M4.1 earthquake 44 km SW of Atka, Alaska

A magnitude 4.1 earthquake struck 44 km SW of Atka, Alaska on Wed, May 7, 1986, 1:22 PM HADT (22:22 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M8.0 1986 Atka, Alaska Earthquake. 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 1.5 and up: at least 199 in the 60 days after this one and 6 in the 30 days before it.

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tmt. Read Wed, Sep 30, 2026, 6:36 AM UTC.