Volcanic eruption at Kupreanof
Reported by USGS today.
It is the 77th strongest of the 77 detections recorded within 20 km of this point since 12 May 2026. The last comparable one was on 30 August 2026.
What the source measured
USGS reported: AVO Kupreanof YELLOW/ADVISORY - Low-level seismic activity continues.
USGS moved the alert level from UNASSIGNED to ADVISORY.
Nearby, since 12 May 2026
- August 30, 2026 · score 20 · 0.0 km
- August 29, 2026 · score 20 · 0.0 km
- August 28, 2026 · score 20 · 0.0 km
How we know
One source: USGS. Not yet confirmed by a second, independent source.
Our own score for this event is 18 out of 100, at 62 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Volcanic eruption |
| Severity | medium |
| Calamity Score (ours) | 18 / 100 |
| Our confidence | 62% |
| Coordinates | 56.0126, -159.7912 |
| Nearest City | Anchorage (813 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T16:58:05.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-AVO-2026-08-31T18:53:21+00:00 |
Score Breakdown
Technical Details
| VolcanoName | Kupreanof |
| VolcanoId | 312060 |
| AlertLevel | ADVISORY |
| ColorCode | YELLOW |
| ObservatoryCode | avo |
| NvewsThreat | Moderate Threat |
| PreviousAlertLevel | UNASSIGNED |
| PreviousColorCode | UNASSIGNED |
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 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a volcano event with CalamityScore 18/100, at Kupreanof, based on data from usgs_volcano. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.