Alaska earthquakes

M2.8 earthquake 297 km WSW of Adak, Alaska

A magnitude 2.8 earthquake struck 297 km WSW of Adak, Alaska on Mon, Apr 21, 2025, 7:16 AM GMT+12 (19:16 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M4.2 Rat Islands, Aleutian Islands, 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
2.8 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-04-20 19:16:41 UTC
Depth
27.1 km (16.8 mi), shallow
Epicenter
51.131° N, 179.245° 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
2.8ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 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 7.0 km horizontally, 12.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
260°, poorly surrounded by stations
Stations used
15

Nearby

Within 100 km, magnitude 1.5 and up: 96 in the 60 days after this one and 84 in the 30 days before it.

After

  1. 1.9Rat Islands, Aleutian Islands, Alaska · 529 days ago · 9 km deep · 42 km away
  2. 2.6221 km W of Adak, Alaska · 529 days ago · 98 km deep · 94 km away
  3. 1.9Rat Islands, Aleutian Islands, Alaska · 528 days ago · 16 km deep · 42 km away
  4. 1.7273 km WSW of Adak, Alaska · 528 days ago · 49 km deep · 27 km away
  5. 1.7198 km WSW of Adak, Alaska · 528 days ago · 20 km deep · 100 km away
  6. 2.5230 km W of Adak, Alaska · 528 days ago · 94 km deep · 84 km away
  7. 2.8250 km W of Adak, Alaska · 524 days ago · 96 km deep · 63 km away
  8. 1.9Rat Islands, Aleutian Islands, Alaska · 523 days ago · 39 km deep · 93 km away
  9. 1.9226 km W of Adak, Alaska · 523 days ago · 78 km deep · 87 km away
  10. 2.9214 km W of Adak, Alaska · 520 days ago · 78 km deep · 91 km away
  11. 3.0Rat Islands, Aleutian Islands, Alaska · 520 days ago · 84 km deep · 65 km away
  12. 2.5231 km W of Adak, Alaska · 520 days ago · 79 km deep · 77 km away
  13. 2.1244 km W of Adak, Alaska · 519 days ago · 83 km deep · 75 km away
  14. 3.2220 km W of Adak, Alaska · 519 days ago · 77 km deep · 83 km away
  15. 3.4Rat Islands, Aleutian Islands, Alaska · 518 days ago · 105 km deep · 88 km away
  16. 3.8Rat Islands, Aleutian Islands, Alaska · 517 days ago · 74 km deep · 67 km away
  17. 2.6Rat Islands, Aleutian Islands, Alaska · 516 days ago · 35 km deep · 30 km away
  18. 2.3250 km WSW of Adak, Alaska · 516 days ago · 15 km deep · 61 km away
  19. 1.8Rat Islands, Aleutian Islands, Alaska · 515 days ago · 44 km deep · 59 km away
  20. 2.0291 km W of Adak, Alaska · 514 days ago · 65 km deep · 48 km away
  21. 2.1235 km WSW of Adak, Alaska · 514 days ago · 3 km deep · 64 km away
  22. 2.5269 km WSW of Adak, Alaska · 513 days ago · 47 km deep · 29 km away
  23. 2.0247 km WSW of Adak, Alaska · 513 days ago · 13 km deep · 51 km away
  24. 2.0Rat Islands, Aleutian Islands, Alaska · 513 days ago · 13 km deep · 67 km away
  25. 3.1274 km W of Adak, Alaska · 511 days ago · 142 km deep · 86 km away
  26. 3.0249 km WSW of Adak, Alaska · 509 days ago · 28 km deep · 48 km away
  27. 2.1Rat Islands, Aleutian Islands, Alaska · 508 days ago · 67 km deep · 63 km away
  28. 1.8244 km W of Adak, Alaska · 504 days ago · 63 km deep · 65 km away
  29. 1.6201 km WSW of Adak, Alaska · 503 days ago · 14 km deep · 96 km away
  30. 2.0Rat Islands, Aleutian Islands, Alaska · 503 days ago · 93 km deep · 87 km away
  31. 1.9228 km W of Adak, Alaska · 503 days ago · 91 km deep · 91 km away
  32. 3.5Rat Islands, Aleutian Islands, Alaska · 502 days ago · 10 km deep · 33 km away
  33. 3.1290 km WSW of Adak, Alaska · 502 days ago · 35 km deep · 29 km away
  34. 2.1269 km W of Adak, Alaska · 502 days ago · 72 km deep · 60 km away
  35. 2.5Rat Islands, Aleutian Islands, Alaska · 502 days ago · 28 km deep · 19 km away
  36. 2.2287 km WSW of Adak, Alaska · 501 days ago · 23 km deep · 53 km away
  37. 1.6Rat Islands, Aleutian Islands, Alaska · 501 days ago · 6 km deep · 39 km away
  38. 1.7238 km W of Adak, Alaska · 501 days ago · 10 km deep · 70 km away
  39. 1.6221 km W of Adak, Alaska · 501 days ago · 15 km deep · 93 km away
  40. 3.0264 km W of Adak, Alaska · 501 days ago · 78 km deep · 58 km away
  41. 2.1Rat Islands, Aleutian Islands, Alaska · 501 days ago · 108 km deep · 90 km away
  42. 2.0219 km WSW of Adak, Alaska · 501 days ago · 17 km deep · 82 km away
  43. 3.2Rat Islands, Aleutian Islands, Alaska · 500 days ago · 71 km deep · 67 km away
  44. 3.3Rat Islands, Aleutian Islands, Alaska · 500 days ago · 41 km deep · 45 km away
  45. 2.7229 km WSW of Adak, Alaska · 499 days ago · 68 km deep · 70 km away
  46. 2.0Rat Islands, Aleutian Islands, Alaska · 498 days ago · 62 km deep · 54 km away
  47. 2.7Rat Islands, Aleutian Islands, Alaska · 498 days ago · 10 km deep · 56 km away
  48. 4.0Rat Islands, Aleutian Islands, Alaska · 497 days ago · 77 km deep · 72 km away
  49. 2.0Rat Islands, Aleutian Islands, Alaska · 497 days ago · 65 km deep · 65 km away
  50. 2.9Rat Islands, Aleutian Islands, Alaska · 497 days ago · 117 km deep · 94 km away
  51. 2.8255 km W of Adak, Alaska · 496 days ago · 63 km deep · 56 km away
  52. 2.3Rat Islands, Aleutian Islands, Alaska · 496 days ago · 26 km deep · 44 km away
  53. 2.9239 km WSW of Adak, Alaska · 495 days ago · 35 km deep · 67 km away
  54. 3.0Rat Islands, Aleutian Islands, Alaska · 494 days ago · 46 km deep · 46 km away
  55. 2.6250 km WSW of Adak, Alaska · 494 days ago · 49 km deep · 47 km away
  56. 2.2284 km W of Adak, Alaska · 493 days ago · 84 km deep · 62 km away
  57. 2.1Rat Islands, Aleutian Islands, Alaska · 493 days ago · 96 km deep · 86 km away
  58. 2.5Rat Islands, Aleutian Islands, Alaska · 493 days ago · 79 km deep · 72 km away
  59. 1.9Rat Islands, Aleutian Islands, Alaska · 492 days ago · 61 km deep · 58 km away
  60. 1.8259 km W of Adak, Alaska · 492 days ago · 4 km deep · 94 km away

