Alaska earthquakes

M2.5 earthquake 27 km S of Adak, Alaska

A magnitude 2.5 earthquake struck 27 km S of Adak, Alaska on Wed, Oct 4, 2023, 11:26 AM HADT (20:26 UTC), 66 km (41 mi) below the surface.

A larger quake followed: M5.0 46 km SSW 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
2.5 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-10-04 20:26:49 UTC
Depth
66.4 km (41.3 mi), shallow
Epicenter
51.632° N, 176.561° 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
2.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 stations
2.2ML, 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 6.3 km horizontally, 10.6 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
210°, poorly surrounded by stations
Stations used
17

Nearby

Within 100 km, magnitude 1.5 and up: 180 in the 60 days after this one and 103 in the 30 days before it.

After

  1. 1.894 km WSW of Adak, Alaska · 1096 days ago · 13 km deep · 91 km away
  2. 1.958 km SE of Adak, Alaska · 1096 days ago · 32 km deep · 40 km away
  3. 1.850 km S of Adak, Alaska · 1096 days ago · 24 km deep · 23 km away
  4. 1.693 km WSW of Adak, Alaska · 1096 days ago · 36 km deep · 90 km away
  5. 1.770 km SSW of Adak, Alaska · 1096 days ago · 32 km deep · 49 km away
  6. 1.637 km SSE of Adak, Alaska · 1096 days ago · 41 km deep · 15 km away
  7. 1.767 km SSE of Adak, Alaska · 1095 days ago · 24 km deep · 40 km away
  8. 1.593 km WSW of Adak, Alaska · 1095 days ago · 23 km deep · 91 km away
  9. 1.569 km WSW of Adak, Alaska · 1095 days ago · 28 km deep · 66 km away
  10. 1.778 km SW of Adak, Alaska · 1094 days ago · 35 km deep · 73 km away
  11. 1.860 km SSW of Adak, Alaska · 1093 days ago · 51 km deep · 44 km away
  12. 1.767 km WSW of Adak, Alaska · 1093 days ago · 16 km deep · 68 km away
  13. 1.888 km WSW of Adak, Alaska · 1093 days ago · 13 km deep · 85 km away
  14. 2.033 km SE of Adak, Alaska · 1093 days ago · 69 km deep · 24 km away
  15. 2.152 km ENE of Adak, Alaska · 1092 days ago · 122 km deep · 67 km away
  16. 1.741 km SSW of Adak, Alaska · 1092 days ago · 44 km deep · 20 km away
  17. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1092 days ago · 26 km deep · 83 km away
  18. 1.594 km WSW of Adak, Alaska · 1092 days ago · 13 km deep · 91 km away
  19. 1.646 km SSE of Adak, Alaska · 1091 days ago · 36 km deep · 20 km away
  20. 1.8Andreanof Islands, Aleutian Islands, Alaska · 1091 days ago · 26 km deep · 40 km away
  21. 1.550 km S of Adak, Alaska · 1091 days ago · 24 km deep · 24 km away
  22. 2.841 km NE of Adak, Alaska · 1091 days ago · 131 km deep · 63 km away
  23. 2.158 km ENE of Adak, Alaska · 1091 days ago · 165 km deep · 67 km away
  24. 2.030 km WNW of Adak, Alaska · 1091 days ago · 168 km deep · 51 km away
  25. 1.882 km ESE of Adak, Alaska · 1091 days ago · 51 km deep · 67 km away
  26. 2.553 km NNE of Adak, Alaska · 1090 days ago · 161 km deep · 76 km away
  27. 1.580 km ESE of Adak, Alaska · 1090 days ago · 28 km deep · 74 km away
  28. 2.182 km ENE of Adak, Alaska · 1090 days ago · 100 km deep · 93 km away
  29. 2.095 km ESE of Adak, Alaska · 1090 days ago · 38 km deep · 85 km away
  30. 2.7103 km SW of Adak, Alaska · 1089 days ago · 35 km deep · 92 km away
  31. 3.5107 km SW of Adak, Alaska · 1088 days ago · 43 km deep · 96 km away
  32. 1.519 km NE of Adak, Alaska · 1088 days ago · 10 km deep · 41 km away
  33. 2.08 km NE of Adak, Alaska · 1088 days ago · 2 km deep · 32 km away
  34. 2.565 km E of Adak, Alaska · 1087 days ago · 69 km deep · 63 km away
  35. 2.163 km SW of Adak, Alaska · 1087 days ago · 59 km deep · 53 km away
  36. 2.230 km SE of Adak, Alaska · 1087 days ago · 64 km deep · 18 km away
  37. 1.932 km SW of Adak, Alaska · 1087 days ago · 72 km deep · 24 km away
  38. 2.764 km E of Adak, Alaska · 1087 days ago · 145 km deep · 67 km away
  39. 1.968 km SSW of Adak, Alaska · 1086 days ago · 37 km deep · 44 km away
  40. 2.452 km ESE of Adak, Alaska · 1086 days ago · 110 km deep · 47 km away
  41. 2.585 km SW of Adak, Alaska · 1086 days ago · 35 km deep · 74 km away
  42. 2.780 km SSE of Adak, Alaska · 1085 days ago · 35 km deep · 55 km away
  43. 2.793 km SSE of Adak, Alaska · 1085 days ago · 10 km deep · 67 km away
  44. 1.855 km SW of Adak, Alaska · 1085 days ago · 44 km deep · 41 km away
  45. 2.735 km SSE of Adak, Alaska · 1084 days ago · 45 km deep · 10 km away
  46. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1084 days ago · 26 km deep · 21 km away
  47. 2.088 km SW of Adak, Alaska · 1083 days ago · 34 km deep · 78 km away
  48. 2.962 km SSW of Adak, Alaska · 1082 days ago · 35 km deep · 45 km away
  49. 2.737 km SSW of Adak, Alaska · 1082 days ago · 35 km deep · 17 km away
  50. 2.381 km ENE of Adak, Alaska · 1082 days ago · 137 km deep · 90 km away
  51. 2.250 km W of Adak, Alaska · 1082 days ago · 94 km deep · 63 km away
  52. 2.769 km SSW of Adak, Alaska · 1081 days ago · 35 km deep · 50 km away
  53. 1.889 km WSW of Adak, Alaska · 1081 days ago · 13 km deep · 84 km away
  54. 1.746 km S of Adak, Alaska · 1081 days ago · 24 km deep · 20 km away
  55. 1.838 km SW of Adak, Alaska · 1081 days ago · 52 km deep · 36 km away
  56. 2.847 km E of Adak, Alaska · 1080 days ago · 133 km deep · 48 km away
  57. 1.8Andreanof Islands, Aleutian Islands, Alaska · 1080 days ago · 71 km deep · 26 km away
  58. 2.048 km SSE of Adak, Alaska · 1079 days ago · 32 km deep · 24 km away
  59. 1.788 km WSW of Adak, Alaska · 1079 days ago · 30 km deep · 83 km away
  60. 2.362 km SE of Adak, Alaska · 1078 days ago · 29 km deep · 44 km away

