recent lava flows northeast of the summit have been recorded. AVO has observed no evidence of ash emission from the volcano since early June. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nConsequently, the Aviation Color Code is being reduced to Yellow and the Volcano Alert Level to Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDespite this apparent quiet, small discrete seismic events continue. These signals may be related to several processes including (1) degassing of unerupted magma within the volcano\u00e2\u20ac\u2122s conduit and (2) periodic collapse of ejecta and other debris down the steep flanks of the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavlof remains restless and an intermittent plume of steam and gas from the summit is to be expected. Renewed eruptive activity is possible and may not be preceded by significant seismicity. AVO will continue to monitor Pavlof closely.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENil\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENil\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit.  With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated.  The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No sign of continued eruptive activity. ","sentUtc":"2014-06-25","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-06-25T18:35:06-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-06-25T18:35:06-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-06-25T18:35:06-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140613\/2016Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ESemisopochnoi  (VNUM #311060)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A9\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min E 179 deg 35 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2625 ft (800 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA swarm of earthquakes at Semisopochnoi volcano that started at 10:00 AKDT (18:00 UTC) on June 9 escalated yesterday, June 12, at approximately 12:00 AKDT (20:00 UTC). The continuation of this anomalous seismic activity through the night prompts AVO to raise the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. No eruptive activity is currently indicated.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is closely monitoring the situation and will issue further updates as conditions change.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSemisopochnoi volcano is monitored by a 6-station seismic network as well as satellite imagery. Five of the seismic stations on Semisopochnoi are currently operational. The telemetry system for the Semisopochnoi stations, located on Amchitka Island, was just repaired in late May. Semisopochnoi Island is located 65 km (40 mi) northeast of Amchitka and 200 km (130 mi) west of Adak in the remote western Aleutian Islands. The last eruption of Semisopochnoi occurred in 1987.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Semisopochnoi volcano raised to Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY based on seismicity.","sentUtc":"2014-06-13","obs":"avo","vName":"Semisopochnoi","vnum":"311060","noticeId":"DOI-USGS-AVO-2014-06-13T20:16:28-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-06-13T20:16:28-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-06-13T20:16:28-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140604\/0154Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is reducing the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH for Pavlof Volcano.  Although the eruption of Pavlof continues, seismic tremor has deceased over the past 12 hours and has remained relatively steady throughout the day at a much lower level than that of yesterday.  Recent satellite data and web camera views of the eruption plume indicate that there are now two distinct parts of the plume.  The part of the plume that reaches high above the volcano appears to be mainly steam and gas with minor ash present, extending south of the volcano.  Additionally, pyroclastic flow activity on the north flank is producing diffuse ash emissions that result in areas of hazy air, with variable concentrations of ash below 10,000 ft.  Low-level winds are likely to disperse this ash to the west-southwest with no more than trace amounts accumulating. There are no reports of ash falling in nearby communities. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHazardous conditions exist on the north flank and north side drainages heading on the volcano due to continued pyroclastic and lahar activity.  Ash in the vicinity of the volcano remains a hazard to local air traffic.  AVO will continue to closely monitor the activity at Pavlof.  With the eruption ongoing, conditions can change rapidly, and the possibility remains for large, more ash-rish plumes to develop with little or no warning. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The eruption of Pavlof continues.  Seismic tremor has decreased. Ash production reduced.","sentUtc":"2014-06-04","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-06-04T01:54:13-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-06-04T01:54:13-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-06-04T01:54:13-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140603\/0130Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERESENDING:  The low-level eruption of Pavlof has escalated. Seismic tremor increased starting about 2300 UTC today and pilots have recently reported ash clouds to 22,000 ft. ASL.  Recent satellite images show a plume extending over 80 km east of the volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The low-level eruption of Pavlof has escalated.  Seismic tremor increased about 2300 UTC today and pilots report ash clouds to 22,000 ft. ASL.","sentUtc":"2014-06-03","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-06-03T01:30:38-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-06-03T01:30:38-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-06-03T01:30:38-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140603\/0121Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe low-level eruption of Pavlof has escalated. Seismic tremor increased starting about 2300 UTC today and pilots have recently reported ash clouds to 22,000 ft. ASL.  Recent satellite images show a plume extending over 80 km east of the volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The low-level eruption of Pavlof has escalated.  Seismic tremor increased about 2300 UTC today and pilots report ash clouds to 22,000 ft. ASL.","sentUtc":"2014-06-03","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-06-03T01:21:45-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-06-03T01:21:45-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-06-03T01:21:45-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140531\/1936Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated surface temperatures were detected at the summit of Pavlof volcano in satellite imagery this morning suggesting that the volcano is experiencing a low-level eruption with lava at the surface.  A low level steam plume is visible in satellite imagery and in the FAA web camera located in Cold Bay.  A pilot reported a gas and ash plume drifting north at 7,000 to 8,000 feet above sea level.  Based on these observations AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH for Pavlof volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Strong elevated surface temperatures, pilot reports and web camera images suggest that Pavlof is experiencing a low-level eruption.","sentUtc":"2014-05-31","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2014-05-31T19:36:51-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-05-31T19:36:51-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-05-31T19:36:51-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140328\/2219Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is raising the Aviation Color Code to ORANGE and Alert Level to WATCH at Shishaldin Volcano.  Elevated surface temperatures were detected in satellite data beginning on March 18 and have persisted to the present time.  Analysis of this data shows that temperatures are consistent with the eruption of lava within the summit crater.  The current activity appears to be confined to the deep summit crater and there have been no observations of lava on the flanks of the volcano or surrounding the summit crater. Web camera images, satellite data and pilot observations over the past week show only minor steam emissions from the mountain's summit crater.  There has been no evidence of ash emission.     \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSound waves coupling into the ground (ground-coupled air waves) indicative of small explosions in the crater began to be seen in seismic data on March 18 and continue to be detected intermittently.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A small summit crater typically emits a noticeable steam plume with occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including at least 24 confirmed eruptions since 1775. Most of Shishaldin's eruptions have consisted of small ash and steam plumes, although a recent eruption in April-May 1999 produced an ash column that reached a height of 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymeuller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Elevated surface temperatures are detected in satellite images consistent with lava effusion. Low level activity detected in seismic data.","sentUtc":"2014-03-28","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2014-03-28T22:19:36-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-03-28T22:19:36-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-03-28T22:19:36-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140130\/2039Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY at Shishaldin Volcano based on satellite observations over the past day of increased surface temperatures in the summit crater, as well as increased emissions of steam observed yesterday in satellite and web camera images. These observations represent a departure from normal background activity at Shishaldin, but do not necessarily indicate that an eruption will occur. Similar levels of unrest were last noted during 2009, and did not result in an eruption. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShishaldin is monitored by a local seismic network, satellite data, web camera, telemetered geodetic network, and distant infrasound networks. Seismic monitoring of Shishaldin is significantly impaired due to equipment failures of seismic stations close to the volcano. We hope to be able to detect significant explosive activity (should it occur) using remaining functioning seismic stations in the region, satellite, and distant infrasound networks. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to watch Shishaldin carefully for additional signs of increased unrest.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A small summit crater typically emits a noticeable steam plume with occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, erupting atleast 28 times since 1775.  Most of Shishaldin's eruptions have consisted of small ash and steam plumes, although the most recent eruption in April-May 1999 produced an ash column that reached a height of 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased unrest at Shishaldin Volcano, with elevated surface temperatures and steaming observed.","sentUtc":"2014-01-30","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2014-01-30T20:39:11-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-01-30T20:39:11-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-01-30T20:39:11-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140110\/2231Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo activity has been observed at Cleveland since the three brief explosions on December 28 and 30 and January 2. Satellite views since January 2 suggest that no new lava has effused at the summit crater. Thus we are lowering the Level of Concern Color Code to YELLOW and the Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt remains possible for brief, sudden explosions of blocks and ash from the summit vent to occur with little to no warning. These explosions may produce drifting ash clouds and local fallout of ash over the surrounding ocean, on the flanks of Cleveland Volcano, and on parts of Chuginadak Island. It is possible that more energetic explosions will occur that may produce more significant ash clouds.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIf a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours or more is possible. Cleveland volcano does not have a local seismic network and is monitored using only distant seismic and infrasound instruments and satellite data.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Brief explosion on Jan. 2 UTC. Ash cloud observed north of volcano. Nothing observed since then.","sentUtc":"2014-01-10","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2014-01-10T22:31:15-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-01-10T22:31:15-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-01-10T22:31:15-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20140102\/2019Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2014\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECleveland Volcano appears to have entered a renewed phase of elevated unrest and AVO is moving the Aviation Color Code and Alert Level from Yellow\/Advisory to ORANGE\/WATCH. Three brief explosions were detected over the past six days on Saturday Dec. 28, Monday, Dec. 30, and at 04:00 UTC, Jan. 2, 2014 (1900 AKST Jan. 1). Minor ash plumes were observed in satellite data following the events on Dec. 30 and Jan. 2. The plumes were only visible in single satellite images where they appeared as distinct ash plumes, detached from the summit, extending 45 to 60 miles (75 to 100 km) north of the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe height of the ash plumes generated on Dec. 30 and Jan. 2 is not known. Analysis of satellite, wind, and ash dispersion data indicates that these particular plumes probably did not reach more than 15,000 feet above sea level. Past explosive activity at Cleveland Volcano has produced ash clouds that have risen above 20,000 feet and if explosive activity continues, it remains possible for ash clouds to reach this height or higher.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible for brief, sudden explosions of blocks and ash from the summit vent of Cleveland Volcano to occur with little to no warning. These explosions may produce drifting ash clouds and local fallout of ash over the surrounding ocean, on the flanks of Cleveland Volcano, and on parts of Chuginadak Island. It is possible that more energetic explosions will occur that may produce more significant ash clouds.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIf a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours or more is possible. Cleveland volcano does not have a local seismic network and is monitored using only distant seismic and infrasound instruments and satellite data.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. The last minor ash emission following an explosion was on May 5, 2013.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Brief explosion on December 30. No ash cloud observed.","sentUtc":"2014-01-02","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2014-01-02T20:19:44-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2014-01-02T20:19:44-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2014-01-02T20:19:44-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20131231\/0722Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A21\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EBrief explosion from Cleveland Volcano detected at 4:06 UTC Dec. 31 (19:06 AKST, Dec. 30). No satellite images available after the time of the explosion, so uncertain if minor ash cloud generated, but unlikely. This explosion was similar to the explosion detected at 21:29 UTC December 28 (12:29 AKST). \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSimilar such explosions may continue without warning, and may produce minor ash clouds that are not expected to extend much beyond the volcano, but could produce local fallout on the flanks of the volcano. AVO has received no reports of activity from local observers.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 474-5269\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Brief explosion on December 30. No ash cloud observed.","sentUtc":"2013-12-31","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2013-12-31T07:22:48-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-12-31T07:22:48-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-12-31T07:22:48-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20131017\/2318Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A20\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Mount Veniaminof has paused. Seismic activity has decreased over the past week and satellite observations during periods of clear weather show no evidence of eruptive activity. AVO is lowering the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible that this is only a temporary pause of activity in the eruption that began in June 2013, and that more vigorous activity could resume. Pauses in eruptive activity such as this are not uncommon at this volcano. AVO will continue to monitor the volcano closely.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~ 300 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing  intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone.  During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, November 2006, and February 2008. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist, ADGGS\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 451-5005\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption has paused. Unrest continues.","sentUtc":"2013-10-17","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2013-10-17T23:18:50-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-10-17T23:18:50-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-10-17T23:18:50-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20131006\/1841Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A19\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Veniaminof resumed this morning. The Aviation Color Code has been increased to Orange and the Volcano Alert Level to Watch. Seismic tremor increased oner the past several hours, and highly elevated surface temperature were observed in satellite images this morning. Lava effusion has likely resumed, but no ash emissions have been observed in satellite images. Web camera images are obscured by clouds. This is a similar level of eruptive activity that first began in June 2013.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo ash emissions observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~ 300 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing  intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone.  During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, November 2006, and February 2008. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption resumes. Lava effusion, no ash detected","sentUtc":"2013-10-06","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2013-10-06T18:41:27-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-10-06T18:41:27-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-10-06T18:41:27-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130920\/2013Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A18\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EBased on a decline in seismic activity and the lack of evidence of eruptive activity observed in satellite and web camera imagery over the past week, AVO is lowering the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible that this is only a temporary waning of activity in the eruption that began in June 2013, and that more vigorous activity could resume.  Pauses in eruptive activity such as this are not uncommon at this volcano.  AVO will continue to monitor the volcano closely.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~ 300 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing  intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone.  During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, November 2006, and February 2008. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"AVO changed the color code to yellow based on absence of eruptive activity over the past week.","sentUtc":"2013-09-20","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2013-09-20T20:13:44-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-09-20T20:13:44-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-09-20T20:13:44-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130830\/1759Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A17\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EIntense seismicity, lava fountaining, and ash emissions to 15,000 to 20,000 feet above sea level have been occurring at Veniaminof Volcano over the past several hours. The ongoing episode of activity is some of the strongest unrest detected so far during the eruption at the intracaldera cone of the volcano that began in early June. Although the activity at present is primarily lava fountaining and moderate ash emission, it is possible that conditions may continue to escalate, and higher rising, more ash rich plumes may be generated. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe ash plume associated with the current level of unrest is moving in a generally southerly direction and may result in trace amounts of ash fall on areas downwind of the volcano including Perryville and possibly the Chignik area. Ash fall amounts are not expected to be significant and likely will be less than 1\/16 inch, although areas within 1-2 miles of the eruption site could receive thicker amounts of ash fall. More information about volcanic ash and the effects of ash fall can be found on the AVO web page (www.avo.alaska.edu), or by calling AVO at 907-786-7497.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the volcano closely and may issue additional information about the status of activity as needed throughout the day.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Intense seismic tremor, elevated surface temperatures, ash emission.","sentUtc":"2013-08-30","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2013-08-30T17:59:54-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-08-30T17:59:54-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-08-30T17:59:54-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130808\/2044Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A16\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESince June 26 2013, no lava or ash emissions have occurred at Pavlof Volcano and the volcano has exhibited gradually declining levels of unrest. Seismicity is now at background levels, and satellite images and web camera views of the volcano show no evidence of continuing lava or ash emission. Consequently, AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRockfalls and small avalanches of debris may occur intermittently on the north-northwest flank of the volcano. Drainages leading away from the north flank of Pavlof are susceptible to small lahars and minor floods as long as hot material remains high on the slopes of the volcano where it could mix with ice and snow.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavlof has, in past eruptions, resumed activity after pauses as long as 55 days, and AVO continues to monitor the volcano closely for signs of renewed activity. We expect hours to days of increased seismicity prior to a resumption of eruptive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof volcano is located on the southwestern end of the Alaska Peninsula. Pavlof is a stratovolcano which rises to an elevation of 8262 feet. With almost 40 historic eruptions, it is one of the most consistently active volcanos in the Aleutian arc. Eruptive activity is generally characterized by sporadic strombolian fountaining continuing for a several-month period. The community of Cold Bay is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Based on lack of eruptive activity since June 26, Pavlof lowered to Aviation Color Code GREEN and Volcano Alert Level NORMAL.","sentUtc":"2013-08-08","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2013-08-08T20:44:16-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-08-08T20:44:16-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-08-08T20:44:16-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130703\/0011Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A15\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past two days, the eruptive activity at Pavlof has greatly declined. Seismic tremor and small discrete explosions are no longer detected in seismic and pressure sensor data. Satellite observations show no evidence of elevated surface temperatures, volcanic gas, or ash emissions. There have been no visual observations from pilots or from webcam images of any eruptive activity since June 26. Consequently, the Aviation Color Code is being reduced to Yellow and the Volcano Alert Level to Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDuring earlier periods of the current eruption and past eruptions of Pavlof, the style of eruptive activity has fluctuated from higher to lower levels. Such a fluctuation occurred during the current eruption on May 28, when eruptive activity paused until resuming on June 4. Therefore, the current pause in eruptive activity does not necessarily indicate that the eruption has ended. Renewed activity is possible, and may not be preceded by significant seismic activity. AVO will continue to monitor Pavlof closely.