Alaska earthquakes

M2.8 earthquake 268 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 268 km SE of Chiniak, Alaska on Sun, Dec 19, 2021, 4:39 PM AKST (01:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.9 221 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: 2.8 (ml), micro
Local time: Sun, Dec 19, 2021, 4:39 PM AKST
UTC: 2021-12-20 01:39:56 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.970° N, 149.051° 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 11.2 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 279°, poorly surrounded by stations
Stations used: 21

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 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 us7000gfzy (also filed as ak021g9h2v5y). Read Wed, Sep 23, 2026, 4:51 PM UTC.