Alaska earthquakes

M4.9 earthquake 75 km ESE of Adak, Alaska

A magnitude 4.9 earthquake struck 75 km ESE of Adak, Alaska on Thu, Jul 3, 1986, 8:58 PM HADT (05:58 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.5 27 km E 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
1986-07-04 05:58:48 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.503° N, 175.717° 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: 35 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 4.569 km SE of Adak, Alaska · 14688 days ago · 33 km deep · 25 km away
  2. 4.5Andreanof Islands, Aleutian Islands, Alaska · 14686 days ago · 33 km deep · 41 km away
  3. 5.527 km E of Adak, Alaska · 14685 days ago · 50 km deep · 58 km away
  4. 5.026 km SW of Adak, Alaska · 14685 days ago · 57 km deep · 82 km away
  5. 4.888 km SSW of Atka, Alaska · 14677 days ago · 33 km deep · 79 km away
  6. 4.0101 km SW of Atka, Alaska · 14676 days ago · 33 km deep · 39 km away
  7. 4.631 km SW of Atka, Alaska · 14674 days ago · 33 km deep · 98 km away
  8. 4.879 km SE of Adak, Alaska · 14673 days ago · 33 km deep · 6 km away
  9. 5.257 km SSE of Adak, Alaska · 14672 days ago · 33 km deep · 34 km away
  10. 4.983 km SSE of Adak, Alaska · 14672 days ago · 33 km deep · 46 km away
  11. 4.952 km S of Adak, Alaska · 14671 days ago · 33 km deep · 69 km away
  12. 4.993 km SW of Atka, Alaska · 14671 days ago · 33 km deep · 37 km away
  13. 5.876 km SSE of Adak, Alaska · 14670 days ago · 33 km deep · 43 km away
  14. 5.683 km SSE of Adak, Alaska · 14670 days ago · 33 km deep · 38 km away
  15. 4.669 km ESE of Adak, Alaska · 14670 days ago · 33 km deep · 28 km away
  16. 4.793 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 41 km away
  17. 4.497 km SSE of Adak, Alaska · 14668 days ago · 33 km deep · 58 km away
  18. 4.844 km E of Adak, Alaska · 14667 days ago · 33 km deep · 45 km away
  19. 5.588 km WSW of Atka, Alaska · 14666 days ago · 33 km deep · 42 km away
  20. 4.785 km SW of Atka, Alaska · 14666 days ago · 33 km deep · 45 km away
  21. 4.4Andreanof Islands, Aleutian Islands, Alaska · 14666 days ago · 33 km deep · 62 km away
  22. 4.883 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 50 km away
  23. 4.986 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 48 km away
  24. 4.354 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 39 km away
  25. 5.076 km SE of Adak, Alaska · 14662 days ago · 33 km deep · 28 km away
  26. 4.795 km SSW of Atka, Alaska · 14661 days ago · 33 km deep · 67 km away
  27. 5.979 km S of Adak, Alaska · 14661 days ago · 33 km deep · 84 km away
  28. 4.784 km S of Adak, Alaska · 14661 days ago · 33 km deep · 81 km away
  29. 4.987 km S of Adak, Alaska · 14660 days ago · 33 km deep · 83 km away
  30. 4.780 km S of Adak, Alaska · 14660 days ago · 33 km deep · 78 km away
  31. 4.3Andreanof Islands, Aleutian Islands, Alaska · 14654 days ago · 33 km deep · 71 km away
  32. 4.888 km SW of Atka, Alaska · 14650 days ago · 33 km deep · 42 km away
  33. 4.237 km E of Adak, Alaska · 14645 days ago · 33 km deep · 45 km away
  34. 4.364 km ESE of Adak, Alaska · 14643 days ago · 33 km deep · 21 km away
  35. 4.488 km SW of Atka, Alaska · 14631 days ago · 33 km deep · 42 km away

Before

  1. 5.063 km SE of Adak, Alaska · 14691 days ago · 33 km deep · 15 km away
  2. 4.761 km SW of Adak, Alaska · 14694 days ago · 33 km deep · 98 km away
  3. 4.484 km SSE of Adak, Alaska · 14695 days ago · 33 km deep · 47 km away
  4. 4.291 km SSE of Adak, Alaska · 14695 days ago · 33 km deep · 51 km away
  5. 4.093 km SSE of Adak, Alaska · 14695 days ago · 33 km deep · 53 km away
  6. 4.236 km S of Adak, Alaska · 14695 days ago · 33 km deep · 61 km away
  7. 5.475 km SSE of Adak, Alaska · 14695 days ago · 33 km deep · 41 km away
  8. 4.455 km SE of Adak, Alaska · 14695 days ago · 33 km deep · 21 km away
  9. 4.558 km S of Adak, Alaska · 14695 days ago · 33 km deep · 70 km away
  10. 4.853 km S of Adak, Alaska · 14695 days ago · 33 km deep · 68 km away
  11. 4.383 km SW of Atka, Alaska · 14702 days ago · 33 km deep · 47 km away
  12. 4.6101 km SE of Adak, Alaska · 14702 days ago · 33 km deep · 34 km away
  13. 4.4109 km SW of Atka, Alaska · 14702 days ago · 33 km deep · 36 km away
  14. 4.2118 km SSW of Atka, Alaska · 14703 days ago · 33 km deep · 46 km away
  15. 4.665 km WSW of Atka, Alaska · 14703 days ago · 33 km deep · 75 km away
  16. 4.887 km SW of Atka, Alaska · 14703 days ago · 33 km deep · 43 km away
  17. 4.4135 km SE of Adak, Alaska · 14703 days ago · 33 km deep · 61 km away
  18. 5.4125 km SE of Adak, Alaska · 14703 days ago · 33 km deep · 50 km away
  19. 4.7100 km SSW of Atka, Alaska · 14703 days ago · 33 km deep · 64 km away
  20. 4.576 km SE of Adak, Alaska · 14704 days ago · 33 km deep · 19 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002vpr. Read Wed, Sep 23, 2026, 2:36 AM UTC.