Alaska earthquakes

M3.3 earthquake 88 km SE of Adak, Alaska

A magnitude 3.3 earthquake struck 88 km SE of Adak, Alaska on Wed, Apr 15, 2020, 10:49 AM HADT (19:49 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.5 146 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
3.3 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-04-15 19:49:06 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.324° N, 175.711° 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
3.3ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 stations
2.9ML, 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 4.2 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
230°, poorly surrounded by stations
Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 198 in the 60 days after this one and 50 in the 30 days before it.

After

  1. 3.7106 km SSW of Atka, Alaska · 2363 days ago · 35 km deep · 49 km away
  2. 3.4123 km SSW of Atka, Alaska · 2363 days ago · 15 km deep · 57 km away
  3. 2.945 km ENE of Adak, Alaska · 2363 days ago · 148 km deep · 78 km away
  4. 2.7130 km SSW of Atka, Alaska · 2363 days ago · 18 km deep · 58 km away
  5. 2.9129 km SSW of Atka, Alaska · 2363 days ago · 10 km deep · 60 km away
  6. 2.7131 km SSW of Atka, Alaska · 2363 days ago · 24 km deep · 64 km away
  7. 2.063 km SSE of Adak, Alaska · 2363 days ago · 26 km deep · 49 km away
  8. 1.655 km SSE of Adak, Alaska · 2362 days ago · 23 km deep · 44 km away
  9. 2.538 km SW of Adak, Alaska · 2362 days ago · 69 km deep · 98 km away
  10. 2.896 km SSE of Adak, Alaska · 2362 days ago · 10 km deep · 51 km away
  11. 2.789 km SW of Atka, Alaska · 2361 days ago · 28 km deep · 53 km away
  12. 2.563 km SE of Adak, Alaska · 2361 days ago · 35 km deep · 25 km away
  13. 1.564 km SSW of Adak, Alaska · 2361 days ago · 34 km deep · 92 km away
  14. 1.9144 km S of Adak, Alaska · 2361 days ago · 23 km deep · 89 km away
  15. 1.784 km S of Adak, Alaska · 2360 days ago · 26 km deep · 77 km away
  16. 1.568 km SE of Adak, Alaska · 2360 days ago · 26 km deep · 20 km away
  17. 2.870 km ENE of Adak, Alaska · 2360 days ago · 113 km deep · 93 km away
  18. 1.532 km SSE of Adak, Alaska · 2360 days ago · 49 km deep · 58 km away
  19. 3.0121 km SSW of Atka, Alaska · 2359 days ago · 12 km deep · 56 km away
  20. 1.695 km SE of Adak, Alaska · 2359 days ago · 25 km deep · 15 km away
  21. 2.966 km SW of Atka, Alaska · 2359 days ago · 72 km deep · 77 km away
  22. 1.765 km SE of Adak, Alaska · 2359 days ago · 13 km deep · 26 km away
  23. 3.3105 km SE of Adak, Alaska · 2358 days ago · 28 km deep · 23 km away
  24. 2.6107 km SE of Adak, Alaska · 2358 days ago · 35 km deep · 24 km away
  25. 3.457 km SE of Adak, Alaska · 2358 days ago · 35 km deep · 33 km away
  26. 1.662 km SE of Adak, Alaska · 2358 days ago · 13 km deep · 30 km away
  27. 2.857 km SW of Atka, Alaska · 2358 days ago · 35 km deep · 85 km away
  28. 2.272 km SE of Adak, Alaska · 2357 days ago · 27 km deep · 17 km away
  29. 3.836 km SSW of Adak, Alaska · 2356 days ago · 69 km deep · 78 km away
  30. 1.763 km SE of Adak, Alaska · 2356 days ago · 24 km deep · 25 km away
  31. 1.673 km SSE of Adak, Alaska · 2356 days ago · 13 km deep · 36 km away
  32. 1.549 km SW of Adak, Alaska · 2356 days ago · 44 km deep · 99 km away
  33. 3.062 km SE of Adak, Alaska · 2355 days ago · 35 km deep · 26 km away
  34. 2.324 km ESE of Adak, Alaska · 2355 days ago · 71 km deep · 65 km away
  35. 1.8114 km SW of Atka, Alaska · 2354 days ago · 31 km deep · 39 km away
  36. 1.565 km SSW of Adak, Alaska · 2354 days ago · 26 km deep · 89 km away
  37. 2.769 km SW of Atka, Alaska · 2354 days ago · 56 km deep · 73 km away
  38. 1.866 km SW of Atka, Alaska · 2354 days ago · 47 km deep · 77 km away
  39. 2.13 km N of Adak, Alaska · 2353 days ago · 118 km deep · 90 km away
  40. 1.797 km SE of Adak, Alaska · 2353 days ago · 19 km deep · 16 km away
  41. 1.823 km SE of Adak, Alaska · 2353 days ago · 64 km deep · 65 km away
  42. 1.848 km SSW of Adak, Alaska · 2352 days ago · 43 km deep · 79 km away
  43. 2.851 km SSE of Adak, Alaska · 2352 days ago · 41 km deep · 49 km away
  44. 2.736 km SSW of Adak, Alaska · 2351 days ago · 71 km deep · 78 km away
  45. 2.098 km ESE of Adak, Alaska · 2351 days ago · 25 km deep · 35 km away
  46. 1.897 km SW of Atka, Alaska · 2349 days ago · 26 km deep · 48 km away
  47. 1.564 km SSE of Adak, Alaska · 2349 days ago · 22 km deep · 32 km away
  48. 3.021 km SSE of Adak, Alaska · 2348 days ago · 64 km deep · 71 km away
  49. 1.811 km SSE of Adak, Alaska · 2348 days ago · 62 km deep · 78 km away
  50. 1.86 km SSE of Adak, Alaska · 2348 days ago · 66 km deep · 82 km away
  51. 2.289 km SE of Adak, Alaska · 2348 days ago · 27 km deep · 16 km away
  52. 2.662 km ESE of Adak, Alaska · 2347 days ago · 35 km deep · 32 km away
  53. 1.777 km WSW of Atka, Alaska · 2346 days ago · 84 km deep · 83 km away
  54. 1.667 km S of Adak, Alaska · 2346 days ago · 26 km deep · 60 km away
  55. 1.774 km SSE of Adak, Alaska · 2345 days ago · 20 km deep · 50 km away
  56. 3.620 km E of Adak, Alaska · 2345 days ago · 79 km deep · 75 km away
  57. 2.862 km ENE of Adak, Alaska · 2344 days ago · 193 km deep · 84 km away
  58. 1.747 km S of Adak, Alaska · 2344 days ago · 25 km deep · 59 km away
  59. 2.753 km SE of Adak, Alaska · 2344 days ago · 35 km deep · 38 km away
  60. 1.776 km S of Adak, Alaska · 2344 days ago · 26 km deep · 52 km away

