Alaska earthquakes

M2.5 earthquake 231 km W of Adak, Alaska

A magnitude 2.5 earthquake struck 231 km W of Adak, Alaska on Wed, Apr 30, 2025, 12:47 PM HADT (21:47 UTC), 79 km (49 mi) below the surface.

A larger quake followed: M4.3 174 km WSW 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
2025-04-30 21:47:22 UTC
Depth
79.5 km (49.4 mi), intermediate-depth
Epicenter
51.607° N, 179.953° 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 · ±0.115 · 10 stations
2.3ML, 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 3.7 km horizontally, 5.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
150°
Stations used
15

Nearby

Within 100 km, magnitude 1.5 and up: 161 in the 60 days after this one and 76 in the 30 days before it.

After

  1. 2.1244 km W of Adak, Alaska · 519 days ago · 83 km deep · 18 km away
  2. 1.9194 km W of Adak, Alaska · 519 days ago · 64 km deep · 37 km away
  3. 2.0142 km WSW of Adak, Alaska · 519 days ago · 60 km deep · 96 km away
  4. 3.2220 km W of Adak, Alaska · 519 days ago · 77 km deep · 13 km away
  5. 2.9135 km W of Adak, Alaska · 518 days ago · 18 km deep · 96 km away
  6. 2.0184 km WSW of Adak, Alaska · 518 days ago · 22 km deep · 63 km away
  7. 3.4250 km W of Adak, Alaska · 518 days ago · 170 km deep · 60 km away
  8. 3.1170 km WNW of Adak, Alaska · 517 days ago · 209 km deep · 94 km away
  9. 3.8Rat Islands, Aleutian Islands, Alaska · 517 days ago · 74 km deep · 83 km away
  10. 2.6Rat Islands, Aleutian Islands, Alaska · 516 days ago · 35 km deep · 97 km away
  11. 3.0184 km W of Adak, Alaska · 516 days ago · 98 km deep · 47 km away
  12. 4.3174 km WSW of Adak, Alaska · 516 days ago · 27 km deep · 97 km away
  13. 2.3250 km WSW of Adak, Alaska · 515 days ago · 15 km deep · 72 km away
  14. 2.2150 km WSW of Adak, Alaska · 515 days ago · 67 km deep · 83 km away
  15. 1.9147 km WSW of Adak, Alaska · 514 days ago · 18 km deep · 96 km away
  16. 1.6160 km WSW of Adak, Alaska · 514 days ago · 13 km deep · 72 km away
  17. 1.9203 km WSW of Adak, Alaska · 514 days ago · 20 km deep · 70 km away
  18. 2.0291 km W of Adak, Alaska · 514 days ago · 65 km deep · 60 km away
  19. 2.1235 km WSW of Adak, Alaska · 513 days ago · 3 km deep · 48 km away
  20. 2.5269 km WSW of Adak, Alaska · 513 days ago · 47 km deep · 58 km away
  21. 2.0247 km WSW of Adak, Alaska · 513 days ago · 13 km deep · 29 km away
  22. 2.8177 km W of Adak, Alaska · 513 days ago · 140 km deep · 62 km away
  23. 3.0183 km W of Adak, Alaska · 513 days ago · 107 km deep · 52 km away
  24. 2.0Rat Islands, Aleutian Islands, Alaska · 513 days ago · 13 km deep · 100 km away
  25. 2.9214 km W of Adak, Alaska · 512 days ago · 191 km deep · 45 km away
  26. 2.2184 km WSW of Adak, Alaska · 511 days ago · 26 km deep · 76 km away
  27. 3.1274 km W of Adak, Alaska · 510 days ago · 142 km deep · 57 km away
  28. 2.7194 km W of Adak, Alaska · 510 days ago · 113 km deep · 39 km away
  29. 3.0249 km WSW of Adak, Alaska · 509 days ago · 28 km deep · 40 km away
  30. 2.6201 km W of Adak, Alaska · 509 days ago · 105 km deep · 34 km away
  31. 2.1Rat Islands, Aleutian Islands, Alaska · 508 days ago · 67 km deep · 92 km away
  32. 2.9210 km WSW of Adak, Alaska · 507 days ago · 30 km deep · 88 km away
  33. 1.9140 km W of Adak, Alaska · 507 days ago · 11 km deep · 91 km away
  34. 2.0196 km WSW of Adak, Alaska · 507 days ago · 26 km deep · 51 km away
  35. 3.0212 km W of Adak, Alaska · 506 days ago · 121 km deep · 30 km away
  36. 2.8220 km W of Adak, Alaska · 504 days ago · 158 km deep · 37 km away
  37. 1.8157 km W of Adak, Alaska · 504 days ago · 5 km deep · 75 km away
  38. 1.8244 km W of Adak, Alaska · 503 days ago · 63 km deep · 13 km away
  39. 1.6201 km WSW of Adak, Alaska · 503 days ago · 14 km deep · 49 km away
  40. 1.9228 km W of Adak, Alaska · 502 days ago · 91 km deep · 19 km away
  41. 3.1290 km WSW of Adak, Alaska · 502 days ago · 35 km deep · 60 km away
  42. 2.5182 km WSW of Adak, Alaska · 502 days ago · 30 km deep · 83 km away
  43. 2.0186 km WSW of Adak, Alaska · 502 days ago · 21 km deep · 82 km away
  44. 2.1269 km W of Adak, Alaska · 502 days ago · 72 km deep · 40 km away
  45. 2.5Rat Islands, Aleutian Islands, Alaska · 502 days ago · 28 km deep · 93 km away
  46. 1.6152 km WSW of Adak, Alaska · 501 days ago · 26 km deep · 84 km away
  47. 1.7238 km W of Adak, Alaska · 501 days ago · 10 km deep · 7 km away
  48. 1.6221 km W of Adak, Alaska · 501 days ago · 15 km deep · 17 km away
  49. 3.0264 km W of Adak, Alaska · 501 days ago · 78 km deep · 33 km away
  50. 2.0219 km WSW of Adak, Alaska · 500 days ago · 17 km deep · 57 km away
  51. 3.2Rat Islands, Aleutian Islands, Alaska · 500 days ago · 71 km deep · 89 km away
  52. 2.1171 km W of Adak, Alaska · 500 days ago · 24 km deep · 63 km away
  53. 3.3Rat Islands, Aleutian Islands, Alaska · 500 days ago · 41 km deep · 92 km away
  54. 2.7229 km WSW of Adak, Alaska · 499 days ago · 68 km deep · 19 km away
  55. 1.8167 km W of Adak, Alaska · 499 days ago · 10 km deep · 64 km away
  56. 2.0Rat Islands, Aleutian Islands, Alaska · 498 days ago · 62 km deep · 83 km away
  57. 2.7Rat Islands, Aleutian Islands, Alaska · 498 days ago · 10 km deep · 86 km away
  58. 2.0166 km W of Adak, Alaska · 497 days ago · 9 km deep · 66 km away
  59. 2.0Rat Islands, Aleutian Islands, Alaska · 497 days ago · 65 km deep · 81 km away
  60. 2.9216 km W of Adak, Alaska · 496 days ago · 105 km deep · 24 km away

