Alaska earthquakes

M3.2 earthquake 45 km NNW of Atka, Alaska

A magnitude 3.2 earthquake struck 45 km NNW of Atka, Alaska on Tue, Sep 12, 2023, 2:23 PM HADT (23:23 UTC), 180 km (112 mi) below the surface.

A larger quake followed: M4.2 64 km E of Atka, 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: 3.2 (ml), minor
Local time: Tue, Sep 12, 2023, 2:23 PM HADT
UTC: 2023-09-12 23:23:16 UTC
Depth: 180.2 km (111.9 mi), intermediate-depth
Epicenter: 52.581° N, 174.438° 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 20.9 km horizontally, 12.7 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 248°, poorly surrounded by stations
Stations used: 17

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 89 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lb00 (also filed as ak023bq3vgle). Read Wed, Sep 30, 2026, 11:18 PM UTC.