Alaska earthquakes

M2.5 earthquake 43 km S of Unalaska, Alaska

A magnitude 2.5 earthquake struck 43 km S of Unalaska, Alaska on Tue, Jan 26, 2021, 12:53 AM AKST (09:53 UTC), 63 km (39 mi) below the surface.

A larger quake followed: M4.0 68 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: Tue, Jan 26, 2021, 12:53 AM AKST
UTC: 2021-01-26 09:53:17 UTC
Depth: 63.0 km (39.2 mi), shallow
Epicenter: 53.483° N, 166.553° 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 9.2 km horizontally, 20.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 213°, poorly surrounded by stations
Stations used: 26

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast43 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 80 in the 60 days after this one and 39 in the 30 days before it.

After

The first 60 of 80.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dfns (also filed as ak021175nbfs). Read Wed, Sep 23, 2026, 10:14 PM UTC.