Alaska earthquakes

M2.7 earthquake 129 km SSE of Unalaska, Alaska

A magnitude 2.7 earthquake struck 129 km SSE of Unalaska, Alaska on Wed, Dec 15, 2021, 12:35 AM AKST (09:35 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.1 99 km SSE of Akutan, Alaska. This one was a foreshock.

Unalaska forecast More in Alaska

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: Wed, Dec 15, 2021, 12:35 AM AKST
UTC: 2021-12-15 09:35:12 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 52.884° N, 165.519° 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 3.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.10
Depth from: Operator assigned
Station coverage gap: 231°, poorly surrounded by stations
Stations used: 27

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast129 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000gbhm (also filed as ak021g1c4lc5). Read Wed, Sep 23, 2026, 8:30 AM UTC.