Alaska earthquakes

M2.9 earthquake 26 km WNW of Atka, Alaska

A magnitude 2.9 earthquake struck 26 km WNW of Atka, Alaska on Mon, Oct 12, 2020, 12:57 AM HADT (09:57 UTC), 195 km (121 mi) below the surface.

A larger quake followed: M3.6 69 km SSW of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.9 (ml), micro
Local time: Mon, Oct 12, 2020, 12:57 AM HADT
UTC: 2020-10-12 09:57:55 UTC
Depth: 195.4 km (121.4 mi), intermediate-depth
Epicenter: 52.325° N, 174.533° 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 11.0 km horizontally, 7.5 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 151°
Stations used: 22

Nearby

Within 100 km, magnitude 1.5 and up: 51 in the 60 days after this one and 59 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 us6000cd6y (also filed as ak020d55ehyp). Read Mon, Sep 28, 2026, 5:05 AM UTC.