Alaska earthquakes

M5.1 earthquake 38 km ENE of Adak, Alaska

A magnitude 5.1 earthquake struck 38 km ENE of Adak, Alaska on Wed, Jul 11, 1973, 1:23 PM GMT-10 (23:23 UTC), 63 km (39 mi) below the surface.

A larger quake followed: M5.8 65 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
5.1 (mb), moderate
Local time
UTC
1973-07-11 23:23:11 UTC
Depth
63.0 km (39.1 mi), shallow
Epicenter
51.972° N, 176.102° 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
79

Nearby

Within 100 km, magnitude 2.1 and up: 9 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.739 km WNW of Atka, Alaska · 19418 days ago · 84 km deep · 100 km away
  2. 5.865 km S of Adak, Alaska · 19395 days ago · 47 km deep · 85 km away
  3. 5.263 km S of Adak, Alaska · 19395 days ago · 48 km deep · 83 km away
  4. 5.647 km S of Adak, Alaska · 19395 days ago · 62 km deep · 68 km away
  5. 4.037 km SSE of Adak, Alaska · 19395 days ago · 55 km deep · 48 km away
  6. 4.161 km SSE of Adak, Alaska · 19395 days ago · 47 km deep · 75 km away
  7. 4.661 km S of Adak, Alaska · 19395 days ago · 53 km deep · 81 km away
  8. 4.954 km S of Adak, Alaska · 19394 days ago · 51 km deep · 75 km away
  9. 4.779 km SE of Adak, Alaska · 19384 days ago · 40 km deep · 75 km away

Before

  1. 5.518 km W of Adak, Alaska · 19449 days ago · 62 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00002p7. Read Tue, Sep 22, 2026, 5:46 AM UTC.