Alaska earthquakes

M5.4 earthquake 92 km S of Atka, Alaska

A magnitude 5.4 earthquake struck 92 km S of Atka, Alaska on Wed, May 7, 1986, 7:45 PM HADT (04:45 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.4 106 km SE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 5.4 (mb), moderate
Local time: Wed, May 7, 1986, 7:45 PM HADT
UTC: 1986-05-08 04:45:17 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.370° N, 174.136° 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 2.4 and up: 141 in the 60 days after this one and 46 in the 30 days before it.

After

The first 60 of 141.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tpy (also filed as iscgem495015). Read Wed, Sep 23, 2026, 12:52 AM UTC.