Alaska earthquakes

M3.1 earthquake 51 km SSE of Adak, Alaska

A magnitude 3.1 earthquake struck 51 km SSE of Adak, Alaska on Thu, Mar 30, 2023, 2:55 PM HADT (23:55 UTC), 35 km (22 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: Thu, Mar 30, 2023, 2:55 PM HADT
UTC: 2023-03-30 23:55:31 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.432° N, 176.404° 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 3.3 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 216°, poorly surrounded by stations
Stations used: 20

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 75 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000k2p2 (also filed as ak02343kupmk). Read Wed, Sep 30, 2026, 1:06 PM UTC.