Alaska earthquakes

M2.7 earthquake 115 km WSW of Adak, Alaska

A magnitude 2.7 earthquake struck 115 km WSW of Adak, Alaska on Sat, Oct 21, 2023, 8:24 PM HADT (05:24 UTC), 12 km (7 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
2.7 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-10-22 05:24:24 UTC
Depth
11.6 km (7.2 mi), shallow
Epicenter
51.370° N, 178.087° 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
2.7ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
2.4ML, 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 2.1 km horizontally, 8.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
201°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 102 in the 30 days before it.

After

  1. 2.1183 km W of Adak, Alaska · 1076 days ago · 90 km deep · 91 km away
  2. 1.9110 km WSW of Adak, Alaska · 1076 days ago · 68 km deep · 33 km away
  3. 1.788 km WSW of Adak, Alaska · 1076 days ago · 30 km deep · 27 km away
  4. 1.934 km SSW of Adak, Alaska · 1076 days ago · 62 km deep · 88 km away
  5. 2.066 km SSW of Adak, Alaska · 1076 days ago · 38 km deep · 84 km away
  6. 2.1157 km WSW of Adak, Alaska · 1075 days ago · 26 km deep · 42 km away
  7. 2.8193 km WSW of Adak, Alaska · 1075 days ago · 33 km deep · 80 km away
  8. 3.6184 km WSW of Adak, Alaska · 1074 days ago · 95 km deep · 82 km away
  9. 2.6208 km WSW of Adak, Alaska · 1074 days ago · 35 km deep · 94 km away
  10. 1.695 km WSW of Adak, Alaska · 1074 days ago · 37 km deep · 21 km away
  11. 2.2184 km WSW of Adak, Alaska · 1073 days ago · 26 km deep · 71 km away
  12. 1.566 km SSW of Adak, Alaska · 1073 days ago · 21 km deep · 77 km away
  13. 3.0124 km WSW of Adak, Alaska · 1073 days ago · 33 km deep · 10 km away
  14. 1.827 km SSW of Adak, Alaska · 1072 days ago · 62 km deep · 92 km away
  15. 2.0202 km WSW of Adak, Alaska · 1072 days ago · 60 km deep · 98 km away
  16. 1.687 km W of Adak, Alaska · 1072 days ago · 5 km deep · 56 km away
  17. 2.695 km WSW of Adak, Alaska · 1072 days ago · 61 km deep · 21 km away
  18. 2.0175 km WSW of Adak, Alaska · 1071 days ago · 22 km deep · 62 km away
  19. 2.2182 km WSW of Adak, Alaska · 1071 days ago · 16 km deep · 68 km away
  20. 2.7181 km WSW of Adak, Alaska · 1071 days ago · 32 km deep · 67 km away
  21. 1.576 km WSW of Adak, Alaska · 1071 days ago · 23 km deep · 39 km away
  22. 1.693 km SW of Adak, Alaska · 1071 days ago · 40 km deep · 25 km away
  23. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1071 days ago · 19 km deep · 78 km away
  24. 3.972 km SW of Adak, Alaska · 1070 days ago · 60 km deep · 45 km away
  25. 1.551 km S of Adak, Alaska · 1070 days ago · 24 km deep · 97 km away
  26. 1.8194 km WSW of Adak, Alaska · 1070 days ago · 23 km deep · 85 km away
  27. 1.9186 km W of Adak, Alaska · 1070 days ago · 74 km deep · 88 km away
  28. 2.8170 km WSW of Adak, Alaska · 1070 days ago · 32 km deep · 62 km away
  29. 2.0124 km WSW of Adak, Alaska · 1070 days ago · 5 km deep · 22 km away
  30. 2.641 km S of Adak, Alaska · 1070 days ago · 34 km deep · 97 km away
  31. 2.194 km WSW of Adak, Alaska · 1069 days ago · 59 km deep · 21 km away
  32. 2.0118 km SW of Adak, Alaska · 1069 days ago · 21 km deep · 21 km away
  33. 2.156 km W of Adak, Alaska · 1069 days ago · 104 km deep · 73 km away
  34. 1.8154 km WSW of Adak, Alaska · 1068 days ago · 19 km deep · 41 km away
  35. 1.7133 km WSW of Adak, Alaska · 1068 days ago · 8 km deep · 42 km away
  36. 1.7117 km WSW of Adak, Alaska · 1068 days ago · 25 km deep · 8 km away
  37. 2.698 km WSW of Adak, Alaska · 1067 days ago · 68 km deep · 21 km away
  38. 2.1107 km W of Adak, Alaska · 1066 days ago · 133 km deep · 67 km away
  39. 1.527 km SW of Adak, Alaska · 1066 days ago · 70 km deep · 89 km away
  40. 3.1152 km WSW of Adak, Alaska · 1066 days ago · 35 km deep · 40 km away
  41. 1.9154 km WSW of Adak, Alaska · 1066 days ago · 75 km deep · 59 km away
  42. 2.6101 km WSW of Adak, Alaska · 1064 days ago · 60 km deep · 14 km away
  43. 3.1140 km W of Adak, Alaska · 1064 days ago · 100 km deep · 60 km away
  44. 3.243 km SSW of Adak, Alaska · 1064 days ago · 35 km deep · 92 km away
  45. 1.850 km S of Adak, Alaska · 1063 days ago · 32 km deep · 91 km away
  46. 2.1143 km W of Adak, Alaska · 1063 days ago · 94 km deep · 71 km away
  47. 2.681 km SSW of Adak, Alaska · 1061 days ago · 35 km deep · 87 km away
  48. 3.6145 km WSW of Adak, Alaska · 1060 days ago · 35 km deep · 30 km away
  49. 1.959 km WSW of Adak, Alaska · 1060 days ago · 20 km deep · 56 km away
  50. 3.5136 km WSW of Adak, Alaska · 1059 days ago · 35 km deep · 21 km away
  51. 4.144 km S of Adak, Alaska · 1059 days ago · 35 km deep · 100 km away
  52. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1058 days ago · 30 km deep · 78 km away
  53. 3.595 km WSW of Adak, Alaska · 1058 days ago · 66 km deep · 21 km away
  54. 3.0149 km WSW of Adak, Alaska · 1057 days ago · 35 km deep · 34 km away
  55. 2.9195 km WSW of Adak, Alaska · 1057 days ago · 35 km deep · 81 km away
  56. 2.638 km S of Adak, Alaska · 1057 days ago · 48 km deep · 96 km away
  57. 2.978 km SW of Adak, Alaska · 1057 days ago · 56 km deep · 45 km away
  58. 2.8134 km WSW of Adak, Alaska · 1056 days ago · 35 km deep · 19 km away
  59. 2.9212 km WSW of Adak, Alaska · 1056 days ago · 10 km deep · 98 km away
  60. 2.7150 km WSW of Adak, Alaska · 1056 days ago · 35 km deep · 36 km away

