Alaska earthquakes

M3.6 earthquake 169 km WSW of Nikolski, Alaska

A magnitude 3.6 earthquake struck 169 km WSW of Nikolski, Alaska on Sun, Dec 6, 2020, 11:43 PM HAST (09:43 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M4.4 174 km SW of Nikolski, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.6 (mb), minor
Local time: Sun, Dec 6, 2020, 11:43 PM HAST
UTC: 2020-12-07 09:43:32 UTC
Depth: 39.9 km (24.8 mi), shallow
Epicenter: 52.119° N, 170.963° 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 7.8 km horizontally, 12.6 km in depth
Magnitude uncertainty: ±0.16
Depth from: From location
Station coverage gap: 179°
Stations used: 44

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 9 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 us7000cpuw (also filed as ak020fprevjj). Read Mon, Sep 28, 2026, 10:02 PM UTC.