Alaska earthquakes

M4.0 earthquake 99 km S of Adak, Alaska

A magnitude 4.0 earthquake struck 99 km S of Adak, Alaska on Fri, May 9, 1986, 7:03 PM HADT (04:03 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.3 83 km SSE 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
4.0 (mb), light
Local time
UTC
1986-05-10 04:03:45 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
50.990° N, 176.453° 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: 80 in the 60 days after this one and 71 in the 30 days before it.

After

  1. 4.383 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 29 km away
  2. 4.878 km SE of Adak, Alaska · 14746 days ago · 33 km deep · 57 km away
  3. 4.970 km SE of Adak, Alaska · 14745 days ago · 33 km deep · 66 km away
  4. 4.885 km S of Adak, Alaska · 14745 days ago · 33 km deep · 17 km away
  5. 4.6104 km SE of Adak, Alaska · 14745 days ago · 33 km deep · 85 km away
  6. 5.387 km SSE of Adak, Alaska · 14745 days ago · 33 km deep · 32 km away
  7. 4.523 km SE of Adak, Alaska · 14744 days ago · 33 km deep · 80 km away
  8. 4.967 km S of Adak, Alaska · 14744 days ago · 33 km deep · 32 km away
  9. 4.6Andreanof Islands, Aleutian Islands, Alaska · 14744 days ago · 33 km deep · 84 km away
  10. 4.287 km SSE of Adak, Alaska · 14744 days ago · 33 km deep · 24 km away
  11. 4.489 km SSE of Adak, Alaska · 14744 days ago · 33 km deep · 25 km away
  12. 4.891 km SSE of Adak, Alaska · 14744 days ago · 33 km deep · 34 km away
  13. 4.750 km SSE of Adak, Alaska · 14744 days ago · 33 km deep · 53 km away
  14. 4.2Andreanof Islands, Aleutian Islands, Alaska · 14744 days ago · 33 km deep · 38 km away
  15. 4.795 km ESE of Adak, Alaska · 14743 days ago · 33 km deep · 85 km away
  16. 3.888 km SSE of Adak, Alaska · 14743 days ago · 33 km deep · 32 km away
  17. 4.990 km SSE of Adak, Alaska · 14742 days ago · 33 km deep · 27 km away
  18. 4.873 km ESE of Adak, Alaska · 14742 days ago · 33 km deep · 79 km away
  19. 4.984 km SSE of Adak, Alaska · 14741 days ago · 33 km deep · 23 km away
  20. 4.783 km SE of Adak, Alaska · 14741 days ago · 33 km deep · 63 km away
  21. 4.882 km SE of Adak, Alaska · 14741 days ago · 33 km deep · 59 km away
  22. 4.993 km SE of Adak, Alaska · 14741 days ago · 33 km deep · 80 km away
  23. 4.0122 km SSW of Atka, Alaska · 14740 days ago · 33 km deep · 97 km away
  24. 4.3114 km SE of Adak, Alaska · 14739 days ago · 33 km deep · 87 km away
  25. 4.7Andreanof Islands, Aleutian Islands, Alaska · 14739 days ago · 33 km deep · 27 km away
  26. 3.880 km SE of Adak, Alaska · 14739 days ago · 33 km deep · 68 km away
  27. 4.5133 km SE of Adak, Alaska · 14738 days ago · 33 km deep · 85 km away
  28. 4.677 km SSE of Adak, Alaska · 14738 days ago · 33 km deep · 43 km away
  29. 4.555 km SSW of Adak, Alaska · 14738 days ago · 33 km deep · 52 km away
  30. 4.077 km SE of Adak, Alaska · 14737 days ago · 33 km deep · 56 km away
  31. 4.8106 km SE of Adak, Alaska · 14737 days ago · 33 km deep · 69 km away
  32. 4.9112 km ESE of Adak, Alaska · 14736 days ago · 33 km deep · 97 km away
  33. 4.898 km SSE of Adak, Alaska · 14735 days ago · 33 km deep · 7 km away
  34. 4.6113 km SW of Atka, Alaska · 14735 days ago · 33 km deep · 98 km away
  35. 4.886 km S of Adak, Alaska · 14735 days ago · 33 km deep · 12 km away
  36. 4.795 km S of Adak, Alaska · 14735 days ago · 33 km deep · 6 km away
  37. 3.875 km SE of Adak, Alaska · 14735 days ago · 33 km deep · 56 km away
  38. 4.668 km SSE of Adak, Alaska · 14735 days ago · 33 km deep · 41 km away
  39. 4.898 km SE of Adak, Alaska · 14734 days ago · 33 km deep · 76 km away
  40. 4.573 km ESE of Adak, Alaska · 14733 days ago · 33 km deep · 85 km away
  41. 4.5104 km SE of Adak, Alaska · 14733 days ago · 33 km deep · 65 km away
  42. 4.989 km SSE of Adak, Alaska · 14733 days ago · 33 km deep · 28 km away
  43. 4.689 km SSE of Adak, Alaska · 14731 days ago · 33 km deep · 22 km away
  44. 4.892 km SSE of Adak, Alaska · 14731 days ago · 33 km deep · 33 km away
  45. 4.763 km SSE of Adak, Alaska · 14730 days ago · 33 km deep · 50 km away
  46. 4.281 km SE of Adak, Alaska · 14729 days ago · 33 km deep · 67 km away
  47. 4.881 km SSE of Adak, Alaska · 14727 days ago · 33 km deep · 38 km away
  48. 4.8113 km SE of Adak, Alaska · 14726 days ago · 33 km deep · 87 km away
  49. 4.386 km SE of Adak, Alaska · 14724 days ago · 33 km deep · 64 km away
  50. 4.181 km SSE of Adak, Alaska · 14723 days ago · 33 km deep · 27 km away
  51. 5.1106 km SE of Adak, Alaska · 14719 days ago · 33 km deep · 87 km away
  52. 4.7107 km SSW of Adak, Alaska · 14716 days ago · 33 km deep · 73 km away
  53. 4.379 km SSE of Adak, Alaska · 14715 days ago · 33 km deep · 45 km away
  54. 4.577 km SE of Adak, Alaska · 14714 days ago · 33 km deep · 49 km away
  55. 4.682 km SE of Adak, Alaska · 14714 days ago · 33 km deep · 62 km away
  56. 6.557 km S of Adak, Alaska · 14707 days ago · 27 km deep · 43 km away
  57. 4.589 km SSE of Adak, Alaska · 14707 days ago · 33 km deep · 37 km away
  58. 4.883 km SSE of Adak, Alaska · 14706 days ago · 33 km deep · 31 km away
  59. 4.271 km SE of Adak, Alaska · 14706 days ago · 33 km deep · 57 km away
  60. 4.536 km SW of Adak, Alaska · 14706 days ago · 33 km deep · 77 km away

