Alaska earthquakes

M3.3 earthquake 72 km SE of Perryville, Alaska

A magnitude 3.3 earthquake struck 72 km SE of Perryville, Alaska on Mon, Aug 9, 2021, 9:47 AM AKDT (17:47 UTC), 19 km (11 mi) below the surface.

A larger quake followed: M6.9 125 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: Mon, Aug 9, 2021, 9:47 AM AKDT
UTC: 2021-08-09 17:47:36 UTC
Depth: 18.5 km (11.5 mi), shallow
Epicenter: 55.407° N, 158.425° 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: 80

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast131 kmE

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and at least 200 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 ak021a5s67tc (also filed as us6000f3my). Read Mon, Sep 28, 2026, 12:32 PM UTC.