Alaska earthquakes

M1.9 earthquake 43 km SE of Atka, Alaska

A magnitude 1.9 earthquake struck 43 km SE of Atka, Alaska on Sun, Apr 18, 2021, 4:58 AM HADT (13:58 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M5.1 75 km SE 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
1.9 (ml), micro
Local time
UTC
2021-04-18 13:58:30 UTC
Depth
16.6 km (10.3 mi), shallow
Epicenter
51.925° N, 173.746° 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
18

Nearby

Within 100 km, magnitude 1.5 and up: 43 in the 60 days after this one and 46 in the 30 days before it.

After

  1. 1.861 km E of Atka, Alaska · 1989 days ago · 13 km deep · 41 km away
  2. 2.933 km S of Atka, Alaska · 1988 days ago · 3 km deep · 32 km away
  3. 2.228 km SE of Atka, Alaska · 1988 days ago · 70 km deep · 16 km away
  4. 1.683 km SW of Atka, Alaska · 1986 days ago · 26 km deep · 100 km away
  5. 2.220 km E of Atka, Alaska · 1985 days ago · 115 km deep · 35 km away
  6. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1985 days ago · 192 km deep · 68 km away
  7. 2.237 km ESE of Atka, Alaska · 1984 days ago · 153 km deep · 21 km away
  8. 2.154 km E of Atka, Alaska · 1984 days ago · 88 km deep · 34 km away
  9. 2.120 km ESE of Atka, Alaska · 1984 days ago · 146 km deep · 26 km away
  10. 3.168 km SE of Atka, Alaska · 1984 days ago · 35 km deep · 26 km away
  11. 1.766 km SW of Atka, Alaska · 1984 days ago · 63 km deep · 83 km away
  12. 1.771 km SW of Atka, Alaska · 1983 days ago · 38 km deep · 89 km away
  13. 1.978 km SE of Atka, Alaska · 1983 days ago · 12 km deep · 36 km away
  14. 2.968 km E of Atka, Alaska · 1982 days ago · 223 km deep · 56 km away
  15. 2.256 km WNW of Atka, Alaska · 1981 days ago · 78 km deep · 97 km away
  16. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1981 days ago · 6 km deep · 51 km away
  17. 1.943 km SSW of Atka, Alaska · 1980 days ago · 44 km deep · 44 km away
  18. 2.194 km SE of Atka, Alaska · 1978 days ago · 18 km deep · 51 km away
  19. 2.363 km S of Atka, Alaska · 1978 days ago · 21 km deep · 45 km away
  20. 3.7126 km SSE of Atka, Alaska · 1976 days ago · 38 km deep · 87 km away
  21. 3.345 km SSE of Atka, Alaska · 1975 days ago · 56 km deep · 12 km away
  22. 2.684 km SSE of Atka, Alaska · 1964 days ago · 35 km deep · 44 km away
  23. 2.955 km SW of Atka, Alaska · 1963 days ago · 51 km deep · 69 km away
  24. 2.579 km WSW of Atka, Alaska · 1962 days ago · 57 km deep · 99 km away
  25. 3.955 km SSE of Atka, Alaska · 1956 days ago · 35 km deep · 24 km away
  26. 4.295 km SE of Atka, Alaska · 1955 days ago · 16 km deep · 52 km away
  27. 4.281 km SE of Atka, Alaska · 1955 days ago · 41 km deep · 39 km away
  28. 5.175 km SE of Atka, Alaska · 1955 days ago · 21 km deep · 32 km away
  29. 3.879 km SE of Atka, Alaska · 1955 days ago · 45 km deep · 36 km away
  30. 3.6123 km SSE of Atka, Alaska · 1955 days ago · 39 km deep · 81 km away
  31. 4.198 km SE of Atka, Alaska · 1955 days ago · 45 km deep · 56 km away
  32. 4.099 km SE of Atka, Alaska · 1955 days ago · 35 km deep · 56 km away
  33. 4.245 km E of Atka, Alaska · 1947 days ago · 148 km deep · 34 km away
  34. 2.042 km SW of Atka, Alaska · 1946 days ago · 55 km deep · 61 km away
  35. 2.4118 km SSE of Atka, Alaska · 1946 days ago · 37 km deep · 86 km away
  36. 3.3107 km SSE of Atka, Alaska · 1943 days ago · 33 km deep · 66 km away
  37. 2.0141 km SE of Atka, Alaska · 1943 days ago · 24 km deep · 98 km away
  38. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1937 days ago · 35 km deep · 78 km away
  39. 2.9Andreanof Islands, Aleutian Islands, Alaska · 1936 days ago · 35 km deep · 59 km away
  40. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1934 days ago · 35 km deep · 25 km away
  41. 4.189 km SSE of Atka, Alaska · 1934 days ago · 30 km deep · 49 km away
  42. 2.915 km NNE of Atka, Alaska · 1934 days ago · 178 km deep · 52 km away
  43. 2.193 km SW of Atka, Alaska · 1930 days ago · 24 km deep · 98 km away

Before

  1. 1.815 km SSW of Atka, Alaska · 1989 days ago · 74 km deep · 41 km away
  2. 2.5120 km E of Atka, Alaska · 1990 days ago · 102 km deep · 96 km away
  3. 1.863 km E of Atka, Alaska · 1990 days ago · 4 km deep · 52 km away
  4. 3.646 km N of Atka, Alaska · 1990 days ago · 192 km deep · 83 km away
  5. 1.628 km SE of Atka, Alaska · 1991 days ago · 11 km deep · 17 km away
  6. 1.978 km SSE of Atka, Alaska · 1991 days ago · 17 km deep · 40 km away
  7. 1.654 km E of Atka, Alaska · 1991 days ago · 13 km deep · 37 km away
  8. 3.149 km SW of Atka, Alaska · 1992 days ago · 10 km deep · 70 km away
  9. 2.047 km ESE of Atka, Alaska · 1992 days ago · 65 km deep · 23 km away
  10. 2.086 km S of Atka, Alaska · 1992 days ago · 26 km deep · 68 km away
  11. 3.629 km NE of Atka, AK · 1995 days ago · 174 km deep · 48 km away
  12. 3.467 km ENE of Atka, Alaska · 1997 days ago · 10 km deep · 58 km away
  13. 2.7139 km SE of Atka, Alaska · 1997 days ago · 10 km deep · 96 km away
  14. 2.6115 km S of Atka, Alaska · 1999 days ago · 10 km deep · 93 km away
  15. 2.7121 km S of Atka, Alaska · 1999 days ago · 10 km deep · 99 km away
  16. 2.163 km ESE of Atka, Alaska · 1999 days ago · 24 km deep · 24 km away
  17. 1.736 km W of Atka, Alaska · 1999 days ago · 25 km deep · 73 km away
  18. 3.9Andreanof Islands, Aleutian Islands, Alaska · 2000 days ago · 221 km deep · 95 km away
  19. 3.687 km SW of Atka, Alaska · 2000 days ago · 35 km deep · 96 km away
  20. 2.59 km SSE of Atka, Alaska · 2000 days ago · 187 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0214yu4mak. Read Mon, Sep 28, 2026, 4:39 PM UTC.