Alaska earthquakes

M3.1 earthquake 77 km W of Adak, Alaska

A magnitude 3.1 earthquake struck 77 km W of Adak, Alaska on Wed, Apr 29, 2020, 5:08 PM HADT (02:08 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.0 141 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Wed, Apr 29, 2020, 5:08 PM HADT
UTC: 2020-04-30 02:08:27 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.854° N, 177.759° 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 2.1 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 148°
Stations used: 49

Nearby

Within 100 km, magnitude 1.5 and up: 184 in the 60 days after this one and 79 in the 30 days before it.

After

The first 60 of 184.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009808 (also filed as av62162116, ak0205k59mt3). Read Tue, Sep 29, 2026, 7:51 PM UTC.