Alaska earthquakes

M3.5 earthquake 63 km NNW of Dutch Harbor, Alaska

A magnitude 3.5 earthquake struck 63 km NNW of Dutch Harbor, Alaska on Wed, Dec 8, 2021, 2:02 PM AKST (23:02 UTC), 183 km (114 mi) below the surface.

A larger quake followed: M3.7 29 km E of Unalaska, Alaska. This one was a foreshock.

Dutch Harbor 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: 3.5 (ml), minor
Local time: Wed, Dec 8, 2021, 2:02 PM AKST
UTC: 2021-12-08 23:02:48 UTC
Depth: 183.4 km (114.0 mi), intermediate-depth
Epicenter: 54.449° N, 166.741° 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 16.2 km horizontally, 11.6 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 185°, poorly surrounded by stations
Stations used: 40

Nearest places

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

Dutch Harbor, AlaskaPopulation 4,376. Forecast64 kmNNW

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 10 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000gap3 (also filed as ak021fpzi7f4). Read Wed, Sep 23, 2026, 4:35 AM UTC.