Alaska earthquakes

M3.4 earthquake 75 km S of Unalaska, Alaska

A magnitude 3.4 earthquake struck 75 km S of Unalaska, Alaska on Tue, Aug 22, 2023, 7:35 AM AKDT (15:35 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.3 96 km S of Unalaska, Alaska. This one was a foreshock.

Unalaska forecastMore in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.4 (mb), minor
Local time
UTC
2023-08-22 15:35:39 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
53.205° N, 166.744° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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 2.9 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.28
Depth from
Operator assigned
Station coverage gap
200°, poorly surrounded by stations
Stations used
26

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 87 in the 30 days before it.

After

  1. 1.753 km SE of Unalaska, Alaska · 1134 days ago · 42 km deep · 67 km away
  2. 2.075 km SSW of Unalaska, Alaska · 1133 days ago · 31 km deep · 7 km away
  3. 2.3146 km ESE of Nikolski, Alaska · 1133 days ago · 25 km deep · 79 km away
  4. 3.637 km W of Dutch Harbor, Alaska · 1133 days ago · 114 km deep · 75 km away
  5. 2.9Fox Islands, Aleutian Islands, Alaska · 1133 days ago · 35 km deep · 10 km away
  6. 1.756 km SW of Unalaska, Alaska · 1132 days ago · 17 km deep · 53 km away
  7. 1.885 km S of Unalaska, Alaska · 1132 days ago · 20 km deep · 12 km away
  8. 3.356 km SSE of Unalaska, Alaska · 1131 days ago · 35 km deep · 44 km away
  9. 1.882 km SSW of Unalaska, Alaska · 1131 days ago · 43 km deep · 20 km away
  10. 3.266 km E of Nikolski, Alaska · 1130 days ago · 35 km deep · 83 km away
  11. 1.9115 km SSE of Unalaska, Alaska · 1129 days ago · 7 km deep · 78 km away
  12. 2.2Fox Islands, Aleutian Islands, Alaska · 1129 days ago · 78 km deep · 88 km away
  13. 1.654 km SW of Unalaska, Alaska · 1129 days ago · 66 km deep · 36 km away
  14. 1.8Fox Islands, Aleutian Islands, Alaska · 1129 days ago · 10 km deep · 34 km away
  15. 2.570 km SSW of Unalaska, Alaska · 1128 days ago · 37 km deep · 30 km away
  16. 2.066 km SE of Unalaska, Alaska · 1127 days ago · 26 km deep · 69 km away
  17. 2.071 km S of Akutan, Alaska · 1127 days ago · 32 km deep · 81 km away
  18. 3.146 km ESE of Unalaska, Alaska · 1127 days ago · 60 km deep · 81 km away
  19. 3.067 km SE of Unalaska, Alaska · 1126 days ago · 35 km deep · 68 km away
  20. 2.124 km SSE of Unalaska, Alaska · 1123 days ago · 79 km deep · 55 km away
  21. 2.655 km SE of Unalaska, Alaska · 1123 days ago · 35 km deep · 67 km away
  22. 2.349 km E of Nikolski, Alaska · 1122 days ago · 36 km deep · 95 km away
  23. 1.9120 km SSE of Unalaska, Alaska · 1121 days ago · 24 km deep · 78 km away
  24. 1.9Fox Islands, Aleutian Islands, Alaska · 1120 days ago · 67 km deep · 75 km away
  25. 3.295 km E of Nikolski, Alaska · 1120 days ago · 35 km deep · 66 km away
  26. 1.893 km E of Nikolski, Alaska · 1120 days ago · 53 km deep · 61 km away
  27. 2.3138 km ESE of Nikolski, Alaska · 1120 days ago · 13 km deep · 93 km away
  28. 1.577 km WSW of Unalaska, Alaska · 1120 days ago · 13 km deep · 66 km away
  29. 1.678 km S of Unalaska, Alaska · 1120 days ago · 26 km deep · 4 km away
  30. 2.2132 km ESE of Nikolski, Alaska · 1120 days ago · 10 km deep · 63 km away
  31. 1.65 km N of Dutch Harbor, Alaska · 1119 days ago · 9 km deep · 82 km away
  32. 1.576 km S of Unalaska, Alaska · 1119 days ago · 23 km deep · 3 km away
  33. 1.679 km E of Nikolski, Alaska · 1119 days ago · 55 km deep · 68 km away
  34. 1.9118 km S of Unalaska, Alaska · 1119 days ago · 15 km deep · 42 km away
  35. 1.662 km S of Akutan, Alaska · 1119 days ago · 60 km deep · 80 km away
  36. 2.0125 km ESE of Nikolski, Alaska · 1119 days ago · 19 km deep · 57 km away
  37. 2.793 km E of Nikolski, Alaska · 1119 days ago · 51 km deep · 66 km away
  38. 1.982 km SSW of Unalaska, Alaska · 1118 days ago · 29 km deep · 8 km away
  39. 1.989 km SSW of Unalaska, Alaska · 1118 days ago · 26 km deep · 25 km away
  40. 1.96 km NNW of Dutch Harbor, Alaska · 1118 days ago · 10 km deep · 83 km away
  41. 1.579 km SW of Unalaska, Alaska · 1118 days ago · 20 km deep · 40 km away
  42. 1.675 km SW of Unalaska, Alaska · 1117 days ago · 26 km deep · 40 km away
  43. 3.664 km E of Nikolski, Alaska · 1117 days ago · 35 km deep · 84 km away
  44. 2.152 km S of Unalaska, Alaska · 1116 days ago · 56 km deep · 26 km away
  45. 2.641 km SSE of Akutan, Alaska · 1115 days ago · 68 km deep · 97 km away
  46. 1.5Fox Islands, Aleutian Islands, Alaska · 1115 days ago · 13 km deep · 37 km away
  47. 2.587 km SW of Unalaska, Alaska · 1115 days ago · 34 km deep · 53 km away
  48. 1.880 km SSW of Unalaska, Alaska · 1114 days ago · 56 km deep · 32 km away
  49. 2.146 km ENE of Nikolski, Alaska · 1114 days ago · 102 km deep · 100 km away
  50. 2.179 km SSE of Akutan, Alaska · 1113 days ago · 37 km deep · 85 km away
  51. 1.9Fox Islands, Aleutian Islands, Alaska · 1113 days ago · 19 km deep · 61 km away
  52. 1.8103 km E of Nikolski, Alaska · 1113 days ago · 31 km deep · 55 km away
  53. 2.0101 km E of Nikolski, Alaska · 1113 days ago · 32 km deep · 47 km away
  54. 2.793 km ENE of Nikolski, Alaska · 1113 days ago · 64 km deep · 52 km away
  55. 1.684 km SSW of Unalaska, Alaska · 1113 days ago · 26 km deep · 14 km away
  56. 2.886 km SSW of Unalaska, Alaska · 1112 days ago · 35 km deep · 12 km away
  57. 2.132 km W of Dutch Harbor, Alaska · 1112 days ago · 114 km deep · 77 km away
  58. 1.899 km E of Nikolski, Alaska · 1112 days ago · 39 km deep · 46 km away
  59. 2.041 km SSW of Unalaska, Alaska · 1112 days ago · 66 km deep · 35 km away
  60. 1.749 km SW of Unalaska, Alaska · 1112 days ago · 20 km deep · 47 km away

