Alaska earthquakes

M3.2 earthquake 40 km WNW of Atka, Alaska

A magnitude 3.2 earthquake struck 40 km WNW of Atka, Alaska on Mon, Nov 20, 2023, 9:51 AM HAST (19:51 UTC), 175 km (109 mi) below the surface.

A larger quake followed: M4.3 84 km WSW of Atka, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.2 (ml), minor
Local time: Mon, Nov 20, 2023, 9:51 AM HAST
UTC: 2023-11-20 19:51:55 UTC
Depth: 175.2 km (108.8 mi), intermediate-depth
Epicenter: 52.387° N, 174.700° 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 19.9 km horizontally, 10.2 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 195°, poorly surrounded by stations
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 63 in the 60 days after this one and 48 in the 30 days before it.

After

The first 60 of 63.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lppq (also filed as ak023ew5qq9m). Read Wed, Sep 30, 2026, 11:54 PM UTC.