Moderate Earthquake ● Closed
M5.2 Earthquake — 152 km WSW of Adak, Alaska
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Magnitude 5.2 earthquake 152 km WSW of Adak, Alaska at a depth of 19.0 km, recorded by the U.S. Geological Survey.
Measurements
| Magnitude | M5.2 |
|---|---|
| Depth | 19.0 km |
| Coordinates | 51.1570, -178.5020 |
| Region | 152 km WSW of Adak, Alaska |
| Tsunami Flag | 1 |
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 reportAlso reported by: EMSC
This event as JSON · API and licence
Source updated 38 days ago (Sep 11, 2026 10:51 UTC) · we last heard from US Geological Survey 2 seconds ago
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What USGS has published since this earthquake
Aftershock forecast
USGS gives less than a 1% chance of at least one aftershock of magnitude 5 or larger in the week to 23 Oct 2026, less than a 1% chance of magnitude 6 or larger, and less than a 1% chance of magnitude 7 or larger.
USGS puts less than a 1% chance on an earthquake larger than this magnitude 5.1 following in the week to 23 Oct 2026.
Since the mainshock USGS has recorded 5 aftershocks of magnitude 3 or larger.
| Chance of at least one aftershock in | M5+ | M6+ | M7+ |
|---|---|---|---|
| the week to 23 Oct 2026 | <1% | <1% | <1% |
| the month to 15 Nov 2026 | <1% | <1% | <1% |
| the year to 16 Oct 2027 | 3% | <1% | <1% |
USGS forecast issued 16 Oct 2026 10:47 UTC, generated automatically. A forecast gives chances, not times: it cannot say when or where an aftershock will strike.
How far the shaking reached
- Moderate shaking (intensity V) or more reached about 20 km from the epicentre at its farthest.
- Light shaking (intensity IV) or more reached about 45 km from the epicentre at its farthest.
USGS ShakeMap, automatic: an estimate built from seismic stations, felt reports and a model where there are neither. Distances are in a straight line from USGS's epicentre; the lines on the map above are USGS's contours, simplified. Shaking varies with the ground, so a place inside a line may have felt less or more.
From the U.S. Geological Survey. The USGS event page has the maps and everything USGS has published for this earthquake.
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.