Alaska earthquakes

M3.5 earthquake 260 km WSW of Adak, Alaska

A magnitude 3.5 earthquake struck 260 km WSW of Adak, Alaska on Thu, Jun 29, 2023, 7:44 PM GMT+12 (07:44 UTC), 65 km (41 mi) below the surface.

A larger quake followed: M4.0 229 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
3.5 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-06-29 07:44:40 UTC
Depth
65.3 km (40.6 mi), shallow
Epicenter
51.451° N, 179.657° 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
3.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.074 · 24 stations
3.1ML, 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 10.2 km horizontally, 21.4 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
168°
Stations used
35

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 85 in the 30 days before it.

After

  1. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1193 days ago · 19 km deep · 54 km away
  2. 2.1211 km W of Adak, Alaska · 1193 days ago · 86 km deep · 56 km away
  3. 2.3255 km W of Adak, Alaska · 1193 days ago · 67 km deep · 10 km away
  4. 3.0199 km WSW of Adak, Alaska · 1193 days ago · 35 km deep · 77 km away
  5. 2.2183 km WSW of Adak, Alaska · 1193 days ago · 22 km deep · 86 km away
  6. 2.9172 km W of Adak, Alaska · 1192 days ago · 131 km deep · 96 km away
  7. 3.7283 km WSW of Adak, Alaska · 1192 days ago · 35 km deep · 46 km away
  8. 2.5221 km W of Adak, Alaska · 1191 days ago · 88 km deep · 43 km away
  9. 2.9Rat Islands, Aleutian Islands, Alaska · 1191 days ago · 35 km deep · 50 km away
  10. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1190 days ago · 10 km deep · 95 km away
  11. 1.7237 km WSW of Adak, Alaska · 1190 days ago · 16 km deep · 32 km away
  12. 1.7Rat Islands, Aleutian Islands, Alaska · 1190 days ago · 59 km deep · 58 km away
  13. 1.9Rat Islands, Aleutian Islands, Alaska · 1190 days ago · 98 km deep · 90 km away
  14. 1.8256 km W of Adak, Alaska · 1190 days ago · 62 km deep · 11 km away
  15. 2.0240 km WSW of Adak, Alaska · 1190 days ago · 13 km deep · 48 km away
  16. 1.9Rat Islands, Aleutian Islands, Alaska · 1190 days ago · 16 km deep · 85 km away
  17. 1.6207 km W of Adak, Alaska · 1189 days ago · 14 km deep · 58 km away
  18. 2.0176 km W of Adak, Alaska · 1189 days ago · 106 km deep · 92 km away
  19. 2.2Andreanof Islands, Aleutian Islands, Alaska · 1188 days ago · 19 km deep · 84 km away
  20. 3.8Rat Islands, Aleutian Islands, Alaska · 1188 days ago · 74 km deep · 44 km away
  21. 2.9237 km WSW of Adak, Alaska · 1186 days ago · 30 km deep · 35 km away
  22. 1.5253 km W of Adak, Alaska · 1186 days ago · 8 km deep · 8 km away
  23. 1.9Rat Islands, Aleutian Islands, Alaska · 1186 days ago · 65 km deep · 66 km away
  24. 2.5187 km W of Adak, Alaska · 1185 days ago · 10 km deep · 76 km away
  25. 3.0228 km W of Adak, Alaska · 1185 days ago · 198 km deep · 77 km away
  26. 3.4243 km W of Adak, Alaska · 1185 days ago · 72 km deep · 19 km away
  27. 3.6Rat Islands, Aleutian Islands, Alaska · 1185 days ago · 61 km deep · 71 km away
  28. 2.6230 km W of Adak, Alaska · 1185 days ago · 107 km deep · 46 km away
  29. 2.0225 km W of Adak, Alaska · 1184 days ago · 67 km deep · 36 km away
  30. 3.0264 km W of Adak, Alaska · 1184 days ago · 176 km deep · 63 km away
  31. 2.0Rat Islands, Aleutian Islands, Alaska · 1184 days ago · 21 km deep · 64 km away
  32. 1.8226 km W of Adak, Alaska · 1184 days ago · 65 km deep · 35 km away
  33. 2.0195 km WSW of Adak, Alaska · 1184 days ago · 66 km deep · 65 km away
  34. 2.8169 km WSW of Adak, Alaska · 1184 days ago · 10 km deep · 97 km away
  35. 3.1219 km WSW of Adak, Alaska · 1184 days ago · 64 km deep · 41 km away
  36. 1.8Rat Islands, Aleutian Islands, Alaska · 1183 days ago · 14 km deep · 66 km away
  37. 1.5166 km W of Adak, Alaska · 1183 days ago · 17 km deep · 95 km away
  38. 3.7Rat Islands, Aleutian Islands, Alaska · 1183 days ago · 35 km deep · 87 km away
  39. 2.7290 km W of Adak, Alaska · 1183 days ago · 114 km deep · 53 km away
  40. 1.6Rat Islands, Aleutian Islands, Alaska · 1182 days ago · 7 km deep · 63 km away
  41. 1.9210 km W of Adak, Alaska · 1182 days ago · 76 km deep · 54 km away
  42. 1.7239 km WSW of Adak, Alaska · 1182 days ago · 60 km deep · 21 km away
  43. 3.4175 km WSW of Adak, Alaska · 1182 days ago · 33 km deep · 90 km away
  44. 3.1214 km WSW of Adak, Alaska · 1182 days ago · 16 km deep · 81 km away
  45. 2.2Rat Islands, Aleutian Islands, Alaska · 1181 days ago · 70 km deep · 67 km away
  46. 1.9289 km WSW of Adak, Alaska · 1181 days ago · 26 km deep · 28 km away
  47. 2.3Rat Islands, Aleutian Islands, Alaska · 1181 days ago · 103 km deep · 92 km away
  48. 2.3Rat Islands, Aleutian Islands, Alaska · 1181 days ago · 41 km deep · 100 km away
  49. 1.8234 km WSW of Adak, Alaska · 1181 days ago · 13 km deep · 56 km away
  50. 1.7Rat Islands, Aleutian Islands, Alaska · 1181 days ago · 81 km deep · 76 km away
  51. 3.0Rat Islands, Aleutian Islands, Alaska · 1181 days ago · 56 km deep · 65 km away
  52. 1.5172 km WSW of Adak, Alaska · 1181 days ago · 20 km deep · 96 km away
  53. 3.8Rat Islands, Aleutian Islands, Alaska · 1180 days ago · 26 km deep · 62 km away
  54. 2.7237 km WSW of Adak, Alaska · 1180 days ago · 35 km deep · 36 km away
  55. 2.8Rat Islands, Aleutian Islands, Alaska · 1180 days ago · 17 km deep · 78 km away
  56. 2.2199 km WSW of Adak, Alaska · 1179 days ago · 62 km deep · 62 km away
  57. 2.6Rat Islands, Aleutian Islands, Alaska · 1178 days ago · 35 km deep · 92 km away
  58. 3.7199 km WSW of Adak, Alaska · 1178 days ago · 34 km deep · 66 km away
  59. 2.9Rat Islands, Aleutian Islands, Alaska · 1178 days ago · 26 km deep · 62 km away
  60. 2.7198 km W of Adak, Alaska · 1178 days ago · 88 km deep · 65 km away

