[{"noticeTitle":"ALASKA VOLCANO OBSERVATORY DAILY UPDATE","noticeHtml":"\u003Cbr\/\u003E\n            \u003Ccenter\u003E\n                \u003Cp class=\u0022text-center\u0022\u003E\n                    \u003Cb\u003EALASKA VOLCANO OBSERVATORY DAILY UPDATE\u003C\/b\u003E\u003Cbr\/\u003E\n                    \u003Cb\u003EU.S. Geological Survey\u003C\/b\u003E\u003Cbr\/\u003E\n            \u003Cb\u003ESunday, October 4, 2026, 11:18 AM AKDT (Sunday, October 4, 2026, 19:18 UTC)\u003C\/b\u003E\n                \u003C\/p\u003E\n            \u003C\/center\u003E\n            \u003Cbr\/\u003E\n            \u003Cb\u003EGARELOI\u003C\/b\u003E (VNUM #311070)\u003Cbr\/\u003E51\u00b047'21\u0022 N 178\u00b047'46\u0022 W, Summit Elevation 5161 ft (1573 m)\u003Cbr\/\u003ECurrent Volcano Alert Level: ADVISORY\u003Cbr\/\u003ECurrent Aviation Color Code: YELLOW\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022synopsis\u0022\u003E\u003Cb\u003ESummary:\u003C\/b\u003E No above background activity observed over the past day.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003ENo additional signs of unrest have been detected following the short\u2011duration explosion on October 1. Over the past day, wind noise has limited detection of seismic and infrasound signals, and cloud cover has obscured satellite views of the volcano.\u003C\/p\u003E\u003Cp\u003EGareloi 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. This October 1 explosion 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\u003EMount Gareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cb\u003EGREAT SITKIN\u003C\/b\u003E (VNUM #311120)\u003Cbr\/\u003E52\u00b04'35\u0022 N 176\u00b06'39\u0022 W, Summit Elevation 5709 ft (1740 m)\u003Cbr\/\u003ECurrent Volcano Alert Level: WATCH\u003Cbr\/\u003ECurrent Aviation Color Code: ORANGE\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022synopsis\u0022\u003E\u003Cb\u003ESummary:\u003C\/b\u003E Slow eruption of lava within the summit crater continues.\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003ELava continues to erupt slowly within the summit crater of Great Sitkin Volcano. Minor earthquakes were detected in the past day. Cloud cover has obscured views of the volcano by satellite and webcam.\u003C\/p\u003E\u003Cp\u003EThe current eruption began in July 2021. Since then, lava flows have filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, webcams, and regional infrasound and lightning networks.\u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cp\u003ETo view monitoring data and other information about Great Sitkin Volcano: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/volcano\/great-sitkin\u0022\u003Ehttps:\/\/avo.alaska.edu\/volcano\/great-sitkin\u003C\/a\u003E\u003C\/p\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\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=\u0022synopsis\u0022\u003E\u003Cb\u003ESummary:\u003C\/b\u003E Low-level unrest continues.\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003ESlightly elevated seismic and infrasound activity continues, and minor sulfur dioxide emissions were detected in satellite data over the past day. Cloud cover has obscured views of the volcano by satellite and webcam.\u003C\/p\u003E\u003Cp\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 images to detect eruptions. \u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cp\u003ETo view monitoring data and other information about Shishaldin Volcano: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/volcano\/shishaldin\u0022\u003Ehttps:\/\/avo.alaska.edu\/volcano\/shishaldin\u003C\/a\u003E\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":"2026-10-04","obs":"avo","noticeId":"DOI-USGS-AVO-2026-10-04T19:06:29+00:00","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2026-10-04T19:06:29+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2026-10-04T19:06:29+00:00","obsAlertLevel":"WATCH","obsColorCode":"ORANGE","noticeHighestAlertLevel":"WATCH","noticeHighestColorCode":"ORANGE","noticeSections":[{"sectionHtml":"\u003Cbr\/\u003E\n            \u003Ccenter\u003E\n                \u003Cp class=\u0022text-center\u0022\u003E\n                    \u003Cb\u003EALASKA VOLCANO OBSERVATORY DAILY UPDATE\u003C\/b\u003E\u003Cbr\/\u003E\n                    \u003Cb\u003EU.S. Geological Survey\u003C\/b\u003E\u003Cbr\/\u003E\n            \u003Cb\u003ESunday, October 4, 2026, 11:18 AM AKDT (Sunday, October 4, 2026, 19:18 UTC)\u003C\/b\u003E\n                \u003C\/p\u003E\n            \u003C\/center\u003E\n            \u003Cbr\/\u003E\n            \u003Cb\u003EGARELOI\u003C\/b\u003E (VNUM #311070)\u003Cbr\/\u003E51\u00b047'21\u0022 N 178\u00b047'46\u0022 W, Summit Elevation 5161 ft (1573 m)\u003Cbr\/\u003ECurrent Volcano Alert Level: ADVISORY\u003Cbr\/\u003ECurrent Aviation Color Code: YELLOW\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022synopsis\u0022\u003E\u003Cb\u003ESummary:\u003C\/b\u003E No above background activity observed over the past day.\u003Cbr \/\u003E\r\n\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003ENo additional signs of unrest have been detected following the short\u2011duration explosion on October 1. Over the past day, wind noise has limited detection of seismic and infrasound signals, and cloud cover has obscured satellite views of the volcano.\u003C\/p\u003E\u003Cp\u003EGareloi 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. This October 1 explosion 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\u003EMount Gareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cb\u003EThis notice contains volcanoes not displayed here:\u003C\/b\u003E Great Sitkin (WATCH\/ORANGE), Shishaldin (ADVISORY\/YELLOW).\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","summary":"\u003Cp\u003ENo additional signs of unrest have been detected following the short\u2011duration explosion on October 1. Over the past day, wind noise has limited detection of seismic and infrasound signals, and cloud cover has obscured satellite views of the volcano.\u003C\/p\u003E\u003Cp\u003EGareloi 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. This October 1 explosion 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\u003EMount Gareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.\u003C\/p\u003E","synopsis":"AVO Gareloi YELLOW\/ADVISORY - No above background activity observed over the past day.","alertLevel":"ADVISORY","colorCode":"YELLOW","vName":"Gareloi","vnum":"311070","lat":51.7892,"lng":-178.796,"vUrl":"https:\/\/avo.alaska.edu\/activity\/Gareloi.php","vImage":"https:\/\/avo.alaska.edu\/images\/dbimages\/display\/1109362225_15_3.jpg","region":"Aleutians","sectionId":"DOI-USGS-AVO-2026-10-04T19:06:31+00:00"},{"sectionHtml":"\u003Cbr\/\u003E\n            \u003Ccenter\u003E\n                \u003Cp class=\u0022text-center\u0022\u003E\n                    \u003Cb\u003EALASKA VOLCANO OBSERVATORY DAILY UPDATE\u003C\/b\u003E\u003Cbr\/\u003E\n                    \u003Cb\u003EU.S. Geological Survey\u003C\/b\u003E\u003Cbr\/\u003E\n            \u003Cb\u003ESunday, October 4, 2026, 11:18 AM AKDT (Sunday, October 4, 2026, 19:18 UTC)\u003C\/b\u003E\n                \u003C\/p\u003E\n            \u003C\/center\u003E\n            \u003Cbr\/\u003E\n            \u003Cb\u003EGREAT SITKIN\u003C\/b\u003E (VNUM #311120)\u003Cbr\/\u003E52\u00b04'35\u0022 N 176\u00b06'39\u0022 W, Summit Elevation 5709 ft (1740 m)\u003Cbr\/\u003ECurrent Volcano Alert Level: WATCH\u003Cbr\/\u003ECurrent Aviation Color Code: ORANGE\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022synopsis\u0022\u003E\u003Cb\u003ESummary:\u003C\/b\u003E Slow eruption of lava within the summit crater continues.\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003ELava continues to erupt slowly within the summit crater of Great Sitkin Volcano. Minor earthquakes were detected in the past day. Cloud cover has obscured views of the volcano by satellite and webcam.