The first 60 of 135.

Before

  1. 2.079 km SSW of Unalaska, Alaska · 1135 days ago · 44 km deep · 7 km away
  2. 1.866 km E of Nikolski, Alaska · 1136 days ago · 63 km deep · 78 km away
  3. 1.571 km WSW of Unalaska, Alaska · 1138 days ago · 8 km deep · 58 km away
  4. 1.739 km S of Akutan, Alaska · 1138 days ago · 66 km deep · 94 km away
  5. 1.655 km SW of Unalaska, Alaska · 1138 days ago · 16 km deep · 51 km away
  6. 1.638 km W of Dutch Harbor, Alaska · 1139 days ago · 92 km deep · 79 km away
  7. 1.694 km E of Nikolski, Alaska · 1140 days ago · 52 km deep · 50 km away
  8. 1.9Fox Islands, Aleutian Islands, Alaska · 1140 days ago · 55 km deep · 100 km away
  9. 1.518 km WSW of Dutch Harbor, Alaska · 1140 days ago · 6 km deep · 71 km away
  10. 1.616 km WSW of Dutch Harbor, Alaska · 1141 days ago · 7 km deep · 72 km away
  11. 2.881 km SE of Unalaska, Alaska · 1142 days ago · 35 km deep · 74 km away
  12. 1.670 km SSE of Unalaska, Alaska · 1142 days ago · 25 km deep · 46 km away
  13. 2.679 km SSE of Akutan, Alaska · 1143 days ago · 17 km deep · 100 km away
  14. 3.182 km SSE of Akutan, Alaska · 1143 days ago · 31 km deep · 99 km away
  15. 1.916 km SE of Unalaska, Alaska · 1143 days ago · 78 km deep · 70 km away
  16. 2.566 km S of Unalaska, Alaska · 1143 days ago · 35 km deep · 25 km away
  17. 3.153 km SW of Unalaska, Alaska · 1144 days ago · 18 km deep · 35 km away
  18. 3.1Fox Islands, Aleutian Islands, Alaska · 1144 days ago · 35 km deep · 76 km away
  19. 1.774 km S of Unalaska, Alaska · 1145 days ago · 19 km deep · 1 km away
  20. 1.868 km S of Akutan, Alaska · 1145 days ago · 21 km deep · 79 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000krwr (also filed as ak023ar8wava). Read Wed, Sep 30, 2026, 5:08 AM UTC.