Alaska earthquakes

M3.0 earthquake 191 km ESE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 191 km ESE of Chiniak, Alaska on Thu, Dec 23, 2021, 1:23 PM AKST (22:23 UTC), 10 km (6 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: 3.0 (ml), minor
Local time: Thu, Dec 23, 2021, 1:23 PM AKST
UTC: 2021-12-23 22:23:16 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.686° N, 149.606° 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 9.1 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.05
Depth from: Operator assigned
Station coverage gap: 278°, poorly surrounded by stations
Stations used: 20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 35 in the 60 days after this one and 18 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000gff4 (also filed as ak021ges3ehu). Read Wed, Sep 23, 2026, 3:59 PM UTC.