Alaska earthquakes

M4.9 earthquake 52 km S of Adak, Alaska

A magnitude 4.9 earthquake struck 52 km S of Adak, Alaska on Wed, Jul 23, 1986, 3:42 PM HADT (00:42 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.9 79 km S of Adak, 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
4.9 (mb), light
Local time
UTC
1986-07-24 00:42:01 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.401° N, 176.693° 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 1.9 and up: 18 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 5.876 km SSE of Adak, Alaska · 14676 days ago · 33 km deep · 40 km away
  2. 5.683 km SSE of Adak, Alaska · 14676 days ago · 33 km deep · 50 km away
  3. 4.669 km ESE of Adak, Alaska · 14676 days ago · 33 km deep · 82 km away
  4. 4.793 km SSE of Adak, Alaska · 14675 days ago · 33 km deep · 60 km away
  5. 4.497 km SSE of Adak, Alaska · 14674 days ago · 33 km deep · 55 km away
  6. 4.844 km E of Adak, Alaska · 14673 days ago · 33 km deep · 71 km away
  7. 4.883 km SSE of Adak, Alaska · 14668 days ago · 33 km deep · 43 km away
  8. 4.986 km SSE of Adak, Alaska · 14668 days ago · 33 km deep · 47 km away
  9. 4.354 km SSE of Adak, Alaska · 14668 days ago · 33 km deep · 30 km away
  10. 5.076 km SE of Adak, Alaska · 14668 days ago · 33 km deep · 50 km away
  11. 5.979 km S of Adak, Alaska · 14667 days ago · 33 km deep · 27 km away
  12. 4.784 km S of Adak, Alaska · 14667 days ago · 33 km deep · 32 km away
  13. 4.987 km S of Adak, Alaska · 14666 days ago · 33 km deep · 34 km away
  14. 4.780 km S of Adak, Alaska · 14666 days ago · 33 km deep · 28 km away
  15. 4.237 km E of Adak, Alaska · 14651 days ago · 33 km deep · 64 km away
  16. 4.364 km ESE of Adak, Alaska · 14649 days ago · 33 km deep · 73 km away
  17. 4.946 km SW of Adak, Alaska · 14624 days ago · 33 km deep · 32 km away
  18. 4.594 km SSW of Adak, Alaska · 14621 days ago · 33 km deep · 44 km away

Before

  1. 4.983 km SSE of Adak, Alaska · 14678 days ago · 33 km deep · 44 km away
  2. 5.257 km SSE of Adak, Alaska · 14678 days ago · 33 km deep · 35 km away
  3. 4.879 km SE of Adak, Alaska · 14679 days ago · 33 km deep · 68 km away
  4. 5.026 km SW of Adak, Alaska · 14691 days ago · 57 km deep · 34 km away
  5. 5.527 km E of Adak, Alaska · 14691 days ago · 50 km deep · 64 km away
  6. 4.569 km SE of Adak, Alaska · 14694 days ago · 33 km deep · 47 km away
  7. 4.975 km ESE of Adak, Alaska · 14697 days ago · 33 km deep · 69 km away
  8. 5.063 km SE of Adak, Alaska · 14697 days ago · 33 km deep · 54 km away
  9. 4.761 km SW of Adak, Alaska · 14700 days ago · 33 km deep · 31 km away
  10. 4.484 km SSE of Adak, Alaska · 14701 days ago · 33 km deep · 45 km away
  11. 4.291 km SSE of Adak, Alaska · 14701 days ago · 33 km deep · 51 km away
  12. 4.093 km SSE of Adak, Alaska · 14701 days ago · 33 km deep · 53 km away
  13. 4.236 km S of Adak, Alaska · 14701 days ago · 33 km deep · 17 km away
  14. 5.475 km SSE of Adak, Alaska · 14701 days ago · 33 km deep · 40 km away
  15. 4.455 km SE of Adak, Alaska · 14701 days ago · 33 km deep · 55 km away
  16. 4.558 km S of Adak, Alaska · 14701 days ago · 33 km deep · 6 km away
  17. 4.853 km S of Adak, Alaska · 14701 days ago · 33 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wem. Read Tue, Sep 29, 2026, 3:37 AM UTC.