The first 60 of at least 201.

Before

  1. 1.9192 km WSW of Adak, Alaska · 1077 days ago · 18 km deep · 81 km away
  2. 1.8Andreanof Islands, Aleutian Islands, Alaska · 1077 days ago · 71 km deep · 84 km away
  3. 1.838 km SW of Adak, Alaska · 1078 days ago · 52 km deep · 77 km away
  4. 2.4180 km SW of Adak, Alaska · 1079 days ago · 10 km deep · 90 km away
  5. 1.8111 km WSW of Adak, Alaska · 1079 days ago · 13 km deep · 17 km away
  6. 1.889 km WSW of Adak, Alaska · 1079 days ago · 13 km deep · 26 km away
  7. 2.769 km SSW of Adak, Alaska · 1079 days ago · 35 km deep · 70 km away
  8. 2.250 km W of Adak, Alaska · 1079 days ago · 94 km deep · 79 km away
  9. 2.737 km SSW of Adak, Alaska · 1080 days ago · 35 km deep · 94 km away
  10. 2.962 km SSW of Adak, Alaska · 1080 days ago · 35 km deep · 70 km away
  11. 2.0132 km WSW of Adak, Alaska · 1080 days ago · 24 km deep · 17 km away
  12. 2.1131 km WSW of Adak, Alaska · 1080 days ago · 17 km deep · 17 km away
  13. 1.8135 km WSW of Adak, Alaska · 1080 days ago · 26 km deep · 21 km away
  14. 1.8132 km WSW of Adak, Alaska · 1081 days ago · 37 km deep · 22 km away
  15. 2.088 km SW of Adak, Alaska · 1081 days ago · 34 km deep · 33 km away
  16. 1.8146 km W of Adak, Alaska · 1081 days ago · 13 km deep · 53 km away
  17. 2.8130 km W of Adak, Alaska · 1081 days ago · 10 km deep · 43 km away
  18. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1082 days ago · 26 km deep · 89 km away
  19. 2.1175 km W of Adak, Alaska · 1082 days ago · 64 km deep · 77 km away
  20. 1.855 km SW of Adak, Alaska · 1082 days ago · 44 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000l9fv (also filed as ak023djynqte). Read Fri, Oct 2, 2026, 4:36 PM UTC.