Alaska earthquakes

M2.5 earthquake 56 km SSE of Adak, Alaska

A magnitude 2.5 earthquake struck 56 km SSE of Adak, Alaska on Mon, May 25, 2020, 6:38 PM HADT (03:38 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.2 52 km WNW 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 25, 2020, 6:38 PM HADT
UTC: 2020-05-26 03:38:21 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.404° N, 176.344° 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 3.0 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 235°, poorly surrounded by stations
Stations used: 28

Nearby

Within 100 km, magnitude 1.5 and up: 177 in the 60 days after this one and 125 in the 30 days before it.

After

The first 60 of 177.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000a2e0 (also filed as ak0206r60ie8). Read Tue, Sep 29, 2026, 2:38 PM UTC.