Alaska earthquakes

M4.8 earthquake 86 km SSE of Atka, Alaska

A magnitude 4.8 earthquake struck 86 km SSE of Atka, Alaska on Tue, May 13, 1986, 5:14 AM HADT (14:14 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.4 88 km SSE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.8 (mb), light
Local time
UTC
1986-05-13 14:14:56 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.551° N, 173.512° 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: 35 in the 60 days after this one and 82 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002tyx. Read Tue, Sep 22, 2026, 9:28 PM UTC.