Alaska earthquakes

M3.3 earthquake 188 km SE of Perryville, Alaska

A magnitude 3.3 earthquake struck 188 km SE of Perryville, Alaska on Sun, Aug 1, 2021, 5:42 AM AKDT (13:42 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M3.8 202 km SE of Perryville, Alaska. This one was a foreshock.

Sand Point forecast More in Alaska

Map

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

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The earthquake

Magnitude: 3.3 (ml), minor
Local time: Sun, Aug 1, 2021, 5:42 AM AKDT
UTC: 2021-08-01 13:42:47 UTC
Depth: 39.5 km (24.5 mi), shallow
Epicenter: 54.769° N, 156.942° 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: 83

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Sand Point, AlaskaPopulation 1,064. Forecast235 kmESE

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219shgnfh (also filed as us6000f18q). Read Tue, Sep 22, 2026, 10:24 PM UTC.