Alaska earthquakes

M3.8 earthquake 78 km SE of Adak, Alaska

A magnitude 3.8 earthquake struck 78 km SE of Adak, Alaska on Fri, Sep 15, 2023, 10:09 AM HADT (19:09 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.1 63 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
3.8 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-09-15 19:09:55 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.405° N, 175.784° 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
3.8mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.227 · 5 stations
3.2ML, 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 4.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.23
Depth from
Operator assigned
Station coverage gap
204°, poorly surrounded by stations
Stations used
36

Nearby

Within 100 km, magnitude 1.5 and up: 147 in the 60 days after this one and 113 in the 30 days before it.

After

  1. 1.733 km SE of Adak, Alaska · 1112 days ago · 64 km deep · 45 km away
  2. 1.830 km WSW of Adak, Alaska · 1111 days ago · 13 km deep · 95 km away
  3. 1.753 km SW of Adak, Alaska · 1110 days ago · 55 km deep · 96 km away
  4. 1.792 km ESE of Adak, Alaska · 1110 days ago · 29 km deep · 34 km away
  5. 2.9109 km SSW of Atka, Alaska · 1109 days ago · 35 km deep · 50 km away
  6. 1.863 km SSW of Adak, Alaska · 1109 days ago · 33 km deep · 87 km away
  7. 1.756 km SSE of Adak, Alaska · 1108 days ago · 25 km deep · 36 km away
  8. 2.226 km E of Adak, Alaska · 1107 days ago · 67 km deep · 59 km away
  9. 1.632 km SSE of Adak, Alaska · 1104 days ago · 44 km deep · 49 km away
  10. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1103 days ago · 138 km deep · 70 km away
  11. 1.643 km S of Adak, Alaska · 1103 days ago · 33 km deep · 57 km away
  12. 3.251 km S of Adak, Alaska · 1102 days ago · 10 km deep · 65 km away
  13. 1.648 km ENE of Adak, Alaska · 1102 days ago · 5 km deep · 76 km away
  14. 1.948 km ENE of Adak, Alaska · 1102 days ago · 5 km deep · 76 km away
  15. 1.651 km SSW of Atka, Alaska · 1101 days ago · 40 km deep · 98 km away
  16. 1.678 km SSE of Adak, Alaska · 1101 days ago · 20 km deep · 50 km away
  17. 1.668 km S of Adak, Alaska · 1101 days ago · 19 km deep · 49 km away
  18. 1.869 km SSE of Adak, Alaska · 1101 days ago · 20 km deep · 41 km away
  19. 1.839 km ESE of Adak, Alaska · 1100 days ago · 62 km deep · 45 km away
  20. 3.072 km SSW of Adak, Alaska · 1100 days ago · 35 km deep · 95 km away
  21. 2.780 km SSE of Adak, Alaska · 1100 days ago · 35 km deep · 48 km away
  22. 2.057 km SSE of Adak, Alaska · 1099 days ago · 35 km deep · 36 km away
  23. 1.662 km SSW of Adak, Alaska · 1098 days ago · 25 km deep · 84 km away
  24. 3.662 km SSE of Adak, Alaska · 1098 days ago · 35 km deep · 26 km away
  25. 2.161 km ESE of Adak, Alaska · 1097 days ago · 25 km deep · 20 km away
  26. 2.664 km S of Adak, Alaska · 1097 days ago · 35 km deep · 72 km away
  27. 2.272 km WSW of Atka, Alaska · 1097 days ago · 60 km deep · 71 km away
  28. 1.946 km SW of Adak, Alaska · 1096 days ago · 29 km deep · 92 km away
  29. 2.183 km WSW of Atka, Alaska · 1096 days ago · 75 km deep · 64 km away
  30. 1.964 km SSW of Adak, Alaska · 1096 days ago · 26 km deep · 85 km away
  31. 1.8Andreanof Islands, Aleutian Islands, Alaska · 1096 days ago · 24 km deep · 28 km away
  32. 1.942 km S of Adak, Alaska · 1096 days ago · 46 km deep · 55 km away
  33. 3.369 km SSE of Adak, Alaska · 1096 days ago · 35 km deep · 25 km away
  34. 1.640 km SE of Adak, Alaska · 1095 days ago · 54 km deep · 38 km away
  35. 1.748 km SW of Adak, Alaska · 1095 days ago · 41 km deep · 90 km away
  36. 1.660 km WSW of Atka, Alaska · 1095 days ago · 66 km deep · 83 km away
  37. 1.851 km SE of Adak, Alaska · 1094 days ago · 47 km deep · 31 km away
  38. 1.957 km SW of Atka, Alaska · 1094 days ago · 38 km deep · 85 km away
  39. 2.797 km ESE of Adak, Alaska · 1093 days ago · 35 km deep · 36 km away
  40. 1.957 km SE of Adak, Alaska · 1093 days ago · 20 km deep · 22 km away
  41. 2.527 km S of Adak, Alaska · 1093 days ago · 66 km deep · 59 km away
  42. 1.958 km SE of Adak, Alaska · 1092 days ago · 32 km deep · 20 km away
  43. 1.850 km S of Adak, Alaska · 1092 days ago · 24 km deep · 52 km away
  44. 1.770 km SSW of Adak, Alaska · 1092 days ago · 32 km deep · 86 km away
  45. 1.637 km SSE of Adak, Alaska · 1092 days ago · 41 km deep · 44 km away
  46. 1.767 km SSE of Adak, Alaska · 1091 days ago · 24 km deep · 40 km away
  47. 1.966 km SW of Atka, Alaska · 1091 days ago · 29 km deep · 76 km away
  48. 3.0103 km SSW of Atka, Alaska · 1090 days ago · 35 km deep · 52 km away
  49. 1.860 km SSW of Adak, Alaska · 1090 days ago · 51 km deep · 91 km away
  50. 2.033 km SE of Adak, Alaska · 1089 days ago · 69 km deep · 45 km away
  51. 2.578 km SW of Atka, Alaska · 1088 days ago · 35 km deep · 65 km away
  52. 2.152 km ENE of Adak, Alaska · 1088 days ago · 122 km deep · 80 km away
  53. 1.741 km SSW of Adak, Alaska · 1088 days ago · 44 km deep · 70 km away
  54. 1.854 km SSW of Atka, Alaska · 1088 days ago · 14 km deep · 91 km away
  55. 1.646 km SSE of Adak, Alaska · 1088 days ago · 36 km deep · 43 km away
  56. 1.8Andreanof Islands, Aleutian Islands, Alaska · 1088 days ago · 26 km deep · 21 km away
  57. 1.550 km S of Adak, Alaska · 1088 days ago · 24 km deep · 51 km away
  58. 2.841 km NE of Adak, Alaska · 1088 days ago · 131 km deep · 89 km away
  59. 2.158 km ENE of Adak, Alaska · 1087 days ago · 165 km deep · 69 km away
  60. 1.882 km ESE of Adak, Alaska · 1087 days ago · 51 km deep · 16 km away

