Alaska earthquakes

M5.4 earthquake 46 km NW of Attu Station, Alaska

A magnitude 5.4 earthquake struck 46 km NW of Attu Station, Alaska on Sat, Aug 31, 1985, 5:31 AM GMT+12 (17:31 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
5.4 (mw), moderate
Local time
UTC
1985-08-30 17:31:11 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
53.097° N, 172.629° E
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: 1 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 3.954 km NE of Attu Station, Alaska · 14998 days ago · 33 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002j9e (also filed as gcmtb083085a, ushis3900, gcmt19850830173111, iscgem519197). Read Tue, Sep 22, 2026, 9:45 AM UTC.