Alaska earthquakes

M3.1 earthquake 188 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 188 km SE of Chiniak, Alaska on Sun, Oct 31, 2021, 2:25 PM AKDT (22:25 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M3.8 232 km SE of Chiniak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Sun, Oct 31, 2021, 2:25 PM AKDT
UTC: 2021-10-31 22:25:49 UTC
Depth: 22.2 km (13.8 mi), shallow
Epicenter: 56.493° N, 149.942° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.9 km horizontally, 9.9 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 223°, poorly surrounded by stations
Stations used: 60

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 14 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fqc9 (also filed as ak021dz4mogm). Read Wed, Sep 23, 2026, 8:46 PM UTC.