Alaska earthquakes

M5.3 earthquake 87 km SSE of Adak, Alaska

A magnitude 5.3 earthquake struck 87 km SSE of Adak, Alaska on Sun, May 11, 1986, 1:46 AM HADT (10:46 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.5 57 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 5.3 (mw), moderate
Local time: Sun, May 11, 1986, 1:46 AM HADT
UTC: 1986-05-11 10:46:22 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.165° N, 176.094° 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: 102 in the 60 days after this one and 117 in the 30 days before it.

After

The first 60 of 102.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tw6 (also filed as gcmtb051186b, gcmt19860511104622, iscgem495378). Read Mon, Sep 28, 2026, 8:03 PM UTC.