Alaska earthquakes

M4.5 earthquake 114 km SSW of Atka, Alaska

A magnitude 4.5 earthquake struck 114 km SSW of Atka, Alaska on Wed, Dec 11, 1985, 2:11 AM HAST (12:11 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
1985-12-11 12:11:19 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.324° N, 175.075° 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.

Depth from
OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.5Andreanof Islands, Aleutian Islands, Alaska · 14883 days ago · 156 km deep · 97 km away

Before

  1. 4.363 km W of Atka, Alaska · 14895 days ago · 33 km deep · 96 km away
  2. 4.4118 km SE of Adak, Alaska · 14895 days ago · 33 km deep · 11 km away
  3. 4.869 km SSW of Atka, Alaska · 14905 days ago · 33 km deep · 49 km away
  4. 5.188 km SSW of Atka, Alaska · 14915 days ago · 53 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002ns1. Read Tue, Sep 22, 2026, 7:42 AM UTC.