Alaska earthquakes

M1.7 earthquake 80 km W of Adak, Alaska

A magnitude 1.7 earthquake struck 80 km W of Adak, Alaska on Tue, Feb 25, 2020, 10:42 PM HAST (08:42 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M5.0 71 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: 1.7 (ml), micro
Local time: Tue, Feb 25, 2020, 10:42 PM HAST
UTC: 2020-02-26 08:42:40 UTC
Depth: 6.2 km (3.9 mi), shallow
Epicenter: 51.856° N, 177.797° 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.

Stations used: 25

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of 190.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0202menc8t (also filed as av62139831). Read Wed, Sep 30, 2026, 8:39 PM UTC.