Alaska earthquakes

M4.2 earthquake 82 km SE of Atka, Alaska

A magnitude 4.2 earthquake struck 82 km SE of Atka, Alaska on Thu, Nov 13, 1975, 12:31 PM GMT-11 (23:31 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M5.2 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.2 (mb), light
Local time
UTC
1975-11-13 23:31:13 UTC
Depth
27.0 km (16.8 mi), shallow
Epicenter
51.672° N, 173.343° 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.

Stations used
11

Nearby

Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.2Andreanof Islands, Aleutian Islands, Alaska · 18567 days ago · 54 km deep · 8 km away

Before

  1. 4.2Andreanof Islands, Aleutian Islands, Alaska · 18575 days ago · 37 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000dk3. Read Tue, Sep 22, 2026, 6:35 AM UTC.