Alaska earthquakes

M3.1 earthquake 33 km NNE of Adak, Alaska

A magnitude 3.1 earthquake struck 33 km NNE of Adak, Alaska on Thu, Nov 25, 2021, 2:29 PM HAST (00:29 UTC), 222 km (138 mi) below the surface.

A larger quake followed: M4.0 29 km SSW of Adak, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 3.1 (ml), minor
Local time: Thu, Nov 25, 2021, 2:29 PM HAST
UTC: 2021-11-26 00:29:16 UTC
Depth: 222.1 km (138.0 mi), intermediate-depth
Epicenter: 52.163° N, 176.482° 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 15.8 km horizontally, 4.7 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 159°
Stations used: 33

Nearby

Within 100 km, magnitude 1.5 and up: 126 in the 60 days after this one and 60 in the 30 days before it.

After

The first 60 of 126.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000gfwy (also filed as ak021f5ris28). Read Thu, Sep 24, 2026, 10:29 AM UTC.