Alaska earthquakes

M2.9 earthquake 63 km SE of Adak, Alaska

A magnitude 2.9 earthquake struck 63 km SE of Adak, Alaska on Wed, Aug 23, 2023, 10:11 AM HADT (19:11 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.0 44 km SSE 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
2.9 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-08-23 19:11:04 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.416° N, 176.082° 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
2.9ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 18 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 3.3 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
216°, poorly surrounded by stations
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: 186 in the 60 days after this one and 120 in the 30 days before it.

After

  1. 1.682 km WSW of Atka, Alaska · 1134 days ago · 67 km deep · 79 km away
  2. 1.759 km SE of Adak, Alaska · 1134 days ago · 26 km deep · 11 km away
  3. 1.625 km S of Adak, Alaska · 1134 days ago · 68 km deep · 45 km away
  4. 1.626 km NNE of Adak, Alaska · 1134 days ago · 101 km deep · 81 km away
  5. 1.889 km SW of Atka, Alaska · 1134 days ago · 26 km deep · 73 km away
  6. 1.769 km SSW of Adak, Alaska · 1134 days ago · 30 km deep · 75 km away
  7. 1.580 km SSE of Adak, Alaska · 1134 days ago · 26 km deep · 29 km away
  8. 1.861 km SSE of Adak, Alaska · 1133 days ago · 15 km deep · 24 km away
  9. 2.037 km ESE of Adak, Alaska · 1132 days ago · 62 km deep · 37 km away
  10. 1.640 km S of Adak, Alaska · 1132 days ago · 33 km deep · 42 km away
  11. 1.858 km ENE of Adak, Alaska · 1132 days ago · 93 km deep · 66 km away
  12. 2.760 km SE of Adak, Alaska · 1132 days ago · 35 km deep · 10 km away
  13. 1.841 km W of Adak, Alaska · 1132 days ago · 71 km deep · 91 km away
  14. 1.883 km ESE of Adak, Alaska · 1132 days ago · 24 km deep · 45 km away
  15. 1.848 km SE of Adak, Alaska · 1131 days ago · 24 km deep · 16 km away
  16. 2.858 km SE of Adak, Alaska · 1131 days ago · 35 km deep · 13 km away
  17. 2.9Andreanof Islands, Aleutian Islands, Alaska · 1131 days ago · 10 km deep · 35 km away
  18. 1.638 km SSE of Adak, Alaska · 1131 days ago · 34 km deep · 27 km away
  19. 1.842 km SSE of Adak, Alaska · 1130 days ago · 46 km deep · 23 km away
  20. 2.169 km ESE of Adak, Alaska · 1130 days ago · 24 km deep · 26 km away
  21. 2.3119 km SSW of Atka, Alaska · 1130 days ago · 36 km deep · 80 km away
  22. 1.949 km S of Adak, Alaska · 1129 days ago · 32 km deep · 33 km away
  23. 1.870 km SSE of Adak, Alaska · 1129 days ago · 20 km deep · 22 km away
  24. 1.869 km SSE of Adak, Alaska · 1129 days ago · 7 km deep · 20 km away
  25. 1.751 km SE of Adak, Alaska · 1129 days ago · 24 km deep · 13 km away
  26. 2.6Andreanof Islands, Aleutian Islands, Alaska · 1129 days ago · 35 km deep · 56 km away
  27. 1.969 km SSE of Adak, Alaska · 1129 days ago · 23 km deep · 19 km away
  28. 2.718 km S of Adak, Alaska · 1129 days ago · 82 km deep · 50 km away
  29. 1.857 km SSE of Adak, Alaska · 1128 days ago · 21 km deep · 19 km away
  30. 3.457 km SE of Adak, Alaska · 1128 days ago · 35 km deep · 10 km away
  31. 1.861 km SE of Adak, Alaska · 1128 days ago · 29 km deep · 10 km away
  32. 2.566 km SSW of Adak, Alaska · 1127 days ago · 40 km deep · 62 km away
  33. 1.951 km S of Adak, Alaska · 1126 days ago · 24 km deep · 40 km away
  34. 2.053 km S of Adak, Alaska · 1126 days ago · 26 km deep · 36 km away
  35. 2.054 km WSW of Adak, Alaska · 1126 days ago · 76 km deep · 98 km away
  36. 1.755 km S of Adak, Alaska · 1126 days ago · 13 km deep · 31 km away
  37. 1.532 km SSW of Adak, Alaska · 1125 days ago · 41 km deep · 51 km away
  38. 2.677 km SW of Adak, Alaska · 1125 days ago · 35 km deep · 95 km away
  39. 2.655 km SE of Adak, Alaska · 1125 days ago · 35 km deep · 12 km away
  40. 2.144 km E of Adak, Alaska · 1125 days ago · 70 km deep · 49 km away
  41. 3.365 km SSE of Adak, Alaska · 1124 days ago · 35 km deep · 19 km away
  42. 2.790 km SSE of Adak, Alaska · 1124 days ago · 10 km deep · 37 km away
  43. 1.953 km SSW of Adak, Alaska · 1124 days ago · 49 km deep · 66 km away
  44. 1.868 km SW of Adak, Alaska · 1124 days ago · 48 km deep · 94 km away
  45. 2.086 km SW of Adak, Alaska · 1123 days ago · 26 km deep · 98 km away
  46. 2.770 km SSE of Adak, Alaska · 1123 days ago · 35 km deep · 28 km away
  47. 1.751 km SW of Adak, Alaska · 1123 days ago · 44 km deep · 69 km away
  48. 3.244 km S of Adak, Alaska · 1123 days ago · 35 km deep · 32 km away
  49. 3.268 km SW of Adak, Alaska · 1122 days ago · 65 km deep · 94 km away
  50. 1.738 km SE of Adak, Alaska · 1122 days ago · 87 km deep · 26 km away
  51. 3.081 km SE of Adak, Alaska · 1121 days ago · 35 km deep · 27 km away
  52. 1.979 km ESE of Adak, Alaska · 1121 days ago · 26 km deep · 30 km away
  53. 1.993 km S of Adak, Alaska · 1121 days ago · 26 km deep · 64 km away
  54. 1.973 km ESE of Adak, Alaska · 1121 days ago · 34 km deep · 36 km away
  55. 1.542 km S of Adak, Alaska · 1120 days ago · 35 km deep · 36 km away
  56. 2.053 km NE of Adak, Alaska · 1120 days ago · 132 km deep · 87 km away
  57. 1.780 km SE of Adak, Alaska · 1120 days ago · 20 km deep · 23 km away
  58. 1.524 km SSW of Adak, Alaska · 1120 days ago · 65 km deep · 57 km away
  59. 2.048 km SSW of Adak, Alaska · 1119 days ago · 39 km deep · 62 km away
  60. 1.719 km WSW of Adak, Alaska · 1119 days ago · 77 km deep · 72 km away

