Alaska earthquakes

M2.7 earthquake 253 km ESE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 253 km ESE of Chiniak, Alaska on Thu, Dec 31, 2020, 1:57 PM AKST (22:57 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.4 259 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: 2.7 (ml), micro
Local time: Thu, Dec 31, 2020, 1:57 PM AKST
UTC: 2020-12-31 22:57:28 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.495° N, 148.641° 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 5.0 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 257°, poorly surrounded by stations
Stations used: 23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 11 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d86t (also filed as ak020gto4zzg). Read Sat, Sep 26, 2026, 9:04 AM UTC.