Severe Volcanic Activity ● Active
Great Sitkin — Volcano Alert Level WATCH
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
Slow eruption of lava within the summit crater continues.
Measurements
| Coordinates | 52.0765, -176.1109 |
|---|---|
| Region | Alaska Volcano Observatory |
| Alert Level | WATCH |
| Aviation Colour Code | ORANGE |
| Volcano Number | 311120 |
| Elevation M | 1740 |
| Observatory | Alaska Volcano Observatory |
| Elevated Since | 2021-05-27 |
| Severity Note | Severity is the US Geological Survey own Volcano Alert Level. |
Official source
Volcano alert levels courtesy of the U.S. Geological Survey Volcano Hazards Program
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by USGS Volcano Hazards Program.
View original reportThis event as JSON · API and licence
Source updated 11 minutes ago (Oct 19, 2026 18:47 UTC) · we last heard from USGS Volcano Hazards Program 11 minutes ago
On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.
Satellite view, before and after
The latest clear Sentinel-2 pass before this event and the earliest one after it.
27 Sep 2026, 21 days before this event. 18.2% cloud across the tile.
No clear pass yet. Sentinel-2 revisits every few days and cloud can hide a place for longer — this event is 1 day old, and a clear scene will appear here once one exists.
The white ring marks where the event was reported.
Each image is a preview of a whole Sentinel-2 tile — an area of roughly 110 by 110 km, where one pixel is about 320 metres — not a close-up of the event, which may be a small part of it. "Clear" means under 30% cloud across the entire tile, so the exact place that matters can still be hidden. These are pictures for context, not an assessment of damage.
Contains modified Copernicus Sentinel data 2026, found through the Earth Search catalogue (Element 84) and served from the AWS Open Data Sentinel-2 archive.
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by USGS Volcano Hazards Program and your local emergency services. The guidance below is background.
Ashfall protection, exclusion zones, lahars and pyroclastic flows, and evacuation planning near active volcanoes.
Open Volcano Safety Guide →Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.