Alaska earthquakes

M1.8 earthquake 256 km W of Adak, Alaska

A magnitude 1.8 earthquake struck 256 km W of Adak, Alaska on Sat, Apr 9, 2022, 9:03 AM GMT+12 (21:03 UTC), 14 km (8 mi) below the surface.

A larger quake followed: M6.3 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
1.8 (ML, local (Richter)), micro
Magnitude from
AV
Local time
UTC
2022-04-08 21:03:21 UTC
Depth
13.6 km (8.5 mi), shallow
Epicenter
51.870° N, 179.643° E
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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 1.2 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.38
Depth from
From location
Station coverage gap
267°, poorly surrounded by stations
Stations used
6

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 93 in the 30 days before it.

After

  1. 2.1Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 16 km deep · 93 km away
  2. 2.2Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 8 km deep · 90 km away
  3. 2.1Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 13 km deep · 96 km away
  4. 1.8Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 5 km deep · 88 km away
  5. 1.9Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 13 km deep · 95 km away
  6. 1.8Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 17 km deep · 91 km away
  7. 2.2Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 16 km deep · 97 km away
  8. 1.8Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 5 km deep · 92 km away
  9. 4.2Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 39 km deep · 90 km away
  10. 3.5Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 40 km deep · 86 km away
  11. 2.8Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 25 km deep · 90 km away
  12. 2.7169 km W of Adak, Alaska · 1636 days ago · 100 km deep · 88 km away
  13. 1.8Rat Islands, Aleutian Islands, Alaska · 1636 days ago · 42 km deep · 72 km away
  14. 1.7Rat Islands, Aleutian Islands, Alaska · 1635 days ago · 28 km deep · 76 km away
  15. 2.0Rat Islands, Aleutian Islands, Alaska · 1635 days ago · 25 km deep · 85 km away
  16. 3.1Rat Islands, Aleutian Islands, Alaska · 1635 days ago · 23 km deep · 86 km away
  17. 1.6Rat Islands, Aleutian Islands, Alaska · 1635 days ago · 2 km deep · 86 km away
  18. 2.7Rat Islands, Aleutian Islands, Alaska · 1635 days ago · 163 km deep · 61 km away
  19. 2.9246 km W of Adak, Alaska · 1635 days ago · 181 km deep · 17 km away
  20. 1.7Rat Islands, Aleutian Islands, Alaska · 1634 days ago · 5 km deep · 80 km away
  21. 3.1253 km WSW of Adak, Alaska · 1633 days ago · 55 km deep · 50 km away
  22. 4.6320 km WSW of Adak, Alaska · 1633 days ago · 50 km deep · 83 km away
  23. 3.7Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 35 km deep · 93 km away
  24. 4.2Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 35 km deep · 97 km away
  25. 3.1Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 23 km deep · 95 km away
  26. 2.9229 km WSW of Adak, Alaska · 1633 days ago · 71 km deep · 50 km away
  27. 2.6Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 24 km deep · 91 km away
  28. 3.1Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 22 km deep · 93 km away
  29. 1.8Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 13 km deep · 97 km away
  30. 1.9Rat Islands, Aleutian Islands, Alaska · 1633 days ago · 13 km deep · 96 km away
  31. 2.5275 km W of Adak, Alaska · 1633 days ago · 74 km deep · 34 km away
  32. 1.8296 km WSW of Adak, Alaska · 1632 days ago · 22 km deep · 81 km away
  33. 2.1174 km W of Adak, Alaska · 1632 days ago · 97 km deep · 82 km away
  34. 1.9280 km W of Adak, Alaska · 1632 days ago · 60 km deep · 39 km away
  35. 2.3248 km W of Adak, Alaska · 1632 days ago · 155 km deep · 27 km away
  36. 1.9Rat Islands, Aleutian Islands, Alaska · 1632 days ago · 3 km deep · 85 km away
  37. 1.6Rat Islands, Aleutian Islands, Alaska · 1631 days ago · 5 km deep · 90 km away
  38. 1.7Rat Islands, Aleutian Islands, Alaska · 1631 days ago · 20 km deep · 75 km away
  39. 2.2213 km WSW of Adak, Alaska · 1629 days ago · 26 km deep · 90 km away
  40. 2.0250 km WSW of Adak, Alaska · 1629 days ago · 56 km deep · 50 km away
  41. 2.1Rat Islands, Aleutian Islands, Alaska · 1627 days ago · 7 km deep · 89 km away
  42. 1.9Rat Islands, Aleutian Islands, Alaska · 1627 days ago · 22 km deep · 83 km away
  43. 2.0288 km W of Adak, Alaska · 1627 days ago · 9 km deep · 38 km away
  44. 3.1Rat Islands, Aleutian Islands, Alaska · 1627 days ago · 31 km deep · 98 km away
  45. 1.9Rat Islands, Aleutian Islands, Alaska · 1626 days ago · 53 km deep · 58 km away
  46. 2.0281 km W of Adak, Alaska · 1626 days ago · 56 km deep · 49 km away
  47. 2.4181 km W of Adak, Alaska · 1625 days ago · 86 km deep · 79 km away
  48. 2.8Rat Islands, Aleutian Islands, Alaska · 1624 days ago · 10 km deep · 89 km away
  49. 1.9Rat Islands, Aleutian Islands, Alaska · 1624 days ago · 9 km deep · 82 km away
  50. 3.0Rat Islands, Aleutian Islands, Alaska · 1624 days ago · 10 km deep · 98 km away
  51. 1.7Rat Islands, Aleutian Islands, Alaska · 1624 days ago · 5 km deep · 89 km away
  52. 2.3249 km W of Adak, Alaska · 1623 days ago · 69 km deep · 34 km away
  53. 2.9Rat Islands, Aleutian Islands, Alaska · 1623 days ago · 12 km deep · 100 km away
  54. 2.0199 km WSW of Adak, Alaska · 1623 days ago · 20 km deep · 90 km away
  55. 2.9298 km WSW of Adak, Alaska · 1622 days ago · 24 km deep · 85 km away
  56. 2.8203 km W of Adak, Alaska · 1621 days ago · 133 km deep · 52 km away
  57. 2.9Rat Islands, Aleutian Islands, Alaska · 1621 days ago · 23 km deep · 84 km away
  58. 1.6Rat Islands, Aleutian Islands, Alaska · 1620 days ago · 11 km deep · 90 km away
  59. 3.2Rat Islands, Aleutian Islands, Alaska · 1620 days ago · 137 km deep · 98 km away
  60. 2.7Rat Islands, Aleutian Islands, Alaska · 1620 days ago · 10 km deep · 98 km away

