Alaska earthquakes

M4.2 earthquake 108 km SE of King Cove, Alaska

A magnitude 4.2 earthquake struck 108 km SE of King Cove, Alaska on Wed, May 5, 2021, 4:19 PM AKDT (00:19 UTC), 28 km (17 mi) below the surface.

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: 4.2 (mwr), light
Local time: Wed, May 5, 2021, 4:19 PM AKDT
UTC: 2021-05-06 00:19:44 UTC
Depth: 28.1 km (17.4 mi), shallow
Epicenter: 54.282° N, 161.307° 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 4.2 Mwr
Nodal plane 1: Strike 65°, dip 63°, rake 102°
Nodal plane 2: Strike 219°, dip 29°, rake 67°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.3 km horizontally, 4.5 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 100°
Stations used: 174

Nearest places

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

King Cove, AlaskaPopulation 1,009. Forecast108 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 52 in the 60 days after this one and 117 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e0ht (also filed as ak0215sdtw3p). Read Sun, Sep 27, 2026, 8:02 AM UTC.