Alaska earthquakes

M5.7 earthquake 81 km SSW of Atka, Alaska

A magnitude 5.7 earthquake struck 81 km SSW of Atka, Alaska on Sun, May 11, 1986, 1:48 PM HADT (22:48 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.5 25 km NW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 5.7 (mw), moderate
Local time: Sun, May 11, 1986, 1:48 PM HADT
UTC: 1986-05-11 22:48:45 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.526° N, 174.670° 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 2.7 and up: 115 in the 60 days after this one and 124 in the 30 days before it.

After

The first 60 of 115.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tws (also filed as gcmtb051186d, ushis3947, gcmt19860511224845, iscgem495420). Read Wed, Sep 30, 2026, 5:11 PM UTC.