Alaska earthquakes

M4.0 earthquake 30 km SSW of False Pass, Alaska

A magnitude 4.0 earthquake struck 30 km SSW of False Pass, Alaska on Mon, Jan 4, 2021, 11:44 AM AKST (20:44 UTC), 87 km (54 mi) below the surface.

A larger quake followed: M4.3 121 km ESE of Akutan, AK. This one was a foreshock.

King Cove 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: 4.0 (mb), light
Local time: Mon, Jan 4, 2021, 11:44 AM AKST
UTC: 2021-01-04 20:44:22 UTC
Depth: 87.5 km (54.4 mi), intermediate-depth
Epicenter: 54.583° N, 163.517° 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 5.8 km horizontally, 5.1 km in depth
Magnitude uncertainty: ±0.11
Depth from: From location
Station coverage gap: 150°
Stations used: 93

Nearest places

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

King Cove, AlaskaPopulation 1,009. Forecast93 kmSW

Nearby

Within 100 km, magnitude 1.5 and up: 76 in the 60 days after this one and 42 in the 30 days before it.

After

The first 60 of 76.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d5l2 (also filed as ak0216ybjba). Read Thu, Sep 24, 2026, 12:06 AM UTC.