Alaska earthquakes

M3.4 earthquake 70 km SSE of Adak, Alaska

A magnitude 3.4 earthquake struck 70 km SSE of Adak, Alaska on Tue, Aug 1, 2023, 12:09 AM HADT (09:09 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.0 44 km SSE of Adak, Alaska. This one was a foreshock.

More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
3.4 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-08-01 09:09:43 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.258° N, 176.374° 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
3.4mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.219 · 5 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 5.2 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.22
Depth from
Operator assigned
Station coverage gap
218°, poorly surrounded by stations
Stations used
17

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 132 in the 30 days before it.

After

  1. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1158 days ago · 35 km deep · 11 km away
  2. 2.236 km NE of Adak, Alaska · 1158 days ago · 119 km deep · 96 km away
  3. 1.768 km SSE of Adak, Alaska · 1158 days ago · 19 km deep · 3 km away
  4. 2.980 km SSE of Adak, Alaska · 1158 days ago · 35 km deep · 11 km away
  5. 1.996 km SW of Adak, Alaska · 1158 days ago · 32 km deep · 95 km away
  6. 3.183 km SSE of Adak, Alaska · 1158 days ago · 35 km deep · 13 km away
  7. 1.887 km SW of Adak, Alaska · 1158 days ago · 51 km deep · 82 km away
  8. 2.084 km WSW of Adak, Alaska · 1158 days ago · 29 km deep · 93 km away
  9. 3.285 km SSE of Adak, Alaska · 1158 days ago · 10 km deep · 15 km away
  10. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1157 days ago · 54 km deep · 95 km away
  11. 1.869 km SE of Adak, Alaska · 1156 days ago · 22 km deep · 26 km away
  12. 2.187 km SW of Atka, Alaska · 1156 days ago · 26 km deep · 99 km away
  13. 1.960 km S of Adak, Alaska · 1156 days ago · 22 km deep · 20 km away
  14. 2.566 km SE of Adak, Alaska · 1155 days ago · 35 km deep · 48 km away
  15. 1.859 km SE of Adak, Alaska · 1154 days ago · 22 km deep · 37 km away
  16. 1.738 km SSE of Adak, Alaska · 1154 days ago · 34 km deep · 34 km away
  17. 2.763 km SW of Adak, Alaska · 1154 days ago · 33 km deep · 71 km away
  18. 2.9137 km SE of Adak, Alaska · 1154 days ago · 10 km deep · 77 km away
  19. 3.2150 km SSW of Adak, Alaska · 1154 days ago · 10 km deep · 95 km away
  20. 2.6150 km SSE of Adak, Alaska · 1153 days ago · 10 km deep · 85 km away
  21. 3.182 km SW of Adak, Alaska · 1153 days ago · 65 km deep · 91 km away
  22. 1.634 km SSE of Adak, Alaska · 1153 days ago · 41 km deep · 37 km away
  23. 1.851 km SSE of Adak, Alaska · 1152 days ago · 26 km deep · 24 km away
  24. 1.661 km ESE of Adak, Alaska · 1152 days ago · 35 km deep · 50 km away
  25. 3.071 km WSW of Adak, Alaska · 1152 days ago · 33 km deep · 87 km away
  26. 2.057 km SE of Adak, Alaska · 1152 days ago · 23 km deep · 34 km away
  27. 1.652 km WSW of Adak, Alaska · 1152 days ago · 67 km deep · 82 km away
  28. 2.454 km E of Adak, Alaska · 1152 days ago · 75 km deep · 72 km away
  29. 1.959 km SSW of Adak, Alaska · 1151 days ago · 45 km deep · 52 km away
  30. 3.0124 km SSW of Atka, Alaska · 1151 days ago · 10 km deep · 87 km away
  31. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1150 days ago · 33 km deep · 34 km away
  32. 3.3Andreanof Islands, Aleutian Islands, Alaska · 1150 days ago · 39 km deep · 84 km away
  33. 1.738 km E of Adak, Alaska · 1149 days ago · 82 km deep · 68 km away
  34. 1.664 km SSW of Adak, Alaska · 1149 days ago · 37 km deep · 48 km away
  35. 3.560 km S of Adak, Alaska · 1149 days ago · 35 km deep · 31 km away
  36. 1.560 km SSE of Adak, Alaska · 1149 days ago · 23 km deep · 21 km away
  37. 1.552 km S of Adak, Alaska · 1149 days ago · 24 km deep · 19 km away
  38. 2.6106 km SE of Adak, Alaska · 1149 days ago · 35 km deep · 57 km away
  39. 2.812 km S of Adak, Alaska · 1149 days ago · 13 km deep · 59 km away
  40. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1148 days ago · 23 km deep · 45 km away
  41. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1148 days ago · 72 km deep · 69 km away
  42. 1.761 km SE of Adak, Alaska · 1148 days ago · 26 km deep · 24 km away
  43. 1.5110 km SW of Atka, Alaska · 1148 days ago · 13 km deep · 88 km away
  44. 1.568 km SSE of Adak, Alaska · 1147 days ago · 20 km deep · 7 km away
  45. 2.755 km SW of Adak, Alaska · 1147 days ago · 35 km deep · 68 km away
  46. 1.659 km SE of Adak, Alaska · 1147 days ago · 26 km deep · 39 km away
  47. 1.647 km SSW of Adak, Alaska · 1147 days ago · 37 km deep · 41 km away
  48. 2.768 km ENE of Adak, Alaska · 1147 days ago · 216 km deep · 99 km away
  49. 1.544 km SSW of Adak, Alaska · 1147 days ago · 40 km deep · 39 km away
  50. 1.566 km SSE of Adak, Alaska · 1147 days ago · 22 km deep · 5 km away
  51. 1.563 km SSW of Adak, Alaska · 1147 days ago · 43 km deep · 47 km away
  52. 1.579 km SW of Adak, Alaska · 1147 days ago · 28 km deep · 83 km away
  53. 1.673 km SSW of Adak, Alaska · 1146 days ago · 26 km deep · 52 km away
  54. 1.614 km E of Adak, Alaska · 1146 days ago · 113 km deep · 69 km away
  55. 3.488 km ESE of Adak, Alaska · 1146 days ago · 35 km deep · 74 km away
  56. 1.591 km SW of Atka, Alaska · 1145 days ago · 32 km deep · 96 km away
  57. 1.559 km SE of Adak, Alaska · 1145 days ago · 25 km deep · 38 km away
  58. 1.588 km SW of Adak, Alaska · 1145 days ago · 30 km deep · 90 km away
  59. 1.663 km WSW of Adak, Alaska · 1145 days ago · 73 km deep · 93 km away
  60. 2.646 km SSE of Adak, Alaska · 1144 days ago · 37 km deep · 25 km away

