Alaska earthquakes

M3.9 earthquake 88 km SE of King Cove, Alaska

A magnitude 3.9 earthquake struck 88 km SE of King Cove, Alaska on Wed, Mar 3, 2021, 3:34 PM AKST (00:34 UTC), 42 km (26 mi) below the surface.

A larger quake followed: M4.3 85 km SE of King Cove, 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: 3.9 (mb), minor
Local time: Wed, Mar 3, 2021, 3:34 PM AKST
UTC: 2021-03-04 00:34:59 UTC
Depth: 42.4 km (26.3 mi), shallow
Epicenter: 54.442° N, 161.461° 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 3.8 km horizontally, 9.4 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 188°, poorly surrounded by stations
Stations used: 45

Nearest places

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

King Cove, AlaskaPopulation 1,009. Forecast88 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 34 in the 30 days before it.

After

The first 60 of 165.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000dfb7 (also filed as ak0212w729z6). Read Wed, Sep 23, 2026, 9:09 PM UTC.