Alaska earthquakes

M3.4 earthquake 269 km W of Adak, Alaska

A magnitude 3.4 earthquake struck 269 km W of Adak, Alaska on Sat, Jul 22, 2023, 12:36 PM GMT+12 (00:36 UTC), 164 km (102 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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Map

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

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The earthquake

Magnitude
3.4 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-07-22 00:36:31 UTC
Depth
163.5 km (101.6 mi), intermediate-depth
Epicenter
51.865° N, 179.447° E
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
3.4ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 26 stations
3.0ML, 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 8.1 km horizontally, 3.1 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
95°
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and 86 in the 30 days before it.

After

  1. 3.8Rat Islands, Aleutian Islands, Alaska · 1166 days ago · 48 km deep · 66 km away
  2. 2.0Rat Islands, Aleutian Islands, Alaska · 1166 days ago · 56 km deep · 56 km away
  3. 2.9Rat Islands, Aleutian Islands, Alaska · 1166 days ago · 27 km deep · 92 km away
  4. 2.8277 km W of Adak, Alaska · 1166 days ago · 178 km deep · 8 km away
  5. 2.0291 km WSW of Adak, Alaska · 1166 days ago · 17 km deep · 90 km away
  6. 2.7243 km WSW of Adak, Alaska · 1166 days ago · 65 km deep · 71 km away
  7. 2.0210 km W of Adak, Alaska · 1165 days ago · 83 km deep · 67 km away
  8. 2.7Rat Islands, Aleutian Islands, Alaska · 1165 days ago · 113 km deep · 52 km away
  9. 3.0Rat Islands, Aleutian Islands, Alaska · 1164 days ago · 35 km deep · 73 km away
  10. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1164 days ago · 86 km deep · 61 km away
  11. 2.2Rat Islands, Aleutian Islands, Alaska · 1163 days ago · 118 km deep · 73 km away
  12. 1.7178 km W of Adak, Alaska · 1163 days ago · 7 km deep · 94 km away
  13. 2.2Rat Islands, Aleutian Islands, Alaska · 1162 days ago · 129 km deep · 78 km away
  14. 1.7Rat Islands, Aleutian Islands, Alaska · 1162 days ago · 79 km deep · 53 km away
  15. 1.8208 km W of Adak, Alaska · 1162 days ago · 88 km deep · 63 km away
  16. 1.5235 km WSW of Adak, Alaska · 1162 days ago · 13 km deep · 65 km away
  17. 1.5238 km WSW of Adak, Alaska · 1161 days ago · 13 km deep · 65 km away
  18. 2.6252 km WSW of Adak, Alaska · 1161 days ago · 10 km deep · 71 km away
  19. 2.0235 km WSW of Adak, Alaska · 1161 days ago · 13 km deep · 65 km away
  20. 1.8242 km WSW of Adak, Alaska · 1161 days ago · 13 km deep · 99 km away
  21. 2.8Rat Islands, Aleutian Islands, Alaska · 1161 days ago · 63 km deep · 71 km away
  22. 1.9Rat Islands, Aleutian Islands, Alaska · 1161 days ago · 58 km deep · 47 km away
  23. 1.8179 km W of Adak, Alaska · 1160 days ago · 85 km deep · 90 km away
  24. 3.9Rat Islands, Aleutian Islands, Alaska · 1160 days ago · 64 km deep · 74 km away
  25. 1.9211 km WSW of Adak, Alaska · 1159 days ago · 26 km deep · 96 km away
  26. 1.8Rat Islands, Aleutian Islands, Alaska · 1159 days ago · 39 km deep · 67 km away
  27. 1.7Rat Islands, Aleutian Islands, Alaska · 1159 days ago · 66 km deep · 49 km away
  28. 1.7265 km W of Adak, Alaska · 1159 days ago · 82 km deep · 6 km away
  29. 2.2224 km W of Adak, Alaska · 1158 days ago · 14 km deep · 45 km away
  30. 4.3289 km W of Adak, Alaska · 1158 days ago · 193 km deep · 55 km away
  31. 2.8Rat Islands, Aleutian Islands, Alaska · 1158 days ago · 110 km deep · 84 km away
  32. 1.9246 km WSW of Adak, Alaska · 1157 days ago · 21 km deep · 67 km away
  33. 1.7Rat Islands, Aleutian Islands, Alaska · 1157 days ago · 60 km deep · 47 km away
  34. 3.0Rat Islands, Aleutian Islands, Alaska · 1157 days ago · 35 km deep · 72 km away
  35. 1.9238 km WSW of Adak, Alaska · 1156 days ago · 21 km deep · 64 km away
  36. 2.7192 km W of Adak, Alaska · 1155 days ago · 105 km deep · 77 km away
  37. 2.8Rat Islands, Aleutian Islands, Alaska · 1154 days ago · 69 km deep · 84 km away
  38. 4.0Rat Islands, Aleutian Islands, Alaska · 1154 days ago · 116 km deep · 84 km away
  39. 3.3Rat Islands, Aleutian Islands, Alaska · 1153 days ago · 101 km deep · 57 km away
  40. 2.0Rat Islands, Aleutian Islands, Alaska · 1152 days ago · 29 km deep · 72 km away
  41. 2.9Rat Islands, Aleutian Islands, Alaska · 1152 days ago · 63 km deep · 52 km away
  42. 2.0211 km WSW of Adak, Alaska · 1151 days ago · 42 km deep · 87 km away
  43. 1.9254 km WSW of Adak, Alaska · 1150 days ago · 14 km deep · 94 km away
  44. 1.6259 km W of Adak, Alaska · 1150 days ago · 60 km deep · 46 km away
  45. 1.8240 km WSW of Adak, Alaska · 1150 days ago · 66 km deep · 54 km away
  46. 1.9Rat Islands, Aleutian Islands, Alaska · 1150 days ago · 57 km deep · 49 km away
  47. 2.7Rat Islands, Aleutian Islands, Alaska · 1149 days ago · 20 km deep · 55 km away
  48. 1.8Rat Islands, Aleutian Islands, Alaska · 1149 days ago · 13 km deep · 52 km away
  49. 2.1192 km WSW of Adak, Alaska · 1148 days ago · 68 km deep · 89 km away
  50. 1.5178 km W of Adak, Alaska · 1148 days ago · 9 km deep · 97 km away
  51. 2.3244 km WSW of Adak, Alaska · 1147 days ago · 26 km deep · 93 km away
  52. 2.7Rat Islands, Aleutian Islands, Alaska · 1147 days ago · 97 km deep · 72 km away
  53. 2.0258 km WSW of Adak, Alaska · 1146 days ago · 5 km deep · 56 km away
  54. 2.8Rat Islands, Aleutian Islands, Alaska · 1146 days ago · 57 km deep · 66 km away
  55. 1.8Rat Islands, Aleutian Islands, Alaska · 1146 days ago · 51 km deep · 59 km away
  56. 1.9Rat Islands, Aleutian Islands, Alaska · 1146 days ago · 93 km deep · 63 km away
  57. 2.9Rat Islands, Aleutian Islands, Alaska · 1146 days ago · 28 km deep · 85 km away
  58. 2.7263 km W of Adak, Alaska · 1146 days ago · 196 km deep · 25 km away
  59. 1.6Rat Islands, Aleutian Islands, Alaska · 1146 days ago · 20 km deep · 77 km away
  60. 1.6241 km WSW of Adak, Alaska · 1145 days ago · 13 km deep · 74 km away

