Alaska earthquakes

M3.1 earthquake 10 km NW of Atka, Alaska

A magnitude 3.1 earthquake struck 10 km NW of Atka, Alaska on Tue, Aug 3, 2021, 5:56 AM HADT (14:56 UTC), 210 km (131 mi) below the surface.

A larger quake followed: M3.9 48 km E of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Tue, Aug 3, 2021, 5:56 AM HADT
UTC: 2021-08-03 14:56:05 UTC
Depth: 210.4 km (130.7 mi), intermediate-depth
Epicenter: 52.254° N, 174.316° 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 17.5 km horizontally, 4.0 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 173°
Stations used: 24

Nearby

Within 100 km, magnitude 1.5 and up: 96 in the 60 days after this one and 71 in the 30 days before it.

After

The first 60 of 96.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f41v (also filed as ak0219vt7pfk). Read Thu, Sep 24, 2026, 7:06 AM UTC.