Alaska earthquakes

M3.5 earthquake 19 km N of Atka, Alaska

A magnitude 3.5 earthquake struck 19 km N of Atka, Alaska on Sun, Oct 8, 2023, 6:07 AM HADT (15:07 UTC), 203 km (126 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
3.5 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-10-08 15:07:00 UTC
Depth
202.5 km (125.8 mi), intermediate-depth
Epicenter
52.374° N, 174.222° 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
3.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 16 stations
3.1ML, 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 24.8 km horizontally, 5.2 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
200°, poorly surrounded by stations
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 100 in the 60 days after this one and 75 in the 30 days before it.

After

  1. 2.578 km SW of Atka, Alaska · 1088 days ago · 35 km deep · 94 km away
  2. 2.850 km ESE of Atka, Alaska · 1088 days ago · 10 km deep · 64 km away
  3. 3.178 km NE of Atka, Alaska · 1088 days ago · 232 km deep · 67 km away
  4. 1.854 km SSW of Atka, Alaska · 1088 days ago · 14 km deep · 72 km away
  5. 1.941 km E of Atka, Alaska · 1088 days ago · 13 km deep · 49 km away
  6. 2.636 km S of Atka, Alaska · 1087 days ago · 66 km deep · 56 km away
  7. 2.143 km E of Atka, Alaska · 1087 days ago · 28 km deep · 51 km away
  8. 1.960 km SE of Atka, Alaska · 1087 days ago · 55 km deep · 75 km away
  9. 1.536 km ESE of Atka, Alaska · 1087 days ago · 14 km deep · 50 km away
  10. 3.549 km SE of Atka, Alaska · 1086 days ago · 5 km deep · 65 km away
  11. 1.637 km ESE of Atka, Alaska · 1086 days ago · 6 km deep · 50 km away
  12. 1.645 km NNE of Atka, Alaska · 1086 days ago · 20 km deep · 32 km away
  13. 1.634 km ESE of Atka, Alaska · 1086 days ago · 7 km deep · 49 km away
  14. 1.938 km ESE of Atka, Alaska · 1086 days ago · 7 km deep · 50 km away
  15. 3.623 km SE of Atka, Alaska · 1086 days ago · 172 km deep · 42 km away
  16. 3.951 km E of Atka, Alaska · 1086 days ago · 78 km deep · 57 km away
  17. 2.182 km ENE of Adak, Alaska · 1086 days ago · 100 km deep · 92 km away
  18. 2.330 km SSW of Atka, Alaska · 1086 days ago · 91 km deep · 48 km away
  19. 3.856 km ENE of Atka, Alaska · 1084 days ago · 136 km deep · 53 km away
  20. 1.619 km WNW of Atka, Alaska · 1083 days ago · 6 km deep · 23 km away
  21. 2.078 km W of Atka, Alaska · 1082 days ago · 106 km deep · 80 km away
  22. 3.467 km WSW of Atka, Alaska · 1082 days ago · 84 km deep · 77 km away
  23. 3.259 km SE of Atka, Alaska · 1081 days ago · 26 km deep · 73 km away
  24. 3.236 km N of Atka, Alaska · 1080 days ago · 201 km deep · 17 km away
  25. 3.216 km SSE of Atka, Alaska · 1079 days ago · 83 km deep · 35 km away
  26. 2.381 km ENE of Adak, Alaska · 1078 days ago · 137 km deep · 93 km away
  27. 3.039 km NNW of Atka, Alaska · 1077 days ago · 185 km deep · 23 km away
  28. 1.952 km SSW of Atka, Alaska · 1077 days ago · 37 km deep · 69 km away
  29. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1077 days ago · 10 km deep · 21 km away
  30. 4.126 km NNE of Atka, Alaska · 1076 days ago · 119 km deep · 13 km away
  31. 1.933 km ESE of Atka, Alaska · 1075 days ago · 10 km deep · 45 km away
  32. 1.936 km ESE of Atka, Alaska · 1074 days ago · 9 km deep · 48 km away
  33. 2.151 km SE of Atka, Alaska · 1073 days ago · 24 km deep · 69 km away
  34. 1.941 km ESE of Atka, Alaska · 1073 days ago · 1 km deep · 53 km away
  35. 1.836 km ESE of Atka, Alaska · 1073 days ago · 5 km deep · 50 km away
  36. 1.928 km SE of Atka, Alaska · 1072 days ago · 3 km deep · 45 km away
  37. 2.2Andreanof Islands, Aleutian Islands, Alaska · 1072 days ago · 21 km deep · 87 km away
  38. 1.843 km SW of Atka, Alaska · 1072 days ago · 70 km deep · 56 km away
  39. 2.431 km ESE of Atka, Alaska · 1070 days ago · 12 km deep · 43 km away
  40. 3.046 km ESE of Atka, Alaska · 1070 days ago · 10 km deep · 61 km away
  41. 1.915 km SSW of Atka, Alaska · 1069 days ago · 83 km deep · 34 km away
  42. 2.042 km E of Atka, Alaska · 1069 days ago · 26 km deep · 47 km away
  43. 1.879 km SW of Atka, Alaska · 1069 days ago · 47 km deep · 92 km away
  44. 3.663 km SE of Atka, Alaska · 1069 days ago · 35 km deep · 78 km away
  45. 2.054 km WSW of Atka, Alaska · 1069 days ago · 119 km deep · 60 km away
  46. 1.885 km E of Adak, Alaska · 1069 days ago · 70 km deep · 94 km away
  47. 4.156 km E of Atka, Alaska · 1068 days ago · 86 km deep · 59 km away
  48. 2.940 km SE of Atka, Alaska · 1068 days ago · 10 km deep · 55 km away
  49. 2.752 km SSW of Atka, Alaska · 1067 days ago · 35 km deep · 72 km away
  50. 1.867 km W of Atka, Alaska · 1066 days ago · 76 km deep · 71 km away
  51. 2.059 km SE of Atka, Alaska · 1065 days ago · 24 km deep · 75 km away
  52. 2.087 km WSW of Atka, Alaska · 1065 days ago · 66 km deep · 96 km away
  53. 1.872 km SSW of Atka, Alaska · 1065 days ago · 15 km deep · 90 km away
  54. 1.822 km WSW of Atka, Alaska · 1065 days ago · 9 km deep · 35 km away
  55. 1.731 km WSW of Atka, Alaska · 1064 days ago · 79 km deep · 43 km away
  56. 1.737 km ESE of Atka, Alaska · 1064 days ago · 7 km deep · 50 km away
  57. 2.456 km ESE of Atka, Alaska · 1064 days ago · 38 km deep · 69 km away
  58. 2.958 km SE of Atka, Alaska · 1062 days ago · 17 km deep · 75 km away
  59. 2.678 km SE of Atka, Alaska · 1058 days ago · 35 km deep · 96 km away
  60. 4.264 km E of Atka, Alaska · 1058 days ago · 80 km deep · 71 km away

