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About AVO

Volcano Activity Notifications

About Color Codes & Alert Levels

In 2008, AVO switched to a new program to release reports. Reports prior to 2008 have been archived in a separate system. Due to the way these reports have been stored, archived reports cannot by searched by color code, alert level, and report type. If you would like to include archived reports in your search, check the box below.

Latest HANS Notifications

Sent Notice Type Volcanoes Notice ID/Link
December 19, 2025, 11:55 am Weekly Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-19T19:23:39+00:00
December 18, 2025, 10:00 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-18T18:58:11+00:00
December 17, 2025, 10:29 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-17T19:28:34+00:00
December 16, 2025, 10:58 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-16T19:51:44+00:00
December 15, 2025, 11:44 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-15T20:30:36+00:00
December 14, 2025, 1:44 pm Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-14T22:41:31+00:00
December 13, 2025, 11:44 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-13T20:13:55+00:00
December 13, 2025, 11:11 am Information Statement Shishaldin DOI-USGS-AVO-2025-12-13T19:59:31+00:00
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