Alaska earthquakes

M3.5 earthquake 231 km W of Adak, Alaska

A magnitude 3.5 earthquake struck 231 km W of Adak, Alaska on Tue, Jun 20, 2023, 8:33 AM HADT (17:33 UTC), 107 km (67 mi) below the surface.

A larger quake followed: M4.3 289 km W 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
3.5 (ml), minor
Local time
UTC
2023-06-20 17:33:44 UTC
Depth
107.1 km (66.6 mi), intermediate-depth
Epicenter
51.812° N, 179.999° 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 5.4 km horizontally, 3.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
116°
Stations used
29

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and 83 in the 30 days before it.

After

  1. 3.3259 km WSW of Adak, Alaska · 1198 days ago · 31 km deep · 46 km away
  2. 2.5265 km WSW of Adak, Alaska · 1198 days ago · 25 km deep · 55 km away
  3. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1197 days ago · 11 km deep · 33 km away
  4. 2.5194 km WSW of Adak, Alaska · 1197 days ago · 30 km deep · 78 km away
  5. 3.5261 km WSW of Adak, Alaska · 1197 days ago · 32 km deep · 80 km away
  6. 3.9Andreanof Islands, Aleutian Islands, Alaska · 1197 days ago · 102 km deep · 80 km away
  7. 3.1Rat Islands, Aleutian Islands, Alaska · 1195 days ago · 90 km deep · 90 km away
  8. 2.6231 km WSW of Adak, Alaska · 1194 days ago · 10 km deep · 88 km away
  9. 2.0Rat Islands, Aleutian Islands, Alaska · 1194 days ago · 79 km deep · 71 km away
  10. 1.7240 km WSW of Adak, Alaska · 1193 days ago · 13 km deep · 71 km away
  11. 1.9224 km WSW of Adak, Alaska · 1193 days ago · 58 km deep · 37 km away
  12. 1.9197 km WSW of Adak, Alaska · 1192 days ago · 35 km deep · 73 km away
  13. 2.0292 km WSW of Adak, Alaska · 1192 days ago · 19 km deep · 93 km away
  14. 1.7Rat Islands, Aleutian Islands, Alaska · 1192 days ago · 53 km deep · 74 km away
  15. 1.8224 km W of Adak, Alaska · 1192 days ago · 72 km deep · 21 km away
  16. 3.1136 km W of Adak, Alaska · 1192 days ago · 189 km deep · 98 km away
  17. 2.8252 km W of Adak, Alaska · 1191 days ago · 196 km deep · 24 km away
  18. 1.6258 km W of Adak, Alaska · 1190 days ago · 10 km deep · 28 km away
  19. 3.5260 km WSW of Adak, Alaska · 1190 days ago · 65 km deep · 47 km away
  20. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1190 days ago · 19 km deep · 81 km away
  21. 2.1211 km W of Adak, Alaska · 1190 days ago · 86 km deep · 22 km away
  22. 2.3255 km W of Adak, Alaska · 1190 days ago · 67 km deep · 37 km away
  23. 3.0199 km WSW of Adak, Alaska · 1189 days ago · 35 km deep · 83 km away
  24. 2.2183 km WSW of Adak, Alaska · 1189 days ago · 22 km deep · 82 km away
  25. 2.3143 km W of Adak, Alaska · 1189 days ago · 160 km deep · 94 km away
  26. 2.9172 km W of Adak, Alaska · 1189 days ago · 131 km deep · 59 km away
  27. 3.7283 km WSW of Adak, Alaska · 1189 days ago · 35 km deep · 92 km away
  28. 1.9170 km WSW of Adak, Alaska · 1189 days ago · 27 km deep · 98 km away
  29. 2.5221 km W of Adak, Alaska · 1188 days ago · 88 km deep · 20 km away
  30. 2.9Rat Islands, Aleutian Islands, Alaska · 1187 days ago · 35 km deep · 92 km away
  31. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1187 days ago · 10 km deep · 66 km away
  32. 1.7237 km WSW of Adak, Alaska · 1187 days ago · 16 km deep · 56 km away
  33. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1187 days ago · 85 km deep · 95 km away
  34. 1.7Rat Islands, Aleutian Islands, Alaska · 1187 days ago · 59 km deep · 86 km away
  35. 1.8256 km W of Adak, Alaska · 1186 days ago · 62 km deep · 37 km away
  36. 2.0240 km WSW of Adak, Alaska · 1186 days ago · 13 km deep · 76 km away
  37. 1.6207 km W of Adak, Alaska · 1186 days ago · 14 km deep · 27 km away
  38. 2.0176 km W of Adak, Alaska · 1186 days ago · 106 km deep · 55 km away
  39. 2.2Andreanof Islands, Aleutian Islands, Alaska · 1185 days ago · 19 km deep · 90 km away
  40. 3.8Rat Islands, Aleutian Islands, Alaska · 1185 days ago · 74 km deep · 65 km away
  41. 2.9237 km WSW of Adak, Alaska · 1183 days ago · 30 km deep · 59 km away
  42. 1.5253 km W of Adak, Alaska · 1183 days ago · 8 km deep · 40 km away
  43. 1.9Rat Islands, Aleutian Islands, Alaska · 1182 days ago · 65 km deep · 91 km away
  44. 2.5187 km W of Adak, Alaska · 1182 days ago · 10 km deep · 45 km away
  45. 3.0228 km W of Adak, Alaska · 1182 days ago · 198 km deep · 31 km away
  46. 3.4243 km W of Adak, Alaska · 1182 days ago · 72 km deep · 31 km away
  47. 3.6Rat Islands, Aleutian Islands, Alaska · 1182 days ago · 61 km deep · 94 km away
  48. 2.6230 km W of Adak, Alaska · 1181 days ago · 107 km deep · 2 km away
  49. 2.0225 km W of Adak, Alaska · 1181 days ago · 67 km deep · 29 km away
  50. 3.0264 km W of Adak, Alaska · 1181 days ago · 176 km deep · 39 km away
  51. 1.8226 km W of Adak, Alaska · 1181 days ago · 65 km deep · 28 km away
  52. 1.8154 km WSW of Adak, Alaska · 1181 days ago · 66 km deep · 89 km away
  53. 2.0195 km WSW of Adak, Alaska · 1181 days ago · 66 km deep · 50 km away
  54. 2.8169 km WSW of Adak, Alaska · 1180 days ago · 10 km deep · 87 km away
  55. 3.1219 km WSW of Adak, Alaska · 1180 days ago · 64 km deep · 37 km away
  56. 1.5166 km W of Adak, Alaska · 1180 days ago · 17 km deep · 67 km away
  57. 2.7290 km W of Adak, Alaska · 1179 days ago · 114 km deep · 58 km away
  58. 1.9210 km W of Adak, Alaska · 1179 days ago · 76 km deep · 26 km away
  59. 1.7239 km WSW of Adak, Alaska · 1179 days ago · 60 km deep · 36 km away
  60. 3.4175 km WSW of Adak, Alaska · 1178 days ago · 33 km deep · 81 km away

