Alaska earthquakes

M4.5 earthquake 41 km ESE of Nikolski, Alaska

A magnitude 4.5 earthquake struck 41 km ESE of Nikolski, Alaska on Tue, Dec 1, 2020, 12:25 PM AKST (21:25 UTC), 39 km (24 mi) below the surface.

Unalaska forecast More in Alaska

Map

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

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The earthquake

Magnitude: 4.5 (mb), light
Local time: Tue, Dec 1, 2020, 12:25 PM AKST
UTC: 2020-12-01 21:25:15 UTC
Depth: 39.1 km (24.3 mi), shallow
Epicenter: 52.752° N, 168.328° 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 5.4 km horizontally, 5.5 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 137°
Stations used: 106

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast173 kmSW

Nearby

Within 100 km, magnitude 1.5 and up: 134 in the 60 days after this one and 75 in the 30 days before it.

After

The first 60 of 134.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000cltk (also filed as ak020fg18476). Read Tue, Sep 29, 2026, 7:31 AM UTC.