Alaska earthquakes

M4.2 earthquake 232 km SE of Chiniak, Alaska

A magnitude 4.2 earthquake struck 232 km SE of Chiniak, Alaska on Tue, Dec 3, 2019, 7:47 PM AKST (04:47 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.1 270 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: 4.2 (mb), light
Local time: Tue, Dec 3, 2019, 7:47 PM AKST
UTC: 2019-12-04 04:47:46 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.230° N, 149.412° 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 5.9 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 139°
Stations used: 130

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 47 in the 60 days after this one and 23 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 us60006lv6 (also filed as ak019fj2b7kl). Read Sun, Sep 27, 2026, 2:41 AM UTC.