{"noticeTitle":"ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT","noticeHtml":"\u003Cbr\/\u003E\n            \u003Ccenter\u003E\n                \u003Cp class=\u0022text-center\u0022\u003E\n                    \u003Cb\u003EALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT\u003C\/b\u003E\u003Cbr\/\u003E\n                    \u003Cb\u003EU.S. Geological Survey\u003C\/b\u003E\u003Cbr\/\u003E\n            \u003Cb\u003ESaturday, December 13, 2025, 11:11 AM AKST (Saturday, December 13, 2025, 20:11 UTC)\u003C\/b\u003E\n                \u003C\/p\u003E\n            \u003C\/center\u003E\n            \u003Cbr\/\u003E\n            \u003Cb\u003ESHISHALDIN\u003C\/b\u003E (VNUM #311360)\u003Cbr\/\u003E54\u00b045'19\u0022 N 163\u00b058'16\u0022 W, Summit Elevation 9373 ft (2857 m)\u003Cbr\/\u003ECurrent Volcano Alert Level: ADVISORY\u003Cbr\/\u003ECurrent Aviation Color Code: YELLOW\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003EStrong northerly winds in the vicinity of Shishaldin Volcano have picked up loose volcanic ash and dust on the surface and are carrying it to the south-southwest. The National Weather Service has issued a SIGMET (\u003Ca href=\u0022https:\/\/www.weather.gov\/aawu\/sigmets\u0022\u003Ehttps:\/\/www.weather.gov\/aawu\/sigmets\u003C\/a\u003E) for this low-level event and suggests that the maximum cloud height is 9,000 ft (2.7 km) above sea level.\u003C\/p\u003E\u003Cp\u003EThis phenomenon is not the result of recent volcanic activity and occurs during times of high winds and dry snow-free conditions at Shishaldin and other volcanic areas of Alaska. No eruption is in progress. All of the volcanoes of the Katmai area (Griggs, Katmai, Novarupta, Mageik, Martin, Snowy and Trident) remain at Aviation Color Code GREEN and Alert Level NORMAL. Resuspended volcanic ash should be considered hazardous and could be damaging to aircraft and health.\u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cp\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\u003Cbr\/\u003E\u003Cbr\/\u003E               \n                \u003Cbr\/\u003E\u003Cbr\/\u003E\n                \u003Cb\u003ECONTACT INFORMATION:\u003C\/b\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\n                \u003Cp\u003EMatt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497\u003C\/p\u003E\u003Cp\u003EDavid Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460\u003C\/p\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cp\u003EContact AVO: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/contact\u0022\u003Ehttps:\/\/avo.alaska.edu\/contact\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003EThe Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.\u003C\/p\u003E","sentUtc":"2025-12-13","obs":"avo","noticeId":"DOI-USGS-AVO-2025-12-13T19:59:31+00:00","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2025-12-13T19:59:31+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2025-12-13T19:59:31+00:00"}