Alaska earthquakes

M3.9 earthquake 53 km NE of Adak, Alaska

A magnitude 3.9 earthquake struck 53 km NE of Adak, Alaska on Sun, Nov 5, 2023, 11:00 PM HAST (09:00 UTC), 129 km (80 mi) below the surface.

A larger quake followed: M5.0 46 km SSW of Adak, 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: 3.9 (mb), minor
Local time: Sun, Nov 5, 2023, 11:00 PM HAST
UTC: 2023-11-06 09:00:53 UTC
Depth: 129.4 km (80.4 mi), intermediate-depth
Epicenter: 52.207° N, 176.073° 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 8.1 km horizontally, 8.1 km in depth
Magnitude uncertainty: ±0.21
Depth from: From location
Station coverage gap: 127°
Stations used: 31

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 74 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lpy9 (also filed as ak023e8tyltu). Read Wed, Sep 30, 2026, 10:28 PM UTC.