Alaska earthquakes

M3.0 earthquake 261 km WSW of Adak, Alaska

A magnitude 3.0 earthquake struck 261 km WSW of Adak, Alaska on Tue, Aug 15, 2023, 3:09 PM GMT+12 (03:09 UTC), 28 km (18 mi) below the surface.

A larger quake followed: M4.2 Rat Islands, Aleutian Islands, 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
3.0 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-08-15 03:09:59 UTC
Depth
28.4 km (17.6 mi), shallow
Epicenter
51.230° N, 179.735° 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
3.0ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.081 · 20 stations
2.8ML, 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 6.1 km horizontally, 13.5 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
225°, poorly surrounded by stations
Stations used
38

Nearby

Within 100 km, magnitude 1.5 and up: 166 in the 60 days after this one and 88 in the 30 days before it.

After

  1. 2.0Rat Islands, Aleutian Islands, Alaska · 1147 days ago · 44 km deep · 87 km away
  2. 2.0230 km W of Adak, Alaska · 1147 days ago · 102 km deep · 69 km away
  3. 1.9230 km WSW of Adak, Alaska · 1147 days ago · 13 km deep · 32 km away
  4. 1.6Rat Islands, Aleutian Islands, Alaska · 1147 days ago · 25 km deep · 68 km away
  5. 1.8287 km WSW of Adak, Alaska · 1146 days ago · 6 km deep · 27 km away
  6. 1.6189 km WSW of Adak, Alaska · 1146 days ago · 64 km deep · 73 km away
  7. 1.7186 km WSW of Adak, Alaska · 1146 days ago · 25 km deep · 85 km away
  8. 4.0229 km W of Adak, Alaska · 1145 days ago · 223 km deep · 100 km away
  9. 1.9275 km WSW of Adak, Alaska · 1145 days ago · 20 km deep · 22 km away
  10. 2.8264 km W of Adak, Alaska · 1145 days ago · 154 km deep · 76 km away
  11. 2.6296 km W of Adak, Alaska · 1145 days ago · 59 km deep · 54 km away
  12. 1.8Rat Islands, Aleutian Islands, Alaska · 1145 days ago · 13 km deep · 76 km away
  13. 2.5Rat Islands, Aleutian Islands, Alaska · 1145 days ago · 27 km deep · 46 km away
  14. 2.1208 km WSW of Adak, Alaska · 1144 days ago · 26 km deep · 54 km away
  15. 2.1206 km WSW of Adak, Alaska · 1144 days ago · 26 km deep · 55 km away
  16. 2.0292 km WSW of Adak, Alaska · 1144 days ago · 20 km deep · 32 km away
  17. 1.7232 km W of Adak, Alaska · 1144 days ago · 13 km deep · 58 km away
  18. 3.2236 km W of Adak, Alaska · 1144 days ago · 68 km deep · 37 km away
  19. 1.9264 km WSW of Adak, Alaska · 1144 days ago · 12 km deep · 14 km away
  20. 2.1Rat Islands, Aleutian Islands, Alaska · 1143 days ago · 28 km deep · 64 km away
  21. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1141 days ago · 23 km deep · 95 km away
  22. 3.9233 km W of Adak, Alaska · 1141 days ago · 19 km deep · 58 km away
  23. 2.0235 km W of Adak, Alaska · 1141 days ago · 13 km deep · 59 km away
  24. 1.9235 km W of Adak, Alaska · 1141 days ago · 13 km deep · 59 km away
  25. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1141 days ago · 37 km deep · 92 km away
  26. 1.9Rat Islands, Aleutian Islands, Alaska · 1141 days ago · 13 km deep · 62 km away
  27. 2.1284 km WSW of Adak, Alaska · 1141 days ago · 56 km deep · 37 km away
  28. 2.5Rat Islands, Aleutian Islands, Alaska · 1140 days ago · 35 km deep · 77 km away
  29. 1.8171 km WSW of Adak, Alaska · 1140 days ago · 32 km deep · 91 km away
  30. 2.8Rat Islands, Aleutian Islands, Alaska · 1140 days ago · 98 km deep · 54 km away
  31. 3.8245 km WSW of Adak, Alaska · 1140 days ago · 68 km deep · 21 km away
  32. 1.7242 km WSW of Adak, Alaska · 1140 days ago · 52 km deep · 24 km away
  33. 1.5Rat Islands, Aleutian Islands, Alaska · 1140 days ago · 45 km deep · 100 km away
  34. 3.8Rat Islands, Aleutian Islands, Alaska · 1140 days ago · 78 km deep · 84 km away
  35. 3.8244 km WSW of Adak, Alaska · 1139 days ago · 52 km deep · 19 km away
  36. 2.2243 km WSW of Adak, Alaska · 1139 days ago · 57 km deep · 24 km away
  37. 2.1242 km WSW of Adak, Alaska · 1139 days ago · 60 km deep · 25 km away
  38. 3.6Rat Islands, Aleutian Islands, Alaska · 1139 days ago · 71 km deep · 86 km away
  39. 1.6234 km WSW of Adak, Alaska · 1138 days ago · 16 km deep · 38 km away
  40. 1.5257 km W of Adak, Alaska · 1138 days ago · 4 km deep · 78 km away
  41. 1.9Rat Islands, Aleutian Islands, Alaska · 1138 days ago · 18 km deep · 92 km away
  42. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1138 days ago · 35 km deep · 65 km away
  43. 1.5170 km WSW of Adak, Alaska · 1138 days ago · 29 km deep · 92 km away
  44. 1.7194 km WSW of Adak, Alaska · 1138 days ago · 17 km deep · 77 km away
  45. 1.6176 km WSW of Adak, Alaska · 1138 days ago · 24 km deep · 85 km away
  46. 1.9235 km W of Adak, Alaska · 1137 days ago · 22 km deep · 50 km away
  47. 3.3Rat Islands, Aleutian Islands, Alaska · 1136 days ago · 35 km deep · 79 km away
  48. 1.6275 km W of Adak, Alaska · 1136 days ago · 51 km deep · 34 km away
  49. 1.9268 km W of Adak, Alaska · 1135 days ago · 72 km deep · 50 km away
  50. 2.1227 km WSW of Adak, Alaska · 1135 days ago · 13 km deep · 41 km away
  51. 2.0235 km WSW of Adak, Alaska · 1135 days ago · 16 km deep · 38 km away
  52. 1.6232 km WSW of Adak, Alaska · 1135 days ago · 26 km deep · 42 km away
  53. 2.1234 km WSW of Adak, Alaska · 1135 days ago · 7 km deep · 34 km away
  54. 1.8209 km W of Adak, Alaska · 1135 days ago · 67 km deep · 63 km away
  55. 2.0222 km W of Adak, Alaska · 1135 days ago · 97 km deep · 69 km away
  56. 2.7213 km W of Adak, Alaska · 1134 days ago · 98 km deep · 70 km away
  57. 2.3200 km W of Adak, Alaska · 1134 days ago · 75 km deep · 72 km away
  58. 2.4200 km WSW of Adak, Alaska · 1133 days ago · 53 km deep · 61 km away
  59. 2.0284 km W of Adak, Alaska · 1133 days ago · 59 km deep · 45 km away
  60. 1.7238 km W of Adak, Alaska · 1133 days ago · 9 km deep · 55 km away