The first 60 of 161.

Before

  1. 3.0Rat Islands, Aleutian Islands, Alaska · 520 days ago · 84 km deep · 82 km away
  2. 2.9214 km W of Adak, Alaska · 520 days ago · 78 km deep · 17 km away
  3. 3.9200 km W of Adak, Alaska · 521 days ago · 91 km deep · 31 km away
  4. 2.3168 km WSW of Adak, Alaska · 521 days ago · 41 km deep · 66 km away
  5. 1.9144 km WSW of Adak, Alaska · 522 days ago · 6 km deep · 97 km away
  6. 1.9226 km W of Adak, Alaska · 522 days ago · 78 km deep · 12 km away
  7. 2.0189 km WSW of Adak, Alaska · 523 days ago · 54 km deep · 43 km away
  8. 2.8250 km W of Adak, Alaska · 524 days ago · 96 km deep · 20 km away
  9. 2.2200 km W of Adak, Alaska · 524 days ago · 72 km deep · 30 km away
  10. 2.6150 km WSW of Adak, Alaska · 525 days ago · 29 km deep · 97 km away
  11. 2.5230 km W of Adak, Alaska · 527 days ago · 94 km deep · 11 km away
  12. 2.0189 km W of Adak, Alaska · 527 days ago · 74 km deep · 42 km away
  13. 1.7198 km WSW of Adak, Alaska · 528 days ago · 20 km deep · 51 km away
  14. 1.7273 km WSW of Adak, Alaska · 528 days ago · 49 km deep · 50 km away
  15. 2.6221 km W of Adak, Alaska · 528 days ago · 98 km deep · 18 km away
  16. 1.9Rat Islands, Aleutian Islands, Alaska · 529 days ago · 9 km deep · 92 km away
  17. 2.2154 km WSW of Adak, Alaska · 529 days ago · 78 km deep · 86 km away
  18. 2.6153 km WSW of Adak, Alaska · 529 days ago · 35 km deep · 97 km away
  19. 2.8297 km WSW of Adak, Alaska · 529 days ago · 27 km deep · 77 km away
  20. 2.8244 km WSW of Adak, Alaska · 530 days ago · 31 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000pwib (also filed as ak0255it9vcp). Read Fri, Oct 2, 2026, 3:44 AM UTC.