Alaska earthquakes

M4.5 earthquake 115 km SSW of Unalaska, Alaska

A magnitude 4.5 earthquake struck 115 km SSW of Unalaska, Alaska on Thu, May 1, 1975, 10:21 AM GMT-9 (19:21 UTC), 8 km (5 mi) below the surface.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
1975-05-01 19:21:02 UTC
Depth
8.0 km (5.0 mi), shallow
Epicenter
52.875° N, 167.006° 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.

Stations used
11

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 2 in the 30 days before it.

Before

  1. 4.887 km SW of Unalaska, Alaska · 18772 days ago · 33 km deep · 54 km away
  2. 5.1125 km ESE of Nikolski, Alaska · 18772 days ago · 17 km deep · 19 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000avk. Read Tue, Sep 22, 2026, 5:01 PM UTC.