Alaska earthquakes

M2.7 earthquake 73 km SW of Atka, Alaska

A magnitude 2.7 earthquake struck 73 km SW of Atka, Alaska on Thu, Mar 4, 2021, 5:56 PM HAST (03:56 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.1 42 km SSE of Atka, Alaska. This one was a foreshock.

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: Thu, Mar 4, 2021, 5:56 PM HAST
UTC: 2021-03-05 03:56:54 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.696° N, 174.894° 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 5.4 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.15
Depth from: Operator assigned
Station coverage gap: 233°, poorly surrounded by stations
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 60 in the 30 days before it.

After

The first 60 of 135.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dwfk (also filed as ak0212xwimq7). Read Thu, Sep 24, 2026, 7:10 AM UTC.