Alaska earthquakes

M4.6 earthquake 183 km W of Adak, Alaska

A magnitude 4.6 earthquake struck 183 km W of Adak, Alaska on Wed, Mar 7, 1973, 2:10 PM GMT-11 (01:10 UTC), 103 km (64 mi) below the surface.

A larger quake followed: M4.9 196 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1973-03-08 01:10:24 UTC
Depth
103.0 km (64.0 mi), intermediate-depth
Epicenter
51.879° N, 179.297° 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
21

Nearby

Within 100 km, magnitude 1.6 and up: 7 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.9196 km WSW of Adak, Alaska · 19542 days ago · 40 km deep · 78 km away
  2. 4.2209 km WSW of Adak, Alaska · 19542 days ago · 51 km deep · 85 km away
  3. 5.0134 km WSW of Adak, Alaska · 19528 days ago · 50 km deep · 79 km away
  4. 3.8224 km W of Adak, Alaska · 19521 days ago · 111 km deep · 44 km away
  5. 5.5173 km WSW of Adak, Alaska · 19517 days ago · 54 km deep · 90 km away
  6. 3.9263 km WSW of Adak, Alaska · 19516 days ago · 66 km deep · 88 km away
  7. 4.8237 km WSW of Adak, Alaska · 19511 days ago · 54 km deep · 92 km away

Before

  1. 4.3183 km WSW of Adak, Alaska · 19563 days ago · 47 km deep · 59 km away
  2. 5.4192 km WSW of Adak, Alaska · 19579 days ago · 46 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00000vb. Read Tue, Sep 22, 2026, 3:07 PM UTC.