Alaska earthquakes

M3.3 earthquake 267 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 267 km SE of Chiniak, Alaska on Fri, Dec 22, 2023, 4:50 PM AKST (01:50 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.3 205 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: 3.3 (ml), minor
Local time: Fri, Dec 22, 2023, 4:50 PM AKST
UTC: 2023-12-23 01:50:43 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.920° N, 149.173° 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 7.7 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 196°, poorly surrounded by stations
Stations used: 40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 20 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ll3t (also filed as ak023gefr539). Read Mon, Sep 28, 2026, 6:12 PM UTC.