The first 60 of 96.

Before

  1. 2.8244 km WSW of Adak, Alaska · 531 days ago · 31 km deep · 55 km away
  2. 2.6Rat Islands, Aleutian Islands, Alaska · 531 days ago · 35 km deep · 74 km away
  3. 2.9213 km WSW of Adak, Alaska · 531 days ago · 66 km deep · 85 km away
  4. 2.2205 km WSW of Adak, Alaska · 532 days ago · 24 km deep · 93 km away
  5. 2.2270 km W of Adak, Alaska · 532 days ago · 70 km deep · 53 km away
  6. 2.6275 km W of Adak, Alaska · 533 days ago · 94 km deep · 69 km away
  7. 2.8Rat Islands, Aleutian Islands, Alaska · 533 days ago · 10 km deep · 81 km away
  8. 2.8283 km W of Adak, Alaska · 534 days ago · 158 km deep · 84 km away
  9. 2.6Rat Islands, Aleutian Islands, Alaska · 534 days ago · 104 km deep · 82 km away
  10. 2.1245 km WSW of Adak, Alaska · 534 days ago · 13 km deep · 60 km away
  11. 2.0240 km W of Adak, Alaska · 534 days ago · 78 km deep · 74 km away
  12. 2.5218 km WSW of Adak, Alaska · 534 days ago · 28 km deep · 81 km away
  13. 2.9Rat Islands, Aleutian Islands, Alaska · 534 days ago · 46 km deep · 42 km away
  14. 2.2Rat Islands, Aleutian Islands, Alaska · 535 days ago · 99 km deep · 88 km away
  15. 1.9215 km WSW of Adak, Alaska · 535 days ago · 10 km deep · 84 km away
  16. 2.1219 km W of Adak, Alaska · 535 days ago · 87 km deep · 89 km away
  17. 2.8291 km WSW of Adak, Alaska · 535 days ago · 52 km deep · 19 km away
  18. 1.6263 km W of Adak, Alaska · 536 days ago · 5 km deep · 83 km away
  19. 3.3247 km WSW of Adak, Alaska · 536 days ago · 65 km deep · 54 km away
  20. 1.9Rat Islands, Aleutian Islands, Alaska · 536 days ago · 66 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000pxcv (also filed as ak025528ix6c). Read Fri, Oct 2, 2026, 9:43 AM UTC.