Alaska earthquakes

M3.1 earthquake 55 km SSE of Adak, Alaska

A magnitude 3.1 earthquake struck 55 km SSE of Adak, Alaska on Fri, Aug 8, 2025, 6:38 AM HADT (15:38 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.0 32 km NNE of Adak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-08 15:38:33 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.392° N, 176.413° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 stations
2.5ML, local (Richter)Alaska Earthquake CenterPreliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 4.2 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
247°, poorly surrounded by stations
Stations used
11

Nearby

Within 100 km, magnitude 1.5 and up: 115 in the 60 days after this one and 140 in the 30 days before it.

After

  1. 1.813 km SW of Adak, Alaska · 420 days ago · 76 km deep · 53 km away
  2. 1.965 km SSW of Adak, Alaska · 419 days ago · 13 km deep · 42 km away
  3. 2.576 km SW of Adak, Alaska · 419 days ago · 46 km deep · 74 km away
  4. 1.735 km ENE of Adak, Alaska · 419 days ago · 107 km deep · 75 km away
  5. 1.740 km SSE of Adak, Alaska · 419 days ago · 31 km deep · 18 km away
  6. 1.955 km SE of Adak, Alaska · 418 days ago · 26 km deep · 22 km away
  7. 1.513 km SSE of Adak, Alaska · 418 days ago · 81 km deep · 42 km away
  8. 2.5106 km SSW of Adak, Alaska · 418 days ago · 10 km deep · 72 km away
  9. 3.752 km SSE of Adak, Alaska · 418 days ago · 35 km deep · 12 km away
  10. 2.694 km SW of Atka, Alaska · 417 days ago · 35 km deep · 87 km away
  11. 2.068 km SE of Adak, Alaska · 416 days ago · 38 km deep · 42 km away
  12. 1.874 km SSE of Adak, Alaska · 416 days ago · 13 km deep · 23 km away
  13. 1.955 km SSE of Adak, Alaska · 416 days ago · 27 km deep · 9 km away
  14. 1.590 km WSW of Adak, Alaska · 416 days ago · 31 km deep · 97 km away
  15. 1.718 km E of Adak, Alaska · 416 days ago · 90 km deep · 51 km away
  16. 1.663 km SE of Adak, Alaska · 415 days ago · 25 km deep · 32 km away
  17. 1.974 km SSE of Adak, Alaska · 415 days ago · 25 km deep · 18 km away
  18. 1.556 km SSW of Adak, Alaska · 415 days ago · 32 km deep · 45 km away
  19. 1.765 km ESE of Adak, Alaska · 415 days ago · 23 km deep · 45 km away
  20. 1.562 km SE of Adak, Alaska · 414 days ago · 26 km deep · 27 km away
  21. 1.946 km NE of Adak, Alaska · 414 days ago · 126 km deep · 87 km away
  22. 2.716 km SSE of Adak, Alaska · 414 days ago · 16 km deep · 39 km away
  23. 3.371 km SSW of Adak, Alaska · 413 days ago · 35 km deep · 44 km away
  24. 2.252 km SSE of Adak, Alaska · 413 days ago · 26 km deep · 5 km away
  25. 1.659 km SSE of Adak, Alaska · 412 days ago · 26 km deep · 18 km away
  26. 3.716 km SE of Adak, Alaska · 412 days ago · 100 km deep · 44 km away
  27. 2.948 km ESE of Adak, Alaska · 412 days ago · 63 km deep · 44 km away
  28. 1.779 km SW of Adak, Alaska · 411 days ago · 24 km deep · 82 km away
  29. 1.665 km WSW of Adak, Alaska · 411 days ago · 69 km deep · 84 km away
  30. 1.587 km WSW of Adak, Alaska · 411 days ago · 62 km deep · 97 km away
  31. 2.089 km SSE of Adak, Alaska · 410 days ago · 7 km deep · 34 km away
  32. 1.564 km SSW of Adak, Alaska · 410 days ago · 21 km deep · 35 km away
  33. 3.154 km SE of Adak, Alaska · 410 days ago · 35 km deep · 20 km away
  34. 1.862 km SE of Adak, Alaska · 410 days ago · 26 km deep · 34 km away
  35. 1.783 km SW of Adak, Alaska · 410 days ago · 39 km deep · 83 km away
  36. 1.663 km SE of Adak, Alaska · 409 days ago · 26 km deep · 22 km away
  37. 2.562 km SSW of Adak, Alaska · 409 days ago · 43 km deep · 47 km away
  38. 1.563 km SE of Adak, Alaska · 409 days ago · 26 km deep · 34 km away
  39. 2.798 km ESE of Adak, Alaska · 409 days ago · 35 km deep · 82 km away
  40. 1.853 km SSE of Adak, Alaska · 409 days ago · 24 km deep · 6 km away
  41. 3.164 km SE of Adak, Alaska · 409 days ago · 35 km deep · 30 km away
  42. 1.960 km SE of Adak, Alaska · 409 days ago · 23 km deep · 29 km away
  43. 1.854 km S of Adak, Alaska · 409 days ago · 26 km deep · 7 km away
  44. 1.799 km SW of Atka, Alaska · 408 days ago · 26 km deep · 87 km away
  45. 1.569 km SSW of Adak, Alaska · 408 days ago · 26 km deep · 40 km away
  46. 1.966 km W of Adak, Alaska · 408 days ago · 91 km deep · 94 km away
  47. 3.468 km SW of Adak, Alaska · 408 days ago · 60 km deep · 66 km away
  48. 3.197 km SW of Adak, Alaska · 406 days ago · 12 km deep · 96 km away
  49. 2.858 km WSW of Adak, Alaska · 406 days ago · 10 km deep · 76 km away
  50. 2.094 km SW of Adak, Alaska · 406 days ago · 27 km deep · 85 km away
  51. 2.665 km SSE of Adak, Alaska · 406 days ago · 35 km deep · 21 km away
  52. 3.093 km SW of Atka, Alaska · 406 days ago · 35 km deep · 89 km away
  53. 1.954 km SSE of Adak, Alaska · 405 days ago · 26 km deep · 3 km away
  54. 2.193 km ESE of Adak, Alaska · 405 days ago · 42 km deep · 83 km away
  55. 1.866 km SSE of Adak, Alaska · 405 days ago · 23 km deep · 13 km away
  56. 1.962 km SE of Adak, Alaska · 405 days ago · 23 km deep · 26 km away
  57. 1.962 km SSE of Adak, Alaska · 405 days ago · 24 km deep · 18 km away
  58. 1.964 km SE of Adak, Alaska · 404 days ago · 24 km deep · 21 km away
  59. 2.565 km S of Adak, Alaska · 404 days ago · 35 km deep · 29 km away
  60. 3.775 km SW of Adak, Alaska · 404 days ago · 40 km deep · 68 km away

