Alaska earthquakes

M2.6 earthquake 242 km W of Adak, Alaska

A magnitude 2.6 earthquake struck 242 km W of Adak, Alaska on Sat, Aug 23, 2025, 7:16 PM GMT+12 (07:16 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M5.9 237 km W 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
2.6 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-23 07:16:52 UTC
Depth
67.7 km (42.1 mi), shallow
Epicenter
51.563° N, 179.895° E
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
2.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.081 · 20 stations
2.4ML, 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 5.3 km horizontally, 6.3 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
153°
Stations used
26

Nearby

Within 100 km, magnitude 1.5 and up: 58 in the 60 days after this one and 97 in the 30 days before it.

After

  1. 2.1181 km WSW of Adak, Alaska · 405 days ago · 13 km deep · 72 km away
  2. 2.7173 km WSW of Adak, Alaska · 405 days ago · 26 km deep · 77 km away
  3. 2.0178 km WSW of Adak, Alaska · 404 days ago · 7 km deep · 76 km away
  4. 1.9169 km W of Adak, Alaska · 404 days ago · 10 km deep · 73 km away
  5. 2.7258 km WSW of Adak, Alaska · 404 days ago · 33 km deep · 39 km away
  6. 2.0181 km WSW of Adak, Alaska · 404 days ago · 9 km deep · 69 km away
  7. 2.0Rat Islands, Aleutian Islands, Alaska · 404 days ago · 40 km deep · 64 km away
  8. 1.9Rat Islands, Aleutian Islands, Alaska · 403 days ago · 53 km deep · 72 km away
  9. 2.2157 km WSW of Adak, Alaska · 403 days ago · 23 km deep · 96 km away
  10. 1.9173 km WSW of Adak, Alaska · 402 days ago · 21 km deep · 77 km away
  11. 2.6Rat Islands, Aleutian Islands, Alaska · 402 days ago · 67 km deep · 100 km away
  12. 1.9180 km W of Adak, Alaska · 401 days ago · 100 km deep · 66 km away
  13. 2.5192 km W of Adak, Alaska · 401 days ago · 128 km deep · 56 km away
  14. 1.8250 km W of Adak, Alaska · 401 days ago · 83 km deep · 17 km away
  15. 2.5143 km W of Adak, Alaska · 401 days ago · 102 km deep · 98 km away
  16. 2.8Rat Islands, Aleutian Islands, Alaska · 401 days ago · 106 km deep · 100 km away
  17. 1.7157 km WSW of Adak, Alaska · 401 days ago · 18 km deep · 97 km away
  18. 1.7201 km WSW of Adak, Alaska · 401 days ago · 43 km deep · 47 km away
  19. 1.7Rat Islands, Aleutian Islands, Alaska · 401 days ago · 36 km deep · 76 km away
  20. 5.9237 km W of Adak, Alaska · 400 days ago · 130 km deep · 63 km away · felt by 2 · tsunami flag
  21. 2.3239 km W of Adak, Alaska · 400 days ago · 127 km deep · 35 km away
  22. 2.2236 km W of Adak, Alaska · 400 days ago · 129 km deep · 37 km away
  23. 2.0237 km W of Adak, Alaska · 400 days ago · 127 km deep · 34 km away
  24. 1.9237 km W of Adak, Alaska · 400 days ago · 119 km deep · 33 km away
  25. 2.0211 km W of Adak, Alaska · 400 days ago · 58 km deep · 31 km away
  26. 5.1260 km W of Adak, Alaska · 400 days ago · 81 km deep · 26 km away · tsunami flag
  27. 3.7264 km W of Adak, Alaska · 399 days ago · 77 km deep · 23 km away
  28. 2.7265 km W of Adak, Alaska · 398 days ago · 78 km deep · 25 km away
  29. 1.7143 km W of Adak, Alaska · 396 days ago · 11 km deep · 98 km away
  30. 2.1Rat Islands, Aleutian Islands, Alaska · 395 days ago · 148 km deep · 84 km away
  31. 1.6246 km WSW of Adak, Alaska · 395 days ago · 45 km deep · 13 km away
  32. 1.6266 km W of Adak, Alaska · 395 days ago · 68 km deep · 24 km away
  33. 1.6222 km W of Adak, Alaska · 394 days ago · 95 km deep · 31 km away
  34. 2.5240 km WSW of Adak, Alaska · 394 days ago · 5 km deep · 72 km away
  35. 2.1187 km WSW of Adak, Alaska · 387 days ago · 18 km deep · 68 km away
  36. 4.5261 km W of Adak, Alaska · 385 days ago · 73 km deep · 20 km away
  37. 3.2231 km WSW of Adak, Alaska · 381 days ago · 15 km deep · 16 km away
  38. 1.9159 km WSW of Adak, Alaska · 378 days ago · 30 km deep · 92 km away
  39. 2.0Rat Islands, Aleutian Islands, Alaska · 377 days ago · 4 km deep · 84 km away
  40. 1.5151 km W of Adak, Alaska · 372 days ago · 14 km deep · 90 km away
  41. 2.1164 km WSW of Adak, Alaska · 372 days ago · 16 km deep · 79 km away
  42. 2.0264 km W of Adak, Alaska · 372 days ago · 4 km deep · 38 km away
  43. 2.6171 km W of Adak, Alaska · 371 days ago · 88 km deep · 71 km away
  44. 2.6225 km W of Adak, Alaska · 371 days ago · 84 km deep · 21 km away
  45. 1.9253 km W of Adak, Alaska · 370 days ago · 3 km deep · 36 km away
  46. 2.2257 km W of Adak, Alaska · 370 days ago · 12 km deep · 44 km away
  47. 1.9258 km W of Adak, Alaska · 367 days ago · 9 km deep · 42 km away
  48. 3.2236 km WSW of Adak, Alaska · 363 days ago · 11 km deep · 56 km away
  49. 4.2200 km W of Adak, Alaska · 363 days ago · 79 km deep · 42 km away
  50. 3.8253 km W of Adak, Alaska · 363 days ago · 173 km deep · 66 km away
  51. 4.2Rat Islands, Aleutian Islands, Alaska · 363 days ago · 18 km deep · 92 km away
  52. 4.5240 km WSW of Adak, Alaska · 356 days ago · 35 km deep · 64 km away
  53. 3.4246 km WSW of Adak, Alaska · 356 days ago · 35 km deep · 74 km away
  54. 1.7260 km W of Adak, Alaska · 356 days ago · 8 km deep · 44 km away
  55. 1.9259 km W of Adak, Alaska · 354 days ago · 7 km deep · 51 km away
  56. 2.6144 km WSW of Adak, Alaska · 353 days ago · 80 km deep · 98 km away
  57. 2.8221 km W of Adak, Alaska · 351 days ago · 10 km deep · 21 km away
  58. 2.8206 km W of Adak, Alaska · 350 days ago · 96 km deep · 37 km away

