Alaska earthquakes

M2.6 earthquake 181 km ESE of Chiniak, Alaska

A magnitude 2.6 earthquake struck 181 km ESE of Chiniak, Alaska on Mon, Sep 20, 2021, 4:09 AM AKDT (12:09 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.4 Gulf of Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 2.6 (ml), micro
Local time: Mon, Sep 20, 2021, 4:09 AM AKDT
UTC: 2021-09-20 12:09:09 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.914° N, 149.558° 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.

Location uncertainty: About 4.5 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 244°, poorly surrounded by stations
Stations used: 25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 12 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fv3r (also filed as ak021c35jf9r). Read Wed, Sep 23, 2026, 8:42 PM UTC.