Alaska earthquakes

M2.6 earthquake 107 km SE of Adak, Alaska

A magnitude 2.6 earthquake struck 107 km SE of Adak, Alaska on Mon, Apr 20, 2020, 3:19 PM HADT (00:19 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
2.6 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-04-21 00:19:24 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.310° N, 175.368° 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
2.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.148 · 6 stations
2.1ML, 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 3.5 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
253°, poorly surrounded by stations
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: 170 in the 60 days after this one and 66 in the 30 days before it.

After

  1. 3.457 km SE of Adak, Alaska · 2355 days ago · 35 km deep · 55 km away
  2. 1.662 km SE of Adak, Alaska · 2355 days ago · 13 km deep · 53 km away
  3. 2.857 km SW of Atka, Alaska · 2354 days ago · 35 km deep · 70 km away
  4. 3.638 km WSW of Atka, Alaska · 2354 days ago · 82 km deep · 94 km away
  5. 2.272 km SE of Adak, Alaska · 2354 days ago · 27 km deep · 37 km away
  6. 1.763 km SE of Adak, Alaska · 2353 days ago · 24 km deep · 46 km away
  7. 1.673 km SSE of Adak, Alaska · 2352 days ago · 13 km deep · 59 km away
  8. 3.062 km SE of Adak, Alaska · 2352 days ago · 35 km deep · 46 km away
  9. 2.324 km ESE of Adak, Alaska · 2351 days ago · 71 km deep · 84 km away
  10. 1.8114 km SW of Atka, Alaska · 2351 days ago · 31 km deep · 16 km away
  11. 2.769 km SW of Atka, Alaska · 2350 days ago · 56 km deep · 60 km away
  12. 1.866 km SW of Atka, Alaska · 2350 days ago · 47 km deep · 66 km away
  13. 1.797 km SE of Adak, Alaska · 2350 days ago · 19 km deep · 10 km away
  14. 1.823 km SE of Adak, Alaska · 2350 days ago · 64 km deep · 84 km away
  15. 2.851 km SSE of Adak, Alaska · 2348 days ago · 41 km deep · 73 km away
  16. 2.098 km ESE of Adak, Alaska · 2348 days ago · 25 km deep · 25 km away
  17. 1.897 km SW of Atka, Alaska · 2346 days ago · 26 km deep · 30 km away
  18. 1.564 km SSE of Adak, Alaska · 2345 days ago · 22 km deep · 56 km away
  19. 3.021 km SSE of Adak, Alaska · 2345 days ago · 64 km deep · 93 km away
  20. 1.811 km SSE of Adak, Alaska · 2345 days ago · 62 km deep · 98 km away
  21. 2.289 km SE of Adak, Alaska · 2344 days ago · 27 km deep · 19 km away
  22. 2.662 km ESE of Adak, Alaska · 2344 days ago · 35 km deep · 46 km away
  23. 1.777 km WSW of Atka, Alaska · 2343 days ago · 84 km deep · 79 km away
  24. 1.667 km S of Adak, Alaska · 2342 days ago · 26 km deep · 83 km away
  25. 1.774 km SSE of Adak, Alaska · 2342 days ago · 20 km deep · 73 km away
  26. 3.620 km E of Adak, Alaska · 2341 days ago · 79 km deep · 92 km away
  27. 2.862 km ENE of Adak, Alaska · 2341 days ago · 193 km deep · 91 km away
  28. 1.747 km S of Adak, Alaska · 2341 days ago · 25 km deep · 82 km away
  29. 2.753 km SE of Adak, Alaska · 2341 days ago · 35 km deep · 61 km away
  30. 1.776 km S of Adak, Alaska · 2340 days ago · 26 km deep · 75 km away
  31. 3.067 km SSE of Adak, Alaska · 2340 days ago · 35 km deep · 55 km away
  32. 3.533 km SSE of Adak, Alaska · 2339 days ago · 48 km deep · 81 km away
  33. 2.867 km SSE of Adak, Alaska · 2339 days ago · 35 km deep · 53 km away
  34. 1.844 km SSE of Adak, Alaska · 2339 days ago · 25 km deep · 71 km away
  35. 1.970 km SW of Atka, Alaska · 2339 days ago · 41 km deep · 59 km away
  36. 1.672 km WSW of Atka, Alaska · 2338 days ago · 70 km deep · 74 km away
  37. 1.8121 km SSW of Atka, Alaska · 2338 days ago · 21 km deep · 24 km away
  38. 1.8104 km S of Adak, Alaska · 2338 days ago · 12 km deep · 80 km away
  39. 1.832 km SE of Adak, Alaska · 2338 days ago · 53 km deep · 78 km away
  40. 2.8104 km ESE of Adak, Alaska · 2338 days ago · 35 km deep · 10 km away
  41. 1.875 km E of Adak, Alaska · 2337 days ago · 162 km deep · 52 km away
  42. 1.8152 km SE of Adak, Alaska · 2337 days ago · 12 km deep · 48 km away
  43. 1.9105 km SSE of Adak, Alaska · 2337 days ago · 38 km deep · 78 km away
  44. 1.559 km WSW of Atka, Alaska · 2337 days ago · 53 km deep · 85 km away
  45. 3.169 km ESE of Adak, Alaska · 2336 days ago · 70 km deep · 50 km away
  46. 2.1Andreanof Islands, Aleutian Islands, Alaska · 2335 days ago · 16 km deep · 80 km away
  47. 2.1103 km S of Adak, Alaska · 2335 days ago · 20 km deep · 80 km away
  48. 2.1102 km S of Adak, Alaska · 2335 days ago · 13 km deep · 78 km away
  49. 2.2110 km SSE of Adak, Alaska · 2335 days ago · 22 km deep · 80 km away
  50. 1.995 km S of Adak, Alaska · 2335 days ago · 25 km deep · 80 km away
  51. 2.943 km SSE of Adak, Alaska · 2335 days ago · 35 km deep · 71 km away
  52. 1.972 km SW of Atka, Alaska · 2335 days ago · 20 km deep · 54 km away
  53. 2.953 km SE of Adak, Alaska · 2335 days ago · 58 km deep · 54 km away
  54. 3.6106 km S of Adak, Alaska · 2335 days ago · 10 km deep · 82 km away
  55. 1.9101 km S of Adak, Alaska · 2334 days ago · 12 km deep · 79 km away
  56. 2.6112 km S of Adak, Alaska · 2334 days ago · 10 km deep · 83 km away
  57. 4.0117 km S of Adak, Alaska · 2334 days ago · 10 km deep · 85 km away
  58. 1.9101 km S of Adak, Alaska · 2334 days ago · 11 km deep · 79 km away
  59. 1.897 km S of Adak, Alaska · 2334 days ago · 11 km deep · 78 km away
  60. 3.1109 km S of Adak, Alaska · 2334 days ago · 26 km deep · 84 km away