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof volcano is located on the southwestern end of the Alaska Peninsula. Pavlof is a stratovolcano which rises to an elevation of 8262 feet. With almost 40 historic eruptions, it is one of the most consistently active volcanos in the Aleutian arc. Eruptive activity is generally characterized by sporadic strombolian fountaining continuing for a several-month period. The community of Cold Bay is located 60 km (37 miles) to the southwest of Pavlof. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJanet Schaefer, Acting Coordinating Scientist,\u003Cbr \/\u003E\r\nAlaska Division of Geological and Geophysical Surveys\u003Cbr \/\u003E\r\njanet.schaefer@alaska.gov (907) 451-5005\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Based on absence of eruptive activity at Pavlof, Aviation Color Code reduced to Yellow and Volcano Alert Level to Advisory.","sentUtc":"2013-07-03","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2013-07-03T00:11:29-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-07-03T00:11:29-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-07-03T00:11:29-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130613\/1749Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A14\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EElevated surface temperatures observed in satellite images of Veniaminof Volcano this morning at 13:25 UTC (05:25 AKDT) indicate an eruption at the intracaldera cone is likely underway. AVO is thus raising the Aviation Color Code and Volcano Alert Level to ORANGE\/WATCH. Seismic tremor continues and is indicative of low-level effusive activity and small explosions. No ash plumes have been observed this morning although clouds have obscured web camera views of the summit.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has been monitoring Veniaminof closely since elevated levels of seismicity became persistent on June 8. Steam plumes issuing from the intracaldera cone have been observed in web camera views since then, but so far no ash emissions have been confirmed.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRecent eruptions of Veniaminof Volcano have all occurred from vents located on the intracaldera cone and were characterized by brief bursts of ash emission and small explosions. Ash plumes associated with this type of activity are typically diffuse and generally do not reach more than 20,000 feet above sea level. Ash fallout is typically limited to the flanks of the volcano. Minor emissions of steam and ash may persist for for weeks to months. The last episode of more energetic activity occurred in 1993-94 when an ash plume rose to about 18,000 feet above sea level and small lava flows poured onto glacier ice around the intracaldera cone. An eruption in 1983-84 produced an ash plume that reached about 25,000 feet above sea level.   \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njflarsen@alaska.edu (907) 474-7992\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Elevated surface temperatures indicate an eruption is likely underway.","sentUtc":"2013-06-13","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2013-06-13T17:49:50-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-06-13T17:49:50-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-06-13T17:49:50-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130608\/1812Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past two days, AVO has detected gradually increasing seismic tremor beneath Veniaminof. We are therefore increasing the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nClear web-camera and satellite views currently show nothing unusual at the volcano. Similar seismic activity has been associated with ash emissions at Veniaminof in the past, most recently in 2005. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enil\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Enil\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~ 300 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing  intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone.  During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, and early November 2006. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic tremor detected beneath Veniaminof.","sentUtc":"2013-06-08","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2013-06-08T18:12:35-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-06-08T18:12:35-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-06-08T18:12:35-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130604\/2311Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThere have been no explosions detected from Cleveland volcano since May 6, and there is no evidence for lava effusion since May 13. Weakly elevated surface temperatures detected in clear-weather satellite views are consistent with cooling of a newly emplaced lava flow. We are therefore lowering the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSudden explosions of blocks and ash are still possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours is possible. Cleveland volcano does not have a local seismic network and is monitored using only distant seismic and infrasound instruments and satellite data.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 474-5269\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Activity at Cleveland has declined since the last explosion on May 6 and the end of lava effusion around May 13.","sentUtc":"2013-06-04","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2013-06-04T23:11:34-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-06-04T23:11:34-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-06-04T23:11:34-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130604\/2015Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAsh emissions have resumed at Pavlof starting at approximately 11:00 AKDT (19:00 UTC) this morning as seen in satellite data and observed by pilots. Weak seismicity beginning at 10:57 AKDT accompanied the emissions and is ongoing. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite images show ash moving southeast, and pilot reports estimate cloud height at 19,000 ft asl. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E19,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Emoving southeast\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 474-5269\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ash emissions have resumed at Pavlof volcano.","sentUtc":"2013-06-04","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2013-06-04T20:15:28-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-06-04T20:15:28-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-06-04T20:15:28-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130528\/2050Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past three days, the eruptive activity at Pavlof have greatly declined. Seismic tremor and small discrete explosions are no longer detected in seismic and pressure sensor data. Satellite observations show no evidence of elevated surface temperatures, volcanic gas or ash emissions. There have been no visual observations from pilots or web cameras of any eruptive activity. Consequently, the Aviation Color Code is being reduced to Yellow and the Volcano Alert Level to Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDuring past eruptions of Pavlof, the style of eruptive activity fluctuated from higher to lower levels. Therefore, this pause in eruptive activity does not necessarily indicate that the eruption has ended. Renewed activity is possible, and may not be preceded by significant seismic activity. AVO will continue to monitor Pavlof closely.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChristopher Waythmas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPavel Izbekov, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\npavel@gi.alaska.edu (907) 474-5269\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruptive activity has stopped. Decrease in Aviation Color Code and Volcano Alert Level ","sentUtc":"2013-05-28","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2013-05-28T20:50:37-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-05-28T20:50:37-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-05-28T20:50:37-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130513\/1938Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof  (VNUM #312030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A9\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 55 deg 25 min W 161 deg 53 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8261 ft (2518 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Pavlof Volcano increased this morning commensurate with the presence of an intense thermal anomaly at the summit observed in latest satellite imagery.  Similar patterns of seismicity and elevated surface temperatures have previously signaled the onset of eruptive activity at Pavlof.  Although not yet visually confirmed, a low-level eruption of lava has likely begun from a summit vent.  No ash clouds have been detected.    \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPavlof volcano is located on the southwestern end of the Alaska Peninsula. Pavlof is a stratovolcano which rises to an elevation of 8262 feet. With almost 40 historic eruptions, it is one of the most consistently active volcanos in the Aleutian arc. Eruptive activity is generally characterized by sporadic strombolian fountaining continuing for a several-month period. The community of Cold Bay is located 60 km (37 miles) to the southwest of Pavlof.  The last eruption occurred in August 2007. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Abrupt increase in seismic activity.  Thermal anomaly. Likely onset of lava eruption.","sentUtc":"2013-05-13","obs":"avo","vName":"Pavlof","vnum":"312030","noticeId":"DOI-USGS-AVO-2013-05-13T19:38:18-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-05-13T19:38:18-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-05-13T19:38:18-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130504\/1413Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO infrasound detected a possible explosion at Cleveland Volcano this morning at 5:00AM AKDT )13:00 UTC). The infrasound signals suggest that this was a relatively short duration, low-level explosion.  No eruption cloud has been detected in available satellite views.  AVO received no other reports of activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Elow altitude\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in November 2012.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Possible explosion detected by infrasound at 13:00UTC","sentUtc":"2013-05-04","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2013-05-04T14:13:56-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-05-04T14:13:56-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-05-04T14:13:56-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130329\/2015Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELittle Sitkin  (VNUM #311050)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 32 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3898 ft (1188 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO can no longer seismically monitor the following volcanoes because of seismic station outages. As a result, AVO is unable to (1) assess whether these volcanoes may be building towards an eruption and (2) quickly confirm or dismiss reports of activity at these volcanoes.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nUgashik-Peulik\u003Cbr \/\u003E\r\nUkinrek Maars\u003Cbr \/\u003E\r\nLittle Sitkin\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBecause these volcanoes are no longer seismically monitored, they will move from volcano alert level Normal and aviation color code Green to \u0022unassigned.\u0022 As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, infrasound, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nJohn Power Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Little Sitkin moved from volcano alert level Normal and aviation color code Green to \u0022unassigned\u0022 because of seismic station outages.","sentUtc":"2013-03-29","obs":"avo","vName":"Little Sitkin","vnum":"311050","noticeId":"DOI-USGS-AVO-2013-03-29T20:15:53-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-03-29T20:15:53-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-03-29T20:15:53-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130329\/2013Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUkinrek Maars  (VNUM #312131)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 57 deg 50 min W 156 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E299 ft (91 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO can no longer seismically monitor the following volcanoes because of seismic station outages. As a result, AVO is unable to (1) assess whether these volcanoes may be building towards an eruption and (2) quickly confirm or dismiss reports of activity at these volcanoes.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nUgashik-Peulik\u003Cbr \/\u003E\r\nUkinrek Maars\u003Cbr \/\u003E\r\nLittle Sitkin\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBecause these volcanoes are no longer seismically monitored, they will move from volcano alert level Normal and aviation color code Green to \u0022unassigned.\u0022 As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, infrasound, and reports from pilots and ground observers to detect signs of eruptive activity.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ukinrek Maars moved from volcano alert level Normal and aviation color code Green to \u0022unassigned\u0022 because of seismic station outages.","sentUtc":"2013-03-29","obs":"avo","vName":"Ukinrek Maars","vnum":"312131","noticeId":"DOI-USGS-AVO-2013-03-29T20:13:49-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-03-29T20:13:49-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-03-29T20:13:49-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130329\/2007Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUgashik-Peulik  (VNUM #312130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 57 deg 45 min W 156 deg 22 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4836 ft (1474 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO can no longer seismically monitor the following volcanoes because of seismic station outages. As a result, AVO is unable to (1) assess whether these volcanoes may be building towards an eruption and (2) quickly confirm or dismiss reports of activity at these volcanoes.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nUgashik-Peulik\u003Cbr \/\u003E\r\nUkinrek Maars\u003Cbr \/\u003E\r\nLittle Sitkin\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBecause these volcanoes are no longer seismically monitored, they will move from volcano alert level Normal and aviation color code Green to \u0022unassigned.\u0022 As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data, infrasound, and reports from pilots and ground observers to detect signs of eruptive activity. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Ugashik-Peulik moved from volcano alert level Normal and aviation color code Green to \u0022unassigned\u0022 because of seismic station outages.","sentUtc":"2013-03-29","obs":"avo","vName":"Ugashik-Peulik","vnum":"312130","noticeId":"DOI-USGS-AVO-2013-03-29T20:07:19-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-03-29T20:07:19-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-03-29T20:07:19-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130308\/1940Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe summit lava dome extruded in late January 2013 has remained unchanged since the last color code change on February 6, 2013.  Anomalous surface temperatures prevalent in late January through mid-February declined and the last thermal anomaly observed in satellite imagery was reported on February 26.  Although satellite viewing conditions at Cleveland are typically cloudy, clear views between March 1 and 5 indicate no change has occurred in the summit dome and thermal anomalies no longer are present.  Therefore, the Aviation Color Code and Volcano Alert Level for Cleveland is lowered to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe last confirmed explosion at Cleveland occurred in November, 2012. The presence of a lava dome in the summit crater means that explosions of blocks and ash could occur with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff. However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No recent thermal anomalies or changes in lava dome prompts lowering of Color Code\/Alert Level to YELLOW\/ADVISORY ","sentUtc":"2013-03-08","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2013-03-08T19:40:58-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-03-08T19:40:58-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-03-08T19:40:58-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130206\/2118Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data obtained on January 30 indicate that a lava dome has grown in the summit crater of Cleveland Volcano warranting a change in aviation color code and volcano alert level to ORANGE\/WATCH. As of January 30 the dome was about 100 m in diameter and may have begun forming as early as January 24 when elevated surface temperatures were observed in satellite images. The size and shape of the dome appears to be unchanged through February 2 according to the most recently available satellite data. AVO has received no reports of activity or ash emissions since elevated surface temperatures were first observed around the 24th of January.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe development of a lava dome in the summit crater indicates that sudden explosions of blocks and ash are possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in November 2012.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lava dome detected in satellite images of Cleveland. AVO has received no further reports of activity.","sentUtc":"2013-02-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2013-02-06T21:18:23-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-02-06T21:18:23-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-02-06T21:18:23-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130109\/2310Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELittle Sitkin  (VNUM #311050)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 32 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3898 ft (1188 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EVolcanic unrest at Little Sitkin Volcano has decreased over the past several months, and the Alaska Volcano Observatory now considers it to have reached typical background levels. Thus, the Aviation Color Code has been reduced to Green and the Volcano Alert Level had been reduced to Normal.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcanic unrest decreased to background levels.","sentUtc":"2013-01-09","obs":"avo","vName":"Little Sitkin","vnum":"311050","noticeId":"DOI-USGS-AVO-2013-01-09T23:10:23-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-01-09T23:10:23-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-01-09T23:10:23-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20130109\/2308Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EIliamna  (VNUM #313020)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2013\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 1 min W 153 deg 5 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10016 ft (3053 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EVolcanic unrest at Iliamna volcano has decreased over the past several months, and the Alaska Volcano Observatory now considers it to have reached typical background levels. Thus, the Aviation Color Code has been reduced to Green and the Volcano Alert Level had been reduced to Normal. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOccasional small earthquakes continue, but at a greatly reduced rate and magnitude relative to the peak of unrest in March 2012. Steam and sulfur gas emissions continue to be observed from sites near the summit during periods of favorable meteorological conditions, but are not unusual at Iliamna. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcanic unrest has returned to background levels.","sentUtc":"2013-01-09","obs":"avo","vName":"Iliamna","vnum":"313020","noticeId":"DOI-USGS-AVO-2013-01-09T23:08:39-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2013-01-09T23:08:39-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2013-01-09T23:08:39-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20121121\/1650Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further explosions have been detected at Cleveland since November 10, 2012. There is no evidence of renewed lava-dome growth since that time. Therefore, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFurther sudden explosions of blocks and ash remain possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly.  However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nCleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in December 2011.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation Color Code lowered to YELLOW and Volcano Alert Level changed to ADVISORY. No explosions or renewed lava-dome growth since November 10.","sentUtc":"2012-11-21","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-11-21T16:50:19-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-11-21T16:50:19-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-11-21T16:50:19-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20121111\/0440Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA small ash cloud from Cleveland Volcano was detected in satellite views beginning today, Nov. 10, at 11:47AM AST (20:47 UTC) drifting slowly toward the ENE from the summit.  The ash cloud was last observed about 60 miles south of Dutch Harbor at 18:43 AST, Nov. 10 (03:43 UTC Nov 11). AVO has received no other reports of activity at the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSudden explosions of blocks and ash remain possible with little or no warning.  The previous confirmed explosion occurred on August 20. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly.  However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E18,000 to 22,000ft based on Puff.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. Before this event, the most recent minor ash emissions were observed in August 2012.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 378-7556\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":" Small ash cloud at Cleveland volcano. ","sentUtc":"2012-11-11","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-11-11T04:40:22-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-11-11T04:40:22-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-11-11T04:40:22-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120905\/2014Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite views of Cleveland since the last explosion on 20 August show no evidence of further eruptive activity. The last confident satellite detection of fresh lava within the summit crater was in early May.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBased on the apparent hiatus in lava effusion and explosions, it is possible that the current episode of eruptive activity has paused.  Therefore, AVO is lowering the Aviation Color Code and Alert Level to Yellow\/Advisory. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDespite this downgrade, sudden explosions of blocks and ash remain possible with little or no warning. Associated ash clouds could exceed 20,000 feet above sea level. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIf a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly.  However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497 \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff.freymueller@gi.alaska.edu (907) 978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity reported since 20 August.  ","sentUtc":"2012-09-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-09-05T20:14:49-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-09-05T20:14:49-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-09-05T20:14:49-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120830\/1220Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ELittle Sitkin  (VNUM #311050)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 57 min E 178 deg 32 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3898 ft (1188 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAt approximately 19:15 AKDT (04:15 UTC) last night, a swarm of high-frequency earthquakes began at Little Sitkin Volcano.  The continuation of this anomalous seismic activity through the night prompts AVO to raise the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.  No eruptive activity is currently indicated.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is closely monitoring the situation and will issue further updates as conditions changes.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nLittle Sitkin is monitored by a 4-station seismic network as well as satellite imagery.  Little Sitkin Island is located 35 km (21 mi) northwest of Amchitka and 320 km (200 mi) west of Adak in the remote western Aleutian Islands.  The last eruption of Little Sitkin is questionable and may have been in the early 1900s. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJeff Freymueller, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njeff@giseis.alaska.edu (907) 474-7286\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Sudden onset and continuing seismicity prompt Color Code\/Volcano Alert Level YELLOW\/ADVISORY. ","sentUtc":"2012-08-30","obs":"avo","vName":"Little Sitkin","vnum":"311050","noticeId":"DOI-USGS-AVO-2012-08-30T12:20:46-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-08-30T12:20:46-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-08-30T12:20:46-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120619\/2306Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A9\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA pilot report, web camera image, and infrasound data indicate an ash producing explosion occurred at Cleveland Volcano today around 22:05 UTC (14:05 AKDT). The pilot report suggests the cloud height is 35,000 feet (10 km) above sea level. Infrasound data indicate the eruption is short in duration.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional sudden explosions of blocks and ash are still possible with little warning. It is possible for associated ash clouds to exceed 20,000 feet above sea level. If a large ash-producing event occurs, seismic, infrasound, or volcanic lightning networks should detect the event and alert AVO staff. There is no real-time seismic monitoring network on Mount Cleveland so AVO is unable to track activity in real time.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EEstimated at 35,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in December 2011.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small ash emission at Cleveland. Color code to orange.","sentUtc":"2012-06-19","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-06-19T23:06:14-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-06-19T23:06:14-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-06-19T23:06:14-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120530\/1911Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo explosions or renewed lava-dome growth have been detected at Cleveland since May 9, 2012. There are no indications of heightened activity in any other data streams.  Therefore, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional sudden explosions of blocks and ash are still possible with little warning. It is possible for associated ash clouds to exceed 20,000 feet above sea level. If a large ash-producing event occurs, seismic, infrasound, or volcanic lightning networks should detect the event and alert AVO staff. There is no real-time seismic monitoring network on Mount Cleveland so AVO is unable to track activity in real time.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nCleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No changes observed since May 9.  Decreased color code\/Alert level to YELLOW\/ADVISORY","sentUtc":"2012-05-30","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-05-30T19:11:29-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-05-30T19:11:29-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-05-30T19:11:29-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120328\/2316Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent satellite views show that a another lava dome has formed in the summit crater over the past week. AVO is raising the volcano color code to ORANGE and volcano alert level to WATCH to reflect this increase in activity. AVO has received no other reports of activity at the volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWhile the volcano remains active, additional sudden explosions of blocks and ash are likely. It is possible for associated ash clouds to exceed 20,000 feet above sea level. If a larger ash-producing event occurs, seismic, infrasound, or volcanic lightning networks should detect the event and alert AVO staff. There is no real-time seismic monitoring network on Mount Cleveland so AVO is unable to track activity in real time.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"New summit lava dome detected at Cleveland.","sentUtc":"2012-03-28","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-03-28T23:16:38-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-03-28T23:16:38-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-03-28T23:16:38-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120323\/1800Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo further explosions have been detected at Cleveland since March 13, and we have no evidence that lava-dome growth has renewed since then. Therefore, we are lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRecent explosions were detected by seismic and infrasound networks, but clouds prevented observation of the resulting plumes in satellite images. Absence of significant deposits on the volcano suggest that the explosions have been relatively ash-poor.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional sudden explosions of blocks and ash are still possible with little warning.  It is possible for associated ash clouds to exceed 20,000 feet above sea level.  If a larger ash-producing event occurs, seismic, infrasound, or volcanic lightning networks should detect the event and alert AVO staff.  There is no real-time seismic monitoring network on Mount Cleveland so AVO is unable to track activity in real time.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No further explosions have been detected at Cleveland.","sentUtc":"2012-03-23","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-03-23T18:00:41-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-03-23T18:00:41-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-03-23T18:00:41-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120309\/2202Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EIliamna  (VNUM #313020)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 1 min W 153 deg 5 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10016 ft (3053 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past three months the earthquake rate at Iliamna Volcano has steadily increased and now exceeds normal background levels.  Although it is not certain that this sustained increase in earthquake activity represents the movement of magma at depth, it is a significant change and AVO has increased the Alert Level to Advisory and the Aviation Color Code to Yellow.  The current activity does not mean an eruption is imminent or certain. A similarly energetic episode of seismic unrest from September 1996 to February 1997 was likely related to the intrusion of new magma at depth, but an eruption did not occur.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to observe Iliamna closely, will conduct additional investigations and report on them as warranted.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENone\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EIliamna Volcano is located on the western side of lower Cook Inlet in Lake Clark National Park and Preserve. The volcano has a summit altitude of 3053 m (10,016 feet) above sea level and the volcanic edifice supports an extensive cover of snow and glacier ice. An active fumarole field is present on the upper eastern face of the volcano and on calm days, vapor emissions are often visible. There have been no known historical eruptions of Iliamna Volcano, but volcanic deposits preserved on the flanks of the volcano indicate that there have been multiple episodes of explosive eruptive activity in the past 2500 years and the most recent explosive event occurred about 300 years ago. Occasional large ice and rock avalanches, and changes in glacial ice have been observed in the past at Iliamna, but are not directly related to volcanic activity. The volcano is located 210 km (130 miles) southwest of Anchorage and 100 km (60 miles) northwest of Homer.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nDavid Schneider, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ndjschneider@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity has increased above background","sentUtc":"2012-03-09","obs":"avo","vName":"Iliamna","vnum":"313020","noticeId":"DOI-USGS-AVO-2012-03-09T22:02:40-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-03-09T22:02:40-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-03-09T22:02:40-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120302\/2017Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKanaga  (VNUM #311110)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min W 177 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4288 ft (1307 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe level of unrest at Kanaga Volcano has declined to background levels and AVO is reducing the Aviation Color Code and Volcano Alert Level to Green\/Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA brief period of elevated seismicity and an associated minor ash emission were detected on February 18. A minor increase in seismicity also occurred on February 24, but had no confirmed associated ash emission. Since then the level of unrest has declined to background levels.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No unusual activity detected in past 24 hours.","sentUtc":"2012-03-02","obs":"avo","vName":"Kanaga","vnum":"311110","noticeId":"DOI-USGS-AVO-2012-03-02T20:17:21-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-03-02T20:17:21-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-03-02T20:17:21-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120218\/2211Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKanaga  (VNUM #311110)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 51 deg 55 min W 177 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E4288 ft (1307 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EPossible explosive activity and a likely ash cloud indicate new unrest at Kanaga Volcano.  AVO is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nVolcanic tremor was detected from 15:23-15:27 UTC (6:23 AM AKST) followed by numerous small events for about an hour at Kanaga Volcano. A possible weak ash cloud was also detected in AVHRR satellite data from 15:35 UTC about 39 km (24 mi) NE of the volcano.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis new unrest indicates a possibility for sudden explosions of ash to occur at any time, and ash clouds exceeding 20,000 feet above sea level may develop. If a large, explosive, ash-producing event occurs, the local seismic network, satellite ash alarms, infrasound, and volcanic lightning will alert AVO to the new activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKanaga Volcano occupies the northern corner of Kanaga Island, one of the most southerly members of the central Aleutian chain. It is a symmetric composite cone 1307 m high and 4.8 km in diameter at sea level, built of interbedded basaltic and andesitic lava flows, scoria layers, and pyroclastic rocks. Kanaga Volcano last erupted 1994-1995 when observed eruptive plumes were relatively dilute, rising to altitudes of less than 3 km (9,840 ft) and dropping ash onto the flanks of the volcano. At least two significant ash plumes were recorded over the course of this eruption: the first, to ~7.5 km (24,600 ft) occurred on February 21, 1995 and the second on August 18,1995, when an eruption cloud reached ~4.5 km (14,760 ft). A light dusting of ash fell on the community of Adak and air traffic was disrupted due to continuing low-level activity and cloudy conditions which prevented visual approaches to the Adak air field.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Elevated seismicity and a possible low-level ash cloud","sentUtc":"2012-02-18","obs":"avo","vName":"Kanaga","vnum":"311110","noticeId":"DOI-USGS-AVO-2012-02-18T22:11:58-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-02-18T22:11:58-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-02-18T22:11:58-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120201\/0021Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERenewed eruptive activity of Cleveland Volcano has been observed in satellite data, and AVO is raising the Aviation Color Code to Orange and the Alert Level to Watch. A new lava dome has been observed in the summit crater, and as of 30 January 2012 was approximately 40 meters (130 feet) in diameter. There have been no observations of ash emissions or explosive activity during this current lava eruption.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe lava dome that formed throughout the fall-winter of 2011 was largely removed by the explosive activity on 25 and 29 December, 2011. It remains possible for intermittent, sudden explosions of blocks and ash to occur at any time, and ash clouds exceeding 20,000 feet above sea level may develop. Such explosions and their associated ash clouds may go undetected in satellite imagery for hours. If a large, explosive, ash-producing event occurs, seismic, infrasound, or volcanic lightning may be detected by local and regional monitoring networks. There is no real-time seismic monitoring network on Mount Cleveland.     \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional information on Cleveland Volcano and the current activity may be found at this link:\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\/activity\/Cleveland.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease see http:\/\/www.avo.alaska.edu\/color_codes.php for complete definitions of Aviation color codes and Volcano alert levels.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo volcanic cloud observed.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite observations indicate renewed eruptive activity. As of 30 January, a new lava dome has been erupted in the summit crater. No ash emissions or explosions.","sentUtc":"2012-02-01","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2012-02-01T00:21:30-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-02-01T00:21:30-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-02-01T00:21:30-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20120127\/2321Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EWrangell  (VNUM #315020)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2012\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 62 deg  W 144 deg 1 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tWrangell Volcanic Field\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E14163 ft (4317 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO can no longer seismically monitor Wrangell volcano because of seismic station outages. As a result, AVO is unable to assess seismic activity at this volcano. As at other volcanoes without real-time seismic networks, AVO will continue to use satellite data and reports from pilots and ground observers to detect signs of eruptive activity. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBecause Wrangell is no longer seismically monitored, we are changing both the Volcano Alert Level from Normal and Aviation Color Code from Green to \u0022UNASSIGNED\u0022. Wrangell will likely remain without real-time seismic monitoring until the summer of 2012, when necessary upgrades to the network will occur. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMt. Wrangell is a 4317 m (14,163 ft) high, andesitic, shield volcano with an ice-filled summit caldera, located in the Wrangell-St. Elias National Park and Preserve. Mt. Wrangell has three small post-caldera craters, named North Crater, East Crater, and Mt. Zanetti.  These craters are all geothermally active, and there are frequent historical reports of steam from Mt. Wrangell.  There are also several questionable reports of historical eruptive activity.  Mt. Wrangell is 330 km (206 mi) northeast of Anchorage.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The Wrangell seismic network is out so we are removing it from our list of monitored volcanoes.","sentUtc":"2012-01-27","obs":"avo","vName":"Wrangell","vnum":"315020","noticeId":"DOI-USGS-AVO-2012-01-27T23:21:16-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2012-01-27T23:21:16-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2012-01-27T23:21:16-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20111230\/2257Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECleveland Volcano is has been lowered to aviation color code YELLOW and alert level ADVISORY.  No new explosive activity has been observed at the volcano since  yesterday morning.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA detached drifting ash cloud from the volcano was detected early yesterday morning in satellite imagery.  Ground coupled air waves from the explosion were detected at a distant seismic network located on Okmok Volcano that place the time of the explosion from Cleveland at 13:12 UTC, Dec. 29. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIntermittent lava eruption from late July through early October emplaced a dome at the summit.  There is a possibility that effusion could resume and send lava over the crater rim and down the steep flanks of the volcano. Such lava flows might collapse and produce avalanches of hot debris that reach the sea and may be accompanied by small ash clouds.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMore sudden explosions producing ash or ejecting blocks could also occur with plumes exceeding 20,000 feet above sea level. Such explosions and their associated ash clouds may go undetected in satellite imagery for hours. However, in cooperation with the University of Washington, AVO has implemented a lightning alarm system that may detect significant ash-producing events within minutes of onset. If a large explosive event occurs, seismic signals may be recorded on AVO seismic networks at nearby volcanoes. There is no real-time seismic monitoring network at Cleveland.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional information on Cleveland Volcano and the current activity may be found at this link:\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\/activity\/Cleveland.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease see http:\/\/www.avo.alaska.edu\/color_codes.php for complete definitions of Aviation color codes and Volcano alert levels.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nChris Nye, Acting Coordinating Scientist\u003Cbr \/\u003E\r\ncnye@giseis.alaska.edu (907) 474-7430\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No new explosive activity has been detected at Cleveland. Continued activity uncertain. ","sentUtc":"2011-12-30","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-12-30T22:57:44-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-12-30T22:57:44-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-12-30T22:57:44-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20111229\/1655Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA detached drifting ash cloud to approximately 15,000 ft ASL has been detected at Cleveland Volcano in satellite images from 1402 UTC, Dec 29. As of 1445 UTC the ash cloud was approximately 80 KM\/50 miles moving ESE from the volcano.   \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBased on the presence of an ash cloud, AVO has raised the aviation color code at Cleveland Volcano to ORANGE and alert level WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite data indicate that this is a single explosion event, however, more sudden explosions producing ash could occur with plumes exceeding 20,000 feet above sea level. Such explosions and their associated ash clouds may go undetected in satellite imagery for hours. However, in cooperation with the University of Washington, AVO has implemented a lightning alarm system that may detect significant ash-producing events within minutes of onset. If a large explosive event occurs, seismic signals may be recorded on AVO seismic networks at nearby volcanoes. There is no real-time seismic monitoring network at Cleveland.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional information on Cleveland Volcano and the current activity may be found at this link:\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\/activity\/Cleveland.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease see http:\/\/www.avo.alaska.edu\/color_codes.php for complete definitions of Aviation color codes and Volcano alert levels.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E15,000 ft\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003Edetached plume moving ESE from the volcano\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nChris Nye, Acting Coordinating Scientist\u003Cbr \/\u003E\r\ncnye@giseis.alaska.edu (907) 474-7430\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An ash plume to 15,000 ft has been detected at Cleveland. Continued activity uncertain. ","sentUtc":"2011-12-29","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-12-29T16:55:35-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-12-29T16:55:35-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-12-29T16:55:35-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20111103\/1916Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite observations of Cleveland Volcano over the past three weeks have consistently indicated that the lava dome in the summit crater has not significantly changed in size indicating that the slow eruption of lava may have paused or stopped. Thermal features also observed in satellite data indicate that the lava dome remains hot. When atmospheric conditions permit, thermal features at the summit will be detected until the lava dome cools.  Based on satellite observations indicating no significant change in the size of the lava dome, and no reports of explosive activity or ash emission, AVO is lowering the Aviation Color Code and Volcano Alert Level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible for effusion of lava to resume at any time and continued production of lava in the summit crater could result in lava flows that overtop the crater rim and flow down the flanks of the volcano. Such lava flows could collapse and produce avalanches of hot debris that reach the sea and may be accompanied by small ash clouds.  A sudden explosion and ash cloud exceeding 20,000 feet above sea level could also occur. Such explosions may go undetected in satellite imagery for hours. However, in cooperation with the University of Washington, AVO has implemented a lightning alarm system that may detect significant ash-producing events within minutes of onset. If a large explosive event occurs, seismic signals may be recorded on AVO seismic networks at nearby volcanoes; however, there is no real-time seismic network on Mt. Cleveland. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAdditional information on Cleveland Volcano and the current activity may be found at this link:\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\/activity\/Cleveland.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No eruptive activity observed. ","sentUtc":"2011-11-03","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-11-03T19:16:04-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-11-03T19:16:04-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-11-03T19:16:04-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20110907\/0008Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EObservations of Cleveland Volcano from Tuesday September 6, 2011 show that the small lava dome in the summit crater has resumed growth and now fills the floor of the crater.  In response, AVO is raising the Aviation Color Code to Orange and the Alert Level to Watch. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA persistent thermal anomaly has been observed since September 3, probably marking the timing of resumed lava dome growth.  The size of the dome as of August 30 when it appeared to have stopped growing was approximately 80 meters (262 feet)in diameter.  The current dome is approximately 120 meters (394 feet) in diameter.  