Alaska earthquakes

M3.1 earthquake 28 km SSW of Adak, Alaska

A magnitude 3.1 earthquake struck 28 km SSW of Adak, Alaska on Tue, May 16, 2023, 6:34 PM HADT (03:34 UTC), 52 km (33 mi) below the surface.

A larger quake followed: M4.6 15 km SE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Tue, May 16, 2023, 6:34 PM HADT
UTC: 2023-05-17 03:34:52 UTC
Depth: 52.4 km (32.6 mi), shallow
Epicenter: 51.624° N, 176.717° 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 7.4 km horizontally, 12.4 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 200°, poorly surrounded by stations
Stations used: 22

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 155 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kde6 (also filed as ak0236amm8x1). Read Wed, Sep 30, 2026, 1:07 PM UTC.