Alaska earthquakes

M2.6 earthquake 98 km WSW of Adak, Alaska

A magnitude 2.6 earthquake struck 98 km WSW of Adak, Alaska on Mon, Oct 30, 2023, 8:31 PM HADT (05:31 UTC), 68 km (42 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
2.6 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-10-31 05:31:38 UTC
Depth
67.7 km (42.1 mi), shallow
Epicenter
51.533° N, 177.949° 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
2.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.091 · 16 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 6.2 km horizontally, 6.5 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
193°, poorly surrounded by stations
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 109 in the 30 days before it.

After

  1. 2.1107 km W of Adak, Alaska · 1065 days ago · 133 km deep · 51 km away
  2. 1.749 km S of Adak, Alaska · 1065 days ago · 34 km deep · 98 km away
  3. 1.527 km SW of Adak, Alaska · 1065 days ago · 70 km deep · 74 km away
  4. 3.1152 km WSW of Adak, Alaska · 1065 days ago · 35 km deep · 54 km away
  5. 1.9154 km WSW of Adak, Alaska · 1065 days ago · 75 km deep · 62 km away
  6. 2.6101 km WSW of Adak, Alaska · 1063 days ago · 60 km deep · 14 km away
  7. 3.1140 km W of Adak, Alaska · 1063 days ago · 100 km deep · 56 km away
  8. 3.243 km SSW of Adak, Alaska · 1062 days ago · 35 km deep · 82 km away
  9. 1.850 km S of Adak, Alaska · 1062 days ago · 32 km deep · 82 km away
  10. 2.1143 km W of Adak, Alaska · 1062 days ago · 94 km deep · 65 km away
  11. 2.681 km SSW of Adak, Alaska · 1059 days ago · 35 km deep · 85 km away
  12. 3.6145 km WSW of Adak, Alaska · 1058 days ago · 35 km deep · 48 km away
  13. 1.959 km WSW of Adak, Alaska · 1058 days ago · 20 km deep · 41 km away
  14. 3.5136 km WSW of Adak, Alaska · 1058 days ago · 35 km deep · 41 km away
  15. 4.144 km S of Adak, Alaska · 1057 days ago · 35 km deep · 90 km away
  16. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1057 days ago · 30 km deep · 71 km away
  17. 3.595 km WSW of Adak, Alaska · 1057 days ago · 66 km deep · 4 km away
  18. 3.0149 km WSW of Adak, Alaska · 1056 days ago · 35 km deep · 54 km away
  19. 2.9195 km WSW of Adak, Alaska · 1056 days ago · 35 km deep · 97 km away
  20. 2.638 km S of Adak, Alaska · 1055 days ago · 48 km deep · 84 km away
  21. 2.978 km SW of Adak, Alaska · 1055 days ago · 56 km deep · 39 km away
  22. 2.8134 km WSW of Adak, Alaska · 1055 days ago · 35 km deep · 38 km away
  23. 2.7150 km WSW of Adak, Alaska · 1054 days ago · 35 km deep · 56 km away
  24. 3.230 km W of Adak, Alaska · 1054 days ago · 83 km deep · 70 km away
  25. 2.7165 km WSW of Adak, Alaska · 1054 days ago · 18 km deep · 67 km away
  26. 3.589 km W of Adak, Alaska · 1054 days ago · 7 km deep · 40 km away
  27. 1.689 km W of Adak, Alaska · 1054 days ago · 6 km deep · 37 km away
  28. 1.889 km W of Adak, Alaska · 1054 days ago · 6 km deep · 37 km away
  29. 2.8179 km WSW of Adak, Alaska · 1054 days ago · 18 km deep · 82 km away
  30. 2.089 km W of Adak, Alaska · 1054 days ago · 5 km deep · 37 km away
  31. 3.654 km WSW of Adak, Alaska · 1054 days ago · 86 km deep · 44 km away
  32. 2.059 km SW of Adak, Alaska · 1053 days ago · 49 km deep · 50 km away
  33. 2.291 km WSW of Adak, Alaska · 1053 days ago · 75 km deep · 7 km away
  34. 1.6139 km W of Adak, Alaska · 1053 days ago · 15 km deep · 59 km away
  35. 2.088 km WSW of Adak, Alaska · 1052 days ago · 47 km deep · 10 km away
  36. 2.9147 km WSW of Adak, Alaska · 1052 days ago · 34 km deep · 52 km away
  37. 1.935 km S of Adak, Alaska · 1052 days ago · 36 km deep · 89 km away
  38. 2.793 km SW of Adak, Alaska · 1051 days ago · 35 km deep · 37 km away
  39. 3.6133 km SW of Adak, Alaska · 1050 days ago · 21 km deep · 48 km away
  40. 2.5132 km SW of Adak, Alaska · 1050 days ago · 35 km deep · 43 km away
  41. 2.2130 km SW of Adak, Alaska · 1050 days ago · 27 km deep · 39 km away
  42. 2.1130 km SW of Adak, Alaska · 1050 days ago · 22 km deep · 41 km away
  43. 2.2145 km WSW of Adak, Alaska · 1049 days ago · 18 km deep · 49 km away
  44. 2.1131 km SW of Adak, Alaska · 1049 days ago · 22 km deep · 44 km away
  45. 2.1160 km WSW of Adak, Alaska · 1049 days ago · 15 km deep · 67 km away
  46. 2.9156 km WSW of Adak, Alaska · 1049 days ago · 15 km deep · 58 km away
  47. 2.4Andreanof Islands, Aleutian Islands, Alaska · 1049 days ago · 50 km deep · 59 km away
  48. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1048 days ago · 12 km deep · 55 km away
  49. 2.5114 km SW of Adak, Alaska · 1048 days ago · 35 km deep · 41 km away
  50. 2.2171 km WSW of Adak, Alaska · 1048 days ago · 24 km deep · 74 km away
  51. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1048 days ago · 24 km deep · 97 km away
  52. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1048 days ago · 72 km deep · 36 km away
  53. 2.078 km WSW of Adak, Alaska · 1043 days ago · 36 km deep · 21 km away
  54. 3.1102 km SW of Adak, Alaska · 1042 days ago · 48 km deep · 29 km away
  55. 2.771 km SSW of Adak, Alaska · 1041 days ago · 35 km deep · 71 km away
  56. 2.0121 km WSW of Adak, Alaska · 1041 days ago · 26 km deep · 28 km away
  57. 2.9185 km WSW of Adak, Alaska · 1041 days ago · 79 km deep · 91 km away
  58. 1.970 km SW of Adak, Alaska · 1041 days ago · 56 km deep · 34 km away
  59. 3.6191 km W of Adak, Alaska · 1040 days ago · 83 km deep · 98 km away
  60. 3.1145 km W of Adak, Alaska · 1040 days ago · 98 km deep · 56 km away

