Alaska earthquakes

M3.4 earthquake 253 km SE of Chignik, Alaska

A magnitude 3.4 earthquake struck 253 km SE of Chignik, Alaska on Sun, Aug 15, 2021, 5:46 PM AKDT (01:46 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M3.7 209 km SE of Perryville, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.4 (ml), minor
Local time: Sun, Aug 15, 2021, 5:46 PM AKDT
UTC: 2021-08-16 01:46:50 UTC
Depth: 25.7 km (16.0 mi), shallow
Epicenter: 54.470° N, 156.017° 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: 71

Nearby

Within 100 km, magnitude 1.5 and up: 49 in the 60 days after this one and 143 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 ak021ah3ej1x (also filed as us6000f6s9). Read Tue, Sep 22, 2026, 8:40 PM UTC.