Alaska earthquakes

M5.5 earthquake 195 km ESE of Attu Station, Alaska

A magnitude 5.5 earthquake struck 195 km ESE of Attu Station, Alaska on Thu, Jun 3, 1965, 7:43 PM GMT+12 (07:43 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M5.7 260 km ESE of Attu Station, Alaska. This one was a foreshock.

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The earthquake

Magnitude
5.5 (mw), moderate
Local time
UTC
1965-06-03 07:43:39 UTC
Depth
38.2 km (23.7 mi), shallow
Epicenter
51.959° N, 175.659° 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.

Magnitude uncertainty
±0.39
Depth from
From location

Nearby

Within 100 km, magnitude 2.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.7260 km ESE of Attu Station, Alaska · 22364 days ago · 45 km deep · 66 km away
  2. 5.8244 km SE of Attu Station, Alaska · 22339 days ago · 23 km deep · 58 km away

Before

  1. 5.9155 km ESE of Attu Station, Alaska · 22401 days ago · 28 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem855819 (also filed as ushis2816). Read Tue, Sep 22, 2026, 10:30 AM UTC.