Alaska earthquakes

M3.9 earthquake 98 km SSE of Adak, Alaska

A magnitude 3.9 earthquake struck 98 km SSE of Adak, Alaska on Wed, Aug 29, 2018, 6:23 AM HADT (15:23 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.0 113 km SSE of Adak, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
3.9 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-08-29 15:23:45 UTC
Depth
33.3 km (20.7 mi), shallow
Epicenter
51.035° N, 176.160° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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 9.8 km horizontally, 11.7 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
225°, poorly surrounded by stations
Stations used
39

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 64 in the 30 days before it.

After

  1. 2.683 km SSE of Adak, Alaska · 2955 days ago · 26 km deep · 18 km away
  2. 2.987 km SSE of Adak, Alaska · 2955 days ago · 7 km deep · 11 km away
  3. 3.6107 km SSE of Adak, Alaska · 2955 days ago · 30 km deep · 10 km away
  4. 3.8105 km SSE of Adak, Alaska · 2955 days ago · 28 km deep · 9 km away
  5. 4.0113 km SSE of Adak, Alaska · 2955 days ago · 27 km deep · 16 km away
  6. 3.9109 km SSE of Adak, Alaska · 2955 days ago · 35 km deep · 10 km away
  7. 2.499 km SSE of Adak, Alaska · 2955 days ago · 26 km deep · 1 km away
  8. 2.885 km SSE of Adak, Alaska · 2955 days ago · 10 km deep · 16 km away
  9. 2.594 km SSE of Adak, Alaska · 2955 days ago · 18 km deep · 6 km away
  10. 2.695 km SSE of Adak, Alaska · 2955 days ago · 12 km deep · 4 km away
  11. 3.335 km SE of Adak, Alaska · 2955 days ago · 38 km deep · 66 km away
  12. 3.3110 km SSE of Adak, Alaska · 2955 days ago · 32 km deep · 14 km away
  13. 2.7101 km SSE of Adak, Alaska · 2954 days ago · 33 km deep · 6 km away
  14. 3.2102 km SSE of Adak, Alaska · 2954 days ago · 14 km deep · 6 km away
  15. 2.786 km SSE of Adak, Alaska · 2954 days ago · 8 km deep · 18 km away
  16. 2.6106 km SSE of Adak, Alaska · 2954 days ago · 30 km deep · 10 km away
  17. 2.798 km SSE of Adak, Alaska · 2954 days ago · 19 km deep · 7 km away
  18. 1.654 km SE of Adak, Alaska · 2953 days ago · 42 km deep · 55 km away
  19. 2.188 km SSE of Adak, Alaska · 2953 days ago · 3 km deep · 10 km away
  20. 1.653 km SE of Adak, Alaska · 2953 days ago · 47 km deep · 50 km away
  21. 2.6106 km SSE of Adak, Alaska · 2953 days ago · 35 km deep · 11 km away
  22. 4.096 km SSE of Adak, Alaska · 2953 days ago · 10 km deep · 4 km away
  23. 1.765 km SSW of Adak, Alaska · 2953 days ago · 36 km deep · 79 km away
  24. 1.970 km SSW of Adak, Alaska · 2952 days ago · 40 km deep · 75 km away
  25. 1.925 km SSW of Adak, Alaska · 2952 days ago · 34 km deep · 85 km away
  26. 2.489 km SSE of Adak, Alaska · 2952 days ago · 34 km deep · 10 km away
  27. 2.8122 km SSW of Adak, Alaska · 2952 days ago · 30 km deep · 92 km away
  28. 2.4129 km SSW of Adak, Alaska · 2951 days ago · 39 km deep · 96 km away
  29. 1.827 km SE of Adak, Alaska · 2951 days ago · 55 km deep · 76 km away
  30. 2.051 km SSE of Adak, Alaska · 2950 days ago · 49 km deep · 49 km away
  31. 3.360 km SSE of Adak, Alaska · 2950 days ago · 35 km deep · 38 km away
  32. 2.970 km E of Adak, Alaska · 2949 days ago · 33 km deep · 91 km away
  33. 2.039 km S of Adak, Alaska · 2949 days ago · 34 km deep · 62 km away
  34. 1.886 km SW of Adak, Alaska · 2949 days ago · 39 km deep · 94 km away
  35. 1.8Andreanof Islands, Aleutian Islands, Alaska · 2948 days ago · 37 km deep · 61 km away
  36. 2.264 km SE of Adak, Alaska · 2948 days ago · 24 km deep · 53 km away
  37. 1.850 km S of Adak, Alaska · 2947 days ago · 37 km deep · 49 km away
  38. 1.652 km S of Adak, Alaska · 2947 days ago · 43 km deep · 48 km away
  39. 1.521 km SSW of Adak, Alaska · 2946 days ago · 49 km deep · 85 km away
  40. 1.678 km E of Adak, Alaska · 2945 days ago · 66 km deep · 95 km away
  41. 2.858 km ESE of Adak, Alaska · 2945 days ago · 47 km deep · 80 km away
  42. 1.711 km SSW of Adak, Alaska · 2945 days ago · 76 km deep · 92 km away
  43. 2.557 km SSE of Adak, Alaska · 2945 days ago · 26 km deep · 45 km away
  44. 1.656 km SE of Adak, Alaska · 2945 days ago · 27 km deep · 56 km away
  45. 1.847 km SE of Adak, Alaska · 2945 days ago · 25 km deep · 55 km away
  46. 3.0120 km SSW of Adak, Alaska · 2944 days ago · 54 km deep · 89 km away
  47. 3.150 km SE of Adak, Alaska · 2944 days ago · 51 km deep · 63 km away
  48. 2.695 km SSE of Adak, Alaska · 2944 days ago · 16 km deep · 5 km away
  49. 2.4144 km SSE of Adak, Alaska · 2944 days ago · 14 km deep · 47 km away
  50. 1.553 km SE of Adak, Alaska · 2943 days ago · 9 km deep · 54 km away
  51. 1.953 km SSE of Adak, Alaska · 2943 days ago · 19 km deep · 47 km away
  52. 1.838 km SE of Adak, Alaska · 2943 days ago · 65 km deep · 72 km away
  53. 1.654 km SSE of Adak, Alaska · 2943 days ago · 13 km deep · 46 km away
  54. 1.565 km SSE of Adak, Alaska · 2942 days ago · 22 km deep · 34 km away
  55. 1.553 km SW of Adak, Alaska · 2942 days ago · 36 km deep · 84 km away
  56. 2.3149 km S of Adak, Alaska · 2941 days ago · 5 km deep · 63 km away
  57. 1.991 km S of Adak, Alaska · 2941 days ago · 14 km deep · 17 km away
  58. 1.9Andreanof Islands, Aleutian Islands, Alaska · 2938 days ago · 57 km deep · 80 km away
  59. 2.793 km S of Adak, Alaska · 2938 days ago · 15 km deep · 36 km away
  60. 2.0122 km SSW of Atka, Alaska · 2937 days ago · 15 km deep · 77 km away

