Alaska earthquakes

M1.7 earthquake 66 km SW of Atka, Alaska

A magnitude 1.7 earthquake struck 66 km SW of Atka, Alaska on Fri, Apr 23, 2021, 10:50 AM HADT (19:50 UTC), 63 km (39 mi) below the surface.

A larger quake followed: M3.8 93 km ESE 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
1.7 (ml), micro
Local time
UTC
2021-04-23 19:50:48 UTC
Depth
62.5 km (38.8 mi), shallow
Epicenter
51.819° N, 174.944° 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
19

Nearby

Within 100 km, magnitude 1.5 and up: 43 in the 60 days after this one and 78 in the 30 days before it.

After

  1. 3.893 km ESE of Adak, Alaska · 1979 days ago · 50 km deep · 31 km away
  2. 1.771 km SW of Atka, Alaska · 1979 days ago · 38 km deep · 7 km away
  3. 2.5Andreanof Islands, Aleutian Islands, Alaska · 1978 days ago · 35 km deep · 35 km away
  4. 2.881 km SE of Adak, Alaska · 1978 days ago · 33 km deep · 65 km away
  5. 2.057 km SSE of Adak, Alaska · 1978 days ago · 27 km deep · 96 km away
  6. 2.256 km WNW of Atka, Alaska · 1977 days ago · 78 km deep · 60 km away
  7. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1976 days ago · 6 km deep · 49 km away
  8. 1.860 km SE of Adak, Alaska · 1976 days ago · 26 km deep · 91 km away
  9. 1.943 km SSW of Atka, Alaska · 1976 days ago · 44 km deep · 39 km away
  10. 1.746 km ENE of Adak, Alaska · 1976 days ago · 8 km deep · 79 km away
  11. 2.869 km ENE of Adak, Alaska · 1975 days ago · 82 km deep · 55 km away
  12. 2.145 km E of Adak, Alaska · 1974 days ago · 127 km deep · 72 km away
  13. 1.8119 km SSW of Atka, Alaska · 1974 days ago · 7 km deep · 63 km away
  14. 2.363 km S of Atka, Alaska · 1974 days ago · 21 km deep · 56 km away
  15. 1.727 km ESE of Adak, Alaska · 1974 days ago · 98 km deep · 92 km away
  16. 3.856 km NE of Adak, Alaska · 1973 days ago · 155 km deep · 98 km away
  17. 3.345 km SSE of Atka, Alaska · 1971 days ago · 56 km deep · 75 km away
  18. 3.6100 km SW of Atka, Alaska · 1969 days ago · 35 km deep · 36 km away
  19. 1.849 km SE of Adak, Alaska · 1969 days ago · 30 km deep · 93 km away
  20. 1.599 km SW of Atka, Alaska · 1960 days ago · 26 km deep · 35 km away
  21. 1.934 km ENE of Adak, Alaska · 1960 days ago · 132 km deep · 84 km away
  22. 3.199 km ESE of Adak, Alaska · 1960 days ago · 35 km deep · 35 km away
  23. 2.684 km SSE of Atka, Alaska · 1960 days ago · 35 km deep · 99 km away
  24. 2.955 km SW of Atka, Alaska · 1959 days ago · 51 km deep · 14 km away
  25. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1959 days ago · 29 km deep · 42 km away
  26. 2.579 km WSW of Atka, Alaska · 1958 days ago · 57 km deep · 16 km away
  27. 1.957 km SSE of Adak, Alaska · 1957 days ago · 26 km deep · 100 km away
  28. 3.955 km SSE of Atka, Alaska · 1951 days ago · 35 km deep · 73 km away
  29. 1.539 km NE of Adak, Alaska · 1947 days ago · 10 km deep · 92 km away
  30. 1.637 km NE of Adak, Alaska · 1947 days ago · 10 km deep · 94 km away
  31. 1.638 km NE of Adak, Alaska · 1947 days ago · 8 km deep · 94 km away
  32. 2.984 km E of Adak, Alaska · 1947 days ago · 238 km deep · 34 km away
  33. 2.744 km E of Adak, Alaska · 1944 days ago · 69 km deep · 72 km away
  34. 2.039 km ESE of Adak, Alaska · 1942 days ago · 62 km deep · 78 km away
  35. 2.042 km SW of Atka, Alaska · 1942 days ago · 55 km deep · 24 km away
  36. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1932 days ago · 35 km deep · 83 km away
  37. 2.873 km ESE of Adak, Alaska · 1931 days ago · 70 km deep · 46 km away
  38. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1930 days ago · 35 km deep · 88 km away
  39. 2.915 km NNE of Atka, Alaska · 1930 days ago · 178 km deep · 79 km away
  40. 1.640 km ENE of Adak, Alaska · 1930 days ago · 154 km deep · 86 km away
  41. 2.193 km SW of Atka, Alaska · 1926 days ago · 24 km deep · 34 km away
  42. 1.9105 km SSW of Atka, Alaska · 1923 days ago · 64 km deep · 47 km away
  43. 1.694 km ESE of Adak, Alaska · 1923 days ago · 36 km deep · 34 km away

Before

  1. 2.120 km ESE of Atka, Alaska · 1980 days ago · 146 km deep · 79 km away
  2. 2.237 km ESE of Atka, Alaska · 1980 days ago · 153 km deep · 93 km away
  3. 2.635 km NE of Adak, Alaska · 1980 days ago · 10 km deep · 92 km away
  4. 2.232 km NE of Adak, Alaska · 1980 days ago · 9 km deep · 98 km away
  5. 1.834 km ENE of Adak, Alaska · 1980 days ago · 11 km deep · 90 km away
  6. 3.7106 km ESE of Adak, Alaska · 1981 days ago · 35 km deep · 42 km away
  7. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1981 days ago · 192 km deep · 66 km away
  8. 2.220 km E of Atka, Alaska · 1981 days ago · 115 km deep · 84 km away
  9. 2.0Andreanof Islands, Aleutian Islands, Alaska · 1982 days ago · 69 km deep · 70 km away
  10. 1.683 km SW of Atka, Alaska · 1982 days ago · 26 km deep · 18 km away
  11. 2.454 km ENE of Adak, Alaska · 1982 days ago · 197 km deep · 72 km away
  12. 1.861 km SSE of Adak, Alaska · 1982 days ago · 16 km deep · 95 km away
  13. 1.9121 km SSW of Atka, Alaska · 1984 days ago · 8 km deep · 67 km away
  14. 2.6102 km ESE of Adak, Alaska · 1984 days ago · 35 km deep · 41 km away
  15. 1.681 km SE of Adak, Alaska · 1984 days ago · 25 km deep · 74 km away
  16. 2.228 km SE of Atka, Alaska · 1984 days ago · 70 km deep · 71 km away
  17. 3.9Andreanof Islands, Aleutian Islands, Alaska · 1984 days ago · 221 km deep · 98 km away
  18. 2.933 km S of Atka, Alaska · 1984 days ago · 3 km deep · 51 km away
  19. 1.756 km E of Adak, Alaska · 1985 days ago · 71 km deep · 60 km away
  20. 1.678 km E of Adak, Alaska · 1985 days ago · 71 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021577c9ui. Read Thu, Sep 24, 2026, 8:40 AM UTC.