Alaska earthquakes

M3.5 earthquake 246 km SSW of Akhiok, Alaska

A magnitude 3.5 earthquake struck 246 km SSW of Akhiok, Alaska on Thu, Aug 5, 2021, 1:42 PM AKDT (21:42 UTC), 12 km (7 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: 3.5 (ml), minor
Local time: Thu, Aug 5, 2021, 1:42 PM AKDT
UTC: 2021-08-05 21:42:55 UTC
Depth: 11.9 km (7.4 mi), shallow
Epicenter: 54.821° N, 155.276° 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: 79

Nearby

Within 100 km, magnitude 1.5 and up: 58 in the 60 days after this one and 105 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 ak0219z8dvca (also filed as us6000f2l9). Read Mon, Sep 28, 2026, 9:21 AM UTC.