Alaska earthquakes

M3.1 earthquake 226 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 226 km SE of Chiniak, Alaska on Sat, Mar 27, 2021, 10:54 AM AKDT (18:54 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.5 226 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: Sat, Mar 27, 2021, 10:54 AM AKDT
UTC: 2021-03-27 18:54:25 UTC
Depth: 20.2 km (12.5 mi), shallow
Epicenter: 56.050° N, 149.909° 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 9.0 km horizontally, 10.8 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 216°, poorly surrounded by stations
Stations used: 69

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 48 in the 60 days after this one and 16 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000e48s (also filed as ak0213yj9a8x). Read Sun, Sep 27, 2026, 8:35 AM UTC.