Volcanic Eruption at Gareloi
Right now
The most recent data we hold from USGS arrived 5 hours ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by USGS today.
It is the only one we have recorded within 20 km of this point since 1 October 2026.
What the source measured
USGS reported: AVO Gareloi YELLOW/ADVISORY - A single brief explosion was detected in geophysical data at 07:27 AM AKDT (15:27 UTC) prompting a change in the Aviation Color Code/Volcano Alert Level to YELLOW/ADVISORY. No further signs of unrest have been detected.
USGS moved the alert level from NORMAL to ADVISORY.
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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Volcanic Eruption |
| Severity | Medium |
| Calamity Score (ours) | 18 / 100 |
| Legacy data-support index | 0.62/1 |
| Coordinates | 51.7892, -178.7960 |
| Nearest City | Anadyr (1454 km) |
| Urban exposure index (PEI) | 0 within 100 km |
| Impact Tier | minor |
| Timestamp | 2026-10-01T20:35:44.000Z |
| Source | https://volcanoes.usgs.gov/hans2/view/notice/DOI-USGS-AVO-2026-10-01T19:24:56+00:00 |
Physical priority index · v5. 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: 2026-10-01T20:35:44.000Z.
First archived: 2026-10-01T16:49:26.112Z. Material modification: 2026-10-01T21:00:25.977Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
1 retained revision changed source fields this page does not show; the index, severity and version stayed the same.
Score Breakdown
Technical Details
| VolcanoName | Gareloi |
| VolcanoId | 311070 |
| 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 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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