The first 60 of 147.

Before

  1. 2.072 km SSW of Adak, Alaska · 1112 days ago · 32 km deep · 93 km away
  2. 1.757 km S of Adak, Alaska · 1112 days ago · 39 km deep · 70 km away
  3. 2.759 km S of Adak, Alaska · 1112 days ago · 35 km deep · 66 km away
  4. 2.064 km SSW of Adak, Alaska · 1112 days ago · 46 km deep · 91 km away
  5. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1112 days ago · 22 km deep · 30 km away
  6. 1.860 km SSE of Adak, Alaska · 1113 days ago · 22 km deep · 27 km away
  7. 2.649 km S of Adak, Alaska · 1113 days ago · 40 km deep · 61 km away
  8. 1.956 km S of Adak, Alaska · 1113 days ago · 37 km deep · 69 km away
  9. 2.163 km SE of Adak, Alaska · 1113 days ago · 23 km deep · 15 km away
  10. 1.768 km SSW of Adak, Alaska · 1114 days ago · 25 km deep · 85 km away
  11. 1.968 km SSW of Adak, Alaska · 1114 days ago · 26 km deep · 87 km away
  12. 1.958 km SSE of Adak, Alaska · 1114 days ago · 24 km deep · 40 km away
  13. 5.044 km SSE of Adak, Alaska · 1114 days ago · 50 km deep · 45 km away · felt by 2
  14. 2.215 km ESE of Adak, Alaska · 1115 days ago · 101 km deep · 64 km away
  15. 1.829 km SW of Adak, Alaska · 1115 days ago · 2 km deep · 90 km away
  16. 1.661 km SE of Adak, Alaska · 1116 days ago · 23 km deep · 22 km away
  17. 3.387 km ESE of Adak, Alaska · 1116 days ago · 35 km deep · 15 km away
  18. 1.938 km ESE of Adak, Alaska · 1117 days ago · 72 km deep · 44 km away
  19. 1.858 km SSE of Adak, Alaska · 1117 days ago · 18 km deep · 34 km away
  20. 3.543 km E of Adak, Alaska · 1117 days ago · 80 km deep · 50 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lbik (also filed as ak023bv00tig). Read Thu, Oct 1, 2026, 9:11 AM UTC.