Volcanic Eruptions at Kupreanof
Right now
The most recent data we hold from USGS arrived 22 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Reported by USGS 112 days ago.
What the source measured
USGS reported: AVO Kupreanof YELLOW/ADVISORY - Unrest continues with earthquakes detected.
USGS moved the alert level from UNASSIGNED to ADVISORY.
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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.62/1 |
| Coordinates | 56.0126, -159.7912 |
| Nearest City | Anchorage (813 km) |
| Urban exposure index (PEI) | 0 within 100 km |
| Impact Tier | minor |
| Timestamp | 2026-05-25T17:02:31.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-AVO-2026-05-25T18:59:59+00:00 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: usgs_volcano. Occurrence: 2026-05-25T17:02:31.000Z.
First archived: 2026-05-26T20:25:47.574Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
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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