Alaska earthquakes

M2.9 earthquake 58 km E of Adak, Alaska

A magnitude 2.9 earthquake struck 58 km E of Adak, Alaska on Wed, Sep 1, 2021, 7:01 PM HADT (04:01 UTC), 156 km (97 mi) below the surface.

A larger quake followed: M3.3 67 km ESE of Adak, 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: 2.9 (ml), micro
Local time: Wed, Sep 1, 2021, 7:01 PM HADT
UTC: 2021-09-02 04:01:24 UTC
Depth: 155.9 km (96.9 mi), intermediate-depth
Epicenter: 51.975° N, 175.798° 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 12.2 km horizontally, 5.2 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 180°
Stations used: 44

Nearby

Within 100 km, magnitude 1.5 and up: 107 in the 60 days after this one and 78 in the 30 days before it.

After

The first 60 of 107.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fc6x (also filed as ak021b9920z5). Read Thu, Sep 24, 2026, 7:09 AM UTC.