If dome growth continues, lava flows onto the flanks of the volcano may develop but would not be hazardous to aviation. The presence of the lava dome increases the possibility of an explosive eruption, but does not necessarily indicate that one will occur. Short-lived explosions could produce an ash cloud that exceeds 20,000 ft above sea level. These events can occur without warning and may go undetected in satellite imagery for hours.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network on the volcano, AVO is unable to track local earthquake activity related to volcanic unrest, provide forecasts of eruptive activity, or confirmation of explosive, ash-producing events. AVO will continue to monitor the volcano using satellite data as it becomes available.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Thermal anomalies and dome growth have resumed. ","sentUtc":"2011-09-07","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-09-07T00:08:56-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-09-07T00:08:56-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-09-07T00:08:56-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20110830\/2102Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data obtained over the past two weeks indicates that growth of the lava dome at Cleveland volcano has paused or stopped. The recent period of eruption appears to have been predominantly effusive in character and confined to the summit crater. No significant ash emissions have been detected during the period of dome growth. For these reasons AVO is lowering the aviation color code\/alert level from Orange\/Watch to Yellow\/Advisory. The lava dome could resume growth at any time, and explosive activity and ash emissions remain a possibility. \u003Cbr \/\u003E\r\n   \u003Cbr \/\u003E\r\nWithout a real-time seismic network on the volcano, AVO is unable to track local earthquake activity related to volcanic unrest, provide forecasts of eruptive activity, or confirmation of explosive, ash-producing events. AVO will continue to monitor the volcano using satellite data as it becomes available.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Mostly cloudy. No activity reported.","sentUtc":"2011-08-30","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-08-30T21:02:25-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-08-30T21:02:25-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-08-30T21:02:25-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20110802\/2343Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EObservations of Cleveland Volcano from Friday July 29, 2011 show a small lava dome about 40 meters (131 feet) in diameter in the summit crater. In response, AVO is raising the Aviation Color Code to Orange and the Alert Level to Watch. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe lava dome was extruded sometime after July 7 when the last clear view of the summit area was acquired.  The formation of a lava dome is consistent with observed thermal anomalies seen since July 19, 2011 suggesting that the dome extruded since that time. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA weak thermal anomaly persists at the summit and may indicate that the lava dome continues to slowly grow or that dome growth has ceased and the dome is slowly cooling.  If dome growth continues, lava flows onto the flanks of the volcano may develop but would not be hazardous to aviation.  The presence of the lava dome increases the possibility of an explosive eruption, but does not necessarily indicate that one will occur.  Short-lived explosions could produce an ash cloud that exceeds 20,000 ft above sea level.  These events can occur without warning and may go undetected in satellite imagery for hours.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest, provide forecasts of potential eruptions, or confirmation of explosive activity. Low-level ash emissions and elevated surface temperatures such as those observed recently do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"small lava dome has been observed in the summit crater. ","sentUtc":"2011-08-02","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-08-02T23:43:50-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-08-02T23:43:50-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-08-02T23:43:50-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20110720\/2248Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the volcano alert level\/aviation color code at Cleveland Volcano from unassigned to ADVISORY\/YELLOW based on the presence of persistent thermal anomalies seen in satellite data yesterday and today.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENil\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emission was in September 2010.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"AVO is raising the volcano alert level\/aviation color code to ADVISORY\/YELLOW based on the detection of Thermal anomalies in satellite data. ","sentUtc":"2011-07-20","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-07-20T22:48:16-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-07-20T22:48:16-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-07-20T22:48:16-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20110331\/2007Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2011\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EBased on a lack of confirmed eruptive activity over the past several months, AVO is downgrading the alert level and aviation color code to UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRecent clear satellite views of the Cleveland summit show no significant thermal anomalies or evidence of recent explosive events such as ash deposits on snow.  The last ash-producing event at Cleveland was in September 2010, when a small, very short-lived ash plume reached 25,000 feet above sea level.  Since then, occasional periods in which thermal anomalies have been observed in satellite imagery suggest that low-level unrest has continued without any eruption of ash.  The last weak thermal anomaly at Cleveland was detected early this morning. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDaily reports on the volcano will cease.  We wish to emphasize, however, that Cleveland Volcano experiences frequent episodes of low-level unrest; the summit crater at Cleveland often emits visible plumes of water vapor and possibly small quantities of volcanic gas.  Heat associated with this process can produce occasional weak thermal anomalies detected by satellite; however, these do not always indicate eruptive activity has occurred or is imminent.  \u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nAVO is unable to designate NORMAL\/GREEN at Cleveland due to the lack of a seismic network to determine background levels of seismicity.  Sudden, short-lived explosive events could occur without warning and send ash above 20,000 ft above sea level.  These explosions could go undetected on satellite imagery for hours. AVO relies upon twice-daily satellite analysis of Cleveland, as well as pilot and mariner reports, to look for evidence of increasing activity or ash clouds.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENo cloud observed.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ENil\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nCleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emission was in September 2010.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Based on a lack of confirmed eruptive activity over the past several months, AVO is downgrading the alert level and aviation color code to UNASSIGNED. ","sentUtc":"2011-03-31","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2011-03-31T20:07:09-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2011-03-31T20:07:09-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2011-03-31T20:07:09-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100912\/1926Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the volcano alert level\/aviation color code at Cleveland Volcano from unassigned to ADVISORY\/YELLOW based on the presence of thermal anomalies in satellite data yesterday and a possible ash plume this morning. Satellite images of Cleveland Volcano this morning have detected a possible ash plume drifting east from the volcano. Estimated plume height is about 25,000 ft above sea level. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest.  Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Minor ash emission detected in satellite imagery.   ","sentUtc":"2010-09-12","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2010-09-12T19:26:42-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-09-12T19:26:42-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-09-12T19:26:42-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100910\/1842Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeveral clear-weather satellite views of Cleveland from September 7 and 8 reveal no thermal anomaly nor recent deposits. The last observed thermal anomaly was on September 1. AVO is therefore moving the volcano alert level\/aviation color code from Advisory\/Yellow to UNASSIGNED.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest.  Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No reports of activity.   ","sentUtc":"2010-09-10","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2010-09-10T18:42:13-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-09-10T18:42:13-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-09-10T18:42:13-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100826\/2352Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent clear-weather satellite views of Cleveland volcano detect a persistent thermal anomaly at the summit of Cleveland.  The presence such an anomaly increases the probability of an ash emission from Cleveland.  AVO is therefore moving the volcano alert level\/aviation color code from UNASSIGNED to Advisory\/Yellow.  AVO continues to monitor the volcano using satellite imagery.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent.  Short-lived explosions with ash clouds or plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EUnknown\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Persistent thermal anomaly observed in satellite data. Moving to Yellow.","sentUtc":"2010-08-26","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2010-08-26T23:52:09-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-08-26T23:52:09-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-08-26T23:52:09-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100611\/1928Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo signs of activity at Cleveland Volcano have been observed since a small low-level ash burst occurred on June 1. Recent clear-weather satellite views of the volcano show no thermal anomaly at the summit nor any evidence for new ash production or debris flows on the upper flanks. Thus we are moving the volcano alert level\/aviation color code from Advisory\/Yellow to UNASSIGNED. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nWithout a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent.  Short-lived explosions with ash clouds or plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity observed in satellite data. Moving to unassigned.","sentUtc":"2010-06-11","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2010-06-11T19:28:37-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-06-11T19:28:37-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-06-11T19:28:37-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100526\/0117Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThermal anomalies observed in satellite data over the past few days suggest that Cleveland Volcano has entered another period of volcanic unrest.  In the past, the presence of thermal anomalies at the summit has been followed by moderate ash bursts, sometimes to aircraft flight levels.   Therefore, AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Unrest at Cleveland is frequent, and short-lived explosions with ash clouds or plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January, June, and October 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Persistent thermal anomalies observed over the last few days.  Aviation Color Code\/Volcano Alert Level raised to Yellow\/advisory  ","sentUtc":"2010-05-26","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2010-05-26T01:17:50-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-05-26T01:17:50-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-05-26T01:17:50-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100412\/2110Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Redoubt has diminished significantly from early last week.  Based on this decline and the lack of continuing signs of unrest, AVO is lowering the Aviation Color Code and Volcano Alert Level at Redoubt Volcano to GREEN\/NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe swarm of small, shallow earthquakes that began Monday April 5 has ceased and seismic activity beneath the volcano has returned to background levels. Aerial observations of the new lava dome on April 8 and 9 indicated no significant changes at the surface and no sign of instability. Scattered patches of discolored snow and ice on the south side of the mountain may represent wind-remobilized rockfall debris or ash from the 2009 eruption. Alternatively, periods of more vigorous gas emission may entrain small amounts of tiny dome rock fragments that are carried over the crater rim.  Most of the dome surface is snow covered although there are areas of continued high-temperature gas emission. Measured levels of magmatic gas emission on April 8 and 9 are below those measured in December 2009, a trend expected for a slowly cooling and degassing lava dome.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAVO will continue to monitor conditions at Redoubt, but while we have no volcanoes at elevated color codes or alert levels, we will cease our usual daily reporting of activity and instead transmit a weekly summary only.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, 1989-90, and 2009. The 1989-90 and 2009 eruptions produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 and 2009 eruptions significantly disrupted air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other communities in south-central and interior Alaska.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ncwaythomas@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907)322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Earthquake activity at Redoubt Volcano near background. Threat of renewed activity diminished.  ","sentUtc":"2010-04-12","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2010-04-12T21:10:51-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-04-12T21:10:51-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-04-12T21:10:51-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100405\/1959Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY at Redoubt volcano. This morning, at roughly 01:44 AKDT (0944 UTC) a series of small repetitive earthquakes began occurring in the vicinity of the volcano's summit. Activity is continuing this morning. See http:\/\/www.avo.alaska.edu\/webicorders\/Redoubt\/RSO_EHZ_AV.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThese earthquakes may be precursory to renewed eruptive activity at the volcano and increased instability of the lava dome. Whether this will result in explosive activity or failure of the lava dome is unknown at this time. However, there is a heightened possibility of volcanic activity that would produce a volcanic ash cloud, pyroclastic avalanches, and lahars and flooding down the Drift River.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, 1989-90, and 2009. The 1989-90 and 2009 eruptions produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 and 2009 eruptions significantly disrupted air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other communities in south-central and interior Alaska.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ncwaythomas@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Earthquake activity at Redoubt Volcano has increased. The Aviation Color Code is raised to Yellow and the Alert Level to Advisory.","sentUtc":"2010-04-05","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2010-04-05T19:59:33-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-04-05T19:59:33-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-04-05T19:59:33-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20100106\/0032Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2010\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EBased on the low level of seismic activity and lack of any obvious outward signs of progressing unrest, AVO is lowering the Aviation Color Code and Volcano Alert Level at Redoubt Volcano to GREEN\/NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe swarm of small, shallow earthquakes that began Sunday, December 27 has ceased and the degree of seismic activity beneath the volcano has returned to background levels. Aerial observations of the new lava dome on December 31 indicated no obvious changes at the surface and no sign of instability. Thermal images also obtained on December 31 indicate that parts of the dome are still hot, although most of the dome surface remains cold and snow covered. Magmatic gas emission from the dome area on December 31 was slightly elevated compared to the last measurement in early November, but not enough to warrant great concern.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is likely that existing magma within the volcano's shallow plumbing system was temporarily remobilized, causing the increase in seismicity, but this process appears to have ended. It is possible for activity to resume at any time and if it does, we expect to observe a distinct increase in seismicity as well as other outward signs of unrest such as increased melting and steaming in the vicinity of the lava dome or rock fall activity on the slopes of the dome.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAVO will continue to monitor conditions at Redoubt, but while we have no volcanoes at elevated color codes or alert levels, we will cease our usual daily reporting of activity and instead transmit a weekly summary only.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, 1989-90, and 2009. The 1989-90 and 2009 eruptions produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 and 2009 eruptions significantly disrupted air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other communities in south-central and interior Alaska.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Earthquake activity at Redoubt Volcano remains low. The Aviation Color Code is lowered to Green and the Alert Level to Normal.","sentUtc":"2010-01-06","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2010-01-06T00:32:11-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2010-01-06T00:32:11-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2010-01-06T00:32:11-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20091228\/1853Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A53\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY at Redoubt volcano. At roughly 16:00 AKDT yesterday Dec. 27 (0100 Dec. 28 UTC) a series of small repetitive earthquakes began occurring in the vicinity of the volcano's summit. Activity is continuing this morning.  See http:\/\/www.avo.alaska.edu\/webicorders\/Redoubt\/RSO_EHZ_AV.php \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThese earthquakes may be precursory to renewed eruptive activity at the volcano and increased instability of the lava dome. Whether this will result in explosive activity or failure of the lava dome is unknown at this time. However, there is a heightened possibility of volcanic activity that would produce a volcanic ash cloud, pyroclastic avalanches, and lahars and flooding down the Drift River.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, 1989-90, and 2009. The 1989-90 and 2009 eruptions produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 and 2009 eruptions significantly disrupted air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other communities in south-central and interior Alaska.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"A series of small repetitive earthquakes under Redoubt volcano that began Dec. 27 persists.  The Aviation color code raised to Yellow and alert level to Advisory.","sentUtc":"2009-12-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-12-28T18:53:11-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-12-28T18:53:11-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-12-28T18:53:11-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20091019\/2047Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A48\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo eruptive activity has been observed at Cleveland since the brief eruption at approximately 2330 AKDT October 2 (0730 UTC October 3), and recent clear nighttime satellite views showed no signs of activity.  Therefore, AVO is reducing the Aviation Color Code to UNASSIGNED and the Volcano Alert Level to UNASSIGNED.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Unrest at Cleveland is frequent, and short-lived explosions with ash plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7403\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No signs of activity since the brief eruption on October 2, 2009. Aviation Color Code\/Volcano Alert Level reduced to Green\/Normal  ","sentUtc":"2009-10-19","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-10-19T20:47:35-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-10-19T20:47:35-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-10-19T20:47:35-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20091019\/2045Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A47\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ERecent clear satellite views of Shishaldin show no activity at the volcano, with the last thermal anomaly observed on August 16. While seismicity remains variable, it is still within background levels for this volcano. Shishaldin has had intermittent periods of unrest since January 2009, typically accompanied by thermal anomalies and increased steam emissions. The apparent waning of this activity over the past two months prompts AVO to reduce the Aviation Color Code to GREEN and the Volcano Alert Level to NORMAL.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A small summit crater typically emits a noticeable steam plume with occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, erupting atleast 28 times since 1775.  Most of Shishaldin's eruptions have consisted of small ash and steam plumes, although the most recent eruption in April-May 1999 produced an ash column that reached a height of 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMichelle Coombs, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nmcoombs@usgs.gov (907) 786-7403\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Last thermal anomaly seen in satellite images in mid August.  Seismicity remains low.  Aviation Color Code reduced to GREEN and Volcano Alert Level reduced to NORMAL ","sentUtc":"2009-10-19","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2009-10-19T20:45:35-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-10-19T20:45:35-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-10-19T20:45:35-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20091005\/2320Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A46\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ENo additional eruptive activity has been observed at Cleveland since the brief eruption at approximately 2330 AKDT October 2 (0730 UTC October 3). Clear satellite views from this morning show nothing unusual at the volcano. Thus we are lowering the aviation color code and volcano alert level to YELLOW\/ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe October 2 eruption produced a small, detached ash cloud at maximum altitudes of 15,000' to 20,000' (4.5 - 6.1 km). Such events are typical of Cleveland activity. While no more events have been detected, further eruptive activity is possible at any time.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nNote: In the initial notification of this event and two subsequent status reports, the event's date was incorrectly stated as \u00220730 UTC (2330 AKDT) 02 October 2009.\u0022 \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Aviation color code and volcano alert level lowered to yellow\/advisory at Cleveland Volcano. No more ash events observed.","sentUtc":"2009-10-05","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-10-05T23:20:45-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-10-05T23:20:45-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-10-05T23:20:45-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20091003\/1129Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A45\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data indicate that Cleveland volcano erupted briefly this morning at ~0730 UTC (2330 AKDT) 02 October 2009, producing an ash cloud to maximum altitudes of 15,000' to 20,000' (4.5 - 6.1 km). Thus, the aviation color code is being increased to Orange, and the volcano alert level is being increased to Watch. Further eruptive activity is possible.