Alaska earthquakes

M5.4 earthquake 92 km S of Atka, Alaska

A magnitude 5.4 earthquake struck 92 km S of Atka, Alaska on Fri, Aug 1, 1986, 12:05 PM HADT (21:05 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude: 5.4 (mw), moderate
Local time: Fri, Aug 1, 1986, 12:05 PM HADT
UTC: 1986-08-01 21:05:39 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.369° N, 174.283° 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: 11 in the 60 days after this one and 10 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wt2 (also filed as gcmtb080186c, ushis3997, gcmt19860801210539, iscgem487746). Read Tue, Sep 22, 2026, 4:35 PM UTC.