Alaska earthquakes

M2.5 earthquake 112 km S of Adak, Alaska

A magnitude 2.5 earthquake struck 112 km S of Adak, Alaska on Mon, May 11, 2020, 2:36 PM HADT (23:36 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.5 146 km SSE of Adak, 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: 2.5 (ml), micro
Local time: Mon, May 11, 2020, 2:36 PM HADT
UTC: 2020-05-11 23:36:00 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.880° N, 176.341° 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 3.5 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.15
Depth from: Operator assigned
Station coverage gap: 250°, poorly surrounded by stations
Stations used: 24

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 93 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 us70009p0e (also filed as ak02062ouiey). Read Tue, Sep 29, 2026, 5:38 PM UTC.