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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 Reports prior to 2008 have been archived in a separate system.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 31, 2025, 10:02 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-31T18:58:27+00:00
December 30, 2025, 3:41 pm Information Statement Katmai DOI-USGS-AVO-2025-12-31T00:40:39+00:00
December 30, 2025, 11:39 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-30T20:37:01+00:00
December 29, 2025, 11:32 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-29T20:29:05+00:00
December 28, 2025, 11:15 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-28T20:09:38+00:00
December 27, 2025, 11:13 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-27T19:22:09+00:00
December 26, 2025, 11:57 am Weekly Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-26T17:48:32+00:00
December 25, 2025, 11:55 am Daily Update Great Sitkin,Shishaldin DOI-USGS-AVO-2025-12-25T20:09:35+00:00
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