Alaska earthquakes

M3.6 earthquake 129 km SSW of Nikolski, Alaska

A magnitude 3.6 earthquake struck 129 km SSW of Nikolski, Alaska on Wed, Dec 23, 2020, 5:30 PM AKST (02:30 UTC), 10 km (6 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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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.6 (mb), minor
Local time
UTC
2020-12-24 02:30:47 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.822° N, 169.391° 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 3.7 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.17
Depth from
Operator assigned
Station coverage gap
142°
Stations used
51

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 16 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d2q3 (also filed as ak020ghrb0hn). Read Wed, Sep 30, 2026, 12:31 AM UTC.