Alaska earthquakes

M2.7 earthquake 35 km S of Atka, Alaska

A magnitude 2.7 earthquake struck 35 km S of Atka, Alaska on Tue, Dec 15, 2020, 9:42 PM HAST (07:42 UTC), 192 km (119 mi) below the surface.

A larger quake followed: M4.9 91 km S of Atka, Alaska. This one was a foreshock.

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: Tue, Dec 15, 2020, 9:42 PM HAST
UTC: 2020-12-16 07:42:09 UTC
Depth: 191.6 km (119.0 mi), intermediate-depth
Epicenter: 51.879° N, 174.231° 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 28.5 km horizontally, 18.8 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 254°, poorly surrounded by stations
Stations used: 19

Nearby

Within 100 km, magnitude 1.5 and up: 85 in the 60 days after this one and 27 in the 30 days before it.

After

The first 60 of 85.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d206 (also filed as ak020g4m1vho). Read Sun, Sep 27, 2026, 12:40 AM UTC.