Alaska earthquakes

M3.1 earthquake 77 km WSW of Adak, Alaska

A magnitude 3.1 earthquake struck 77 km WSW of Adak, Alaska on Sun, May 28, 2023, 11:31 PM HADT (08:31 UTC), 71 km (44 mi) below the surface.

A larger quake followed: M5.3 135 km WSW 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
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-05-29 08:31:54 UTC
Depth
70.9 km (44.0 mi), intermediate-depth
Epicenter
51.540° N, 177.623° W
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
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 18 stations
2.6ML, 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 13.1 km horizontally, 16.0 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
203°, poorly surrounded by stations
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 136 in the 30 days before it.

After

  1. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1222 days ago · 32 km deep · 86 km away
  2. 1.641 km S of Adak, Alaska · 1221 days ago · 35 km deep · 73 km away
  3. 3.2151 km W of Adak, Alaska · 1221 days ago · 93 km deep · 86 km away
  4. 1.541 km SSE of Adak, Alaska · 1221 days ago · 30 km deep · 86 km away
  5. 1.659 km SSW of Adak, Alaska · 1220 days ago · 25 km deep · 41 km away
  6. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1220 days ago · 8 km deep · 41 km away
  7. 1.542 km SSE of Adak, Alaska · 1220 days ago · 29 km deep · 86 km away
  8. 1.6125 km WSW of Adak, Alaska · 1220 days ago · 24 km deep · 48 km away
  9. 2.598 km WSW of Adak, Alaska · 1220 days ago · 81 km deep · 25 km away
  10. 1.8161 km WSW of Adak, Alaska · 1220 days ago · 13 km deep · 89 km away
  11. 2.427 km N of Adak, Alaska · 1220 days ago · 205 km deep · 94 km away
  12. 2.0129 km SW of Adak, Alaska · 1220 days ago · 28 km deep · 53 km away
  13. 2.772 km SSW of Adak, Alaska · 1219 days ago · 35 km deep · 53 km away
  14. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1219 days ago · 72 km deep · 41 km away
  15. 4.5143 km WSW of Adak, Alaska · 1219 days ago · 35 km deep · 66 km away
  16. 3.174 km SSW of Adak, Alaska · 1219 days ago · 40 km deep · 47 km away
  17. 1.677 km W of Adak, Alaska · 1219 days ago · 1 km deep · 36 km away
  18. 1.678 km W of Adak, Alaska · 1219 days ago · 1 km deep · 36 km away
  19. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1219 days ago · 101 km deep · 87 km away
  20. 2.0107 km SW of Adak, Alaska · 1218 days ago · 20 km deep · 34 km away
  21. 1.9102 km WSW of Adak, Alaska · 1218 days ago · 24 km deep · 25 km away
  22. 2.966 km SW of Adak, Alaska · 1218 days ago · 34 km deep · 16 km away
  23. 3.862 km SSW of Adak, Alaska · 1218 days ago · 35 km deep · 41 km away
  24. 3.3130 km WSW of Adak, Alaska · 1218 days ago · 35 km deep · 53 km away
  25. 1.812 km WSW of Adak, Alaska · 1218 days ago · 71 km deep · 65 km away
  26. 4.164 km SSW of Adak, Alaska · 1217 days ago · 10 km deep · 49 km away
  27. 3.228 km S of Adak, Alaska · 1217 days ago · 75 km deep · 72 km away
  28. 2.590 km WSW of Adak, Alaska · 1217 days ago · 63 km deep · 14 km away
  29. 3.5Andreanof Islands, Aleutian Islands, Alaska · 1216 days ago · 96 km deep · 39 km away
  30. 3.833 km SSW of Adak, Alaska · 1216 days ago · 30 km deep · 59 km away
  31. 1.839 km S of Adak, Alaska · 1215 days ago · 29 km deep · 72 km away
  32. 1.934 km WSW of Adak, Alaska · 1215 days ago · 8 km deep · 44 km away
  33. 2.2152 km WSW of Adak, Alaska · 1214 days ago · 65 km deep · 79 km away
  34. 2.2123 km WSW of Adak, Alaska · 1214 days ago · 13 km deep · 46 km away
  35. 1.9134 km WSW of Adak, Alaska · 1214 days ago · 23 km deep · 57 km away
  36. 1.871 km SW of Adak, Alaska · 1214 days ago · 44 km deep · 11 km away
  37. 2.071 km SSW of Adak, Alaska · 1214 days ago · 23 km deep · 48 km away
  38. 2.097 km WSW of Adak, Alaska · 1213 days ago · 57 km deep · 19 km away
  39. 3.240 km SW of Adak, Alaska · 1213 days ago · 32 km deep · 39 km away
  40. 2.2122 km WSW of Adak, Alaska · 1213 days ago · 31 km deep · 44 km away
  41. 3.8131 km W of Adak, Alaska · 1212 days ago · 133 km deep · 76 km away
  42. 1.545 km SSW of Adak, Alaska · 1212 days ago · 22 km deep · 50 km away
  43. 2.093 km SW of Adak, Alaska · 1212 days ago · 23 km deep · 26 km away
  44. 1.7110 km WSW of Adak, Alaska · 1212 days ago · 10 km deep · 34 km away
  45. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1212 days ago · 41 km deep · 86 km away
  46. 1.789 km SW of Adak, Alaska · 1212 days ago · 30 km deep · 18 km away
  47. 1.551 km S of Adak, Alaska · 1212 days ago · 26 km deep · 79 km away
  48. 2.5126 km WSW of Adak, Alaska · 1212 days ago · 20 km deep · 53 km away
  49. 1.682 km WSW of Adak, Alaska · 1212 days ago · 34 km deep · 7 km away
  50. 1.541 km SSE of Adak, Alaska · 1211 days ago · 33 km deep · 88 km away
  51. 1.852 km S of Adak, Alaska · 1211 days ago · 26 km deep · 77 km away
  52. 1.8100 km WSW of Adak, Alaska · 1211 days ago · 44 km deep · 23 km away
  53. 1.8147 km WSW of Adak, Alaska · 1211 days ago · 11 km deep · 72 km away
  54. 2.845 km SW of Adak, Alaska · 1211 days ago · 33 km deep · 39 km away
  55. 1.8119 km SSW of Adak, Alaska · 1211 days ago · 26 km deep · 85 km away
  56. 2.6163 km WSW of Adak, Alaska · 1211 days ago · 25 km deep · 90 km away
  57. 1.7114 km WSW of Adak, Alaska · 1210 days ago · 36 km deep · 37 km away
  58. 1.7112 km WSW of Adak, Alaska · 1210 days ago · 24 km deep · 34 km away
  59. 1.7131 km WSW of Adak, Alaska · 1210 days ago · 24 km deep · 54 km away
  60. 1.9118 km SW of Adak, Alaska · 1210 days ago · 16 km deep · 47 km away

