Alaska earthquakes

M2.7 earthquake 143 km S of Atka, Alaska

A magnitude 2.7 earthquake struck 143 km S of Atka, Alaska on Thu, Sep 22, 2022, 7:32 PM HADT (04:32 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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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, Sep 22, 2022, 7:32 PM HADT
UTC: 2022-09-23 04:32:21 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.930° N, 173.837° 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 7.0 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 239°, poorly surrounded by stations
Stations used: 9

Nearby

Within 100 km, magnitude 1.5 and up: 104 in the 60 days after this one and 23 in the 30 days before it.

After

The first 60 of 104.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ivmc (also filed as ak022c7ziyh3). Read Wed, Sep 30, 2026, 4:34 AM UTC.