The first 60 of 198.

Before

  1. 2.167 km ENE of Adak, Alaska · 2364 days ago · 151 km deep · 99 km away
  2. 1.687 km SSW of Atka, Alaska · 2364 days ago · 26 km deep · 77 km away
  3. 3.092 km SW of Atka, Alaska · 2365 days ago · 35 km deep · 50 km away
  4. 1.842 km SSE of Adak, Alaska · 2365 days ago · 32 km deep · 50 km away
  5. 1.9Andreanof Islands, Aleutian Islands, Alaska · 2366 days ago · 5 km deep · 86 km away
  6. 1.669 km SSW of Adak, Alaska · 2367 days ago · 21 km deep · 90 km away
  7. 2.042 km ENE of Adak, Alaska · 2367 days ago · 7 km deep · 82 km away
  8. 2.652 km SSE of Adak, Alaska · 2368 days ago · 35 km deep · 42 km away
  9. 2.587 km SE of Adak, Alaska · 2368 days ago · 29 km deep · 8 km away
  10. 2.677 km SE of Adak, Alaska · 2368 days ago · 34 km deep · 11 km away
  11. 2.246 km NE of Adak, Alaska · 2371 days ago · 208 km deep · 94 km away
  12. 1.646 km SW of Atka, Alaska · 2371 days ago · 13 km deep · 97 km away
  13. 1.983 km E of Adak, Alaska · 2371 days ago · 83 km deep · 72 km away
  14. 1.564 km SE of Adak, Alaska · 2372 days ago · 23 km deep · 24 km away
  15. 1.567 km SSW of Adak, Alaska · 2372 days ago · 35 km deep · 98 km away
  16. 2.872 km SW of Atka, Alaska · 2373 days ago · 26 km deep · 71 km away
  17. 2.054 km SSE of Adak, Alaska · 2374 days ago · 25 km deep · 39 km away
  18. 3.057 km SSW of Atka, Alaska · 2374 days ago · 69 km deep · 89 km away
  19. 2.144 km ENE of Adak, Alaska · 2375 days ago · 9 km deep · 84 km away
  20. 3.244 km SSW of Adak, Alaska · 2376 days ago · 34 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009ecv (also filed as ak0204vmkjia). Read Mon, Oct 5, 2026, 1:01 AM UTC.