Alaska earthquakes

M6.0 earthquake 130 km ESE of Atka, Alaska

A magnitude 6.0 earthquake struck 130 km ESE of Atka, Alaska on Sat, Oct 1, 1960, 5:11 AM GMT-11 (16:11 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M6.5 143 km ESE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
6.0 (mw), strong
Local time
UTC
1960-10-01 16:11:00 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.721° N, 172.472° 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.

Magnitude uncertainty
±0.29
Depth from
From location

Nearby

Within 100 km, magnitude 2.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 6.5143 km ESE of Atka, Alaska · 24084 days ago · 36 km deep · 16 km away

Before

  1. 5.9180 km E of Atka, Alaska · 24126 days ago · 35 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem880450 (also filed as ushis2465). Read Tue, Sep 22, 2026, 10:26 PM UTC.