Alaska earthquakes

M3.9 earthquake 44 km NNW of Atka, Alaska

A magnitude 3.9 earthquake struck 44 km NNW of Atka, Alaska on Mon, Sep 25, 2023, 7:21 AM HADT (16:21 UTC), 202 km (125 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
3.9 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-09-25 16:21:11 UTC
Depth
201.8 km (125.4 mi), intermediate-depth
Epicenter
52.560° N, 174.460° 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
3.9mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 24 stations
3.3ML, 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 14.2 km horizontally, 9.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
124°
Stations used
37

Nearby

Within 100 km, magnitude 1.5 and up: 102 in the 60 days after this one and 69 in the 30 days before it.

After

  1. 1.651 km SSW of Atka, Alaska · 1101 days ago · 40 km deep · 88 km away
  2. 2.037 km NW of Atka, Alaska · 1101 days ago · 150 km deep · 19 km away
  3. 1.831 km ESE of Atka, Alaska · 1101 days ago · 13 km deep · 70 km away
  4. 1.652 km SSE of Atka, Alaska · 1101 days ago · 7 km deep · 97 km away
  5. 1.635 km ESE of Atka, Alaska · 1101 days ago · 6 km deep · 75 km away
  6. 1.739 km ESE of Atka, Alaska · 1099 days ago · 9 km deep · 78 km away
  7. 1.845 km E of Atka, Alaska · 1099 days ago · 16 km deep · 78 km away
  8. 2.696 km WNW of Atka, Alaska · 1099 days ago · 198 km deep · 64 km away
  9. 1.732 km ESE of Atka, Alaska · 1099 days ago · 11 km deep · 70 km away
  10. 2.939 km SSW of Atka, Alaska · 1099 days ago · 62 km deep · 77 km away
  11. 2.272 km WSW of Atka, Alaska · 1097 days ago · 60 km deep · 86 km away
  12. 2.183 km WSW of Atka, Alaska · 1097 days ago · 75 km deep · 94 km away
  13. 1.616 km WNW of Atka, Alaska · 1096 days ago · 10 km deep · 34 km away
  14. 2.131 km ESE of Atka, Alaska · 1096 days ago · 8 km deep · 72 km away
  15. 2.742 km W of Atka, Alaska · 1095 days ago · 10 km deep · 50 km away
  16. 1.940 km ESE of Atka, Alaska · 1095 days ago · 10 km deep · 77 km away
  17. 1.829 km ESE of Atka, Alaska · 1095 days ago · 13 km deep · 69 km away
  18. 1.660 km WSW of Atka, Alaska · 1095 days ago · 66 km deep · 75 km away
  19. 2.526 km SSW of Atka, Alaska · 1095 days ago · 74 km deep · 65 km away
  20. 1.957 km SW of Atka, Alaska · 1095 days ago · 38 km deep · 88 km away
  21. 2.949 km N of Atka, Alaska · 1094 days ago · 206 km deep · 21 km away
  22. 1.932 km ESE of Atka, Alaska · 1094 days ago · 17 km deep · 70 km away
  23. 2.138 km ESE of Atka, Alaska · 1094 days ago · 13 km deep · 77 km away
  24. 1.966 km SW of Atka, Alaska · 1092 days ago · 29 km deep · 95 km away
  25. 1.647 km W of Atka, Alaska · 1091 days ago · 13 km deep · 54 km away
  26. 4.048 km N of Atka, Alaska · 1091 days ago · 177 km deep · 20 km away
  27. 2.962 km WNW of Atka, Alaska · 1091 days ago · 201 km deep · 46 km away
  28. 3.245 km SE of Atka, Alaska · 1089 days ago · 10 km deep · 87 km away
  29. 2.949 km ESE of Atka, Alaska · 1089 days ago · 11 km deep · 89 km away
  30. 3.519 km N of Atka, Alaska · 1089 days ago · 203 km deep · 26 km away
  31. 2.850 km ESE of Atka, Alaska · 1089 days ago · 10 km deep · 90 km away
  32. 3.178 km NE of Atka, Alaska · 1088 days ago · 232 km deep · 74 km away
  33. 1.854 km SSW of Atka, Alaska · 1088 days ago · 14 km deep · 88 km away
  34. 1.941 km E of Atka, Alaska · 1088 days ago · 13 km deep · 74 km away
  35. 2.636 km S of Atka, Alaska · 1088 days ago · 66 km deep · 79 km away
  36. 4.194 km NNE of Adak, Alaska · 1087 days ago · 213 km deep · 96 km away
  37. 2.143 km E of Atka, Alaska · 1087 days ago · 28 km deep · 75 km away
  38. 1.536 km ESE of Atka, Alaska · 1087 days ago · 14 km deep · 77 km away
  39. 3.549 km SE of Atka, Alaska · 1087 days ago · 5 km deep · 91 km away
  40. 1.637 km ESE of Atka, Alaska · 1087 days ago · 6 km deep · 76 km away
  41. 1.645 km NNE of Atka, Alaska · 1087 days ago · 20 km deep · 41 km away
  42. 1.634 km ESE of Atka, Alaska · 1087 days ago · 7 km deep · 75 km away
  43. 1.938 km ESE of Atka, Alaska · 1087 days ago · 7 km deep · 76 km away
  44. 3.623 km SE of Atka, Alaska · 1087 days ago · 172 km deep · 67 km away
  45. 3.951 km E of Atka, Alaska · 1087 days ago · 78 km deep · 81 km away
  46. 2.182 km ENE of Adak, Alaska · 1086 days ago · 100 km deep · 85 km away
  47. 2.330 km SSW of Atka, Alaska · 1086 days ago · 91 km deep · 67 km away
  48. 3.856 km ENE of Atka, Alaska · 1084 days ago · 136 km deep · 71 km away
  49. 1.619 km WNW of Atka, Alaska · 1084 days ago · 6 km deep · 36 km away
  50. 2.078 km W of Atka, Alaska · 1083 days ago · 106 km deep · 73 km away
  51. 3.467 km WSW of Atka, Alaska · 1082 days ago · 84 km deep · 82 km away
  52. 3.259 km SE of Atka, Alaska · 1081 days ago · 26 km deep · 99 km away
  53. 3.236 km N of Atka, Alaska · 1081 days ago · 201 km deep · 12 km away
  54. 3.216 km SSE of Atka, Alaska · 1080 days ago · 83 km deep · 60 km away
  55. 2.381 km ENE of Adak, Alaska · 1078 days ago · 137 km deep · 87 km away
  56. 3.039 km NNW of Atka, Alaska · 1078 days ago · 185 km deep · 5 km away
  57. 1.952 km SSW of Atka, Alaska · 1077 days ago · 37 km deep · 85 km away
  58. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1077 days ago · 10 km deep · 28 km away
  59. 4.126 km NNE of Atka, Alaska · 1077 days ago · 119 km deep · 33 km away
  60. 1.933 km ESE of Atka, Alaska · 1075 days ago · 10 km deep · 71 km away

