Alaska earthquakes

M4.0 earthquake 141 km SSE of Unalaska, Alaska

A magnitude 4.0 earthquake struck 141 km SSE of Unalaska, Alaska on Mon, Apr 11, 2022, 2:03 PM AKDT (22:03 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.5 117 km S of Unalaska, Alaska. This one was a foreshock.

Unalaska 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, Apr 11, 2022, 2:03 PM AKDT
UTC: 2022-04-11 22:03:25 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 52.772° N, 165.467° 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 6.1 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 187°, poorly surrounded by stations
Stations used: 71

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast142 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 48 in the 30 days before it.

After

The first 60 of 98.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000h1d8 (also filed as ak0224neeaes). Read Tue, Sep 29, 2026, 11:10 PM UTC.