Alaska earthquakes

M3.0 earthquake 74 km NW of Atka, Alaska

A magnitude 3.0 earthquake struck 74 km NW of Atka, Alaska on Fri, Jul 30, 2021, 1:44 AM HADT (10:44 UTC), 206 km (128 mi) below the surface.

A larger quake followed: M3.1 10 km NW of Atka, 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: Fri, Jul 30, 2021, 1:44 AM HADT
UTC: 2021-07-30 10:44:17 UTC
Depth: 205.8 km (127.8 mi), intermediate-depth
Epicenter: 52.694° N, 174.935° 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 12.8 km horizontally, 11.5 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 182°, poorly surrounded by stations
Stations used: 19

Nearby

Within 100 km, magnitude 1.5 and up: 61 in the 60 days after this one and 43 in the 30 days before it.

After

The first 60 of 61.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f55j (also filed as ak0219p4m1c1). Read Thu, Sep 24, 2026, 8:41 AM UTC.