Alaska earthquakes

M4.2 earthquake 122 km ESE of Atka, Alaska

A magnitude 4.2 earthquake struck 122 km ESE of Atka, Alaska on Thu, Mar 13, 1986, 3:16 AM HAST (13:16 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.7 79 km SSE of Atka, Alaska. This one was a foreshock.

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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
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1986-03-13 13:16:38 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.649° N, 172.648° 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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 4.785 km SSE of Atka, Alaska · 14795 days ago · 33 km deep · 67 km away
  2. 4.291 km S of Atka, Alaska · 14760 days ago · 33 km deep · 97 km away
  3. 5.481 km SSE of Atka, Alaska · 14759 days ago · 33 km deep · 87 km away
  4. 5.176 km SSE of Atka, Alaska · 14759 days ago · 33 km deep · 90 km away
  5. 5.141 km SSE of Atka, Alaska · 14759 days ago · 33 km deep · 99 km away
  6. 4.588 km SSE of Atka, Alaska · 14759 days ago · 33 km deep · 87 km away
  7. 4.369 km SE of Atka, Alaska · 14759 days ago · 33 km deep · 64 km away
  8. 4.795 km SSE of Atka, Alaska · 14758 days ago · 33 km deep · 64 km away
  9. 4.981 km SSE of Atka, Alaska · 14758 days ago · 33 km deep · 92 km away
  10. 4.570 km SE of Atka, Alaska · 14757 days ago · 33 km deep · 58 km away
  11. 4.840 km SSE of Atka, Alaska · 14757 days ago · 33 km deep · 100 km away
  12. 4.474 km SE of Atka, Alaska · 14757 days ago · 33 km deep · 58 km away
  13. 5.383 km SSE of Atka, Alaska · 14756 days ago · 33 km deep · 72 km away
  14. 5.383 km SSE of Atka, Alaska · 14756 days ago · 33 km deep · 74 km away
  15. 5.779 km SSE of Atka, Alaska · 14756 days ago · 33 km deep · 76 km away
  16. 4.885 km SE of Atka, Alaska · 14756 days ago · 33 km deep · 57 km away
  17. 4.589 km SE of Atka, Alaska · 14756 days ago · 33 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002rtz. Read Sun, Oct 4, 2026, 8:40 PM UTC.