Alaska earthquakes

M3.4 earthquake 244 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 244 km SE of Chiniak, Alaska on Sun, Dec 6, 2020, 8:13 AM AKST (17:13 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.5 245 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: 3.4 (ml), minor
Local time: Sun, Dec 6, 2020, 8:13 AM AKST
UTC: 2020-12-06 17:13:20 UTC
Depth: 20.5 km (12.7 mi), shallow
Epicenter: 56.190° N, 149.216° 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 7.2 km horizontally, 9.4 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 217°, poorly surrounded by stations
Stations used: 39

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 10 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000cnp5 (also filed as ak020fo8gjvx). Read Mon, Sep 28, 2026, 3:31 PM UTC.