Alaska earthquakes

M3.0 earthquake 75 km WSW of Atka, Alaska

A magnitude 3.0 earthquake struck 75 km WSW of Atka, Alaska on Tue, Apr 13, 2021, 8:54 PM HADT (05:54 UTC), 233 km (145 mi) below the surface.

A larger quake followed: M3.9 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Tue, Apr 13, 2021, 8:54 PM HADT
UTC: 2021-04-14 05:54:54 UTC
Depth: 232.8 km (144.7 mi), intermediate-depth
Epicenter: 52.001° N, 175.252° 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 21.0 km horizontally, 7.2 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 185°, poorly surrounded by stations
Stations used: 23

Nearby

Within 100 km, magnitude 1.5 and up: 77 in the 60 days after this one and 59 in the 30 days before it.

After

The first 60 of 77.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e1yf (also filed as ak0214s36yav). Read Sat, Sep 26, 2026, 10:03 AM UTC.