Alaska earthquakes

M3.6 earthquake 66 km E of Atka, Alaska

A magnitude 3.6 earthquake struck 66 km E of Atka, Alaska on Tue, Dec 22, 2020, 4:56 PM HAST (02:56 UTC), 102 km (63 mi) below the surface.

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The earthquake

Magnitude: 3.6 (ml), minor
Local time: Tue, Dec 22, 2020, 4:56 PM HAST
UTC: 2020-12-23 02:56:01 UTC
Depth: 101.7 km (63.2 mi), intermediate-depth
Epicenter: 52.178° N, 173.235° 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 13.0 km horizontally, 7.4 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 189°, poorly surrounded by stations
Stations used: 24

Nearby

Within 100 km, magnitude 1.5 and up: 50 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 us6000d23e (also filed as ak020gg3x0dj). Read Sat, Sep 26, 2026, 1:12 PM UTC.