The first 60 of 190.

Before

  1. 2.0Rat Islands, Aleutian Islands, Alaska · 1200 days ago · 17 km deep · 52 km away
  2. 1.8255 km WSW of Adak, Alaska · 1201 days ago · 5 km deep · 50 km away
  3. 1.8225 km W of Adak, Alaska · 1201 days ago · 14 km deep · 9 km away
  4. 1.8226 km WSW of Adak, Alaska · 1201 days ago · 23 km deep · 46 km away
  5. 1.7181 km WSW of Adak, Alaska · 1202 days ago · 44 km deep · 89 km away
  6. 1.9172 km WSW of Adak, Alaska · 1202 days ago · 16 km deep · 83 km away
  7. 2.0149 km W of Adak, Alaska · 1202 days ago · 120 km deep · 83 km away
  8. 3.1189 km WSW of Adak, Alaska · 1202 days ago · 74 km deep · 59 km away
  9. 3.5193 km WSW of Adak, Alaska · 1202 days ago · 35 km deep · 99 km away
  10. 2.8221 km WSW of Adak, Alaska · 1202 days ago · 35 km deep · 60 km away
  11. 1.7292 km WSW of Adak, Alaska · 1202 days ago · 43 km deep · 73 km away
  12. 2.1229 km W of Adak, Alaska · 1203 days ago · 157 km deep · 25 km away
  13. 1.6Rat Islands, Aleutian Islands, Alaska · 1203 days ago · 66 km deep · 82 km away
  14. 2.1182 km W of Adak, Alaska · 1203 days ago · 97 km deep · 50 km away
  15. 1.6221 km WSW of Adak, Alaska · 1203 days ago · 13 km deep · 56 km away
  16. 2.0Rat Islands, Aleutian Islands, Alaska · 1203 days ago · 86 km deep · 95 km away
  17. 3.7225 km W of Adak, Alaska · 1204 days ago · 129 km deep · 11 km away
  18. 3.6245 km W of Adak, Alaska · 1204 days ago · 96 km deep · 23 km away
  19. 2.9Rat Islands, Aleutian Islands, Alaska · 1204 days ago · 28 km deep · 99 km away
  20. 2.0Rat Islands, Aleutian Islands, Alaska · 1204 days ago · 62 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kapc (also filed as ak0237v37vwk). Read Thu, Oct 1, 2026, 1:58 AM UTC.