Alaska earthquakes

M2.9 earthquake 261 km ESE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 261 km ESE of Chiniak, Alaska on Thu, Sep 2, 2021, 2:42 PM AKDT (22:42 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.1 261 km SE of Chiniak, 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: 2.9 (ml), micro
Local time: Thu, Sep 2, 2021, 2:42 PM AKDT
UTC: 2021-09-02 22:42:18 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.542° N, 148.451° 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 5.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.05
Depth from: Operator assigned
Station coverage gap: 187°, poorly surrounded by stations
Stations used: 23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 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 us7000fc7p (also filed as ak021b9k0ndn). Read Wed, Sep 23, 2026, 9:30 PM UTC.