The first 60 of at least 199.

Before

  1. 3.375 km SSE of Adak, Alaska · 1158 days ago · 35 km deep · 4 km away
  2. 1.873 km SSW of Adak, Alaska · 1159 days ago · 31 km deep · 53 km away
  3. 3.176 km SSE of Adak, Alaska · 1159 days ago · 20 km deep · 5 km away
  4. 1.873 km SSW of Adak, Alaska · 1159 days ago · 27 km deep · 54 km away
  5. 3.975 km SSW of Adak, Alaska · 1159 days ago · 35 km deep · 55 km away
  6. 1.558 km WSW of Adak, Alaska · 1160 days ago · 68 km deep · 93 km away
  7. 1.660 km SE of Adak, Alaska · 1160 days ago · 26 km deep · 40 km away
  8. 1.689 km WSW of Adak, Alaska · 1160 days ago · 25 km deep · 96 km away
  9. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1160 days ago · 116 km deep · 98 km away
  10. 1.581 km WSW of Adak, Alaska · 1160 days ago · 40 km deep · 91 km away
  11. 1.653 km S of Adak, Alaska · 1160 days ago · 26 km deep · 23 km away
  12. 1.971 km ESE of Adak, Alaska · 1160 days ago · 32 km deep · 61 km away
  13. 3.758 km SSW of Adak, Alaska · 1161 days ago · 35 km deep · 37 km away
  14. 1.721 km S of Adak, Alaska · 1161 days ago · 60 km deep · 50 km away
  15. 1.664 km SSW of Adak, Alaska · 1161 days ago · 36 km deep · 52 km away
  16. 1.540 km SW of Adak, Alaska · 1161 days ago · 59 km deep · 55 km away
  17. 1.780 km WSW of Adak, Alaska · 1162 days ago · 36 km deep · 89 km away
  18. 1.558 km SSE of Adak, Alaska · 1162 days ago · 23 km deep · 24 km away
  19. 1.759 km SSE of Adak, Alaska · 1162 days ago · 13 km deep · 12 km away
  20. 1.6101 km SSW of Adak, Alaska · 1162 days ago · 25 km deep · 71 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kzv9 (also filed as ak0239sevuad). Read Fri, Oct 2, 2026, 5:05 PM UTC.