Alaska earthquakes

M4.8 earthquake 96 km SSW of Atka, Alaska

A magnitude 4.8 earthquake struck 96 km SSW of Atka, Alaska on Thu, May 8, 1986, 1:01 PM HADT (22:01 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.1 76 km SSE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.8 (mb), light
Local time
UTC
1986-05-08 22:01:17 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.468° N, 174.969° 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 1.8 and up: 169 in the 60 days after this one and 30 in the 30 days before it.

After

The first 60 of 169.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002ts8. Read Tue, Sep 22, 2026, 9:29 PM UTC.