\u003C\/p\u003E\u003Cp\u003EThe current eruption began in July 2021. Since then, lava flows have filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, webcams, and regional infrasound and lightning networks.\u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cp\u003ETo view monitoring data and other information about Great Sitkin Volcano: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/volcano\/great-sitkin\u0022\u003Ehttps:\/\/avo.alaska.edu\/volcano\/great-sitkin\u003C\/a\u003E\u003C\/p\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cb\u003EThis notice contains volcanoes not displayed here:\u003C\/b\u003E Gareloi (ADVISORY\/YELLOW), Shishaldin (ADVISORY\/YELLOW).\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","summary":"\u003Cp\u003ELava continues to erupt slowly within the summit crater of Great Sitkin Volcano. Minor earthquakes were detected in the past day. Cloud cover has obscured views of the volcano by satellite and webcam.\u003C\/p\u003E\u003Cp\u003EThe current eruption began in July 2021. Since then, lava flows have filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, webcams, and regional infrasound and lightning networks.\u003C\/p\u003E","synopsis":"AVO Great Sitkin ORANGE\/WATCH - Slow eruption of lava within the summit crater continues.","alertLevel":"WATCH","colorCode":"ORANGE","vName":"Great Sitkin","vnum":"311120","lat":52.0765,"lng":-176.1109,"vUrl":"https:\/\/www.avo.alaska.edu\/activity\/GreatSitkin.php","vImage":"https:\/\/avo.alaska.edu\/images\/dbimages\/display\/1102983616_16_3.jpg","region":"Aleutians","sectionId":"DOI-USGS-AVO-2026-10-04T19:06:29+00:00"},{"sectionHtml":"\u003Cbr\/\u003E\n            \u003Ccenter\u003E\n                \u003Cp class=\u0022text-center\u0022\u003E\n                    \u003Cb\u003EALASKA VOLCANO OBSERVATORY DAILY UPDATE\u003C\/b\u003E\u003Cbr\/\u003E\n                    \u003Cb\u003EU.S. Geological Survey\u003C\/b\u003E\u003Cbr\/\u003E\n            \u003Cb\u003ESunday, October 4, 2026, 11:18 AM AKDT (Sunday, October 4, 2026, 19:18 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=\u0022synopsis\u0022\u003E\u003Cb\u003ESummary:\u003C\/b\u003E Low-level unrest continues.\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cspan name=\u0022summary\u0022\u003E\u003Cp\u003ESlightly elevated seismic and infrasound activity continues, and minor sulfur dioxide emissions were detected in satellite data over the past day. Cloud cover has obscured views of the volcano by satellite and webcam.\u003C\/p\u003E\u003Cp\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 images to detect eruptions. \u003C\/p\u003E\u003C\/span\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cp\u003ETo view monitoring data and other information about Shishaldin Volcano: \u003Ca href=\u0022https:\/\/avo.alaska.edu\/volcano\/shishaldin\u0022\u003Ehttps:\/\/avo.alaska.edu\/volcano\/shishaldin\u003C\/a\u003E\u003C\/p\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cbr\/\u003E\u003Cb\u003EThis notice contains volcanoes not displayed here:\u003C\/b\u003E Gareloi (ADVISORY\/YELLOW), Great Sitkin (WATCH\/ORANGE).\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","summary":"\u003Cp\u003ESlightly elevated seismic and infrasound activity continues, and minor sulfur dioxide emissions were detected in satellite data over the past day. Cloud cover has obscured views of the volcano by satellite and webcam.\u003C\/p\u003E\u003Cp\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 images to detect eruptions. \u003C\/p\u003E","synopsis":"AVO Shishaldin YELLOW\/ADVISORY - Low-level unrest continues.","alertLevel":"ADVISORY","colorCode":"YELLOW","vName":"Shishaldin","vnum":"311360","lat":54.7554,"lng":-163.9711,"vUrl":"https:\/\/avo.alaska.edu\/activity\/Shishaldin.php","vImage":"https:\/\/avo.alaska.edu\/images\/dbimages\/display\/1108075524_30_3.jpg","region":"Aleutians","sectionId":"DOI-USGS-AVO-2026-10-04T19:06:30+00:00"}]}]