Volcanic Eruptions at Kupreanof
Right now
The most recent data we hold from USGS arrived 17 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by USGS 104 days ago.
It is the 4th strongest of the 86 detections recorded within 20 km of this point since 12 May 2026. The last comparable one was on 29 May 2026. 13 more were recorded here in the fortnight before it.
What the source measured
USGS reported: AVO Kupreanof YELLOW/ADVISORY - Unrest continues with several earthquakes detected. Sulfur-dioxide emissions observed in satellite data.
USGS moved the alert level from UNASSIGNED to ADVISORY.
Nearby, since 12 May 2026
- September 8, 2026 · score 24 · 0.0 km
- September 7, 2026 · score 24 · 0.0 km
- September 6, 2026 · score 24 · 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 | Medium |
| Calamity Score (ours) | 20 / 100 |
| Our confidence | 62% |
| Coordinates | 56.0126, -159.7912 |
| Nearest City | Anchorage (813 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-30T18:00:57.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-AVO-2026-05-30T18:41:36+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 8 March 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.
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