The first 60 of 166.

Before

  1. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1147 days ago · 14 km deep · 42 km away
  2. 1.8Rat Islands, Aleutian Islands, Alaska · 1148 days ago · 68 km deep · 77 km away
  3. 2.1242 km W of Adak, Alaska · 1148 days ago · 156 km deep · 71 km away
  4. 2.3Rat Islands, Aleutian Islands, Alaska · 1148 days ago · 64 km deep · 76 km away
  5. 3.1291 km W of Adak, Alaska · 1148 days ago · 86 km deep · 69 km away
  6. 2.2212 km WSW of Adak, Alaska · 1149 days ago · 55 km deep · 50 km away
  7. 1.9202 km W of Adak, Alaska · 1149 days ago · 78 km deep · 68 km away
  8. 1.5197 km W of Adak, Alaska · 1149 days ago · 13 km deep · 79 km away
  9. 1.8196 km WSW of Adak, Alaska · 1149 days ago · 39 km deep · 66 km away
  10. 2.1Rat Islands, Aleutian Islands, Alaska · 1149 days ago · 73 km deep · 87 km away
  11. 2.1211 km W of Adak, Alaska · 1149 days ago · 143 km deep · 90 km away
  12. 1.6241 km WSW of Adak, Alaska · 1149 days ago · 13 km deep · 20 km away
  13. 1.6Rat Islands, Aleutian Islands, Alaska · 1150 days ago · 20 km deep · 51 km away
  14. 2.7263 km W of Adak, Alaska · 1150 days ago · 196 km deep · 95 km away
  15. 2.9Rat Islands, Aleutian Islands, Alaska · 1150 days ago · 28 km deep · 54 km away
  16. 1.8Rat Islands, Aleutian Islands, Alaska · 1150 days ago · 51 km deep · 58 km away
  17. 2.8Rat Islands, Aleutian Islands, Alaska · 1150 days ago · 57 km deep · 72 km away
  18. 2.0258 km WSW of Adak, Alaska · 1150 days ago · 5 km deep · 18 km away
  19. 1.8187 km WSW of Adak, Alaska · 1151 days ago · 24 km deep · 75 km away
  20. 2.3244 km WSW of Adak, Alaska · 1151 days ago · 26 km deep · 26 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ks4k (also filed as ak023afgu4ri). Read Mon, Oct 5, 2026, 9:18 AM UTC.