Alaska earthquakes

M3.2 earthquake 233 km SE of Chiniak, Alaska

A magnitude 3.2 earthquake struck 233 km SE of Chiniak, Alaska on Sat, Aug 28, 2021, 1:52 PM AKDT (21:52 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.4 249 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: 3.2 (ml), minor
Local time: Sat, Aug 28, 2021, 1:52 PM AKDT
UTC: 2021-08-28 21:52:42 UTC
Depth: 10.4 km (6.5 mi), shallow
Epicenter: 56.004° N, 149.815° 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 8.8 km horizontally, 8.6 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 210°, 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: 27 in the 60 days after this one and 11 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f5b3 (also filed as ak021b19sth2). Read Wed, Sep 23, 2026, 9:30 PM UTC.