Alaska earthquakes

M2.6 earthquake 221 km SE of Chiniak, Alaska

A magnitude 2.6 earthquake struck 221 km SE of Chiniak, Alaska on Thu, Sep 21, 2023, 7:55 PM AKDT (03:55 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 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: Thu, Sep 21, 2023, 7:55 PM AKDT
UTC: 2023-09-22 03:55:47 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.437° N, 149.343° 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 9.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 272°, poorly surrounded by stations
Stations used: 16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 9 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ld0m (also filed as ak023c6bj5sc). Read Mon, Sep 28, 2026, 12:48 AM UTC.