Alaska earthquakes

M2.5 earthquake 62 km SSW of Adak, Alaska

A magnitude 2.5 earthquake struck 62 km SSW of Adak, Alaska on Mon, Aug 18, 2025, 7:35 PM HADT (04:35 UTC), 43 km (27 mi) below the surface.

A larger quake followed: M5.5 122 km SW 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
2.5 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-19 04:35:43 UTC
Depth
43.2 km (26.9 mi), shallow
Epicenter
51.389° N, 177.087° 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
2.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 18 stations
2.0ML, 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 5.8 km horizontally, 14.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
206°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 91 in the 60 days after this one and 139 in the 30 days before it.

After

  1. 1.563 km SE of Adak, Alaska · 409 days ago · 26 km deep · 79 km away
  2. 1.853 km SSE of Adak, Alaska · 409 days ago · 24 km deep · 51 km away
  3. 3.164 km SE of Adak, Alaska · 409 days ago · 35 km deep · 76 km away
  4. 1.960 km SE of Adak, Alaska · 409 days ago · 23 km deep · 75 km away
  5. 1.6111 km WSW of Adak, Alaska · 409 days ago · 7 km deep · 74 km away
  6. 1.854 km S of Adak, Alaska · 409 days ago · 26 km deep · 39 km away
  7. 1.8109 km WSW of Adak, Alaska · 408 days ago · 13 km deep · 74 km away
  8. 1.8133 km SW of Adak, Alaska · 408 days ago · 21 km deep · 80 km away
  9. 1.569 km SSW of Adak, Alaska · 408 days ago · 26 km deep · 15 km away
  10. 1.966 km W of Adak, Alaska · 408 days ago · 91 km deep · 58 km away
  11. 3.468 km SW of Adak, Alaska · 408 days ago · 60 km deep · 21 km away
  12. 1.9141 km WSW of Adak, Alaska · 407 days ago · 24 km deep · 94 km away
  13. 3.197 km SW of Adak, Alaska · 406 days ago · 12 km deep · 49 km away
  14. 2.858 km WSW of Adak, Alaska · 406 days ago · 10 km deep · 39 km away
  15. 2.094 km SW of Adak, Alaska · 406 days ago · 27 km deep · 39 km away
  16. 2.665 km SSE of Adak, Alaska · 406 days ago · 35 km deep · 67 km away
  17. 1.954 km SSE of Adak, Alaska · 405 days ago · 26 km deep · 44 km away
  18. 1.866 km SSE of Adak, Alaska · 405 days ago · 23 km deep · 57 km away
  19. 1.962 km SE of Adak, Alaska · 405 days ago · 23 km deep · 73 km away
  20. 1.962 km SSE of Adak, Alaska · 405 days ago · 24 km deep · 65 km away
  21. 1.964 km SE of Adak, Alaska · 404 days ago · 24 km deep · 67 km away
  22. 2.565 km S of Adak, Alaska · 404 days ago · 35 km deep · 22 km away
  23. 3.775 km SW of Adak, Alaska · 404 days ago · 40 km deep · 22 km away
  24. 3.088 km SSE of Adak, Alaska · 404 days ago · 20 km deep · 70 km away
  25. 2.6129 km SW of Adak, Alaska · 403 days ago · 35 km deep · 79 km away
  26. 1.962 km SE of Adak, Alaska · 403 days ago · 26 km deep · 80 km away
  27. 1.846 km SSE of Adak, Alaska · 403 days ago · 29 km deep · 54 km away
  28. 1.7130 km WSW of Adak, Alaska · 403 days ago · 7 km deep · 95 km away
  29. 2.596 km SSE of Adak, Alaska · 402 days ago · 10 km deep · 76 km away
  30. 1.891 km SSE of Adak, Alaska · 402 days ago · 17 km deep · 71 km away
  31. 2.191 km SSE of Adak, Alaska · 402 days ago · 15 km deep · 70 km away
  32. 1.995 km WSW of Adak, Alaska · 402 days ago · 57 km deep · 55 km away
  33. 2.6107 km SSE of Adak, Alaska · 402 days ago · 10 km deep · 82 km away
  34. 2.692 km SSE of Adak, Alaska · 402 days ago · 10 km deep · 70 km away
  35. 2.894 km SSE of Adak, Alaska · 402 days ago · 10 km deep · 75 km away
  36. 2.9101 km SSE of Adak, Alaska · 402 days ago · 13 km deep · 80 km away
  37. 3.388 km SSE of Adak, Alaska · 402 days ago · 24 km deep · 71 km away
  38. 3.4105 km SSE of Adak, Alaska · 402 days ago · 12 km deep · 79 km away
  39. 1.891 km SSE of Adak, Alaska · 402 days ago · 25 km deep · 72 km away
  40. 1.884 km SSE of Adak, Alaska · 402 days ago · 18 km deep · 67 km away
  41. 1.967 km SSW of Adak, Alaska · 402 days ago · 33 km deep · 10 km away
  42. 1.9127 km SW of Adak, Alaska · 402 days ago · 26 km deep · 73 km away
  43. 1.7140 km WSW of Adak, Alaska · 402 days ago · 23 km deep · 92 km away
  44. 1.897 km WSW of Adak, Alaska · 401 days ago · 54 km deep · 52 km away
  45. 3.253 km SE of Adak, Alaska · 401 days ago · 35 km deep · 73 km away
  46. 2.698 km SSE of Adak, Alaska · 401 days ago · 10 km deep · 77 km away
  47. 1.656 km WSW of Adak, Alaska · 401 days ago · 7 km deep · 48 km away
  48. 1.8121 km WSW of Adak, Alaska · 401 days ago · 34 km deep · 78 km away
  49. 2.96 km SSE of Adak, Alaska · 401 days ago · 75 km deep · 58 km away
  50. 1.9131 km WSW of Adak, Alaska · 400 days ago · 29 km deep · 83 km away
  51. 2.290 km SSE of Adak, Alaska · 400 days ago · 13 km deep · 69 km away
  52. 2.799 km SSE of Adak, Alaska · 400 days ago · 33 km deep · 76 km away
  53. 2.094 km SSE of Adak, Alaska · 400 days ago · 26 km deep · 74 km away
  54. 1.642 km SSE of Adak, Alaska · 400 days ago · 36 km deep · 54 km away
  55. 1.756 km SE of Adak, Alaska · 400 days ago · 25 km deep · 65 km away
  56. 1.688 km SW of Adak, Alaska · 400 days ago · 23 km deep · 38 km away
  57. 2.9101 km SW of Adak, Alaska · 398 days ago · 35 km deep · 46 km away
  58. 3.3109 km WSW of Adak, Alaska · 398 days ago · 13 km deep · 69 km away
  59. 2.147 km SE of Adak, Alaska · 398 days ago · 37 km deep · 64 km away
  60. 2.031 km SSW of Adak, Alaska · 396 days ago · 63 km deep · 32 km away

