Alaska earthquakes

M4.1 earthquake 222 km SE of Chignik, Alaska

A magnitude 4.1 earthquake struck 222 km SE of Chignik, Alaska on Thu, Jul 29, 2021, 1:58 AM AKDT (09:58 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M5.6 181 km SE of Chignik, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 4.1 (ml), light
Local time: Thu, Jul 29, 2021, 1:58 AM AKDT
UTC: 2021-07-29 09:58:27 UTC
Depth: 6.8 km (4.2 mi), shallow
Epicenter: 55.084° N, 155.591° 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.

Stations used: 72

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 41 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219ngk9f0 (also filed as us6000f067). Read Fri, Sep 25, 2026, 2:06 PM UTC.