Alaska earthquakes

M4.7 earthquake 69 km NNE of Adak, Alaska

A magnitude 4.7 earthquake struck 69 km NNE of Adak, Alaska on Tue, Oct 28, 1980, 2:15 AM GMT-11 (13:15 UTC), 178 km (111 mi) below the surface.

A larger quake followed: M5.7 35 km ESE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.7 (mb), light
Local time
UTC
1980-10-28 13:15:46 UTC
Depth
178.0 km (110.6 mi), intermediate-depth
Epicenter
52.448° N, 176.237° 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
17

Nearby

Within 100 km, magnitude 1.7 and up: 1 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.735 km ESE of Adak, Alaska · 16741 days ago · 53 km deep · 73 km away

Before

  1. 4.951 km ESE of Adak, Alaska · 16770 days ago · 61 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001aj0. Read Tue, Sep 22, 2026, 8:55 AM UTC.