Alaska earthquakes

M5.3 earthquake 83 km SSE of Atka, Alaska

A magnitude 5.3 earthquake struck 83 km SSE of Atka, Alaska on Sun, May 11, 1986, 4:43 AM HADT (13:43 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.7 79 km SSE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 5.3 (mb), moderate
Local time: Sun, May 11, 1986, 4:43 AM HADT
UTC: 1986-05-11 13:43:51 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.511° N, 173.694° 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 2.3 and up: 56 in the 60 days after this one and 77 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002twa (also filed as iscgem495388). Read Tue, Sep 22, 2026, 9:28 PM UTC.