Before

  1. 3.0Rat Islands, Aleutian Islands, Alaska · 406 days ago · 72 km deep · 72 km away
  2. 3.0179 km WSW of Adak, Alaska · 406 days ago · 23 km deep · 71 km away
  3. 2.6270 km W of Adak, Alaska · 406 days ago · 114 km deep · 40 km away
  4. 4.0298 km WSW of Adak, Alaska · 407 days ago · 41 km deep · 62 km away
  5. 2.9217 km W of Adak, Alaska · 407 days ago · 123 km deep · 42 km away
  6. 2.0Rat Islands, Aleutian Islands, Alaska · 408 days ago · 78 km deep · 96 km away
  7. 3.3Rat Islands, Aleutian Islands, Alaska · 408 days ago · 23 km deep · 88 km away
  8. 1.9254 km W of Adak, Alaska · 408 days ago · 99 km deep · 31 km away
  9. 1.8228 km W of Adak, Alaska · 408 days ago · 72 km deep · 16 km away
  10. 2.1Rat Islands, Aleutian Islands, Alaska · 408 days ago · 22 km deep · 71 km away
  11. 1.7178 km WSW of Adak, Alaska · 408 days ago · 16 km deep · 75 km away
  12. 1.8193 km WSW of Adak, Alaska · 409 days ago · 21 km deep · 67 km away
  13. 3.0Rat Islands, Aleutian Islands, Alaska · 409 days ago · 30 km deep · 92 km away
  14. 2.6211 km WSW of Adak, Alaska · 409 days ago · 32 km deep · 51 km away
  15. 2.7238 km W of Adak, Alaska · 409 days ago · 136 km deep · 48 km away
  16. 2.0233 km WSW of Adak, Alaska · 409 days ago · 2 km deep · 80 km away
  17. 1.8281 km W of Adak, Alaska · 409 days ago · 59 km deep · 39 km away
  18. 1.7153 km W of Adak, Alaska · 410 days ago · 78 km deep · 88 km away
  19. 1.8Rat Islands, Aleutian Islands, Alaska · 410 days ago · 76 km deep · 78 km away
  20. 1.7184 km WSW of Adak, Alaska · 410 days ago · 13 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rk2m (also filed as ak025asrk4sj). Read Fri, Oct 2, 2026, 9:41 PM UTC.