The first 60 of 190.

Before

  1. 2.7Rat Islands, Aleutian Islands, Alaska · 1167 days ago · 104 km deep · 63 km away
  2. 1.9Rat Islands, Aleutian Islands, Alaska · 1168 days ago · 63 km deep · 53 km away
  3. 2.7Rat Islands, Aleutian Islands, Alaska · 1168 days ago · 79 km deep · 95 km away
  4. 2.6Rat Islands, Aleutian Islands, Alaska · 1168 days ago · 111 km deep · 80 km away
  5. 4.9Rat Islands, Aleutian Islands, Alaska · 1169 days ago · 115 km deep · 73 km away
  6. 2.2287 km W of Adak, Alaska · 1170 days ago · 79 km deep · 24 km away
  7. 3.6252 km WSW of Adak, Alaska · 1170 days ago · 56 km deep · 63 km away
  8. 1.9198 km W of Adak, Alaska · 1171 days ago · 75 km deep · 76 km away
  9. 1.9267 km WSW of Adak, Alaska · 1171 days ago · 15 km deep · 84 km away
  10. 2.1Rat Islands, Aleutian Islands, Alaska · 1172 days ago · 15 km deep · 95 km away
  11. 3.5Rat Islands, Aleutian Islands, Alaska · 1173 days ago · 67 km deep · 54 km away
  12. 2.8Rat Islands, Aleutian Islands, Alaska · 1174 days ago · 25 km deep · 93 km away
  13. 2.6268 km W of Adak, Alaska · 1174 days ago · 113 km deep · 2 km away
  14. 3.1297 km WSW of Adak, Alaska · 1174 days ago · 29 km deep · 80 km away
  15. 1.9294 km WSW of Adak, Alaska · 1174 days ago · 20 km deep · 88 km away
  16. 2.9299 km W of Adak, Alaska · 1175 days ago · 180 km deep · 37 km away
  17. 2.8270 km W of Adak, Alaska · 1175 days ago · 79 km deep · 28 km away
  18. 2.7198 km W of Adak, Alaska · 1175 days ago · 88 km deep · 74 km away
  19. 2.9Rat Islands, Aleutian Islands, Alaska · 1175 days ago · 26 km deep · 96 km away
  20. 3.7199 km WSW of Adak, Alaska · 1175 days ago · 34 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kw49 (also filed as ak0239bqb8ke). Read Thu, Oct 1, 2026, 8:48 AM UTC.