Alaska earthquakes

M2.5 earthquake 26 km SSW of Atka, Alaska

A magnitude 2.5 earthquake struck 26 km SSW of Atka, Alaska on Mon, Oct 2, 2023, 11:45 AM HADT (20:45 UTC), 74 km (46 mi) below the surface.

A larger quake followed: M4.4 9 km E of Atka, 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
2023-10-02 20:45:51 UTC
Depth
74.1 km (46.0 mi), intermediate-depth
Epicenter
51.981° N, 174.352° 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 · ±0.105 · 12 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 14.9 km horizontally, 17.7 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
235°, poorly surrounded by stations
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 112 in the 60 days after this one and 87 in the 30 days before it.

After

  1. 1.957 km SW of Atka, Alaska · 1096 days ago · 38 km deep · 33 km away
  2. 2.949 km N of Atka, Alaska · 1096 days ago · 206 km deep · 74 km away
  3. 1.932 km ESE of Atka, Alaska · 1095 days ago · 17 km deep · 44 km away
  4. 2.138 km ESE of Atka, Alaska · 1095 days ago · 13 km deep · 45 km away
  5. 2.797 km ESE of Adak, Alaska · 1094 days ago · 35 km deep · 82 km away
  6. 1.966 km SW of Atka, Alaska · 1093 days ago · 29 km deep · 42 km away
  7. 1.647 km W of Atka, Alaska · 1093 days ago · 13 km deep · 42 km away
  8. 4.048 km N of Atka, Alaska · 1092 days ago · 177 km deep · 73 km away
  9. 2.962 km WNW of Atka, Alaska · 1092 days ago · 201 km deep · 65 km away
  10. 3.0103 km SSW of Atka, Alaska · 1091 days ago · 35 km deep · 78 km away
  11. 3.245 km SE of Atka, Alaska · 1091 days ago · 10 km deep · 47 km away
  12. 2.949 km ESE of Atka, Alaska · 1090 days ago · 11 km deep · 53 km away
  13. 3.579 km SE of Atka, Alaska · 1090 days ago · 35 km deep · 74 km away
  14. 3.519 km N of Atka, Alaska · 1090 days ago · 203 km deep · 45 km away
  15. 2.578 km SW of Atka, Alaska · 1090 days ago · 35 km deep · 54 km away
  16. 2.850 km ESE of Atka, Alaska · 1090 days ago · 10 km deep · 53 km away
  17. 1.854 km SSW of Atka, Alaska · 1089 days ago · 14 km deep · 29 km away
  18. 1.941 km E of Atka, Alaska · 1089 days ago · 13 km deep · 55 km away
  19. 2.636 km S of Atka, Alaska · 1089 days ago · 66 km deep · 17 km away
  20. 2.143 km E of Atka, Alaska · 1088 days ago · 28 km deep · 57 km away
  21. 1.960 km SE of Atka, Alaska · 1088 days ago · 55 km deep · 60 km away
  22. 1.536 km ESE of Atka, Alaska · 1088 days ago · 14 km deep · 41 km away
  23. 3.549 km SE of Atka, Alaska · 1088 days ago · 5 km deep · 48 km away
  24. 1.637 km ESE of Atka, Alaska · 1088 days ago · 6 km deep · 46 km away
  25. 1.645 km NNE of Atka, Alaska · 1088 days ago · 20 km deep · 71 km away
  26. 1.634 km ESE of Atka, Alaska · 1088 days ago · 7 km deep · 41 km away
  27. 1.938 km ESE of Atka, Alaska · 1088 days ago · 7 km deep · 47 km away
  28. 3.623 km SE of Atka, Alaska · 1088 days ago · 172 km deep · 24 km away
  29. 3.951 km E of Atka, Alaska · 1088 days ago · 78 km deep · 65 km away
  30. 1.580 km ESE of Adak, Alaska · 1088 days ago · 28 km deep · 85 km away
  31. 2.182 km ENE of Adak, Alaska · 1088 days ago · 100 km deep · 84 km away
  32. 2.095 km ESE of Adak, Alaska · 1087 days ago · 38 km deep · 80 km away
  33. 2.330 km SSW of Atka, Alaska · 1087 days ago · 91 km deep · 4 km away
  34. 3.856 km ENE of Atka, Alaska · 1085 days ago · 136 km deep · 77 km away
  35. 2.565 km E of Adak, Alaska · 1085 days ago · 69 km deep · 94 km away
  36. 1.619 km WNW of Atka, Alaska · 1085 days ago · 6 km deep · 30 km away
  37. 2.764 km E of Adak, Alaska · 1084 days ago · 145 km deep · 92 km away
  38. 2.078 km W of Atka, Alaska · 1084 days ago · 106 km deep · 72 km away
  39. 3.467 km WSW of Atka, Alaska · 1083 days ago · 84 km deep · 51 km away
  40. 3.259 km SE of Atka, Alaska · 1082 days ago · 26 km deep · 60 km away
  41. 3.236 km N of Atka, Alaska · 1082 days ago · 201 km deep · 60 km away
  42. 3.216 km SSE of Atka, Alaska · 1081 days ago · 83 km deep · 20 km away
  43. 2.381 km ENE of Adak, Alaska · 1079 days ago · 137 km deep · 82 km away
  44. 3.039 km NNW of Atka, Alaska · 1079 days ago · 185 km deep · 60 km away
  45. 1.952 km SSW of Atka, Alaska · 1078 days ago · 37 km deep · 27 km away
  46. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1078 days ago · 10 km deep · 38 km away
  47. 4.126 km NNE of Atka, Alaska · 1078 days ago · 119 km deep · 52 km away
  48. 1.933 km ESE of Atka, Alaska · 1077 days ago · 10 km deep · 45 km away
  49. 1.936 km ESE of Atka, Alaska · 1076 days ago · 9 km deep · 45 km away
  50. 2.151 km SE of Atka, Alaska · 1074 days ago · 24 km deep · 44 km away
  51. 1.992 km SW of Atka, Alaska · 1074 days ago · 26 km deep · 69 km away
  52. 1.941 km ESE of Atka, Alaska · 1074 days ago · 1 km deep · 48 km away
  53. 1.836 km ESE of Atka, Alaska · 1074 days ago · 5 km deep · 43 km away
  54. 1.928 km SE of Atka, Alaska · 1074 days ago · 3 km deep · 31 km away
  55. 2.2Andreanof Islands, Aleutian Islands, Alaska · 1074 days ago · 21 km deep · 67 km away
  56. 1.843 km SW of Atka, Alaska · 1073 days ago · 70 km deep · 25 km away
  57. 2.372 km ENE of Adak, Alaska · 1073 days ago · 140 km deep · 98 km away
  58. 2.431 km ESE of Atka, Alaska · 1072 days ago · 12 km deep · 43 km away
  59. 3.046 km ESE of Atka, Alaska · 1072 days ago · 10 km deep · 50 km away
  60. 1.915 km SSW of Atka, Alaska · 1071 days ago · 83 km deep · 11 km away