The first 60 of at least 199.

Before

  1. 1.7117 km WSW of Adak, Alaska · 1066 days ago · 25 km deep · 20 km away
  2. 1.7133 km WSW of Adak, Alaska · 1066 days ago · 8 km deep · 41 km away
  3. 1.8154 km WSW of Adak, Alaska · 1066 days ago · 19 km deep · 56 km away
  4. 3.657 km S of Adak, Alaska · 1067 days ago · 35 km deep · 96 km away
  5. 2.156 km W of Adak, Alaska · 1067 days ago · 104 km deep · 52 km away
  6. 2.0118 km SW of Adak, Alaska · 1067 days ago · 21 km deep · 37 km away
  7. 2.194 km WSW of Adak, Alaska · 1067 days ago · 59 km deep · 16 km away
  8. 2.641 km S of Adak, Alaska · 1068 days ago · 34 km deep · 86 km away
  9. 2.0124 km WSW of Adak, Alaska · 1068 days ago · 5 km deep · 26 km away
  10. 2.8170 km WSW of Adak, Alaska · 1068 days ago · 32 km deep · 73 km away
  11. 1.9186 km W of Adak, Alaska · 1068 days ago · 74 km deep · 94 km away
  12. 1.8194 km WSW of Adak, Alaska · 1069 days ago · 23 km deep · 97 km away
  13. 1.551 km S of Adak, Alaska · 1069 days ago · 24 km deep · 88 km away
  14. 3.972 km SW of Adak, Alaska · 1069 days ago · 60 km deep · 34 km away
  15. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1069 days ago · 19 km deep · 94 km away
  16. 1.693 km SW of Adak, Alaska · 1069 days ago · 40 km deep · 22 km away
  17. 1.576 km WSW of Adak, Alaska · 1070 days ago · 23 km deep · 24 km away
  18. 2.7181 km WSW of Adak, Alaska · 1070 days ago · 32 km deep · 83 km away
  19. 2.2182 km WSW of Adak, Alaska · 1070 days ago · 16 km deep · 86 km away
  20. 2.0175 km WSW of Adak, Alaska · 1070 days ago · 22 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lp8m (also filed as ak023dyujeci). Read Thu, Oct 1, 2026, 3:35 AM UTC.