Alaska earthquakes

M2.9 earthquake 56 km N of Atka, Alaska

A magnitude 2.9 earthquake struck 56 km N of Atka, Alaska on Fri, Dec 3, 2021, 5:35 PM HAST (03:35 UTC), 179 km (111 mi) below the surface.

A larger quake followed: M4.2 75 km NE of Atka, 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: 2.9 (ml), micro
Local time: Fri, Dec 3, 2021, 5:35 PM HAST
UTC: 2021-12-04 03:35:15 UTC
Depth: 178.6 km (110.9 mi), intermediate-depth
Epicenter: 52.703° N, 174.181° 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 24.5 km horizontally, 26.2 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 179°
Stations used: 20

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 11 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000gabp (also filed as ak021fj1n60f). Read Sat, Sep 26, 2026, 11:04 PM UTC.