Alaska earthquakes

M5.6 earthquake 75 km SSW of Adak, Alaska

A magnitude 5.6 earthquake struck 75 km SSW of Adak, Alaska on Thu, May 8, 1986, 4:05 PM HADT (01:05 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: 5.6 (ms), moderate
Local time: Thu, May 8, 1986, 4:05 PM HADT
UTC: 1986-05-09 01:05:30 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.218° N, 176.907° 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 2.6 and up: 80 in the 60 days after this one and 41 in the 30 days before it.

After

The first 60 of 80.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tsp (also filed as ushis3942, iscgem495141). Read Mon, Sep 28, 2026, 5:31 AM UTC.