Alaska earthquakes

M3.1 earthquake 80 km SE of Atka, Alaska

A magnitude 3.1 earthquake struck 80 km SE of Atka, Alaska on Wed, Aug 5, 2026, 3:38 AM HADT (12:38 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M4.5 76 km ESE of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Wed, Aug 5, 2026, 3:38 AM HADT
UTC: 2026-08-05 12:38:06 UTC
Depth: 17.9 km (11.1 mi), shallow
Epicenter: 51.596° N, 173.542° 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 5.5 km horizontally, 11.2 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 207°, poorly surrounded by stations
Stations used: 40

Nearby

Within 100 km, magnitude 1.5 and up: 102 since this one and 152 in the 30 days before it.

After

The first 60 of 102.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000tj2x (also filed as aka2026pjxzzo). Read Tue, Sep 29, 2026, 11:33 PM UTC.