Alaska earthquakes

M2.9 earthquake 241 km WSW of Adak, Alaska

A magnitude 2.9 earthquake struck 241 km WSW of Adak, Alaska on Sat, May 20, 2023, 8:19 PM GMT-12 (08:19 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.0 267 km W of Adak, 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: 2.9 (ml), micro
Local time: Sat, May 20, 2023, 8:19 PM GMT-12
UTC: 2023-05-21 08:19:22 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.161° N, 179.926° 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 3.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 223°, poorly surrounded by stations
Stations used: 22

Nearby

Within 100 km, magnitude 1.5 and up: 172 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 172.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000k41f (also filed as ak0236hbniq1). Read Wed, Sep 30, 2026, 3:35 PM UTC.