Alaska earthquakes

M2.8 earthquake 278 km WSW of Adak, Alaska

A magnitude 2.8 earthquake struck 278 km WSW of Adak, Alaska on Thu, Feb 20, 2025, 5:37 AM GMT+12 (17:37 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.1 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
2025-02-19 17:37:18 UTC
Depth
20.6 km (12.8 mi), shallow
Epicenter
51.115° N, 179.542° 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 · ±0.115 · 10 stations
2.6ML, 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 4.3 km horizontally, 14.3 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
253°, poorly surrounded by stations
Stations used
14

Nearby

Within 100 km, magnitude 1.5 and up: 133 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 3.1Rat Islands, Aleutian Islands, Alaska · 589 days ago · 42 km deep · 57 km away
  2. 3.0223 km W of Adak, Alaska · 589 days ago · 174 km deep · 92 km away
  3. 2.4Rat Islands, Aleutian Islands, Alaska · 587 days ago · 10 km deep · 86 km away
  4. 2.6261 km WSW of Adak, Alaska · 585 days ago · 29 km deep · 17 km away
  5. 2.2217 km WSW of Adak, Alaska · 585 days ago · 62 km deep · 66 km away
  6. 2.1249 km WSW of Adak, Alaska · 584 days ago · 15 km deep · 39 km away
  7. 3.5281 km W of Adak, Alaska · 584 days ago · 64 km deep · 43 km away
  8. 1.9Rat Islands, Aleutian Islands, Alaska · 582 days ago · 13 km deep · 88 km away
  9. 1.8Rat Islands, Aleutian Islands, Alaska · 582 days ago · 34 km deep · 62 km away
  10. 2.0241 km WSW of Adak, Alaska · 582 days ago · 6 km deep · 42 km away
  11. 2.9Rat Islands, Aleutian Islands, Alaska · 581 days ago · 42 km deep · 62 km away
  12. 4.1Rat Islands, Aleutian Islands, Alaska · 581 days ago · 93 km deep · 95 km away
  13. 2.1240 km WSW of Adak, Alaska · 581 days ago · 13 km deep · 46 km away
  14. 2.2274 km WSW of Adak, Alaska · 581 days ago · 20 km deep · 5 km away
  15. 2.1262 km W of Adak, Alaska · 581 days ago · 73 km deep · 55 km away
  16. 1.9180 km WSW of Adak, Alaska · 580 days ago · 21 km deep · 97 km away
  17. 2.1283 km W of Adak, Alaska · 579 days ago · 65 km deep · 56 km away
  18. 3.8Rat Islands, Aleutian Islands, Alaska · 579 days ago · 71 km deep · 91 km away
  19. 2.5236 km W of Adak, Alaska · 579 days ago · 102 km deep · 80 km away
  20. 2.3284 km W of Adak, Alaska · 578 days ago · 84 km deep · 72 km away
  21. 2.6Rat Islands, Aleutian Islands, Alaska · 578 days ago · 87 km deep · 73 km away
  22. 2.5248 km WSW of Adak, Alaska · 577 days ago · 20 km deep · 45 km away
  23. 2.9259 km WSW of Adak, Alaska · 574 days ago · 25 km deep · 20 km away
  24. 2.1257 km WSW of Adak, Alaska · 574 days ago · 21 km deep · 32 km away
  25. 3.4220 km WSW of Adak, Alaska · 574 days ago · 65 km deep · 60 km away
  26. 3.3Rat Islands, Aleutian Islands, Alaska · 574 days ago · 35 km deep · 78 km away
  27. 2.8212 km W of Adak, Alaska · 573 days ago · 97 km deep · 85 km away
  28. 2.8Rat Islands, Aleutian Islands, Alaska · 573 days ago · 71 km deep · 83 km away
  29. 3.3Rat Islands, Aleutian Islands, Alaska · 573 days ago · 54 km deep · 54 km away
  30. 3.9256 km WSW of Adak, Alaska · 572 days ago · 64 km deep · 38 km away
  31. 3.0229 km W of Adak, Alaska · 571 days ago · 19 km deep · 77 km away
  32. 3.1224 km W of Adak, Alaska · 571 days ago · 102 km deep · 75 km away
  33. 2.6207 km WSW of Adak, Alaska · 568 days ago · 72 km deep · 76 km away
  34. 3.1274 km WSW of Adak, Alaska · 566 days ago · 66 km deep · 24 km away
  35. 2.0280 km WSW of Adak, Alaska · 566 days ago · 33 km deep · 15 km away
  36. 2.3Rat Islands, Aleutian Islands, Alaska · 566 days ago · 73 km deep · 84 km away
  37. 2.2255 km W of Adak, Alaska · 566 days ago · 68 km deep · 55 km away
  38. 2.7243 km WSW of Adak, Alaska · 565 days ago · 35 km deep · 46 km away
  39. 2.6255 km W of Adak, Alaska · 565 days ago · 20 km deep · 48 km away
  40. 2.5262 km WSW of Adak, Alaska · 564 days ago · 35 km deep · 16 km away
  41. 2.3232 km WSW of Adak, Alaska · 564 days ago · 58 km deep · 53 km away
  42. 2.3259 km W of Adak, Alaska · 563 days ago · 81 km deep · 64 km away
  43. 3.0186 km WSW of Adak, Alaska · 563 days ago · 10 km deep · 92 km away
  44. 2.9239 km WSW of Adak, Alaska · 559 days ago · 26 km deep · 41 km away
  45. 2.4231 km W of Adak, Alaska · 558 days ago · 98 km deep · 81 km away
  46. 3.5228 km WSW of Adak, Alaska · 558 days ago · 10 km deep · 62 km away
  47. 1.7227 km WSW of Adak, Alaska · 557 days ago · 57 km deep · 52 km away
  48. 2.8Rat Islands, Aleutian Islands, Alaska · 557 days ago · 16 km deep · 52 km away
  49. 2.1240 km WSW of Adak, Alaska · 557 days ago · 14 km deep · 46 km away
  50. 3.9Rat Islands, Aleutian Islands, Alaska · 556 days ago · 54 km deep · 54 km away
  51. 2.2211 km WSW of Adak, Alaska · 555 days ago · 14 km deep · 73 km away
  52. 2.6196 km W of Adak, Alaska · 555 days ago · 100 km deep · 99 km away
  53. 2.6Rat Islands, Aleutian Islands, Alaska · 555 days ago · 72 km deep · 77 km away
  54. 2.1Rat Islands, Aleutian Islands, Alaska · 555 days ago · 96 km deep · 100 km away
  55. 1.6282 km W of Adak, Alaska · 554 days ago · 22 km deep · 44 km away
  56. 2.7224 km W of Adak, Alaska · 554 days ago · 104 km deep · 76 km away
  57. 1.8259 km WSW of Adak, Alaska · 554 days ago · 20 km deep · 20 km away
  58. 3.2184 km WSW of Adak, Alaska · 554 days ago · 35 km deep · 97 km away
  59. 2.0191 km WSW of Adak, Alaska · 554 days ago · 51 km deep · 87 km away
  60. 2.9Rat Islands, Aleutian Islands, Alaska · 554 days ago · 106 km deep · 100 km away

