Alaska earthquakes

M5.6 earthquake 77 km S of Adak, Alaska

A magnitude 5.6 earthquake struck 77 km S of Adak, Alaska on Wed, May 7, 1986, 4:15 PM HADT (01:15 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.8 82 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 5.6 (mb), moderate
Local time: Wed, May 7, 1986, 4:15 PM HADT
UTC: 1986-05-08 01:15:15 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.189° N, 176.813° 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 2.5 and up: 121 in the 60 days after this one and 8 in the 30 days before it.

After

The first 60 of 121.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tp1 (also filed as ushis3938, iscgem494979). Read Wed, Sep 23, 2026, 5:02 AM UTC.