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EStephanie Prejean, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nsprejean@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"AVO raising aviation color code and volcano alert level to orange\/watch at Cleveland Volcano.","sentUtc":"2009-10-03","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-10-03T11:29:59-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-10-03T11:29:59-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-10-03T11:29:59-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090929\/1944Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A44\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several months, seismic activity, volcanic gas output, ground deformation, lava dome temperatures, and outward signs of lava dome instability at Redoubt Volcano have been declining.   The volcano appears to have returned to its normal background condition and for now poses no immediate threat of eruptive activity.  Accordingly, AVO is lowering the Aviation Color Code to GREEN and the Volcano Alert Code to NORMAL.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSince it began growing in early April 2009, the lava dome in the summit crater at the top of the Drift glacier canyon has reached a volume of approximately 70 million cubic meters (91 million cubic yards). Lava domes, particularly those built on steep slopes, are typically unstable and subject to sudden collapse. A dome collapse at Redoubt would likely produce ash clouds and falls, hot block-and-ash flows, and downstream flooding and lahars. However, based on the length of time since the cessation of dome growth (more than 60 days), AVO believes the possibility for dome collapse is small and declining toward a background level of danger typical of many active stratovolcanoes with steep unstable rock slopes.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRedoubt's new lava dome remains hot and gas-rich and will continue to pose local hazards for some time. High levels of sulfur dioxide, carbon dioxide, and hydrogen sulfide may occur near the dome, as will rock falls and abundant steaming. Depending on wind and cloud conditions, sulfur smells could reach populated areas and steam plumes will be visible on occasion. Small outbursts of impounded water, not associated with a dome collapse, are possible, but these are unlikely to pose a threat much beyond the upper Drift River. As temperatures in the area begin to decline and winter freeze up occurs, the likelihood of flooding of the valleys of the lower Drift River, Rust Slough, Cannery Creek, and Montana Bill Creek will also decline. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAt this time it is not known if the volcano is entering a prolonged period of quiet, as it did after the 1966-68 and 1989-90 eruptions when the volcano exhibited little to no unrest for periods of about 20 years.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA resumption of eruptive activity at Redoubt in the near future is possible, but AVO considers this scenario unlikely. Hours to days of precursory seismicity would likely precede resumed activity, providing AVO ample time to issue prompt forecasts of possible volcanic hazard.  AVO continuously monitors Redoubt with an alarm system that alerts on-call staff of potential unrest.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Color code downgrade to GREEN at Redoubt as activity remains low.  Possibility of lava dome collapse continues to diminish.","sentUtc":"2009-09-29","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-09-29T19:44:52-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-09-29T19:44:52-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-09-29T19:44:52-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090715\/2311Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A43\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is lowering the aviation color code and volcano alert level to unassigned at Cleveland Volcano. AVO has observed no further activity at Cleveland since a small eruption occurred on June 25. The volcano has been mostly obscured by clouds since June 28, and there have been no reports of activity from nearby aircraft or boats in the region. It appears that the event on June 25 was brief and and no additional ash emissions have occurred since then. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland Volcano is not monitored with seismic instruments and activity is detected primarily with satellite data. Alert levels are assigned on the basis of review and interpretation of this data. Because Cleveland Volcano is not monitored with seismic instruments, it receives the designation \u0022unassigned\u0022 rather than \u0022Green\/Normal.\u0022  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland Volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January and June 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"AVO is lowering the aviation color code and volcano alert level to unassigned at Cleveland Volcano.","sentUtc":"2009-07-15","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-07-15T23:11:36-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-07-15T23:11:36-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-07-15T23:11:36-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090710\/2314Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A42\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is rasing the Aviation Color Code to YELLOW and the Alert Level to ADVISORY at Shishaldin Volcano based on the presence of a persistent thermal anomaly in the summit crater.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBeginning in January 2009, a distinct thermal feature in the summit crater has been observed intermittently in satellite imagery. Over the past month, the intensity of this thermal feature has increased. AVO has observed this thermal anomaly several times  over the past week while satellite viewing conditions were favorable. The increase in thermal emissions at Shishaldin mark a change from the normal background observed since the end of the previous eruption in 1999.  Seismicity at the volcano has not changed appreciably over the time interval during which the thermal anomaly has been observed. Tiltmeters operated by UNAVCO with the National Science Foundation's Earthscope Project on the north and west flanks of the volcano show no deformation of the volcano during this time period. Satellite observations show no significant sulfur dioxide gas emissions. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO has received a few reports of steaming from the summit crater, which has also been observed in satellite imagery. However, this is not necessarily anomalous activity for this volcano, and the unrest observed over the past several weeks does not indicate that an eruption is imminent. AVO will continue to watch Shishaldin carefully for additional signs of increased unrest.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A small summit crater typically emits a noticeable steam plume with occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, erupting atleast 28 times since 1775.  Most of Shishaldin's eruptions have consisted of small ash and steam plumes, although the most recent eruption in April-May 1999 produced an ash column that reached a height of 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 474-7992\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcano has persistent thermal anomaly in summit crater - no indications that an eruption is imminenet","sentUtc":"2009-07-10","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2009-07-10T23:14:25-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-07-10T23:14:25-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-07-10T23:14:25-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090630\/1920Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A41\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is lowering the Aviation Color Code to Yellow and the Alert Level to Advisory at Redoubt volcano. Seismic, satellite, gas, and deformation observations over the past few weeks indicate that growth of the lava dome at Redoubt has significantly slowed, if not stopped, and therefore it is possible that the current eruptive activity has ended. However, it is unknown if this represents the end of the 2009 eruption of Redoubt or if the activity has only paused temporarily and might resume in the next months. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe large lava dome located at the north side of the summit crater, and extending down the Drift Glacier Gorge, still presents a hazard. It is possible that this large mass of fresh lava is unstable and could fail with little or no warning, leading to significant ash production and possible lahars in the Drift River valley.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to monitor Redoubt's activity closely, but begin to transition off 24\/7 staffing. Later updates will describe operational changes as they occur.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe 2009 eruption of Redoubt volcano began March 15th, 2009 with a steam explosion. Between March 22nd and April 4th, Redoubt produced multiple significant explosions that sent ash and gas clouds to as high as 65,000 feet (19.8 km) above sea level that significantly disrupted air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other nearby communities.  Voluminous mudflows inundated the Drift River Valley as far as Cook Inlet on March 23 and April 4.  After April 4th, the eruption continued with extrusion of a lava dome within the summit crater, eventually producing a blocky lava flow that currently extends ~0.6 miles (1 km) down the north flank of the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano that rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, 1989-90, and 2009. \u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJessica Larsen, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nfaust@gi.alaska.edu (907) 322-4085\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Lowering alert level to Yellow\/Advisory.  Growth of lava dome significantly slowed, if not stopped.","sentUtc":"2009-06-30","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-06-30T19:20:03-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-06-30T19:20:03-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-06-30T19:20:03-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090628\/0113Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A40\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is downgrading the aviation color code at Cleveland volcano to Yellow, and the volcano alert level to Advisory.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA small eruption at Cleveland volcano occurred Thursday, June 25, producing an ash plume that rose to less than 15,000 ft. above sea level.  The plume, observed in satellite images, quickly detached from the volcano and moved south.  There have been no further reports of activity.  Such small, short-lived events are typical of Cleveland volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAVO monitors Cleveland Volcano with satellite imagery as weather allows. The lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions of ash that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.  Please see http:\/\/www.avo.alaska.edu\/activity\/Cleveland.php for more information.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and had 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. This eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed on June 25, 2009.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Downgrading to Yellow\/Advisory.  Small eruption on June 25, no further activity reported.","sentUtc":"2009-06-28","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-06-28T01:13:23-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-06-28T01:13:23-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-06-28T01:13:23-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090625\/2300Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A39\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA small eruption at Cleveland volcano occurred today and AVO is raising the Aviation Color Code to Orange and the Alert Level to Watch.  An ash plume from the volcano was seen in satellite images from 1915 UTC (11:15 AKDT) today. The plume has detached from the volcano is moving south.  Estimated plume height is less than 15,000 ft. above sea level. \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and had 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. This eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small eruption, possible ash cloud <15,000 ft above sea level. ","sentUtc":"2009-06-25","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-06-25T23:00:30-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-06-25T23:00:30-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-06-25T23:00:30-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090526\/2042Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A38\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Veniaminof Volcano on the Alaska Peninsula has diminished over the past week.  The aviation color code and volcano alert level are returned to Green\/Normal.  AVO received no reports of unusual activity from pilots or observers in the area after going to Yellow\/Advisory on May 7.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity returns to near background.  Aviation color code dropped to Green, Alert level to Normal.","sentUtc":"2009-05-26","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2009-05-26T20:42:13-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-05-26T20:42:13-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-05-26T20:42:13-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090508\/0206Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVeniaminof  (VNUM #312070)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A37\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 56 deg 11 min W 159 deg 23 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAlaska Peninsula\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E8225 ft (2507 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past day, earthquake activity has increased at Mount Veniaminof volcano. This increase is a significant change from normal background activity and AVO is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nVisual reports today from Perryville indicate typical steaming from the summit caldera cone that has been the site of activity over recent years. No ash has been observed or detected in satellite images, but low-level ash emissions could occur with very little additional warning.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCurrently the earthquakes are small in magnitude but are registering across the entire seismic network. Seismicity rates are high and have varied between 5-10 earthquakes per hour during quieter periods to 1-3 earthquakes per minute during more intense activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease note that the Veniaminof web camera is currently not operating. Plans have been made to fix this camera, but the time frame is uncertain.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EMount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~ 300 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing  intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone.  During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, and early November 2006, and February to March 2008. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, and observer reports. Please see http:\/\/www.avo.alaska.edu\/activity\/Veniaminof.php for more information.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nwest@gi.alaska.edu (907) 474-6977\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased earthquake activity above background levels. Low altitude ash emission are possible but not certain.","sentUtc":"2009-05-08","obs":"avo","vName":"Veniaminof","vnum":"312070","noticeId":"DOI-USGS-AVO-2009-05-08T02:06:22-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-05-08T02:06:22-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-05-08T02:06:22-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090505\/1559Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A36\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECurrent activity at Redoubt volcano suggests that a significant explosive event is likely, though not certain, in the coming days. This event could occur at any time with little or no warning. Since about May 2 shallow earthquake activity beneath the actively growing lava dome of Redoubt volcano has been slowly increasing.  The growing lava dome is becoming increasingly unstable.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nShould a significant explosion occur, the event will likely produce high altitude (>30,000 ft ASL) ash plumes, trace to minor ash fall in parts of south-central Alaska, lahars in the Drift River Valley, and pyroclastic flows in the immediate vicinity of the volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO continues 24\/7 operations and is monitoring the situation closely.  AVO will provide frequent updates of the volcano's status and the earliest possible warning of significant explosive activity and other hazardous phenomena.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe seismic activity is primarily characterized by repetitive events occurring several times per minute as well as more continuous volcanic tremor.  Similar seismicity has been observed prior to several explosions earlier in the 2009 eruptive sequence and many of the explosive events during the 1989-90 eruption.  The lava dome that has grown in Redoubt's summit crater is now roughly equal in size to the largest dome that was emplaced during the 1989-90 eruption.  As the dome grows larger it is increasingly unstable with a growing likelihood of a complete or partial dome failure.  Recent observations indicate that small, ash-producing rockfalls from the dome's north side are becoming more frequent.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nwest@gi.alaska.edu (907) 474-6977\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Activity continues to increase.  An explosive event is likely, though not certain, in the coming days.","sentUtc":"2009-05-05","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-05-05T15:59:43-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-05-05T15:59:43-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-05-05T15:59:43-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090501\/1731Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A35\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is lowering the Aviation Color Code and Alert Level at Cleveland volcano to UNASSIGNED.  No volcanic activity of significance has been detected at Cleveland since late January 2009. Satellite images have shown no evidence of ash emission or thermal anomalies in the summit area.  Because Cleveland is not monitored in real-time with a seismic network, we cannot confidently state that the volcano has returned completely to a background level of quiescence. Therefore, we use the term UNASSIGNED to characterize the state of the volcano and hazards.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano has been intermittently active for a number of years with pauses of months between minor ash explosions.  Additional ash events can occur without warning and, since the volcano is unmonitored in real-time, ash clouds can go undetected for several hours.  AVO uses satellite imagery to evaluate the state of activity at Cleveland.  Frequent periods of poor weather can prevent clear views of the volcano for weeks at a time.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 consisting of 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. This eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in January 2009.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity reported since late January.","sentUtc":"2009-05-01","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-05-01T17:31:41-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-05-01T17:31:41-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-05-01T17:31:41-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090406\/2355Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A34\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Redoubt continues with varying intensity of ash and lava production from the summit crater.  Additional significant explosive events with accompanying ash clouds, ash fall, and mudflows are possible and can occur with little or no warning. Visual, satellite, and seismic observations indicate that a lava dome is again forming in the summit crater.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe character of current seismicity suggests that a sudden explosive eruption is not imminent. Present levels of activity are emitting only a very minor amount of ash that poses a hazard of limited aerial extent.  Consequently, AVO is lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. AVO will maintain 24\/7 operations in order to quickly detect renewed significant explosive activity and other hazardous phenomena.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIntermittent views by the AVO web camera earlier today show a continuous plume composed primarily of water vapor and gas rising above the summit to less than 15,000 feet and drifting northeast.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nPlease see the National Weather Service Redoubt coordination page http:\/\/pafc.arh.noaa.gov\/volcano.php for the latest ash fall information.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, and 1989-90. The 1989-90 eruption produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 eruption affected international air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other nearby communities.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption continues. Lava dome growing in summit crater. Steam plume probably to 15,000 feet. Possibility of sudden explosions, ash clouds, ash fall, and mudflows. ","sentUtc":"2009-04-06","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-04-06T23:55:36-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-04-06T23:55:36-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-04-06T23:55:36-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090404\/1551Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A33\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ECORRECTION OF ALERT LEVEL TO WARNING.  Another significant explosive event occurred at Redoubt Volcano at approximately 5:58 am AKDT (13:58 UTC). At this time, the cloud height is estimated to be 50,000 feet based on National Weather Service radar. The cloud is drifting to the southeast of the volcano.  AVO seismometers indicate a lahar has developed in the Drift River Valley. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Another explosive event underway.  Ash cloud to 50,000 feet and drifting southeast. Lahars in Drift River Valley. ","sentUtc":"2009-04-04","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-04-04T15:51:43-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-04-04T15:51:43-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-04-04T15:51:43-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090404\/1535Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A32\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother significant explosive event occurred at Redoubt Volcano at approximately 5:58 am AKDT (13:58 UTC). At this time, the cloud height is estimated to be 50,000 feet based on National Weather Service radar. The cloud is drifting to the southeast of the volcano.  AVO seismometers indicate a lahar has developed in the Drift River Valley.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":" ","sentUtc":"2009-04-04","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-04-04T15:35:41-00:00","colorCode":"RED","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-04-04T15:35:41-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-04-04T15:35:41-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090403\/2044Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A31\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Redoubt Volcano continues. Over the past several days, the intensity of ash-production has decreased.  Current observations indicate a lava dome is growing in the summit crater.  Therefore, we are lowering the alert level and aviation color code.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe 2009 eruption is now characterized by continuous emission of steam, volcanic gas, and variable amounts of ash.  These processes are occurring as effusion of lava in the summit crater produces a lava dome.  While at this level of activity, trace amounts of ash and a perceptible volcanic haze layer may be intermittently present throughout south-central Alaska. