Alaska earthquakes

M4.1 earthquake 239 km WSW of Adak, Alaska

A magnitude 4.1 earthquake struck 239 km WSW of Adak, Alaska on Mon, May 28, 1973, 1:45 PM GMT-12 (01:45 UTC), 46 km (29 mi) below the surface.

A larger quake followed: M5.8 201 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.1 (mb), light
Local time
UTC
1973-05-29 01:45:26 UTC
Depth
46.0 km (28.6 mi), shallow
Epicenter
51.177° N, 179.899° 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
15

Nearby

Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 5.8201 km WSW of Adak, Alaska · 19457 days ago · 48 km deep · 38 km away
  2. 5.4204 km WSW of Adak, Alaska · 19457 days ago · 50 km deep · 35 km away
  3. 4.4190 km WSW of Adak, Alaska · 19456 days ago · 51 km deep · 50 km away

Before

  1. 4.9221 km WSW of Adak, Alaska · 19477 days ago · 56 km deep · 19 km away
  2. 5.8222 km WSW of Adak, Alaska · 19477 days ago · 39 km deep · 24 km away
  3. 5.3207 km WSW of Adak, Alaska · 19493 days ago · 61 km deep · 34 km away
  4. 3.7186 km SW of Adak, Alaska · 19504 days ago · 33 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00001yq. Read Tue, Sep 22, 2026, 10:04 AM UTC.