Alaska earthquakes

M4.5 earthquake 130 km S of Unalaska, Alaska

A magnitude 4.5 earthquake struck 130 km S of Unalaska, Alaska on Sun, Aug 25, 1974, 12:22 AM GMT-9 (09:22 UTC), 33 km (21 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
1974-08-25 09:22:32 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
52.719° N, 166.910° 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.

Depth from
OPERATOR_ASSIGNED
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: 1 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.354 km ESE of Nikolski, Alaska · 19027 days ago · 49 km deep · 81 km away

Before

  1. 3.955 km SE of Nikolski, Alaska · 19028 days ago · 42 km deep · 88 km away
  2. 5.771 km SSE of Nikolski, Alaska · 19028 days ago · 41 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00007sh. Read Mon, Sep 28, 2026, 5:50 PM UTC.