The first 60 of 180.

Before

  1. 1.957 km SE of Adak, Alaska · 1096 days ago · 20 km deep · 38 km away
  2. 2.797 km ESE of Adak, Alaska · 1096 days ago · 35 km deep · 86 km away
  3. 1.851 km SE of Adak, Alaska · 1098 days ago · 47 km deep · 29 km away
  4. 1.898 km SW of Adak, Alaska · 1099 days ago · 22 km deep · 84 km away
  5. 1.699 km SW of Adak, Alaska · 1099 days ago · 25 km deep · 88 km away
  6. 1.748 km SW of Adak, Alaska · 1099 days ago · 41 km deep · 37 km away
  7. 1.640 km SE of Adak, Alaska · 1099 days ago · 54 km deep · 27 km away
  8. 1.8101 km SW of Adak, Alaska · 1099 days ago · 43 km deep · 93 km away
  9. 3.369 km SSE of Adak, Alaska · 1099 days ago · 35 km deep · 45 km away
  10. 2.559 km WSW of Adak, Alaska · 1099 days ago · 15 km deep · 55 km away
  11. 1.942 km S of Adak, Alaska · 1100 days ago · 46 km deep · 15 km away
  12. 1.8Andreanof Islands, Aleutian Islands, Alaska · 1100 days ago · 24 km deep · 31 km away
  13. 1.964 km SSW of Adak, Alaska · 1100 days ago · 26 km deep · 44 km away
  14. 1.993 km SW of Adak, Alaska · 1100 days ago · 13 km deep · 84 km away
  15. 2.183 km WSW of Atka, Alaska · 1100 days ago · 75 km deep · 91 km away
  16. 1.946 km SW of Adak, Alaska · 1100 days ago · 29 km deep · 37 km away
  17. 2.664 km S of Adak, Alaska · 1101 days ago · 35 km deep · 40 km away
  18. 2.161 km ESE of Adak, Alaska · 1101 days ago · 25 km deep · 47 km away
  19. 3.662 km SSE of Adak, Alaska · 1102 days ago · 35 km deep · 39 km away
  20. 3.7100 km WSW of Adak, Alaska · 1102 days ago · 82 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lgfm (also filed as ak023cqfxhdj). Read Mon, Oct 5, 2026, 5:25 AM UTC.