Alaska earthquakes

M5.4 earthquake 56 km SSE of Attu Station, Alaska

A magnitude 5.4 earthquake struck 56 km SSE of Attu Station, Alaska on Sat, Aug 10, 1985, 1:03 AM GMT+12 (13:03 UTC), 38 km (23 mi) below the surface.

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The earthquake

Magnitude
5.4 (mw), moderate
Local time
UTC
1985-08-09 13:03:10 UTC
Depth
37.6 km (23.4 mi), shallow
Epicenter
52.424° N, 173.648° 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.

Nearby

Within 100 km, magnitude 2.4 and up: 2 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 3.954 km NE of Attu Station, Alaska · 14998 days ago · 33 km deep · 86 km away
  2. 4.873 km SSE of Attu Station, Alaska · 14968 days ago · 33 km deep · 18 km away

Before

  1. 5.653 km SSE of Attu Station, Alaska · 15028 days ago · 46 km deep · 11 km away
  2. 4.8116 km SE of Attu Station, Alaska · 15043 days ago · 33 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002hht (also filed as gcmtb080985c, ushis3896, gcmt19850809130311, iscgem517678). Read Tue, Sep 22, 2026, 11:17 AM UTC.