The first 60 of 102.

Before

  1. 3.048 km ESE of Atka, Alaska · 1102 days ago · 10 km deep · 88 km away
  2. 3.244 km ESE of Atka, Alaska · 1102 days ago · 13 km deep · 84 km away
  3. 3.150 km ESE of Atka, Alaska · 1102 days ago · 14 km deep · 87 km away
  4. 3.043 km SE of Atka, Alaska · 1104 days ago · 10 km deep · 85 km away
  5. 2.159 km ENE of Atka, Alaska · 1104 days ago · 12 km deep · 75 km away
  6. 3.244 km N of Atka, Alaska · 1104 days ago · 219 km deep · 14 km away
  7. 2.171 km E of Atka, Alaska · 1105 days ago · 11 km deep · 92 km away
  8. 1.933 km ESE of Atka, Alaska · 1105 days ago · 12 km deep · 71 km away
  9. 2.225 km ESE of Atka, Alaska · 1106 days ago · 5 km deep · 66 km away
  10. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1106 days ago · 1 km deep · 34 km away
  11. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1106 days ago · 10 km deep · 81 km away
  12. 3.1Andreanof Islands, Aleutian Islands, Alaska · 1109 days ago · 10 km deep · 87 km away
  13. 1.610 km SSW of Atka, Alaska · 1109 days ago · 9 km deep · 52 km away
  14. 3.148 km SE of Atka, Alaska · 1109 days ago · 10 km deep · 88 km away
  15. 3.055 km NNE of Atka, Alaska · 1109 days ago · 184 km deep · 45 km away
  16. 3.9Andreanof Islands, Aleutian Islands, Alaska · 1109 days ago · 85 km deep · 43 km away
  17. 1.631 km E of Atka, Alaska · 1110 days ago · 17 km deep · 64 km away
  18. 1.835 km ESE of Atka, Alaska · 1110 days ago · 9 km deep · 74 km away
  19. 3.245 km SE of Atka, Alaska · 1110 days ago · 10 km deep · 87 km away
  20. 2.134 km ESE of Atka, Alaska · 1110 days ago · 6 km deep · 73 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ldu1 (also filed as ak023cbhoh0v). Read Thu, Oct 1, 2026, 4:20 PM UTC.