Alaska earthquakes

M4.0 earthquake 111 km SE of False Pass, Alaska

A magnitude 4.0 earthquake struck 111 km SE of False Pass, Alaska on Sat, Oct 2, 2021, 11:50 AM AKDT (19:50 UTC), 47 km (29 mi) below the surface.

A larger quake followed: M4.4 129 km S of False Pass, Alaska. 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: Sat, Oct 2, 2021, 11:50 AM AKDT
UTC: 2021-10-02 19:50:28 UTC
Depth: 47.4 km (29.4 mi), shallow
Epicenter: 54.040° N, 162.418° 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 7.3 km horizontally, 10.3 km in depth
Magnitude uncertainty: ±0.18
Depth from: From location
Station coverage gap: 194°, poorly surrounded by stations
Stations used: 58

Nearest places

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

King Cove, AlaskaPopulation 1,009. Forecast114 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 93 in the 60 days after this one and 49 in the 30 days before it.

After

The first 60 of 93.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fsmm (also filed as ak021cn4egda). Read Wed, Sep 23, 2026, 12:43 AM UTC.