Alaska earthquakes

M4.0 earthquake 67 km SE of Unalaska, Alaska

A magnitude 4.0 earthquake struck 67 km SE of Unalaska, Alaska on Mon, Nov 23, 2020, 1:14 PM AKST (22:14 UTC), 35 km (22 mi) below the surface.

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, Nov 23, 2020, 1:14 PM AKST
UTC: 2020-11-23 22:14:29 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 53.448° N, 165.799° W
Region: Alaska
Felt reports: 3
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

3 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 161°
Stations used: 61

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast68 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 96 in the 60 days after this one and 67 in the 30 days before it.

After

The first 60 of 96.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000crtl (also filed as ak020f2tgfo5). Read Sun, Sep 27, 2026, 5:36 AM UTC.