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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 Reports prior to 2008 have been archived in a separate system.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
May 31, 2025, 10:50 am Daily Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-31T18:45:17+00:00
May 30, 2025, 12:46 pm Weekly Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-30T18:32:28+00:00
May 29, 2025, 12:10 pm Daily Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-29T20:05:12+00:00
May 28, 2025, 12:17 pm Information Statement Spurr DOI-USGS-AVO-2025-05-28T15:46:23+00:00
May 28, 2025, 12:13 pm Daily Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-28T20:05:00+00:00
May 27, 2025, 11:06 am Daily Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-27T19:00:04+00:00
May 26, 2025, 9:52 am Daily Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-26T17:51:27+00:00
May 25, 2025, 12:14 pm Daily Update Great Sitkin,Spurr DOI-USGS-AVO-2025-05-25T20:10:18+00:00