Alaska earthquakes

M2.5 earthquake 77 km S of Unalaska, Alaska

A magnitude 2.5 earthquake struck 77 km S of Unalaska, Alaska on Sat, Jan 22, 2022, 9:51 AM AKST (18:51 UTC), 30 km (19 mi) below the surface.

A larger quake followed: M5.1 82 km SSW of Unalaska, 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: 2.5 (ml), micro
Local time: Sat, Jan 22, 2022, 9:51 AM AKST
UTC: 2022-01-22 18:51:05 UTC
Depth: 30.2 km (18.8 mi), shallow
Epicenter: 53.184° N, 166.712° 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 5.1 km horizontally, 12.4 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 220°, poorly surrounded by stations
Stations used: 30

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast78 kmS

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 105 in the 30 days before it.

After

The first 60 of at least 199.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000glip (also filed as ak02210ouduq). Read Mon, Sep 28, 2026, 6:08 AM UTC.