Alaska earthquakes

M4.2 earthquake 101 km SSW of False Pass, Alaska

A magnitude 4.2 earthquake struck 101 km SSW of False Pass, Alaska on Mon, Aug 31, 2020, 5:25 PM AKDT (01:25 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M4.3 71 km SE of Akutan, Alaska. This one was a foreshock.

Akutan 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 (mb), light
Local time: Mon, Aug 31, 2020, 5:25 PM AKDT
UTC: 2020-09-01 01:25:27 UTC
Depth: 22.2 km (13.8 mi), shallow
Epicenter: 54.067° N, 164.202° 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 5.1 km horizontally, 6.6 km in depth
Magnitude uncertainty: ±0.16
Depth from: From location
Station coverage gap: 164°
Stations used: 62

Nearest places

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

Akutan, AlaskaPopulation 1,040. Forecast103 kmE

Nearby

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

After

The first 60 of 100.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bfiu (also filed as ak020b97evj0). Read Sat, Sep 26, 2026, 5:36 PM UTC.