Alaska earthquakes

M2.5 earthquake 79 km W of Adak, Alaska

A magnitude 2.5 earthquake struck 79 km W of Adak, Alaska on Sun, May 31, 2020, 10:51 PM HADT (07:51 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.2 52 km WNW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.5 (ml), micro
Local time: Sun, May 31, 2020, 10:51 PM HADT
UTC: 2020-06-01 07:51:35 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.870° N, 177.788° 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 3.1 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 153°
Stations used: 47

Nearby

Within 100 km, magnitude 1.5 and up: 189 in the 60 days after this one and 86 in the 30 days before it.

After

The first 60 of 189.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000a5ce (also filed as av62174241, ak020715p51b). Read Wed, Sep 30, 2026, 12:56 AM UTC.