Alaska earthquakes

M3.0 earthquake 163 km WSW of Adak, Alaska

A magnitude 3.0 earthquake struck 163 km WSW of Adak, Alaska on Wed, Feb 22, 2023, 8:58 PM HAST (06:58 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.0 121 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
3.0 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-02-23 06:58:46 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.223° N, 178.742° 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
3.0ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
2.8ML, 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 2.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
212°, poorly surrounded by stations
Stations used
20

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 181 in the 30 days before it.

After

  1. 4.1192 km WSW of Adak, Alaska · 1318 days ago · 35 km deep · 29 km away
  2. 3.3Andreanof Islands, Aleutian Islands, Alaska · 1318 days ago · 30 km deep · 26 km away
  3. 1.792 km W of Adak, Alaska · 1318 days ago · 5 km deep · 89 km away
  4. 2.7145 km WSW of Adak, Alaska · 1317 days ago · 10 km deep · 43 km away
  5. 1.693 km W of Adak, Alaska · 1316 days ago · 3 km deep · 88 km away
  6. 2.093 km W of Adak, Alaska · 1316 days ago · 5 km deep · 86 km away
  7. 2.394 km W of Adak, Alaska · 1316 days ago · 5 km deep · 89 km away
  8. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1316 days ago · 5 km deep · 91 km away
  9. 2.293 km W of Adak, Alaska · 1316 days ago · 7 km deep · 88 km away
  10. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1316 days ago · 3 km deep · 87 km away
  11. 1.993 km W of Adak, Alaska · 1316 days ago · 4 km deep · 88 km away
  12. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1316 days ago · 3 km deep · 86 km away
  13. 2.293 km W of Adak, Alaska · 1316 days ago · 5 km deep · 88 km away
  14. 5.0121 km WSW of Adak, Alaska · 1315 days ago · 49 km deep · 45 km away
  15. 2.093 km W of Adak, Alaska · 1315 days ago · 2 km deep · 87 km away
  16. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1315 days ago · 4 km deep · 90 km away
  17. 1.994 km W of Adak, Alaska · 1315 days ago · 3 km deep · 87 km away
  18. 2.0122 km WSW of Adak, Alaska · 1315 days ago · 42 km deep · 42 km away
  19. 2.092 km W of Adak, Alaska · 1314 days ago · 6 km deep · 88 km away
  20. 1.889 km W of Adak, Alaska · 1313 days ago · 7 km deep · 91 km away
  21. 1.689 km W of Adak, Alaska · 1313 days ago · 5 km deep · 90 km away
  22. 2.2123 km WSW of Adak, Alaska · 1313 days ago · 26 km deep · 39 km away
  23. 2.6Andreanof Islands, Aleutian Islands, Alaska · 1313 days ago · 10 km deep · 89 km away
  24. 1.791 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  25. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1313 days ago · 5 km deep · 88 km away
  26. 1.591 km W of Adak, Alaska · 1313 days ago · 7 km deep · 90 km away
  27. 2.192 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  28. 3.590 km W of Adak, Alaska · 1313 days ago · 8 km deep · 90 km away
  29. 3.491 km W of Adak, Alaska · 1313 days ago · 9 km deep · 90 km away
  30. 2.792 km W of Adak, Alaska · 1313 days ago · 10 km deep · 91 km away
  31. 1.791 km W of Adak, Alaska · 1313 days ago · 4 km deep · 89 km away
  32. 1.791 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  33. 1.692 km W of Adak, Alaska · 1313 days ago · 6 km deep · 88 km away
  34. 1.691 km W of Adak, Alaska · 1313 days ago · 7 km deep · 89 km away
  35. 1.892 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  36. 1.792 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  37. 1.691 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  38. 1.791 km W of Adak, Alaska · 1313 days ago · 5 km deep · 89 km away
  39. 1.592 km W of Adak, Alaska · 1313 days ago · 3 km deep · 88 km away
  40. 1.592 km W of Adak, Alaska · 1313 days ago · 5 km deep · 88 km away
  41. 1.690 km W of Adak, Alaska · 1313 days ago · 6 km deep · 91 km away
  42. 2.692 km W of Adak, Alaska · 1313 days ago · 9 km deep · 89 km away
  43. 1.692 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  44. 1.692 km W of Adak, Alaska · 1313 days ago · 4 km deep · 88 km away
  45. 1.692 km W of Adak, Alaska · 1313 days ago · 4 km deep · 88 km away
  46. 1.692 km W of Adak, Alaska · 1313 days ago · 3 km deep · 88 km away
  47. 2.292 km W of Adak, Alaska · 1313 days ago · 4 km deep · 88 km away
  48. 1.792 km W of Adak, Alaska · 1313 days ago · 4 km deep · 88 km away
  49. 2.291 km W of Adak, Alaska · 1313 days ago · 7 km deep · 89 km away
  50. 1.892 km W of Adak, Alaska · 1313 days ago · 6 km deep · 90 km away
  51. 1.791 km W of Adak, Alaska · 1313 days ago · 4 km deep · 89 km away
  52. 1.793 km W of Adak, Alaska · 1313 days ago · 5 km deep · 88 km away
  53. 1.692 km W of Adak, Alaska · 1313 days ago · 6 km deep · 89 km away
  54. 1.992 km W of Adak, Alaska · 1313 days ago · 3 km deep · 88 km away
  55. 2.292 km W of Adak, Alaska · 1313 days ago · 4 km deep · 88 km away
  56. 3.290 km W of Adak, Alaska · 1313 days ago · 12 km deep · 90 km away
  57. 2.593 km W of Adak, Alaska · 1313 days ago · 11 km deep · 93 km away
  58. 1.593 km W of Adak, Alaska · 1312 days ago · 4 km deep · 87 km away
  59. 1.592 km W of Adak, Alaska · 1312 days ago · 6 km deep · 89 km away
  60. 3.0229 km WSW of Adak, Alaska · 1312 days ago · 72 km deep · 86 km away

