Alaska earthquakes

M2.9 earthquake 68 km E of Atka, Alaska

A magnitude 2.9 earthquake struck 68 km E of Atka, Alaska on Sat, Apr 24, 2021, 8:38 PM HADT (05:38 UTC), 223 km (139 mi) below the surface.

A larger quake followed: M5.1 75 km SE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.9 (ml), micro
Local time: Sat, Apr 24, 2021, 8:38 PM HADT
UTC: 2021-04-25 05:38:06 UTC
Depth: 223.1 km (138.6 mi), intermediate-depth
Epicenter: 52.313° N, 173.220° 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 25.4 km horizontally, 4.5 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 182°, poorly surrounded by stations
Stations used: 22

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 36 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 us7000e55p (also filed as ak0215aa09nd). Read Thu, Sep 24, 2026, 10:20 AM UTC.