Alaska earthquakes

M3.4 earthquake 123 km SE of Adak, Alaska

A magnitude 3.4 earthquake struck 123 km SE of Adak, Alaska on Sun, Apr 21, 2019, 5:04 PM HADT (02:04 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.1 101 km SW of Atka, 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
3.4 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2019-04-22 02:04:27 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.148° N, 175.289° 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
3.4ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.181 · 4 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 3.1 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.18
Depth from
Operator assigned
Station coverage gap
243°, poorly surrounded by stations
Stations used
8

Nearby

Within 100 km, magnitude 1.5 and up: 87 in the 60 days after this one and 21 in the 30 days before it.

After

  1. 2.3Andreanof Islands, Aleutian Islands, Alaska · 2720 days ago · 23 km deep · 95 km away
  2. 2.457 km SSE of Adak, Alaska · 2719 days ago · 31 km deep · 79 km away
  3. 2.467 km SW of Atka, Alaska · 2717 days ago · 25 km deep · 73 km away
  4. 1.689 km E of Adak, Alaska · 2717 days ago · 51 km deep · 66 km away
  5. 2.9120 km SE of Adak, Alaska · 2717 days ago · 26 km deep · 3 km away
  6. 2.632 km SSE of Adak, Alaska · 2717 days ago · 48 km deep · 92 km away
  7. 2.8177 km SSE of Adak, Alaska · 2716 days ago · 10 km deep · 69 km away
  8. 4.063 km SE of Adak, Alaska · 2712 days ago · 28 km deep · 60 km away
  9. 2.464 km SSE of Adak, Alaska · 2712 days ago · 22 km deep · 65 km away
  10. 2.369 km ESE of Adak, Alaska · 2711 days ago · 51 km deep · 69 km away
  11. 2.253 km SE of Adak, Alaska · 2711 days ago · 57 km deep · 71 km away
  12. 1.754 km SSE of Adak, Alaska · 2710 days ago · 24 km deep · 78 km away
  13. 1.742 km SSE of Adak, Alaska · 2710 days ago · 31 km deep · 87 km away
  14. 2.3146 km S of Atka, Alaska · 2710 days ago · 32 km deep · 89 km away
  15. 1.634 km SSE of Adak, Alaska · 2710 days ago · 43 km deep · 93 km away
  16. 1.879 km WSW of Atka, Alaska · 2710 days ago · 114 km deep · 98 km away
  17. 1.959 km SE of Adak, Alaska · 2707 days ago · 23 km deep · 66 km away
  18. 2.375 km ESE of Adak, Alaska · 2707 days ago · 53 km deep · 67 km away
  19. 2.277 km E of Adak, Alaska · 2707 days ago · 68 km deep · 77 km away
  20. 1.926 km SE of Adak, Alaska · 2707 days ago · 47 km deep · 97 km away
  21. 2.143 km SSE of Adak, Alaska · 2706 days ago · 44 km deep · 92 km away
  22. 2.194 km SW of Atka, Alaska · 2706 days ago · 12 km deep · 48 km away
  23. 3.466 km SSE of Adak, Alaska · 2704 days ago · 29 km deep · 63 km away
  24. 1.951 km SSE of Adak, Alaska · 2703 days ago · 42 km deep · 79 km away
  25. 2.148 km SE of Adak, Alaska · 2703 days ago · 25 km deep · 76 km away
  26. 2.663 km SE of Adak, Alaska · 2702 days ago · 33 km deep · 64 km away
  27. 2.248 km E of Adak, Alaska · 2702 days ago · 73 km deep · 87 km away
  28. 4.1101 km SW of Atka, Alaska · 2702 days ago · 35 km deep · 44 km away
  29. 3.894 km SW of Atka, Alaska · 2702 days ago · 35 km deep · 59 km away
  30. 2.8100 km SW of Atka, Alaska · 2702 days ago · 35 km deep · 46 km away
  31. 1.855 km SSE of Adak, Alaska · 2701 days ago · 22 km deep · 74 km away
  32. 1.884 km SW of Atka, Alaska · 2700 days ago · 26 km deep · 61 km away
  33. 2.086 km SW of Atka, Alaska · 2699 days ago · 35 km deep · 55 km away
  34. 1.679 km SSE of Adak, Alaska · 2699 days ago · 19 km deep · 74 km away
  35. 3.899 km SW of Atka, Alaska · 2697 days ago · 21 km deep · 42 km away
  36. 2.388 km SSE of Adak, Alaska · 2696 days ago · 14 km deep · 65 km away
  37. 3.689 km SE of Adak, Alaska · 2695 days ago · 35 km deep · 37 km away
  38. 2.196 km SE of Adak, Alaska · 2695 days ago · 5 km deep · 37 km away
  39. 2.581 km SSE of Adak, Alaska · 2694 days ago · 22 km deep · 50 km away
  40. 2.5116 km SE of Adak, Alaska · 2694 days ago · 13 km deep · 27 km away
  41. 1.7110 km SSE of Adak, Alaska · 2694 days ago · 11 km deep · 39 km away
  42. 2.379 km SE of Adak, Alaska · 2694 days ago · 0 km deep · 49 km away
  43. 1.957 km SE of Adak, Alaska · 2692 days ago · 18 km deep · 69 km away
  44. 2.044 km E of Adak, Alaska · 2691 days ago · 78 km deep · 93 km away
  45. 2.363 km SE of Adak, Alaska · 2689 days ago · 28 km deep · 62 km away
  46. 3.894 km SSW of Atka, Alaska · 2689 days ago · 10 km deep · 48 km away
  47. 2.685 km S of Adak, Alaska · 2688 days ago · 24 km deep · 86 km away
  48. 3.994 km S of Adak, Alaska · 2688 days ago · 35 km deep · 84 km away
  49. 2.684 km S of Adak, Alaska · 2688 days ago · 20 km deep · 92 km away
  50. 2.054 km SE of Adak, Alaska · 2688 days ago · 50 km deep · 69 km away
  51. 2.029 km SE of Adak, Alaska · 2688 days ago · 43 km deep · 94 km away
  52. 2.189 km S of Adak, Alaska · 2688 days ago · 21 km deep · 84 km away
  53. 2.189 km ESE of Adak, Alaska · 2682 days ago · 25 km deep · 45 km away
  54. 2.077 km E of Adak, Alaska · 2682 days ago · 29 km deep · 82 km away
  55. 2.181 km SSE of Adak, Alaska · 2682 days ago · 13 km deep · 67 km away
  56. 2.864 km SE of Adak, Alaska · 2680 days ago · 31 km deep · 63 km away
  57. 2.449 km SE of Adak, Alaska · 2680 days ago · 42 km deep · 76 km away
  58. 3.280 km S of Atka, Alaska · 2675 days ago · 35 km deep · 82 km away
  59. 1.687 km ESE of Adak, Alaska · 2675 days ago · 26 km deep · 52 km away
  60. 1.857 km SE of Adak, Alaska · 2675 days ago · 54 km deep · 66 km away