The first 60 of at least 201.

Before

  1. 1.692 km W of Adak, Alaska · 1319 days ago · 4 km deep · 88 km away
  2. 1.694 km W of Adak, Alaska · 1319 days ago · 3 km deep · 87 km away
  3. 2.097 km W of Adak, Alaska · 1319 days ago · 9 km deep · 86 km away
  4. 3.2132 km WSW of Adak, Alaska · 1319 days ago · 35 km deep · 34 km away
  5. 1.594 km W of Adak, Alaska · 1319 days ago · -2 km deep · 87 km away
  6. 1.991 km W of Adak, Alaska · 1319 days ago · 4 km deep · 89 km away
  7. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1319 days ago · 4 km deep · 89 km away
  8. 1.890 km W of Adak, Alaska · 1319 days ago · 5 km deep · 90 km away
  9. 1.692 km W of Adak, Alaska · 1320 days ago · -2 km deep · 89 km away
  10. 1.693 km W of Adak, Alaska · 1320 days ago · 7 km deep · 88 km away
  11. 2.8179 km WSW of Adak, Alaska · 1320 days ago · 35 km deep · 17 km away
  12. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1320 days ago · 6 km deep · 90 km away
  13. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1320 days ago · 6 km deep · 89 km away
  14. 1.690 km W of Adak, Alaska · 1321 days ago · 7 km deep · 90 km away
  15. 1.695 km W of Adak, Alaska · 1321 days ago · -2 km deep · 87 km away
  16. 3.6148 km WSW of Adak, Alaska · 1321 days ago · 60 km deep · 27 km away
  17. 1.793 km W of Adak, Alaska · 1321 days ago · 4 km deep · 88 km away
  18. 1.889 km W of Adak, Alaska · 1321 days ago · 7 km deep · 90 km away
  19. 1.790 km W of Adak, Alaska · 1322 days ago · 6 km deep · 90 km away
  20. 2.5188 km W of Adak, Alaska · 1322 days ago · 91 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000jgnw (also filed as ak0232hexvfl). Read Sat, Oct 3, 2026, 7:07 PM UTC.