Minor Earthquake ● Closed
M3.1 Earthquake — 20 km NE of Nikolaevsk, Alaska
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Magnitude 3.1 earthquake 20 km NE of Nikolaevsk, Alaska at a depth of 45.9 km, recorded by the U.S. Geological Survey.
Measurements
| Magnitude | M3.1 |
|---|---|
| Depth | 45.9 km |
| Coordinates | 59.9340, -151.3280 |
| Region | 20 km NE of Nikolaevsk, Alaska |
| Felt Reports | 1 |
| Tsunami Flag | 0 |
Measured by
Earthquake data courtesy of the U.S. Geological Survey
This is a scientific measurement of an event that has already happened. It is not a warning, and it does not tell you what to do.
Not rated by source. US Geological Survey does not publish a severity for this; the level shown is our own classification.
View original reportThis event as JSON · API and licence
Source updated 28 days ago (Sep 21, 2026 16:55 UTC) · we last heard from US Geological Survey 24 seconds ago
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What has changed
- Magnitude revised from M3.0 to M3.1 — Sep 21, 09:44 UTC by US Geological Survey
Figures published in the first minutes of an event are preliminary. A change here is the agency refining its own estimate, not a correction to this page.
General safety information
No authority has issued instructions for this event. The guidance below is general background reading, not a response to it.
Drop, Cover, and Hold On — what to do before, during and after an earthquake, plus emergency kit and family plan checklists.
Open Earthquake Safety Guide →Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.