The first 60 of 87.

Before

  1. 2.940 km SSE of Adak, Alaska · 2720 days ago · 45 km deep · 87 km away
  2. 2.255 km SSE of Adak, Alaska · 2721 days ago · 16 km deep · 74 km away
  3. 2.028 km ESE of Adak, Alaska · 2721 days ago · 85 km deep · 95 km away
  4. 1.961 km E of Adak, Alaska · 2724 days ago · 62 km deep · 78 km away
  5. 1.974 km ESE of Adak, Alaska · 2724 days ago · 35 km deep · 57 km away
  6. 2.028 km SE of Adak, Alaska · 2729 days ago · 73 km deep · 96 km away
  7. 3.992 km SW of Atka, Alaska · 2731 days ago · 35 km deep · 55 km away
  8. 2.849 km SSE of Adak, Alaska · 2733 days ago · 35 km deep · 77 km away
  9. 2.544 km SW of Atka, Alaska · 2733 days ago · 70 km deep · 95 km away
  10. 2.793 km SSE of Adak, Alaska · 2735 days ago · 26 km deep · 73 km away
  11. 2.062 km SE of Adak, Alaska · 2736 days ago · 55 km deep · 62 km away
  12. 2.975 km E of Adak, Alaska · 2738 days ago · 71 km deep · 86 km away
  13. 2.370 km SSE of Adak, Alaska · 2738 days ago · 19 km deep · 76 km away
  14. 2.050 km SSE of Adak, Alaska · 2738 days ago · 39 km deep · 89 km away
  15. 2.497 km SW of Atka, Alaska · 2739 days ago · 37 km deep · 53 km away
  16. 2.350 km ESE of Adak, Alaska · 2739 days ago · 54 km deep · 74 km away
  17. 2.444 km E of Adak, Alaska · 2739 days ago · 72 km deep · 93 km away
  18. 4.747 km SE of Adak, Alaska · 2744 days ago · 49 km deep · 76 km away
  19. 1.977 km SW of Atka, Alaska · 2745 days ago · 20 km deep · 64 km away
  20. 2.268 km SE of Adak, Alaska · 2748 days ago · 31 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70003fld (also filed as ak019559entv). Read Thu, Oct 1, 2026, 8:09 PM UTC.