The first 60 of 80.

Before

  1. 4.4110 km ESE of Adak, Alaska · 14746 days ago · 33 km deep · 95 km away
  2. 5.0111 km SE of Adak, Alaska · 14746 days ago · 33 km deep · 67 km away
  3. 5.276 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 29 km away
  4. 5.097 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 16 km away
  5. 4.889 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 18 km away
  6. 4.493 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 13 km away
  7. 5.158 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 52 km away
  8. 4.883 km SSE of Adak, Alaska · 14746 days ago · 33 km deep · 29 km away
  9. 4.587 km SE of Adak, Alaska · 14746 days ago · 33 km deep · 48 km away
  10. 4.559 km ESE of Adak, Alaska · 14746 days ago · 33 km deep · 84 km away
  11. 4.876 km ESE of Adak, Alaska · 14747 days ago · 33 km deep · 88 km away
  12. 4.489 km ESE of Adak, Alaska · 14747 days ago · 33 km deep · 88 km away
  13. 4.890 km SSW of Adak, Alaska · 14747 days ago · 33 km deep · 39 km away
  14. 5.6Andreanof Islands, Aleutian Islands, Alaska · 14747 days ago · 33 km deep · 37 km away
  15. 5.675 km SSW of Adak, Alaska · 14747 days ago · 33 km deep · 41 km away
  16. 4.863 km SSE of Adak, Alaska · 14747 days ago · 33 km deep · 43 km away
  17. 4.5Andreanof Islands, Aleutian Islands, Alaska · 14747 days ago · 33 km deep · 30 km away
  18. 4.683 km SE of Adak, Alaska · 14747 days ago · 33 km deep · 62 km away
  19. 4.993 km ESE of Adak, Alaska · 14747 days ago · 33 km deep · 85 km away
  20. 5.288 km SSE of Adak, Alaska · 14747 days ago · 33 km deep · 33 km away

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From the USGS Earthquake Hazards Program and its partner networks, event usp0002tum. Read Tue, Sep 22, 2026, 10:27 PM UTC.