The first 60 of 170.

Before

  1. 3.3105 km SE of Adak, Alaska · 2355 days ago · 28 km deep · 3 km away
  2. 1.765 km SE of Adak, Alaska · 2355 days ago · 13 km deep · 49 km away
  3. 2.966 km SW of Atka, Alaska · 2355 days ago · 72 km deep · 65 km away
  4. 1.695 km SE of Adak, Alaska · 2356 days ago · 25 km deep · 12 km away
  5. 3.0121 km SSW of Atka, Alaska · 2356 days ago · 12 km deep · 33 km away
  6. 1.532 km SSE of Adak, Alaska · 2356 days ago · 49 km deep · 79 km away
  7. 2.870 km ENE of Adak, Alaska · 2356 days ago · 113 km deep · 97 km away
  8. 1.568 km SE of Adak, Alaska · 2356 days ago · 26 km deep · 40 km away
  9. 1.784 km S of Adak, Alaska · 2357 days ago · 26 km deep · 99 km away
  10. 1.9144 km S of Adak, Alaska · 2357 days ago · 23 km deep · 100 km away
  11. 2.655 km S of Atka, Alaska · 2358 days ago · 35 km deep · 97 km away
  12. 2.563 km SE of Adak, Alaska · 2358 days ago · 35 km deep · 46 km away
  13. 2.789 km SW of Atka, Alaska · 2358 days ago · 28 km deep · 40 km away
  14. 2.896 km SSE of Adak, Alaska · 2358 days ago · 10 km deep · 71 km away
  15. 1.655 km SSE of Adak, Alaska · 2359 days ago · 23 km deep · 68 km away
  16. 2.063 km SSE of Adak, Alaska · 2359 days ago · 26 km deep · 72 km away
  17. 2.7131 km SSW of Atka, Alaska · 2359 days ago · 24 km deep · 43 km away
  18. 2.9129 km SSW of Atka, Alaska · 2359 days ago · 10 km deep · 38 km away
  19. 2.7130 km SSW of Atka, Alaska · 2359 days ago · 18 km deep · 37 km away
  20. 2.945 km ENE of Adak, Alaska · 2360 days ago · 148 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009g9x (also filed as ak020558azpn). Read Thu, Oct 1, 2026, 2:27 PM UTC.