The first 60 of 100.

Before

  1. 3.579 km SE of Atka, Alaska · 1089 days ago · 35 km deep · 95 km away
  2. 2.949 km ESE of Atka, Alaska · 1089 days ago · 11 km deep · 63 km away
  3. 3.245 km SE of Atka, Alaska · 1089 days ago · 10 km deep · 61 km away
  4. 2.962 km WNW of Atka, Alaska · 1090 days ago · 201 km deep · 57 km away
  5. 4.048 km N of Atka, Alaska · 1091 days ago · 177 km deep · 29 km away
  6. 1.647 km W of Atka, Alaska · 1091 days ago · 13 km deep · 52 km away
  7. 1.966 km SW of Atka, Alaska · 1091 days ago · 29 km deep · 82 km away
  8. 2.138 km ESE of Atka, Alaska · 1094 days ago · 13 km deep · 51 km away
  9. 1.932 km ESE of Atka, Alaska · 1094 days ago · 17 km deep · 44 km away
  10. 2.949 km N of Atka, Alaska · 1094 days ago · 206 km deep · 30 km away
  11. 1.957 km SW of Atka, Alaska · 1094 days ago · 38 km deep · 74 km away
  12. 2.526 km SSW of Atka, Alaska · 1094 days ago · 74 km deep · 45 km away
  13. 1.660 km WSW of Atka, Alaska · 1094 days ago · 66 km deep · 69 km away
  14. 1.829 km ESE of Atka, Alaska · 1094 days ago · 13 km deep · 42 km away
  15. 1.940 km ESE of Atka, Alaska · 1095 days ago · 10 km deep · 51 km away
  16. 2.742 km W of Atka, Alaska · 1095 days ago · 10 km deep · 46 km away
  17. 2.131 km ESE of Atka, Alaska · 1095 days ago · 8 km deep · 45 km away
  18. 1.616 km WNW of Atka, Alaska · 1095 days ago · 10 km deep · 19 km away
  19. 2.574 km S of Atka, Alaska · 1096 days ago · 35 km deep · 94 km away
  20. 2.979 km SSE of Atka, Alaska · 1096 days ago · 35 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lhec (also filed as ak023cwyzj8b). Read Thu, Oct 1, 2026, 4:45 AM UTC.