The first 60 of 133.

Before

  1. 2.8253 km WSW of Adak, Alaska · 590 days ago · 10 km deep · 46 km away
  2. 2.3189 km WSW of Adak, Alaska · 590 days ago · 21 km deep · 94 km away
  3. 3.0287 km W of Adak, Alaska · 590 days ago · 64 km deep · 44 km away
  4. 2.4206 km WSW of Adak, Alaska · 591 days ago · 60 km deep · 78 km away
  5. 2.1Rat Islands, Aleutian Islands, Alaska · 592 days ago · 6 km deep · 75 km away
  6. 2.4220 km W of Adak, Alaska · 592 days ago · 95 km deep · 81 km away
  7. 3.3Rat Islands, Aleutian Islands, Alaska · 593 days ago · 27 km deep · 23 km away
  8. 2.6227 km W of Adak, Alaska · 593 days ago · 10 km deep · 83 km away
  9. 1.8269 km WSW of Adak, Alaska · 594 days ago · 13 km deep · 11 km away
  10. 1.8Rat Islands, Aleutian Islands, Alaska · 595 days ago · 13 km deep · 72 km away
  11. 1.9194 km WSW of Adak, Alaska · 595 days ago · 52 km deep · 87 km away
  12. 3.6233 km WSW of Adak, Alaska · 595 days ago · 19 km deep · 46 km away
  13. 2.0Rat Islands, Aleutian Islands, Alaska · 596 days ago · 7 km deep · 81 km away
  14. 2.9Rat Islands, Aleutian Islands, Alaska · 597 days ago · 67 km deep · 59 km away
  15. 3.3Rat Islands, Aleutian Islands, Alaska · 602 days ago · 35 km deep · 93 km away
  16. 3.0Rat Islands, Aleutian Islands, Alaska · 603 days ago · 51 km deep · 58 km away
  17. 1.9283 km WSW of Adak, Alaska · 604 days ago · 31 km deep · 11 km away
  18. 2.3293 km W of Adak, Alaska · 604 days ago · 59 km deep · 52 km away
  19. 3.1246 km WSW of Adak, Alaska · 605 days ago · 59 km deep · 40 km away
  20. 2.2Rat Islands, Aleutian Islands, Alaska · 605 days ago · 54 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000pzcb (also filed as ak0252az7p75). Read Fri, Oct 2, 2026, 1:00 AM UTC.