The first 60 of 112.

Before

  1. 1.660 km WSW of Atka, Alaska · 1096 days ago · 66 km deep · 44 km away
  2. 1.829 km ESE of Atka, Alaska · 1096 days ago · 13 km deep · 40 km away
  3. 2.3100 km SSE of Atka, Alaska · 1096 days ago · 7 km deep · 86 km away
  4. 1.940 km ESE of Atka, Alaska · 1096 days ago · 10 km deep · 50 km away
  5. 2.742 km W of Atka, Alaska · 1096 days ago · 10 km deep · 38 km away
  6. 2.131 km ESE of Atka, Alaska · 1097 days ago · 8 km deep · 38 km away
  7. 1.616 km WNW of Atka, Alaska · 1097 days ago · 10 km deep · 31 km away
  8. 2.574 km S of Atka, Alaska · 1098 days ago · 35 km deep · 53 km away
  9. 2.979 km SSE of Atka, Alaska · 1098 days ago · 35 km deep · 62 km away
  10. 2.183 km WSW of Atka, Alaska · 1098 days ago · 75 km deep · 67 km away
  11. 2.272 km WSW of Atka, Alaska · 1098 days ago · 60 km deep · 56 km away
  12. 2.939 km SSW of Atka, Alaska · 1100 days ago · 62 km deep · 13 km away
  13. 1.732 km ESE of Atka, Alaska · 1100 days ago · 11 km deep · 43 km away
  14. 1.845 km E of Atka, Alaska · 1100 days ago · 16 km deep · 57 km away
  15. 2.589 km ESE of Atka, Alaska · 1101 days ago · 73 km deep · 96 km away
  16. 1.739 km ESE of Atka, Alaska · 1101 days ago · 9 km deep · 47 km away
  17. 2.3109 km SSE of Atka, Alaska · 1101 days ago · 16 km deep · 92 km away
  18. 1.635 km ESE of Atka, Alaska · 1102 days ago · 6 km deep · 41 km away
  19. 1.652 km SSE of Atka, Alaska · 1102 days ago · 7 km deep · 36 km away
  20. 1.831 km ESE of Atka, Alaska · 1102 days ago · 13 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lfzk (also filed as ak023cn4yv4v). Read Fri, Oct 2, 2026, 9:02 PM UTC.