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nA growing lava dome is inherently unstable; a sudden dome collapse or explosion can occur with no warning and produce a more voluminous ash cloud that rises to elevations above 25,000 feet. If such an event is detected, AVO would issue appropriate warnings.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,197 feet above sea level. Recent eruptions occurred in 1902, 1966-68, and 1989-90. The 1989-90 eruption produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 eruption affected air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other nearby communities.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption continues. Steam, gas, and minor ash emission is continuous, typically below 15,000 ft but as high as 25,000 ft at times. Lava dome growth continues. ","sentUtc":"2009-04-03","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-04-03T20:44:52-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-04-03T20:44:52-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-04-03T20:44:52-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090330\/1912Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A30\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn ash emission event at Redoubt volcano occurred at 9:44 AKDT (17:44 UTC) this morning and produced an ash plume to about 27,000 feet above sea level. The event lasted for about 10 minutes and appears to have ended.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERadar showed a cloud top at 27,000 ft above sea level at the time of heightened tremor. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds occasionally extending above 20,000 ft. above sea level.","sentUtc":"2009-03-30","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-30T19:12:07-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-30T19:12:07-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-30T19:12:07-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090330\/1414Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A29\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO has re-analyzed the event reported as an explosive eruption at Redoubt volcano occurring at approximately 23:14 AKDT on March 29 (07:14 UTC March 30). At that time, there was heightened tremor, however, seismic and infrasound data do not show clear evidence that an explosion occurred and this will not be categorized as an explosive eruption.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERadar showed a cloud top above 20,000 ft above sea level at the time of heightened tremor. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds occasionally extending above 20,000 ft. above sea level.","sentUtc":"2009-03-30","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-30T14:14:47-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-30T14:14:47-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-30T14:14:47-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090330\/0835Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A28\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother explosive eruption of Redoubt volcano occurred at approximately 23:14 AKDT (7:14 UTC). NWS reports clouds with radar cloud tops above 20,000 ft above sea level.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds extending above 20,000 ft. above sea level.","sentUtc":"2009-03-30","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-30T08:35:01-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-30T08:35:01-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-30T08:35:01-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090329\/0436Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A27\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother explosive eruption of Redoubt volcano occurred at approximately 19:23 AKDT (03:23 UTC). NWS reports a radar cloud top above 45,000 ft above sea level.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds extending above 45,000 ft. above sea level.","sentUtc":"2009-03-29","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-29T04:36:47-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-29T04:36:47-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-29T04:36:47-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090329\/0043Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A26\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother explosive eruption of Redoubt volcano occurred at approximately 15:29 AKDT (23:29 UTC). NWS reports a radar cloud top above 35,000 ft above sea level.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds extending above 35,000 ft. above sea level.","sentUtc":"2009-03-29","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-29T00:43:32-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-29T00:43:32-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-29T00:43:32-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090328\/2258Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A25\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother explosive eruption of Redoubt volcano occurred at approximately 13:40 AKDT (21:20 UTC). NWS reports a cloud top of 25,000 ft above sea level.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds extending as high as 25,000 ft. above sea level.","sentUtc":"2009-03-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-28T22:58:10-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-28T22:58:10-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-28T22:58:10-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090328\/1029Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A24\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother explosive eruption of Redoubt volcano occurred at approximately 01:20 AKDT (0920 UTC). NWS reports a cloud top of 50,000 ft above sea level.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive activity at Mt. Redoubt continues with eruption clouds extending as high as 50,000 ft. above sea level.","sentUtc":"2009-03-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-28T10:29:44-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-28T10:29:44-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-28T10:29:44-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090328\/0854Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A23\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cb\u003ECORRECTED\u003C\/b\u003E from previous: An explosive eruption of Redoubt volcano occurred at approximately \u003Cb\u003E23:20 AKDT (07:20 UTC)\u003C\/b\u003E. National Weather Service reports the cloud height to be approximately \u003Cb\u003E40,000 ft\u003C\/b\u003E above sea level based on radar.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely, the observatory is staffed 24\/7. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption of Redoubt volcano occurred at 23:20 AKDT (07:20 UTC).  National Weather Service reports an ash cloud height to 40,000 feet above sea level.","sentUtc":"2009-03-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-28T08:54:02-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-28T08:54:02-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-28T08:54:02-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090328\/0829Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A22\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption of Redoubt volcano occurred at approximately 19:25 AKDT (03:25 UTC). National Weather Service reports the cloud height to be approximately 51,000 ft above sea level based on radar.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page \u003Cbr \/\u003E\r\nhttp:\/\/pafc.arh.noaa.gov\/volcano.php  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely, the observatory is staffed 24\/7. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption of Redoubt volcano occurred at 23:20 AKDT (07:20 UTC).  National Weather Service reports an ash cloud height to 40,000 feet above sea level.","sentUtc":"2009-03-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-28T08:29:45-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-28T08:29:45-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-28T08:29:45-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090328\/0434Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A21\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption of Redoubt volcano occurred at approximately 19:25 AKDT (03:25 UTC). National Weather Service reports the cloud height to be approximately 51,000 ft above sea level based on radar.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page http:\/\/pafc.arh.noaa.gov\/volcano.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely, the observatory is staffed 24\/7. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption of Redoubt volcano occurred at 19:25 AKDT (03:25 UTC).  National Weather Service reports an ash cloud height to 51,000 feet above sea level.","sentUtc":"2009-03-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-28T04:34:04-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-28T04:34:04-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-28T04:34:04-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090328\/0249Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A20\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn explosive eruption of Redoubt volcano occurred at approximately 17:35 AKDT (1:35 UTC). National Weather Service reports the cloud height to be approximately 40,000 ft above sea level based on radar.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page http:\/\/pafc.arh.noaa.gov\/volcano.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely, the observatory is staffed 24\/7. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption of Redoubt volcano occurred at 17:35 AKDT (1:35 UTC).  National Weather Service reports an ash cloud height to 40,000 feet above sea level.","sentUtc":"2009-03-28","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-28T02:49:31-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-28T02:49:31-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-28T02:49:31-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090327\/1751Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A19\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption of Redoubt volcano occurred at approximately 08:40 AKDT (16:40 UTC).  National Weather Service reports the cloud height to be approximately 50,000 ft above sea level based on radar. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page http:\/\/pafc.arh.noaa.gov\/volcano.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely, the observatory is staffed 24\/7. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption at Redoubt at 08:40 AKDT. Preliminary cloud heights are reported to about 50,000 ft. above sea level.","sentUtc":"2009-03-27","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-27T17:51:49-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-27T17:51:49-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-27T17:51:49-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090327\/0900Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A18\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption of Redoubt volcano occurred at approximately 23:48 AKDT (7:48 UTC).  National Weather Service reports the cloud height to be at least 32,000 ft above sea level. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor ash fall advisories, refer to the National Weather Service Redoubt Coordination web page http:\/\/pafc.arh.noaa.gov\/volcano.php\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely, the observatory is staffed 24\/7. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption at Redoubt at 23:48 AKDT. Preliminary cloud heights are reported to at least 32,000 ft. above sea level.","sentUtc":"2009-03-27","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-27T09:00:37-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-27T09:00:37-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-27T09:00:37-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090326\/1842Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A17\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA large eruption of Redoubt volcano began at roughly 09:24 AKDT (17:24 UTC).  National Weather Service reports the cloud height to be at least 65,000 ft above sea level. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nRefer to the NWS Redoubt Coordination web page (http:\/\/pafc.arh.noaa.gov\/volcano.php) for latest cloud information.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"A large eruption at Redoubt began at 09:24 AKDT. Cloud heights are reported to at least 65,000 ft. above sea level.","sentUtc":"2009-03-26","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-26T18:42:14-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-26T18:42:14-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-26T18:42:14-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090326\/1756Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A16\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the aviation color code to Red and the alert level to Warning at Redoubt volcano. An explosive event beginning at roughly 08:34 AKDT has produced an eruption cloud to at least 30,000 ft. above sea level.  The event continues.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Explosive event began roughly 08:34.  Reported cloud heights to 30, 000 ft above sea level.","sentUtc":"2009-03-26","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-26T17:56:56-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-26T17:56:56-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-26T17:56:56-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090325\/2235Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A15\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Redoubt Volcano has declined over the last 36 hours, although there have been several brief increases in seismicity associated with minor low-level ash emissions. The last known ash emission was at 5:12 AKDT this morning. The plume from this event did not extend above about 15,000 feet. Based on the level of seismic activity, AVO is lowering the aviation color code to ORANGE and the volcanic alert level to WATCH. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCurrent seismicity at Redoubt is at times suggestive of intermittent lava extrusion at the volcano's summit. However, the existence of a new lava dome has not been confirmed because of poor weather.  Growth of lava domes is common at volcanoes like Redoubt and was observed several times throughout the last eruption of 1989-1990.  As dome size increases, so does the possibility of dome collapse along with a return to a more explosive eruptive style.  Though a distinct rise in seismicity often precedes dome failure, domes can fail with little or no warning and may result in a sudden explosion and ash emission.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBased on observations from the Redoubt eruption of 1989-1990, episodes of dome growth followed by explosive dome destruction is a likely but by no means certain, near-term scenario. Cycles of dome growth and failure could occur for several months. In the event of an escalation in seismic activity or confirmation of a significant ash producing eruption, AVO would accordingly raise the color code and alert level to Red\/Warning.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt is possible that dome collapse events will initiate pyroclastic flows over Drift glacier that will result in meltwater generation and downstream mudflows and floods. Some of these floods could reach Cook Inlet within hours.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOver a 21 hour period beginning on Sunday, at March 22, 2009, 22:38 AKDT (Monday, March 23, 2009, 06:38 UTC ), 6 separate explosions occurred at Redoubt Volcano, each producing ash plumes exceeding 30,000 feet (10,000 m) above sea level. The last of these explosions occurred on Monday, March 23, 2009, at 19:41 AKDT (Tuesday, March 24, 2009, 03:41 UTC), about 36 hours ago as of this writing.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nDuring and following these events, large lahars (volcanic mud and debris flows) were observed traveling down the Drift River Valley, some reaching the mouth of the Valley at the Cook Inlet. Light ashfall (less than 5 mm) from the explosions has been reported at several locales spanning a region of about 100,000 square kilometers, mainly to the north of the volcano.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No explosions in last 36 hours and seismicity has declined.  Possible lava dome growth at the summit. Explosions could resume without much warning.","sentUtc":"2009-03-25","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-25T22:35:06-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-25T22:35:06-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-25T22:35:06-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090325\/1453Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A14\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA small explosion occurred at Redoubt volcano at 05:12 AKDT (1312 UTC).  The cloud height is estimated to be about 15,000 ft and is drifting north to northwest of the volcano.  The event lasted about 10 minutes.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Small explosion at 05:12 AKDT, 1312 UTC, cloud height at 15,000 ft above sea level. ","sentUtc":"2009-03-25","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-25T14:53:13-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-25T14:53:13-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-25T14:53:13-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090324\/0514Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A13\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAnother phase of vigorous ash eruption at Redoubt Volcano began at 7:41 pm (AKDT). AVO remains at Aviation Color Code RED and Alert Level WARNING.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe top of the ash cloud is estimated to be at least 50,000 ft above sea level based on NWS radar.  Winds in the vicinity of the volcano vary with altitude and are expected to carry the ash cloud primarily to the west and north.  Seismicity has declined somewhat since the start of the event but remains elevated.\u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nAVO remains staffed 24 hours per day will issue further information as it becomes available.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFor up-to-date Ashfall Advisories and wind trajectories, please refer to the National Weather Service website: http:\/\/pafc.arh.noaa.gov\/volcano.php\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"A significant explosive event at Redoubt began at 0341 UTC (7:41 pm local).  The top of the volcanic cloud is in excess of 50,000 ft above sea level.  ","sentUtc":"2009-03-24","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-24T05:14:56-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-24T05:14:56-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-24T05:14:56-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090323\/0826Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A12\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe eruption of Mt. Redoubt continues. The height of the eruption cloud is estimated to be 50,000 ft above sea level.  Further reports will be issued as more information becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption of Mt. Redoubt, AK, began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC). Eruption cloud height estimated at 50,000 ft above sea level.","sentUtc":"2009-03-23","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-23T08:26:32-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-23T08:26:32-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-23T08:26:32-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090323\/0756Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A11\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAn eruption of Mt. Redoubt began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC). AVO is raising the aviation color code to Red and the alert level to Warning.  Initial height of the eruption cloud is estimated at less than 20,000 ft above sea level at present. Further reports will be issued as more information becomes available. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"An eruption of Mt. Redoubt, AK, began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC).","sentUtc":"2009-03-23","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-23T07:56:25-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-23T07:56:25-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-23T07:56:25-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090322\/0709Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A10\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the aviation color code to Orange and the alert level to Watch. Seismic activity has continued to increase and conditions may evolve rapidly culminating in an eruption within days to weeks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Likelihood of eruption has increased.","sentUtc":"2009-03-22","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-22T07:09:44-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-22T07:09:44-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-22T07:09:44-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090320\/2001Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A9\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is decreasing the Aviation Color Code to GREEN and the Volcanic Alert Level to NORMAL for Okmok volcano. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSeismic activity at Okmok has been at low to near background levels and satellite views show no activity over the past two weeks. AVO has received no reports of activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok volcano was in vigorous eruption from July 12 through mid-August, 2008. Energetic, intermittent ash emission from several vents within the caldera blanketed much of the northeast portion of Umnak Island with ash and dusted Unalaska\/Dutch Harbor with fine ash on several occasions. Rain-induced remobilization of debris from high on the volcano's flanks produced lahars down many drainages, forming new deltas at the coastline. A new, 200-300 m-high (660-980 ft) tephra cone developed inside the caldera at the primary eruption site. Since late August 2008, seismicity at Okmok has generally declined. The last confirmed ash emission at Okmok occurred on August 19, 2008.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOkmok volcano is a 6-mile-wide caldera that occupies most of the eastern end of Umnak Island, located 75 miles southwest of Unalaska\/Dutch Harbor in the eastern Aleutian Islands. Okmok has had several eruptions in historic time typically consisting of ash emissions occasionally to over 30,000 feet ASL but generally much lower; lava flows crossed the caldera floor in 1945 and 1958. Prior to 2008, the volcano last erupted in February 1997 producing lava flows and intermittent ash emissions over the course of several months.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe nearest settlement is Nikolski, population about 35, roughly 45 miles west of the volcano. A ranch caretaker family lives at Fort Glenn on the flank of the volcano about 6 miles east of the caldera rim.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Decreased seismic activity. No eruptive activity observed.","sentUtc":"2009-03-20","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2009-03-20T20:01:48-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-20T20:01:48-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-20T20:01:48-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090318\/1841Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A8\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is lowering the Aviation Color Code to \u003Cb\u003EYELLOW\u003C\/b\u003E and the Alert Level to Advisory for Mount Redoubt. Following the steam and ash emission on Sunday, March 15, seismicity has declined to levels prior to that event, and no additional emissions have been observed in web camera or satellite images.  The new magma beneath the volcano does not show signs of upward movement at this time. The volcano remains restless with abnormally high rates of gas emission and continued melting of the summit glacier. It is still possible for the current period of unrest to result in an eruption. However, the type of unrest we have observed so far could persist for many months to a year or more and not lead to an eruption. It is possible for conditions at the volcano to change rapidly, advancing from relatively low levels of activity to eruption in time periods as short as 24 hours or less.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to monitor Redoubt closely, but will no longer be formally staffed 24 hours per day. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"It does not appear at this time that a significant eruption is likely in the short term, but conditions may evolve rapidly.