Alaska earthquakes

M5.1 earthquake 83 km WNW of Adak, Alaska

A magnitude 5.1 earthquake struck 83 km WNW of Adak, Alaska on Tue, Dec 27, 1983, 2:16 PM HAST (00:16 UTC), 111 km (69 mi) below the surface.

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The earthquake

Magnitude
5.1 (mb), moderate
Local time
UTC
1983-12-28 00:16:34 UTC
Depth
110.6 km (68.7 mi), intermediate-depth
Epicenter
52.077° N, 177.801° 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.

Nearby

Within 100 km, magnitude 2.1 and up: 1 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.416 km ENE of Adak, Alaska · 15599 days ago · 57 km deep · 98 km away

Before

  1. 4.733 km WSW of Adak, Alaska · 15624 days ago · 79 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00020v7 (also filed as gcmtb122883b, gcmt19831228001634, iscgem563772). Read Tue, Sep 22, 2026, 8:26 PM UTC.