The first 60 of at least 201.

Before

  1. 2.6219 km WSW of Adak, Alaska · 1638 days ago · 56 km deep · 71 km away
  2. 2.8243 km W of Adak, Alaska · 1638 days ago · 199 km deep · 20 km away
  3. 1.9182 km W of Adak, Alaska · 1638 days ago · 109 km deep · 73 km away
  4. 1.6Rat Islands, Aleutian Islands, Alaska · 1638 days ago · 0 km deep · 100 km away
  5. 2.2250 km W of Adak, Alaska · 1638 days ago · 154 km deep · 19 km away
  6. 1.8292 km W of Adak, Alaska · 1638 days ago · 69 km deep · 44 km away
  7. 2.3Rat Islands, Aleutian Islands, Alaska · 1638 days ago · 109 km deep · 75 km away
  8. 2.6242 km WSW of Adak, Alaska · 1638 days ago · 29 km deep · 59 km away
  9. 1.9297 km W of Adak, Alaska · 1639 days ago · 90 km deep · 42 km away
  10. 2.1256 km W of Adak, Alaska · 1639 days ago · 85 km deep · 15 km away
  11. 2.9Rat Islands, Aleutian Islands, Alaska · 1640 days ago · 105 km deep · 87 km away
  12. 1.9233 km WSW of Adak, Alaska · 1641 days ago · 16 km deep · 66 km away
  13. 2.0232 km WSW of Adak, Alaska · 1641 days ago · 17 km deep · 76 km away
  14. 2.0Rat Islands, Aleutian Islands, Alaska · 1642 days ago · 10 km deep · 77 km away
  15. 2.0165 km W of Adak, Alaska · 1642 days ago · 79 km deep · 91 km away
  16. 1.8Rat Islands, Aleutian Islands, Alaska · 1642 days ago · 8 km deep · 84 km away
  17. 2.0252 km WSW of Adak, Alaska · 1642 days ago · 26 km deep · 52 km away
  18. 2.9Rat Islands, Aleutian Islands, Alaska · 1642 days ago · 7 km deep · 97 km away
  19. 3.0Rat Islands, Aleutian Islands, Alaska · 1643 days ago · 10 km deep · 99 km away
  20. 2.5170 km W of Adak, Alaska · 1644 days ago · 13 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av91533481. Read Thu, Oct 1, 2026, 11:25 PM UTC.