Alaska earthquakes

M1.6 earthquake 83 km SW of Atka, Alaska

A magnitude 1.6 earthquake struck 83 km SW of Atka, Alaska on Wed, Apr 21, 2021, 8:12 AM HADT (17:12 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M3.9 55 km SSE 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
1.6 (ml), micro
Local time
UTC
2021-04-21 17:12:11 UTC
Depth
25.6 km (15.9 mi), shallow
Epicenter
51.740° N, 175.168° 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.

Stations used
15

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 82 in the 30 days before it.

After

  1. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1987 days ago · 69 km deep · 55 km away
  2. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1986 days ago · 192 km deep · 81 km away
  3. 3.7106 km ESE of Adak, Alaska · 1986 days ago · 35 km deep · 28 km away
  4. 1.834 km ENE of Adak, Alaska · 1986 days ago · 11 km deep · 79 km away
  5. 2.232 km NE of Adak, Alaska · 1986 days ago · 9 km deep · 87 km away
  6. 2.635 km NE of Adak, Alaska · 1986 days ago · 10 km deep · 81 km away
  7. 2.120 km ESE of Atka, Alaska · 1985 days ago · 146 km deep · 97 km away
  8. 1.766 km SW of Atka, Alaska · 1985 days ago · 63 km deep · 18 km away
  9. 3.893 km ESE of Adak, Alaska · 1985 days ago · 50 km deep · 13 km away
  10. 1.771 km SW of Atka, Alaska · 1984 days ago · 38 km deep · 13 km away
  11. 2.5Andreanof Islands, Aleutian Islands, Alaska · 1983 days ago · 35 km deep · 22 km away
  12. 2.881 km SE of Adak, Alaska · 1983 days ago · 33 km deep · 47 km away
  13. 2.057 km SSE of Adak, Alaska · 1983 days ago · 27 km deep · 78 km away
  14. 2.256 km WNW of Atka, Alaska · 1982 days ago · 78 km deep · 70 km away
  15. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1982 days ago · 6 km deep · 66 km away
  16. 1.860 km SE of Adak, Alaska · 1981 days ago · 26 km deep · 74 km away
  17. 1.943 km SSW of Atka, Alaska · 1981 days ago · 44 km deep · 56 km away
  18. 1.746 km ENE of Adak, Alaska · 1981 days ago · 8 km deep · 69 km away
  19. 2.041 km SSE of Adak, Alaska · 1981 days ago · 36 km deep · 87 km away
  20. 2.869 km ENE of Adak, Alaska · 1980 days ago · 82 km deep · 48 km away
  21. 2.145 km E of Adak, Alaska · 1980 days ago · 127 km deep · 60 km away
  22. 1.8119 km SSW of Atka, Alaska · 1979 days ago · 7 km deep · 55 km away
  23. 1.643 km S of Adak, Alaska · 1979 days ago · 44 km deep · 100 km away
  24. 2.363 km S of Atka, Alaska · 1979 days ago · 21 km deep · 69 km away
  25. 1.727 km ESE of Adak, Alaska · 1979 days ago · 98 km deep · 76 km away
  26. 3.856 km NE of Adak, Alaska · 1978 days ago · 155 km deep · 91 km away
  27. 3.345 km SSE of Atka, Alaska · 1976 days ago · 56 km deep · 91 km away
  28. 3.6100 km SW of Atka, Alaska · 1975 days ago · 35 km deep · 22 km away
  29. 1.849 km SE of Adak, Alaska · 1974 days ago · 30 km deep · 75 km away
  30. 1.599 km SW of Atka, Alaska · 1966 days ago · 26 km deep · 23 km away
  31. 1.934 km ENE of Adak, Alaska · 1965 days ago · 132 km deep · 72 km away
  32. 3.199 km ESE of Adak, Alaska · 1965 days ago · 35 km deep · 19 km away
  33. 2.955 km SW of Atka, Alaska · 1964 days ago · 51 km deep · 31 km away
  34. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1964 days ago · 29 km deep · 27 km away
  35. 3.831 km SSE of Adak, Alaska · 1964 days ago · 50 km deep · 85 km away
  36. 2.579 km WSW of Atka, Alaska · 1963 days ago · 57 km deep · 8 km away
  37. 1.957 km SSE of Adak, Alaska · 1962 days ago · 26 km deep · 82 km away
  38. 3.955 km SSE of Atka, Alaska · 1957 days ago · 35 km deep · 88 km away
  39. 1.539 km NE of Adak, Alaska · 1953 days ago · 10 km deep · 82 km away
  40. 1.637 km NE of Adak, Alaska · 1953 days ago · 10 km deep · 84 km away
  41. 1.638 km NE of Adak, Alaska · 1953 days ago · 8 km deep · 84 km away
  42. 2.984 km E of Adak, Alaska · 1952 days ago · 238 km deep · 27 km away
  43. 2.744 km E of Adak, Alaska · 1949 days ago · 69 km deep · 58 km away
  44. 2.039 km ESE of Adak, Alaska · 1947 days ago · 62 km deep · 63 km away
  45. 2.042 km SW of Atka, Alaska · 1947 days ago · 55 km deep · 42 km away
  46. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1938 days ago · 35 km deep · 88 km away
  47. 2.873 km ESE of Adak, Alaska · 1936 days ago · 70 km deep · 30 km away
  48. 2.915 km NNE of Atka, Alaska · 1935 days ago · 178 km deep · 97 km away
  49. 1.640 km ENE of Adak, Alaska · 1935 days ago · 154 km deep · 75 km away
  50. 2.193 km SW of Atka, Alaska · 1931 days ago · 24 km deep · 28 km away
  51. 1.754 km SSE of Adak, Alaska · 1929 days ago · 27 km deep · 96 km away
  52. 1.9105 km SSW of Atka, Alaska · 1929 days ago · 64 km deep · 38 km away
  53. 1.694 km ESE of Adak, Alaska · 1929 days ago · 36 km deep · 17 km away

