M5.0 earthquake 96 km ESE of Adak, Alaska

A magnitude 5.0 earthquake struck 96 km ESE of Adak, Alaska on Wed, May 7, 1986, 3:10 PM HADT (00:10 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.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 2.0 and up: at least 200 in the 60 days after this one and 32 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tnn. Read Wed, Sep 30, 2026, 7:58 AM UTC.