Alaska earthquakes

M3.1 earthquake 28 km ESE of Atka, Alaska

A magnitude 3.1 earthquake struck 28 km ESE of Atka, Alaska on Tue, Feb 2, 2021, 10:29 PM HAST (08:29 UTC), 95 km (59 mi) below the surface.

A larger quake followed: M4.7 37 km SSW of Atka, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 3.1 (ml), minor
Local time: Tue, Feb 2, 2021, 10:29 PM HAST
UTC: 2021-02-03 08:29:55 UTC
Depth: 95.3 km (59.2 mi), intermediate-depth
Epicenter: 52.057° N, 173.852° 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 15.4 km horizontally, 26.9 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 287°, poorly surrounded by stations
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 74 in the 60 days after this one and 38 in the 30 days before it.

After

The first 60 of 74.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dhw8 (also filed as ak0211kd7lt0). Read Thu, Sep 24, 2026, 10:21 AM UTC.