Before

  1. 2.454 km ENE of Adak, Alaska · 1987 days ago · 197 km deep · 63 km away
  2. 1.861 km SSE of Adak, Alaska · 1988 days ago · 16 km deep · 77 km away
  3. 1.741 km SSE of Adak, Alaska · 1989 days ago · 33 km deep · 85 km away
  4. 1.855 km SSE of Adak, Alaska · 1989 days ago · 21 km deep · 83 km away
  5. 1.9121 km SSW of Atka, Alaska · 1989 days ago · 8 km deep · 60 km away
  6. 2.6102 km ESE of Adak, Alaska · 1989 days ago · 35 km deep · 26 km away
  7. 1.681 km SE of Adak, Alaska · 1989 days ago · 25 km deep · 56 km away
  8. 2.228 km SE of Atka, Alaska · 1989 days ago · 70 km deep · 88 km away
  9. 1.861 km SSE of Adak, Alaska · 1989 days ago · 22 km deep · 83 km away
  10. 2.933 km S of Atka, Alaska · 1989 days ago · 3 km deep · 68 km away
  11. 1.737 km SSE of Adak, Alaska · 1990 days ago · 57 km deep · 96 km away
  12. 1.756 km E of Adak, Alaska · 1990 days ago · 71 km deep · 47 km away
  13. 1.678 km E of Adak, Alaska · 1990 days ago · 71 km deep · 27 km away
  14. 1.943 km SE of Atka, Alaska · 1990 days ago · 17 km deep · 100 km away
  15. 1.815 km SSW of Atka, Alaska · 1990 days ago · 74 km deep · 71 km away
  16. 1.575 km SSE of Adak, Alaska · 1990 days ago · 26 km deep · 91 km away
  17. 2.182 km E of Adak, Alaska · 1991 days ago · 116 km deep · 33 km away
  18. 1.767 km SSE of Adak, Alaska · 1991 days ago · 12 km deep · 91 km away
  19. 3.898 km SSE of Adak, Alaska · 1991 days ago · 10 km deep · 91 km away
  20. 1.662 km SSE of Adak, Alaska · 1991 days ago · 22 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak02153uuhk9. Read Tue, Sep 29, 2026, 4:45 PM UTC.