Alaska earthquakes

M3.1 earthquake 67 km SW of Nanwalek, Alaska

A magnitude 3.1 earthquake struck 67 km SW of Nanwalek, Alaska on Sun, Sep 5, 2021, 8:42 AM AKDT (16:42 UTC), 70 km (44 mi) below the surface.

A larger quake followed: M3.5 60 km SE of Kokhanok, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Sun, Sep 5, 2021, 8:42 AM AKDT
UTC: 2021-09-05 16:42:03 UTC
Depth: 70.2 km (43.6 mi), intermediate-depth
Epicenter: 59.023° N, 152.908° 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: 204

Nearest places

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

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.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bef20cd (also filed as us7000f8ar). Read Wed, Sep 23, 2026, 5:13 AM UTC.