Alaska earthquakes

M2.7 earthquake 29 km N of Adak, Alaska

A magnitude 2.7 earthquake struck 29 km N of Adak, Alaska on Thu, Feb 25, 2021, 5:58 AM HAST (15:58 UTC), 142 km (88 mi) below the surface.

A larger quake followed: M4.4 44 km SE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Thu, Feb 25, 2021, 5:58 AM HAST
UTC: 2021-02-25 15:58:27 UTC
Depth: 142.1 km (88.3 mi), intermediate-depth
Epicenter: 52.139° N, 176.627° 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 14.5 km horizontally, 10.0 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 168°
Stations used: 42

Nearby

Within 100 km, magnitude 1.5 and up: 120 in the 60 days after this one and 66 in the 30 days before it.

After

The first 60 of 120.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000djia (also filed as ak0212kvdfbt). Read Sat, Sep 26, 2026, 6:43 PM UTC.