Alaska earthquakes

M3.9 earthquake 256 km SE of Chiniak, Alaska

A magnitude 3.9 earthquake struck 256 km SE of Chiniak, Alaska on Sun, Dec 4, 2022, 9:42 PM AKST (06:42 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 214 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: 3.9 (mb), minor
Local time: Sun, Dec 4, 2022, 9:42 PM AKST
UTC: 2022-12-05 06:42:01 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.370° N, 148.732° W
Region: Alaska
Strongest shaking: I, not felt shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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 8.3 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 84°
Stations used: 85

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 16 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000j6zh (also filed as ak022fkr0968, ak022fkr0b05). Read Mon, Sep 28, 2026, 1:38 PM UTC.