The first 60 of at least 199.

Before

  1. 1.6258 km W of Adak, Alaska · 1194 days ago · 10 km deep · 47 km away
  2. 2.8252 km W of Adak, Alaska · 1194 days ago · 196 km deep · 51 km away
  3. 3.3191 km WSW of Adak, Alaska · 1194 days ago · 26 km deep · 95 km away
  4. 2.0Rat Islands, Aleutian Islands, Alaska · 1195 days ago · 13 km deep · 72 km away
  5. 1.8224 km W of Adak, Alaska · 1195 days ago · 72 km deep · 40 km away
  6. 1.7Rat Islands, Aleutian Islands, Alaska · 1195 days ago · 53 km deep · 44 km away
  7. 2.0292 km WSW of Adak, Alaska · 1196 days ago · 19 km deep · 46 km away
  8. 1.9197 km WSW of Adak, Alaska · 1196 days ago · 35 km deep · 73 km away
  9. 1.9224 km WSW of Adak, Alaska · 1196 days ago · 58 km deep · 36 km away
  10. 1.7240 km WSW of Adak, Alaska · 1196 days ago · 13 km deep · 43 km away
  11. 1.8Rat Islands, Aleutian Islands, Alaska · 1197 days ago · 86 km deep · 84 km away
  12. 2.0Rat Islands, Aleutian Islands, Alaska · 1197 days ago · 79 km deep · 55 km away
  13. 2.6231 km WSW of Adak, Alaska · 1197 days ago · 10 km deep · 64 km away
  14. 3.1Rat Islands, Aleutian Islands, Alaska · 1199 days ago · 90 km deep · 74 km away
  15. 3.5261 km WSW of Adak, Alaska · 1200 days ago · 32 km deep · 40 km away
  16. 2.5194 km WSW of Adak, Alaska · 1200 days ago · 30 km deep · 77 km away
  17. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1201 days ago · 11 km deep · 29 km away
  18. 2.5265 km WSW of Adak, Alaska · 1201 days ago · 25 km deep · 8 km away
  19. 3.3259 km WSW of Adak, Alaska · 1201 days ago · 31 km deep · 2 km away
  20. 3.5231 km W of Adak, Alaska · 1202 days ago · 107 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kqah (also filed as ak02389t60gm). Read Sun, Oct 4, 2026, 8:06 AM UTC.