Alaska earthquakes

M4.3 earthquake 85 km SE of King Cove, Alaska

A magnitude 4.3 earthquake struck 85 km SE of King Cove, Alaska on Wed, Mar 3, 2021, 3:38 PM AKST (00:38 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M4.6 32 km S of Sand Point, 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: 4.3 (mb), light
Local time: Wed, Mar 3, 2021, 3:38 PM AKST
UTC: 2021-03-04 00:38:09 UTC
Depth: 40.4 km (25.1 mi), shallow
Epicenter: 54.440° N, 161.531° 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 4.4 km horizontally, 6.3 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 157°
Stations used: 165

Nearest places

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

King Cove, AlaskaPopulation 1,009. Forecast85 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 143 in the 60 days after this one and 56 in the 30 days before it.

After

The first 60 of 143.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000dfba (also filed as ak0212w730r7). Read Thu, Sep 24, 2026, 8:46 AM UTC.