Alaska earthquakes

M2.8 earthquake 240 km ESE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 240 km ESE of Chiniak, Alaska on Wed, Oct 11, 2023, 6:01 PM AKDT (02:01 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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Map

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

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Wed, Oct 11, 2023, 6:01 PM AKDT
UTC: 2023-10-12 02:01:54 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.677° N, 148.698° 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 4.4 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 262°, poorly surrounded by stations
Stations used: 26

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 8 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000l6pu (also filed as ak023d3dd41n). Read Tue, Sep 29, 2026, 12:25 PM UTC.