Alaska earthquakes

M5.0 earthquake 26 km SW of Adak, Alaska

A magnitude 5.0 earthquake struck 26 km SW of Adak, Alaska on Wed, Jul 9, 1986, 11:24 AM HADT (20:24 UTC), 57 km (35 mi) below the surface.

A larger quake followed: M5.2 57 km SSE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 5.0 (mw), moderate
Local time: Wed, Jul 9, 1986, 11:24 AM HADT
UTC: 1986-07-09 20:24:51 UTC
Depth: 57.0 km (35.4 mi), shallow
Epicenter: 51.683° N, 176.868° 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.

Nearby

Within 100 km, magnitude 2.0 and up: 21 in the 60 days after this one and 24 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002vvx (also filed as gcmtb070986b, gcmt19860709202452, iscgem490385). Read Tue, Sep 22, 2026, 11:27 PM UTC.