The first 60 of 91.

Before

  1. 1.663 km SE of Adak, Alaska · 409 days ago · 26 km deep · 68 km away
  2. 1.783 km SW of Adak, Alaska · 409 days ago · 39 km deep · 37 km away
  3. 1.862 km SE of Adak, Alaska · 410 days ago · 26 km deep · 79 km away
  4. 3.154 km SE of Adak, Alaska · 410 days ago · 35 km deep · 65 km away
  5. 1.564 km SSW of Adak, Alaska · 410 days ago · 21 km deep · 15 km away
  6. 2.089 km SSE of Adak, Alaska · 410 days ago · 7 km deep · 65 km away
  7. 1.5120 km WSW of Adak, Alaska · 410 days ago · 7 km deep · 79 km away
  8. 1.7114 km WSW of Adak, Alaska · 410 days ago · 10 km deep · 78 km away
  9. 1.587 km WSW of Adak, Alaska · 411 days ago · 62 km deep · 52 km away
  10. 1.665 km WSW of Adak, Alaska · 411 days ago · 69 km deep · 45 km away
  11. 1.779 km SW of Adak, Alaska · 411 days ago · 24 km deep · 36 km away
  12. 2.948 km ESE of Adak, Alaska · 412 days ago · 63 km deep · 83 km away
  13. 1.6136 km SW of Adak, Alaska · 412 days ago · 26 km deep · 84 km away
  14. 1.6139 km SW of Adak, Alaska · 412 days ago · 26 km deep · 87 km away
  15. 3.716 km SE of Adak, Alaska · 412 days ago · 100 km deep · 63 km away
  16. 1.659 km SSE of Adak, Alaska · 412 days ago · 26 km deep · 64 km away
  17. 2.252 km SSE of Adak, Alaska · 413 days ago · 26 km deep · 43 km away
  18. 3.371 km SSW of Adak, Alaska · 413 days ago · 35 km deep · 13 km away
  19. 1.9130 km SW of Adak, Alaska · 414 days ago · 25 km deep · 74 km away
  20. 2.716 km SSE of Adak, Alaska · 414 days ago · 16 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000risw (also filed as ak025am3qhda). Read Fri, Oct 2, 2026, 1:55 PM UTC.