The first 60 of 115.

Before

  1. 2.673 km SSW of Adak, Alaska · 420 days ago · 35 km deep · 47 km away
  2. 2.270 km SW of Adak, Alaska · 420 days ago · 37 km deep · 57 km away
  3. 1.978 km SW of Adak, Alaska · 420 days ago · 39 km deep · 79 km away
  4. 1.961 km SE of Adak, Alaska · 420 days ago · 23 km deep · 21 km away
  5. 1.647 km SSW of Adak, Alaska · 421 days ago · 29 km deep · 44 km away
  6. 2.793 km SW of Atka, Alaska · 421 days ago · 35 km deep · 89 km away
  7. 2.068 km SSW of Adak, Alaska · 421 days ago · 28 km deep · 45 km away
  8. 2.690 km SSE of Adak, Alaska · 421 days ago · 10 km deep · 37 km away
  9. 1.962 km SE of Adak, Alaska · 421 days ago · 26 km deep · 32 km away
  10. 1.854 km SSE of Adak, Alaska · 422 days ago · 26 km deep · 14 km away
  11. 3.0100 km SW of Adak, Alaska · 422 days ago · 35 km deep · 90 km away
  12. 1.568 km ENE of Adak, Alaska · 422 days ago · 18 km deep · 92 km away
  13. 1.8100 km SSE of Adak, Alaska · 423 days ago · 5 km deep · 45 km away
  14. 1.7114 km SW of Adak, Alaska · 423 days ago · 13 km deep · 94 km away
  15. 1.961 km SE of Adak, Alaska · 423 days ago · 26 km deep · 21 km away
  16. 2.569 km SSE of Adak, Alaska · 423 days ago · 34 km deep · 14 km away
  17. 1.649 km WSW of Adak, Alaska · 423 days ago · 77 km deep · 73 km away
  18. 4.854 km W of Adak, Alaska · 423 days ago · 87 km deep · 88 km away · felt by 4
  19. 1.691 km ESE of Adak, Alaska · 423 days ago · 26 km deep · 67 km away
  20. 2.093 km SE of Adak, Alaska · 423 days ago · 25 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rgn6 (also filed as ak025a43e2lc). Read Fri, Oct 2, 2026, 3:04 PM UTC.