The first 60 of 186.

Before

  1. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1134 days ago · 26 km deep · 11 km away
  2. 1.9146 km SSE of Adak, Alaska · 1135 days ago · 26 km deep · 85 km away
  3. 1.686 km SW of Adak, Alaska · 1135 days ago · 41 km deep · 97 km away
  4. 1.548 km S of Adak, Alaska · 1135 days ago · 31 km deep · 31 km away
  5. 1.862 km SE of Adak, Alaska · 1135 days ago · 26 km deep · 11 km away
  6. 2.076 km W of Atka, Alaska · 1136 days ago · 98 km deep · 98 km away
  7. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1137 days ago · 16 km deep · 30 km away
  8. 2.063 km SW of Atka, Alaska · 1137 days ago · 52 km deep · 93 km away
  9. 1.654 km SSE of Adak, Alaska · 1137 days ago · 29 km deep · 11 km away
  10. 3.4Andreanof Islands, Aleutian Islands, Alaska · 1137 days ago · 38 km deep · 61 km away
  11. 1.652 km SE of Adak, Alaska · 1137 days ago · 24 km deep · 11 km away
  12. 2.860 km SE of Adak, Alaska · 1138 days ago · 35 km deep · 11 km away
  13. 1.753 km SSE of Adak, Alaska · 1138 days ago · 25 km deep · 18 km away
  14. 2.899 km ESE of Adak, Alaska · 1138 days ago · 35 km deep · 55 km away
  15. 3.7Andreanof Islands, Aleutian Islands, Alaska · 1138 days ago · 35 km deep · 57 km away
  16. 1.654 km WSW of Adak, Alaska · 1138 days ago · 72 km deep · 99 km away
  17. 1.552 km SSW of Adak, Alaska · 1139 days ago · 32 km deep · 56 km away
  18. 1.978 km ESE of Adak, Alaska · 1139 days ago · 26 km deep · 30 km away
  19. 2.458 km E of Adak, Alaska · 1139 days ago · 196 km deep · 52 km away
  20. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1139 days ago · 14 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kttc (also filed as ak023asyo5jf). Read Thu, Oct 1, 2026, 4:37 AM UTC.