Alaska earthquakes

M2.7 earthquake 209 km SE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 209 km SE of Chiniak, Alaska on Fri, Dec 17, 2021, 11:18 PM AKST (08:18 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.8 268 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: 2.7 (ml), micro
Local time: Fri, Dec 17, 2021, 11:18 PM AKST
UTC: 2021-12-18 08:18:49 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.100° N, 150.231° 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 9.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 260°, poorly surrounded by stations
Stations used: 38

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 12 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000gc38 (also filed as ak021g6a1lka). Read Wed, Sep 23, 2026, 7:12 PM UTC.