The first 60 of at least 199.

Before

  1. 1.758 km SW of Adak, Alaska · 1222 days ago · 40 km deep · 28 km away
  2. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1223 days ago · 61 km deep · 54 km away
  3. 2.2126 km WSW of Adak, Alaska · 1223 days ago · 33 km deep · 48 km away
  4. 3.555 km SW of Adak, Alaska · 1224 days ago · 35 km deep · 38 km away
  5. 1.943 km SW of Adak, Alaska · 1224 days ago · 40 km deep · 43 km away
  6. 1.944 km SSE of Adak, Alaska · 1224 days ago · 36 km deep · 83 km away
  7. 1.762 km S of Adak, Alaska · 1225 days ago · 22 km deep · 81 km away
  8. 1.989 km WSW of Adak, Alaska · 1225 days ago · 56 km deep · 13 km away
  9. 1.785 km WSW of Adak, Alaska · 1225 days ago · 13 km deep · 8 km away
  10. 1.736 km SSW of Adak, Alaska · 1225 days ago · 62 km deep · 56 km away
  11. 2.087 km SW of Adak, Alaska · 1225 days ago · 29 km deep · 16 km away
  12. 3.542 km S of Adak, Alaska · 1226 days ago · 35 km deep · 66 km away
  13. 1.750 km SSE of Adak, Alaska · 1226 days ago · 34 km deep · 87 km away
  14. 2.6150 km WSW of Adak, Alaska · 1226 days ago · 26 km deep · 74 km away
  15. 1.853 km SW of Adak, Alaska · 1226 days ago · 35 km deep · 38 km away
  16. 2.5143 km WSW of Adak, Alaska · 1226 days ago · 35 km deep · 66 km away
  17. 2.7174 km WSW of Adak, Alaska · 1227 days ago · 29 km deep · 99 km away
  18. 1.740 km SSE of Adak, Alaska · 1227 days ago · 46 km deep · 86 km away
  19. 1.581 km SW of Adak, Alaska · 1227 days ago · 15 km deep · 20 km away
  20. 1.678 km SW of Adak, Alaska · 1228 days ago · 28 km deep · 15 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000k5ln (also filed as ak0236uk0y4m). Read Fri, Oct 2, 2026, 8:17 AM UTC.