Alaska earthquakes

M3.4 earthquake 262 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 262 km SE of Chiniak, Alaska on Fri, Dec 10, 2021, 11:27 PM AKST (08:27 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.9 222 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: 3.4 (ml), minor
Local time: Fri, Dec 10, 2021, 11:27 PM AKST
UTC: 2021-12-11 08:27:25 UTC
Depth: 7.8 km (4.8 mi), shallow
Epicenter: 55.909° N, 149.308° 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 9.5 km horizontally, 8.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 239°, poorly surrounded by stations
Stations used: 73

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 10 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000gbff (also filed as ak021fupc1ts). Read Wed, Sep 23, 2026, 6:26 PM UTC.