Volcanic eruption near Anchorage
Reported by USGS yesterday.
No stronger detection stands among the 139 recorded within 20 km of this point since 7 March 2026 — 137 others scored the same. The last comparable one was on 27 August 2026.
What the source measured
USGS reported: AVO Shishaldin YELLOW/ADVISORY - Unrest continues with small earthquakes, tremor, infrasound signals and gas emissions detected.
Nearby, since 7 March 2026
- August 29, 2026 · score 20 · 0.0 km
- August 27, 2026 · score 20 · 0.0 km
- August 26, 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 20 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) | 20 / 100 |
| Our confidence | 62% |
| Coordinates | 54.7554, -163.9711 |
| Nearest City | Anchorage (1094 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-28T16:37:48.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-AVO-2026-08-28T16:59:04+00:00 |
Score Breakdown
Technical Details
| VolcanoName | Shishaldin |
| VolcanoId | 311360 |
| AlertLevel | ADVISORY |
| ColorCode | YELLOW |
| ObservatoryCode | avo |
| NvewsThreat | High Threat |
| PreviousAlertLevel | NORMAL |
| PreviousColorCode | GREEN |
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 20/100, near Anchorage, based on data from usgs_volcano. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.