The first 60 of 135.

Before

  1. 2.889 km SSE of Adak, Alaska · 2955 days ago · 3 km deep · 11 km away
  2. 4.1173 km SSE of Adak, Alaska · 2955 days ago · 10 km deep · 78 km away
  3. 3.298 km SSE of Adak, Alaska · 2955 days ago · 23 km deep · 3 km away
  4. 4.791 km SSE of Adak, Alaska · 2955 days ago · 38 km deep · 8 km away
  5. 2.8189 km SSE of Adak, Alaska · 2956 days ago · 10 km deep · 91 km away
  6. 1.645 km WSW of Adak, Alaska · 2957 days ago · 61 km deep · 100 km away
  7. 2.3109 km SSE of Adak, Alaska · 2957 days ago · 33 km deep · 10 km away
  8. 2.5102 km SSE of Adak, Alaska · 2958 days ago · 34 km deep · 3 km away
  9. 4.0108 km SSE of Adak, Alaska · 2958 days ago · 29 km deep · 10 km away
  10. 1.852 km SE of Adak, Alaska · 2959 days ago · 46 km deep · 62 km away
  11. 2.073 km ESE of Adak, Alaska · 2959 days ago · 47 km deep · 63 km away
  12. 2.146 km SW of Adak, Alaska · 2959 days ago · 38 km deep · 88 km away
  13. 2.458 km SE of Adak, Alaska · 2959 days ago · 24 km deep · 46 km away
  14. 1.887 km SW of Adak, Alaska · 2960 days ago · 42 km deep · 98 km away
  15. 1.863 km SSW of Adak, Alaska · 2960 days ago · 49 km deep · 75 km away
  16. 1.990 km SW of Adak, Alaska · 2961 days ago · 32 km deep · 98 km away
  17. 2.1Andreanof Islands, Aleutian Islands, Alaska · 2962 days ago · 25 km deep · 96 km away
  18. 2.192 km SW of Adak, Alaska · 2962 days ago · 32 km deep · 98 km away
  19. 2.991 km SW of Adak, Alaska · 2962 days ago · 31 km deep · 96 km away
  20. 3.1102 km SW of Adak, Alaska · 2962 days ago · 17 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000h9iy. Read Thu, Oct 1, 2026, 11:05 PM UTC.