Volcanic Eruptions at Great Sitkin
Right now
The most recent data we hold from USGS arrived 12 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, <1 km from here.
Reported by USGS 107 days ago.
It is the 7th strongest of the 147 detections recorded within 20 km of this point since 7 March 2026. The last comparable one was on 20 May 2026. 13 more were recorded here in the fortnight before it.
What the source measured
USGS reported: AVO Great Sitkin ORANGE/WATCH - Slow eruption of lava within the summit crater continues.
USGS moved the alert level from ADVISORY to WATCH.
Nearby, since 7 March 2026
- September 4, 2026 · score 32 · 0.0 km
- September 3, 2026 · score 32 · 0.0 km
- September 2, 2026 · score 32 · 0.0 km
How we know
One source: USGS. Not yet confirmed by a second, independent source.
Our own score for this event is 20 out of 100, at 62 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Volcanic Eruptions |
| Severity | High |
| Calamity Score (ours) | 20 / 100 |
| Our confidence | 62% |
| Coordinates | 52.0765, -176.1109 |
| Nearest City | Anadyr (1453 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-21T18:15:02.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-AVO-2026-05-21T20:12:46+00:00 |
Score Breakdown
Technical Details
| VolcanoName | Great Sitkin |
| VolcanoId | 311120 |
| AlertLevel | WATCH |
| ColorCode | ORANGE |
| ObservatoryCode | avo |
| NvewsThreat | High Threat |
| PreviousAlertLevel | ADVISORY |
| PreviousColorCode | YELLOW |
Safety Information
During volcanic activity: follow evacuation orders from authorities. Volcanic ash can damage lungs — wear N95 masks or wet cloth over nose and mouth. Stay indoors during ashfall, close windows, and avoid driving. Lahars and pyroclastic flows can travel at high speeds — stay away from valleys and river channels near the volcano.
Series begins 8 March 2026 for live collection; the monthly chart also counts backfilled detections from 10 February 2024. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a volcano event with CalamityScore 20/100, at Great Sitkin, based on data from usgs_volcano. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.