\r\n","sentUtc":"2009-03-18","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-18T18:41:36-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-18T18:41:36-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-18T18:41:36-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090315\/2350Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A7\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Redoubt has increased since about 13:00 AKDT and is continuing. An AVO observation flight reported that a steam and ash plume rose as high as 15,000 ft above sea level and produced minor ash fall on the upper south flank of Redoubt. Last reports are that the plume is now mainly steam.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBased on thsi change in activity AVO is increasing the level of concern and alert level to ORANGE\/WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIt does not appear at this time that a significant eruption is likely in the short term, but conditions may evolve rapidly. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO is monitoring the situation closely and the AVO operations center in Anchorage is now resuming 24 hour per day staffing.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Color code and alert levels to orange\/watch. Minor ash emission on upper flanks of volcano.","sentUtc":"2009-03-15","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-15T23:50:14-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-15T23:50:14-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-15T23:50:14-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090310\/1856Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A6\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe Alaska Volcano Observatory is lowering the Aviation Color Code to YELLOW and the Alert Level to Advisory for Mount Redoubt. The new magma beneath the volcano does not show any signs of upward movement at this time. The volcano remains restless with abnormally high gas emission rates and melting of the summit glacier still evident. It is still quite possible, though far from certain, that the current volcanic unrest at Mount Redoubt could result in an eruption.  Also, this unrest could persist for many months to a year or more and not lead to an eruption. During this unrest, it is possible for unrest at the volcano to change rapidly, advancing from relatively low levels to eruption in time periods as short as 24 hours or less. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAVO will continue to monitor Redoubt closely, but will no longer be formally staffed 24 hours per day.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Color code and alert levels lowered to yellow and advisory at Mt. Reodubt. Likelihood of an eruption within days is diminished. ","sentUtc":"2009-03-10","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-03-10T18:56:59-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-10T18:56:59-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-10T18:56:59-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090303\/0552Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            GREEN                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A5\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is increasing the Aviation Color Code to YELLOW and the Volcanic Alert Level to ADVISORY for Okmok volcano. Over the past 24 hours there have been short bursts of volcanic tremor at Okmok volcano. These bursts are occurring at a rate of one per hour on average. This is the first sign significant seismic activity at the volcano since the cessation of eruption in August 2008 and represents an increase above typical background activity. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThis increase in seismic activity does not necessarily indicate that an eruption will occur, or that an eruption is likely. Clouds currently obscure satellite views of the volcano. However there is no evidence that an eruption has occurred. The AVO Operations Room is currently being staffed 24\/7 due to unrest at Redoubt Volcano.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok volcano was in vigorous eruption from July 12 through mid-August, 2008. Energetic, intermittent ash emission from several vents within the caldera blanketed much of the northeast portion of Umnak Island with ash and dusted Unalaska\/Dutch Harbor with fine ash on several occasions. Rain-induced remobilization of debris from high on the volcano's flanks produced lahars down many drainages, forming new deltas at the coastline. A new, 200-300 m-high (660-980 ft) tephra cone developed inside the caldera at the primary eruption site. Since late August 2008, seismicity at Okmok has generally declined. The last confirmed ash emission at Okmok occurred on August 19, 2008.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOkmok volcano is a 6-mile-wide caldera that occupies most of the eastern end of Umnak Island, located 75 miles southwest of Unalaska\/Dutch Harbor in the eastern Aleutian Islands. Okmok has had several eruptions in historic time typically consisting of ash emissions occasionally to over 30,000 feet ASL but generally much lower; lava flows crossed the caldera floor in 1945 and 1958. Prior to 2008, the volcano last erupted in February 1997 producing lava flows and intermittent ash emissions over the course of several months.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe nearest settlement is Nikolski, population about 35, roughly 45 miles west of the volcano. A ranch caretaker family lives at Fort Glenn on the flank of the volcano about 6 miles east of the caldera rim. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased seismic activity. No eruptive activity observed.","sentUtc":"2009-03-03","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2009-03-03T05:52:43-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-03-03T05:52:43-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-03-03T05:52:43-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090212\/0111Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A4\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cbr \/\u003E\r\nThe Alaska Volcano Observatory is lowering the Aviation Color Code to GREEN and the Alert Code to NORMAL at Shishaldin volcano.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSeismic levels at Shishaldin volcano have decreased to background levels and have been at this level since late December 2008.  A very weak thermal anomaly was last detected on February 3, 2009.  Reports of steam issuing from the summit crater continue to be received although this is not anomalous activity at this volcano; steaming is typical.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A small summit crater typically emits a noticeable steam plume with occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, erupting atleast 28 times since 1775.  Most of Shishaldin's eruptions have consisted of small ash and steam plumes, although the most recent eruption in April-May 1999 produced an ash column that reached a height of 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nTom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cbr \/\u003E\r\nA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"volcano at background levels","sentUtc":"2009-02-12","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2009-02-12T01:11:29-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-02-12T01:11:29-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-02-12T01:11:29-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090125\/1109Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A3\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Redoubt volcano has increased markedly.  This activity could be precursory to an eruption, perhaps within hours to days.  There is no indication that the volcano is currently erupting.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,198 feet above sea level. Recent eruptions occurred in 1902, 1966-68, and 1989-90. The 1989-90 eruption produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 eruption affected international air traffic and resulted in minor or trace amounts of ash in the city of Anchorage and other nearby communities.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity has increased.  Likelihood of an eruption, perhaps within days increased.","sentUtc":"2009-01-25","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2009-01-25T11:09:57-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-01-25T11:09:57-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-01-25T11:09:57-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090107\/0028Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin  (VNUM #311360)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A2\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 54 deg 45 min W 163 deg 58 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E9373 ft (2857 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO has detected a significant thermal anomaly and a slight increase in earthquake activity at Shishaldin Volcano on Unimak Island in the eastern Aleutians.  Together, these observations indicate a departure from background conditions at Shishaldin. AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. There is no indication that an eruption is imminent or certain, although the potential for an eruption has increased.  AVO will continue to monitor the volcano closely.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EShishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 10 miles (16 km). A small summit crater typically emits a noticeable steam plume with occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, erupting atleast 28 times since 1775.  Most of Shishaldin's eruptions have consisted of small ash and steam plumes, although the most recent eruption in April-May 1999 produced an ash column that reached a height of 45,000 ft above sea level.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPeter Cervelli, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\npcervelli@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njdehn@gi.alaska.edu (907) 474-6499\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Increased potential for eruption.","sentUtc":"2009-01-07","obs":"avo","vName":"Shishaldin","vnum":"311360","noticeId":"DOI-USGS-AVO-2009-01-07T00:28:17-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-01-07T00:28:17-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-01-07T00:28:17-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20090102\/2151Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2009\/A1\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EA brief but explosive ash emission was detected in satellite images of Cleveland Volcano this morning. An ash plume was apparent in images obtained at 1645 UTC, 1809 UTC, 1812 UTC, and 1823 UTC. The ash plume reached an altitude of about 6 km (20,000 ft) drifted east-southeast about 240 km (150 mi) and dispersed over the North Pacific.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThis was a brief, short-lived, but explosive ash emission event from Cleveland Volcano and is typical of the type of events observed at this volcano in the past. Because the event was brief and the ash plume was relatively low level and dispersed rapidly AVO is not raising the color code or alert level. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\njdehn@gi.alaska.edu (907) 474-6499\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Short-lived ash emission to about 20,000 feet. Appears to have rapidly dispersed over the ocean E-SE of the volcano.","sentUtc":"2009-01-02","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2009-01-02T21:51:41-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2009-01-02T21:51:41-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2009-01-02T21:51:41-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20081224\/2222Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            UNASSIGNED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A34\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is raising the aviation color code to Yellow and the alert level to Advisory. Satellite images acquired last night show a persistent thermal anomaly near the summit of Cleveland volcano.  Such observations in the past have many times, but not always, preceded eruptive activity that has sent ash to altitudes of more than 20,000 ft above sea level and in 2001 as high as 39,000 ft. Eruptions in July 2008 produced ash plumes exceeding 25,000 ft.  Cleveland volcano is not seismically monitored; satellite images and pilot reports are the primary source of information.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. In February 2001 three explosive events occured at the volcano that produced ash clouds as high as 12 km (39,000 ft) above sea level. That eruption also produced a rubbly lava flow and hot avalanche that reached the sea. Minor explosive activity (cloud heights occasionally in excess of 20,000 ft. above sea level) has occurred periodically since 2001. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nwest@gi.alaska.edu (907) 474-6977\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The aviation color code is raised to Yellow and the alert level to Advisory for Cleveland volcano based on a persistent thermal anomaly seen in satelite data.","sentUtc":"2008-12-24","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2008-12-24T22:22:15-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-12-24T22:22:15-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-12-24T22:22:15-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20081119\/1854Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EGREEN\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A33\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past month, seismic activity at Okmok volcano has continued to decrease and is now at or very near pre-eruption levels. The last confirmed ash emission at Okmok occurred on August 19. The likelihood of a resumption of eruptive activity at Okmok has greatly diminished, therefore, we are reducing the Aviation Color Code to GREEN and Volcanic Alert Level to NORMAL for Okmok. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok volcano was in vigorous eruption from July 12 through mid-August, 2008. Energetic, intermittent ash emission from several vents within the caldera blanketed much of the northeast portion of Umnak Island with ash and dusted Unalaska\/Dutch Harbor with fine ash on several occasions. Rain-induced remobilization of debris from high on the volcano's flanks produced lahars down many drainages, forming new deltas at the coastline. A new, 200-300 m-high (660-980 ft) tephra cone developed inside the caldera at the primary eruption site. Since late August, seismicity at Okmok has generally declined. Occasional thermal anomalies visible in satellite images likely reflect the still-warm vent area, fumaroles, and\/or lake within the caldera. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nOkmok volcano is a 6-mile-wide caldera that occupies most of the eastern end of Umnak Island, located 75 miles southwest of Unalaska\/Dutch Harbor in the eastern Aleutian Islands. Okmok has had several eruptions in historic time typically consisting of ash emissions occasionally to over 30,000 feet ASL but generally much lower; lava flows crossed the caldera floor in 1945 and 1958. Prior to 2008, the volcano last erupted in February 1997 producing lava flows and intermittent ash emissions over the course of several months.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe nearest settlement is Nikolski, population about 35, roughly 45 miles west of the volcano. A ranch caretaker family lives at Fort Glenn on the flank of the volcano about 6 miles east of the caldera rim. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPeter Cervelli, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\npcervelli@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nMike West, Acting Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nwest@gi.alaska.edu (907) 474-6977\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No activity observed.","sentUtc":"2008-11-19","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-11-19T18:54:26-00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-11-19T18:54:26-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-11-19T18:54:26-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20081105\/2352Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ERedoubt  (VNUM #313030)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A32\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 60 deg 29 min W 152 deg 44 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tCook Inlet-South Central\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E10197 ft (3108 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past several months, AVO has detected potentially significant changes in gas emission and heat output from Redoubt Volcano. These changes are a departure from long-observed background activity, and therefore, AVO is raising the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY. There is no indication that an eruption is imminent or even certain. AVO is monitoring Redoubt closely and is making plans to install additional equipment on the volcano in the next several weeks.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EHeavily ice-mantled Redoubt volcano is located on the western side of Cook Inlet, 170 km (106 mi) southwest of Anchorage and 82 km (51 mi) west of Kenai, within Lake Clark National Park. Redoubt is a stratovolcano which rises to 10,198 feet above sea level. Recent eruptions occurred in 1902, 1966-68, and 1989-90. The 1989-90 eruption produced mudflows, or lahars, that traveled down the Drift River and partially flooded the Drift River Oil Terminal facility. The ash plumes produced by the 1989-90 eruption affected international air traffic and resulted in about 5 mm (0.2 inches) of ash in Kenai and trace amounts of ash in Anchorage and other nearby communities.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level increase to Advisory\/Yellow. AVO has detected potentially significant changes in gas and heat output from Redoubt Volcano. ","sentUtc":"2008-11-05","obs":"avo","vName":"Redoubt","vnum":"313030","noticeId":"DOI-USGS-AVO-2008-11-05T23:52:26-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-11-05T23:52:26-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-11-05T23:52:26-00:00","nvewsThreat":"Very High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20081031\/0041Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi  (VNUM #311130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A31\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 10 min W 175 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1030 ft (314 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past 2 months, seismic activity detected on regional networks in the vicinity of Kasatochi Volcano has steadily declined in intensity.  Overflights and satellite imagery show no indication of significant continuing unrest.  The likelihood of resumed eruptive activity at Kasatochi has greatly diminished, therefore, we are reducing the Aviation Color Code to UNASSIGNED and Volcanic Alert Level to UNASSIGNED.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EThe 2008 eruption occurred on August 7, 2008 after several days of felt earthquakes, observed rockfalls, and sulfur smell reported by USFWS biologists on the island.  At least three violent explosions sent ash and gas clouds as high as 60,000 ft above sea level.  Pyroclastic debris from the explosions blanketed the entire island and extended the shoreline seaward.  The summit crater widened and the lake vanished during the explosions; water is now re-filling the summit crater producing a brownish-green, warm, and probably acidic lake.  \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nContinuing earthquake activity measured on the Great Sitkin Island seismic network is dominated by regional tectonic events unrelated to Kasatochi.  Occasional thermal anomalies visible in satellite images are produced by the still-warm, fresh, volcanic deposits and crater lake.  It is important to note that AVO has no seismic instrumentation on Kasatochi Volcano.  Our reliance on adjacent networks on Great Sitkin and Atka Islands means small earthquakes that may occur prior to an eruption could go undetected.  Despite this, the steadily declining regional seismicity and no visual signs of accelerated unrest seen in satellite data or by flight crews or mariners suggests renewed eruption is unlikely.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nKasatochi Island is the summit of a predominantly submarine volcano composed of basaltic and andesitic lava flows and pyroclastic deposits. The volcanic cone has a circular central crater more than 1 km (3300 ft) across. Prior to the 2008 eruption, the high point of the crater rim was about 314 m (1030 ft) above sea level. \u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nHistorical eruptions at Kasatochi are poorly documented, although it is possible that eruptions attributed to nearby Konuiji volcano in 1760, 1827, and 1828 were actually eruptions of Kasatochi. Eruptive activity in 1899 may have destroyed the lake within the Kasatochi crater. Kasatochi is 83 km (52 mi) east of the community of Adak, and 90 km (55 mi) west of the community of Atka. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if\u003Cbr \/\u003E\r\nconditions change significantly or alert levels are modified. While a VAN\u003Cbr \/\u003E\r\nis in effect, regularly scheduled updates are posted at\u003Cbr \/\u003E\r\nhttp:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level decrease to Unassigned\/Unassigned. No new activity observed.","sentUtc":"2008-10-31","obs":"avo","vName":"Kasatochi","vnum":"311130","noticeId":"DOI-USGS-AVO-2008-10-31T00:41:08-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-10-31T00:41:08-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-10-31T00:41:08-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20081009\/2159Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EUNASSIGNED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A30\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EAVO is downgrading the Level of Concern Color Code for Cleveland Volcano to UNASSIGNED and the Alert Code to UNASSIGNED. Because Cleveland is not monitored with real-time seismic instrumentation, we do not assign it green or normal, because the absence of unrest cannot be confirmed.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe level of volcanic activity at Cleveland has declined significantly over the past month.  The last thermal anomaly observed in satellite imagery was on September 4 and clear web-camera views show a white snow-capped summit.  AVO has received no information to suggest that volcanic activity is continuing.   \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAVO monitors Cleveland Volcano with satellite imagery as weather allows. The lack of a real-time seismic network at Cleveland prevents AVO from tracking local earthquake activity related to volcanic unrest. Short-lived explosions of ash that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.\u003Cbr \/\u003E\r\n \u003Cbr \/\u003E\r\nCleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Alert level decrease to Unassigned\/Unassigned. The level of volcanic activity has declined significantly over the past month. Because Cleveland is not monitored with real-time seismic instrumentation, the absence of unrest cannot be confirmed.","sentUtc":"2008-10-09","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2008-10-09T21:59:36-00:00","colorCode":"UNASSIGNED","alertLevel":"UNASSIGNED","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-10-09T21:59:36-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-10-09T21:59:36-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080904\/2326Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi  (VNUM #311130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A29\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 10 min W 175 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1030 ft (314 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismic activity at Kasatochi volcano has declined significantly since the eruptions on August 7. No activity has been observed in satellite data since August 12. Therefore AVO is lowering the aviation color code from ORANGE to YELLOW and the Alert Level from Watch to Advisory.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi Volcano does not have a seismic network, thus AVO depends on networks on neighboring islands to monitor activity there. For this reason, low-level seismic activity may not be detected. Renewed volcanic activity is possible at any time with little or no warning.  \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ETom Murray, Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\ntlmurray@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity continues. ","sentUtc":"2008-09-04","obs":"avo","vName":"Kasatochi","vnum":"311130","noticeId":"DOI-USGS-AVO-2008-09-04T23:26:40-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-09-04T23:26:40-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-09-04T23:26:40-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080827\/2253Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A28\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESeismicity at Okmok Volcano has been steadily declining for the past eight days and significant ash plumes have not been observed since August 19.  Therefore AVO is lowering the aviation color code from Orange to Yellow and the Alert Level from Watch to Advisory.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EVisual observations of the caldera floor made on August 23 indicate that low level eruptive activity has also likely stopped.  It is possible for vigorous ash emissions to resume at any time. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAF\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907) 474-7131\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismicity at Okmok has been declining for 8 days. AVO is lowering the aviation color code from Orange to Yellow and the Alert Level from Watch to Advisory.","sentUtc":"2008-08-27","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-08-27T22:53:44-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-27T22:53:44-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-27T22:53:44-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080825\/2351Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A27\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite imagery obtained over the past few days has shown that eruptive activity at Cleveland volcano has significantly declined. AVO has received no additional information about activity at Cleveland.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EEruptive activity may resume at Cleveland volcano without warning.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"No recent thermal anomalies observed.","sentUtc":"2008-08-25","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2008-08-25T23:51:40-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-25T23:51:40-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-25T23:51:40-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080811\/2252Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A26\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThermal signatures as recorded from satellite indicate that Cleveland is still actively erupting.  The eruption seems to be predominately lava flows down its flanks.  Based on Cleveland currently being in eruption, the Aviation Color Code for Cleveland is increased from Yellow to Orange. The Alert Level remains at Watch. No ash plumes have been observed in satellite images since July 29.  \u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see http:\/\/www.avo.alaska.edu\/activity\/Cleveland.php for more information.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Cleveland continues to erupt lava. No indication of ash plumes.","sentUtc":"2008-08-11","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2008-08-11T22:52:30-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-11T22:52:30-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-11T22:52:30-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080810\/0704Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi  (VNUM #311130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A25\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 10 min W 175 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1030 ft (314 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe intense seismic activity associated with the Kasatochi eruption has declined and is no longer detected on the AVO seismic network on nearby Great Sitkin Island (about 40 km (25 mi) to the east). Vigorous ash emissions (up to 35,000 feet) have not been observed in satellite data for about 36 hours and AVO has received no pilot reports of ash clouds. Passing mariners report nothing unusual and no obvious indications that an explosive eruption is in progress. It appears that explosive eruptive activity has waned and AVO is lowering the aviation color code and alert level to ORANGE\/WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EBecause Kasatochi lacks a seismic network, it may be difficult to determine if or when ash emissions may resume and the volcano remains in a hazardous state. It is possible for explosive activity to resume with little or no warning.\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Seismic activity at Kasatochi can no longer be detected on nearby stations. No ash observed in satellite data and observations by passing boats indicate activity has declined.","sentUtc":"2008-08-10","obs":"avo","vName":"Kasatochi","vnum":"311130","noticeId":"DOI-USGS-AVO-2008-08-10T07:04:18-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-10T07:04:18-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-10T07:04:18-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080808\/0026Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi  (VNUM #311130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A24\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 10 min W 175 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1030 ft (314 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite data show an ash plume to an altitude of at least 35,000 ft. in the vicinity of Kasatochi Volcano 22:30 UTC (14:30 ADT). The plume is drifting to the south-southwest. Based on this information, we are elevating the color code to RED\/WARNING. This follows the recent increase in volcanic and earthquake activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAVO is monitoring this situation closely and has its operations room staffed 24 hours per day. More information about activity at Kasatochi Volcano can be found on the AVO web siteat www.avo.alaska.edu or by calling 907-786-7497.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nKasatochi Island represents the emergent summit of a predominantly submarine volcano composed of basaltic and andesitic flows and pyroclastics. Kasatochi has had no known historical eruptions; however, the volcano is mantled by a cover of young appearing pyroclastic debris indicative of relatively recent explosive activity. The island consists of a single, undissected cone with a central lake-filled crater about 0.75 km in diameter. A maximum height of 314 m is on the southern crater rim; elevation of the lake is less than about 60 m. Kasatochi Island is at the northern end of a 15-km-long, 6-km-wide submarine ridge that is normal to the trend of the Andreanof Islands. Water depths along the ridge are less than 90 m; if Kasatochi is constructed entirely on the ridge, the total height of the volcanic pile is only a little more than 400 m. Kasatochi is 83 km (52 mi) east of the community of Adak , and 90 km (55 mi) west of the community of Atka. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Eruption in progress. Large earthquakes and volcanic tremor are occurring in the vicinity of Kasatochi Volcano.  Kasatochi is an unmonitored volcano with no seismic network.","sentUtc":"2008-08-08","obs":"avo","vName":"Kasatochi","vnum":"311130","noticeId":"DOI-USGS-AVO-2008-08-08T00:26:35-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-08T00:26:35-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-08T00:26:35-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080807\/2257Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi  (VNUM #311130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            YELLOW                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A23\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 10 min W 175 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1030 ft (314 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EEarthquake activity in the vicinity of Kasatochi Volcano continues and is now being accompanied by periods of volcanic tremor. Volcanic tremor is often associated with fluid or magma migration. This morning, a US Fish and Wildlife Service field crew on Kasatochi Island reported periods of continuous ground shaking lasting 5-10 minutes, numerous rockfalls, and strong sulfur smell. These observations combined with the elevated seismicity suggest that an eruption is more likely and AVO is raising the color code and alert level to ORANGE\/WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EAVO is monitoring this situation closely and has its operations room staffed 24 hours per day. More information about activity at Kasatochi Volcano can be found on the AVO web siteat www.avo.alaska.edu or by calling 907-786-7497.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nKasatochi Island represents the emergent summit of a predominantly submarine volcano composed of basaltic and andesitic flows and pyroclastics. Kasatochi has had no known historical eruptions; however, the volcano is mantled by a cover of young appearing pyroclastic debris indicative of relatively recent explosive activity. The island consists of a single, undissected cone with a central lake-filled crater about 0.75 km in diameter. A maximum height of 314 m is on the southern crater rim; elevation of the lake is less than about 60 m. Kasatochi Island is at the northern end of a 15-km-long, 6-km-wide submarine ridge that is normal to the trend of the Andreanof Islands. Water depths along the ridge are less than 90 m; if Kasatochi is constructed entirely on the ridge, the total height of the volcanic pile is only a little more than 400 m.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Large earthquakes and volcanic tremor are occurring in the vicinity of Kasatochi Volcano. Potential for eruptive activity has increased. Kasatochi is an unmonitored volcano with no seismic network.","sentUtc":"2008-08-07","obs":"avo","vName":"Kasatochi","vnum":"311130","noticeId":"DOI-USGS-AVO-2008-08-07T22:57:34-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-07T22:57:34-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-07T22:57:34-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080807\/0417Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi  (VNUM #311130)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A22\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 10 min W 175 deg 30 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E1030 ft (314 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EOver the past 12 hours earthquake activity in the greater vicinity of Kasatochi volcano has increased rapidly. Earthquakes are poorly located, and it is possible that the earthquakes are associated with submarine activity. A US Fish and Wildlife Service field crew on Kasatochi Island has reported continual small tremors over the past several days. AVO is elevating the color code at Kasatochi to YELLOW due to the possibility that these earthquakes may result from magma movement toward the surface. The swarm-like character of the seismicity suggests that the activity may be related to the intrusion of magma which may or may not culminate in eruptive activity.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nEarthquake locations are very poor due to the lack of seismic monitoring in this area. There are no seismic instruments on Kasatochi Island and we are detecting the earthquakes on neighboring networks.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EKasatochi Island represents the emergent summit of a predominantly submarine volcano composed of basaltic and andesitic flows and pyroclastics. The island consists of a single, undissected cone with a central lake-filled crater about 0.75 km in diameter. A maximum height of 314 m is on the southern crater rim; elevation of the lake is less than about 60 m. Kasatochi Island is at the northern end of a 15-km-long, 6-km-wide submarine ridge that is normal to the trend of the Andreanof Islands. Water depths along the ridge are less than 90 m; if Kasatochi is constructed entirely on the ridge, the total height of the volcanic pile is only a little more than 400 m.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov (907) 786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly, alert levels are modified, or if new information becomes available. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Rapid increase in earthquake activity in the vicinity of Kasatochi Volcano. Potential for eruptive activity. Kasatochi is an unmonitored volcano with no seismic network.","sentUtc":"2008-08-07","obs":"avo","vName":"Kasatochi","vnum":"311130","noticeId":"DOI-USGS-AVO-2008-08-07T04:17:45-00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-07T04:17:45-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-07T04:17:45-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080806\/2016Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003ECleveland  (VNUM #311240)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EYELLOW\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A21\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 52 deg 49 min W 169 deg 56 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E5676 ft (1730 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EVolcanic unrest at Cleveland Volcano has decreased over the past week. The strong thermal anomaly observed in satellite views of the summit and flanks of the volcano, first observed July 21, has been decreasing in intensity. This indicates that the hot flows erupted onto the upper west, south, and southeast flanks are slowing or have stopped.  No ash plumes have been observed in satellite images since July 29.  Local observers have not noted plumes or ash fall from the volcano, though visibility is often limited.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe flanks of the volcano remain hazardous and occasional rockfalls and avalanches  or mudflows of hot debris may occur with little or no warning.  The alert level of watch remains in effect.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see http:\/\/www.avo.alaska.edu\/activity\/Cleveland.php for more information.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and had 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. This eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in October 2006.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Volcanic unrest at Cleveland Volcano appears to have declined. No significant ash emissions have occurred since July 29. ","sentUtc":"2008-08-06","obs":"avo","vName":"Cleveland","vnum":"311240","noticeId":"DOI-USGS-AVO-2008-08-06T20:16:48-00:00","colorCode":"YELLOW","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-06T20:16:48-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-06T20:16:48-00:00","nvewsThreat":"Moderate Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080803\/0035Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A20\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe episode of strong volcanic tremor at Okmok that peaked at about 4:30 AKDT (12:30 UTC) has declined in intensity. Occasional bursts of tremor, lasting from 2-5 minutes are still occurring but these do not appear to be associated with large ash emissions reaching above 20,000 feet.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSatellite and local observations indicate a lower level dark ash plume and a slightly higher steam plume.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nAlthough it remains possible for ash emissions to extend to 30,000 feet or higher, the overall trend of the seismicity suggests that lower level ash plumes will be more common.  \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Strong volcanic tremor at Okmok has declined although intermittent bursts of tremor are occurring intermittently. ","sentUtc":"2008-08-03","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-08-03T00:35:14-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-03T00:35:14-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-03T00:35:14-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080802\/1342Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A19\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EStrong volcanic tremor has returned to Okmok.  Tremor amplitudes began to climb at around 04:05 AKDT (12:05 UTC) and have remained high since. In the past, tremor of this amplitude usually indicates the potential for strong explosive activity with ash plumes exceeding 30,000 ft ASL.  No satellite data collected since the elevated tremor began are currently available.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EChris Waythomas, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\nchris@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nJon Dehn, Acting Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\ndehn@gi.alaska.edu (907) 474-6499\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Strong volcanic tremor resumed at Okmok beginning at about 04:05 AKDT (12:05 UTC).","sentUtc":"2008-08-02","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-08-02T13:42:41-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-08-02T13:42:41-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-08-02T13:42:41-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080730\/1934Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A18\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite images and recent pilot reports indicate the ash plume at Okmok has decreased to altitudes between 15,000 and 20,000 ft and is moving west from the volcano. Seismicity continues to alternate between periods of continuous and pulsating tremor. The pulses continue to be identified on seismometers on Makushin Volcano on Unalaska Island. Based on these observations AVO is lowering the aviation color code at Okmok volcano to ORANGE and the Alert Code to WATCH.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nStronger explosive activity could resume at any time with little or no warning.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see http:\/\/www.avo.alaska.edu\/activity\/Okmok.php for more information.\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907)978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite images and pilot reports indicate the ash plume at Okmok is at altitudes between 15,000 and 20,000 ft. Color CODE is now ORANGE. Alert Code is now WATCH","sentUtc":"2008-07-30","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-07-30T19:34:51-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-07-30T19:34:51-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-07-30T19:34:51-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080729\/0151Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A17\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003ESatellite images indicate ash may have reached 35,000 ft in a plume heading E to SE from the volcano. The intensity and duration of seismicity from the eruption at Okmok has changed from continuous tremor to a pulsating signal over the past 7.0 hours. These pulses are strong enough to be easily identified on seismometers on Makushin Volcano on Unalaska Island.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nStronger explosive activity could resume at any time with little or no warning.\u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see http:\/\/www.avo.alaska.edu\/activity\/Okmok.php for more information.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907)978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"Satellite images indicate ash may have reached 35,000 ft in a plume heading E to SE from the volcano.","sentUtc":"2008-07-29","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-07-29T01:51:58-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-07-29T01:51:58-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-07-29T01:51:58-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080726\/2001Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003EORANGE\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            RED                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A16\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe amplitude and duration of seismic activity has decreased over the last five hours. Satellite data indicate ash is rising to 20,000 to 22,000 feet. Based on these observations AVO is decreasing the aviation color code at Okmok volcano to ORANGE, and the alert level to WATCH. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see http:\/\/www.avo.alaska.edu\/activity\/Okmok.php for more information.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe nearest settlements are Nikolski, population about 35, roughly 45 miles west of the volcano, and a small number of people at the abandoned Fort Glenn military base 10 miles east of the volcano. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907)978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The intensity and duration of tremor from the eruption at Okmok has decreased over the last five hours.  ","sentUtc":"2008-07-26","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-07-26T20:01:10-00:00","colorCode":"ORANGE","alertLevel":"WATCH","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-07-26T20:01:10-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-07-26T20:01:10-00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Cstyle\u003E\n\ttd {\n\t\tpadding: .25em;\n\t}\n\u003C\/style\u003E\n\u003Ctable\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd colspan=\u00222\u0022\u003E\n\t\t\t(1) \u003Cb\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/b\u003E\n\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd width=\u0022250\u0022\u003E(2) Issued:\u003C\/td\u003E \n\t\t\u003Ctd valign=\u0022top\u0022\u003E(20080725\/2247Z)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(3) Volcano:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EOkmok  (VNUM #311290)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(4) Current Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cb\u003ERED\u003C\/b\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(5) Previous Color Code:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n                            ORANGE                    \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(6) Source:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\t\t\t\t\tAlaska Volcano Observatory\t\t\t\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(7) Notice Number:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E2008\/A15\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(8) Volcano Location:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EN 53 deg 23 min W 168 deg 9 min\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(9) Area:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\n\t\t\tAleutians\t\t\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(10) Summit Elevation:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E3520 ft (1073 m)\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(11) Volcanic Activity Summary:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003Cspan name=\u0022summary\u0022\u003EThe amplitude of seismic activity has increased in the past hour. Two pilots report ash to 40,000 feet. Satellite data confirm ash to at least 35,000. Based on these observations AVO is increasing the aviation color code at Okmok volcano to RED, and the alert level to WARNING. \u003C\/span\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n    \n        \t\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(12) Volcanic cloud height:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(13) Other volcanic cloud information:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(14) Remarks:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EPlease see http:\/\/www.avo.alaska.edu\/activity\/Okmok.php for more information.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThe nearest settlements are Nikolski, population about 35, roughly 45 miles west of the volcano, and a small number of people at the abandoned Fort Glenn military base 10 miles east of the volcano. \u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(15) Contacts:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EJohn Power, Acting Scientist-in-Charge, USGS\u003Cbr \/\u003E\r\njpower@usgs.gov, (907)786-7497\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nSteve McNutt, Coordinating Scientist, UAFGI\u003Cbr \/\u003E\r\nsteve@giseis.alaska.edu (907)978-5458\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\t\u003Ctr\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003E(16) Next Notice:\u003C\/td\u003E\n\t\t\u003Ctd valign=\u0022top\u0022\u003EA new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http:\/\/www.avo.alaska.edu\u003C\/td\u003E\n\t\u003C\/tr\u003E\n\u003C\/table\u003E","noticeSynopsis":"The intensity of eruption at Okmok has increased over the last hour.  ","sentUtc":"2008-07-25","obs":"avo","vName":"Okmok","vnum":"311290","noticeId":"DOI-USGS-AVO-2008-07-25T22:47:24-00:00","colorCode":"RED","alertLevel":"WARNING","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2008-07-25T22:47:24-00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2008-07-25T22:47:24-00:00","nvewsThreat":"High Threat"}]