Alaska earthquakes

M3.3 earthquake 45 km SSE of Atka, Alaska

A magnitude 3.3 earthquake struck 45 km SSE of Atka, Alaska on Sat, May 1, 2021, 10:59 PM HADT (07:59 UTC), 56 km (35 mi) below the surface.

A larger quake followed: M3.6 100 km SW 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
3.3 (mb), minor
Local time
UTC
2021-05-02 07:59:53 UTC
Depth
56.2 km (34.9 mi), shallow
Epicenter
51.842° N, 173.858° 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.

Location uncertainty
About 10.3 km horizontally, 13.3 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
209°, poorly surrounded by stations
Stations used
40

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 55 in the 30 days before it.

After

  1. 3.6100 km SW of Atka, Alaska · 1969 days ago · 35 km deep · 99 km away
  2. 1.599 km SW of Atka, Alaska · 1960 days ago · 26 km deep · 97 km away
  3. 2.684 km SSE of Atka, Alaska · 1960 days ago · 35 km deep · 39 km away
  4. 2.955 km SW of Atka, Alaska · 1959 days ago · 51 km deep · 61 km away
  5. 2.579 km WSW of Atka, Alaska · 1958 days ago · 57 km deep · 90 km away
  6. 2.1140 km SSE of Atka, Alaska · 1955 days ago · 38 km deep · 96 km away
  7. 3.955 km SSE of Atka, Alaska · 1951 days ago · 35 km deep · 12 km away
  8. 4.295 km SE of Atka, Alaska · 1951 days ago · 16 km deep · 51 km away
  9. 4.281 km SE of Atka, Alaska · 1951 days ago · 41 km deep · 40 km away
  10. 5.175 km SE of Atka, Alaska · 1951 days ago · 21 km deep · 34 km away
  11. 3.879 km SE of Atka, Alaska · 1951 days ago · 45 km deep · 36 km away
  12. 3.6123 km SSE of Atka, Alaska · 1951 days ago · 39 km deep · 77 km away
  13. 4.198 km SE of Atka, Alaska · 1951 days ago · 45 km deep · 54 km away
  14. 4.099 km SE of Atka, Alaska · 1951 days ago · 35 km deep · 55 km away
  15. 4.245 km E of Atka, Alaska · 1943 days ago · 148 km deep · 46 km away
  16. 2.042 km SW of Atka, Alaska · 1942 days ago · 55 km deep · 54 km away
  17. 2.4118 km SSE of Atka, Alaska · 1942 days ago · 37 km deep · 77 km away
  18. 3.3107 km SSE of Atka, Alaska · 1939 days ago · 33 km deep · 61 km away
  19. 2.0141 km SE of Atka, Alaska · 1939 days ago · 24 km deep · 98 km away
  20. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1932 days ago · 35 km deep · 66 km away
  21. 2.9Andreanof Islands, Aleutian Islands, Alaska · 1931 days ago · 35 km deep · 57 km away
  22. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1930 days ago · 35 km deep · 20 km away
  23. 4.189 km SSE of Atka, Alaska · 1930 days ago · 30 km deep · 44 km away
  24. 2.915 km NNE of Atka, Alaska · 1930 days ago · 178 km deep · 57 km away
  25. 2.193 km SW of Atka, Alaska · 1926 days ago · 24 km deep · 87 km away
  26. 1.9105 km SSW of Atka, Alaska · 1924 days ago · 64 km deep · 96 km away
  27. 2.994 km SE of Atka, Alaska · 1919 days ago · 11 km deep · 49 km away
  28. 2.4135 km SSE of Atka, Alaska · 1914 days ago · 32 km deep · 93 km away
  29. 4.066 km ESE of Atka, AK · 1914 days ago · 63 km deep · 45 km away
  30. 4.6125 km ESE of Atka, Alaska · 1912 days ago · 21 km deep · 98 km away
  31. 2.330 km SW of Atka, Alaska · 1912 days ago · 76 km deep · 50 km away

Before

  1. 3.7126 km SSE of Atka, Alaska · 1972 days ago · 38 km deep · 81 km away
  2. 2.363 km S of Atka, Alaska · 1974 days ago · 21 km deep · 33 km away
  3. 2.194 km SE of Atka, Alaska · 1974 days ago · 18 km deep · 50 km away
  4. 1.943 km SSW of Atka, Alaska · 1976 days ago · 44 km deep · 35 km away
  5. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1976 days ago · 6 km deep · 49 km away
  6. 2.256 km WNW of Atka, Alaska · 1977 days ago · 78 km deep · 95 km away
  7. 2.5Andreanof Islands, Aleutian Islands, Alaska · 1978 days ago · 35 km deep · 99 km away
  8. 2.968 km E of Atka, Alaska · 1978 days ago · 223 km deep · 68 km away
  9. 1.978 km SE of Atka, Alaska · 1978 days ago · 12 km deep · 37 km away
  10. 1.771 km SW of Atka, Alaska · 1979 days ago · 38 km deep · 81 km away
  11. 1.766 km SW of Atka, Alaska · 1980 days ago · 63 km deep · 75 km away
  12. 3.168 km SE of Atka, Alaska · 1980 days ago · 35 km deep · 31 km away
  13. 2.120 km ESE of Atka, Alaska · 1980 days ago · 146 km deep · 33 km away
  14. 2.154 km E of Atka, Alaska · 1980 days ago · 88 km deep · 46 km away
  15. 2.237 km ESE of Atka, Alaska · 1980 days ago · 153 km deep · 32 km away
  16. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1981 days ago · 192 km deep · 69 km away
  17. 2.220 km E of Atka, Alaska · 1981 days ago · 115 km deep · 43 km away
  18. 1.683 km SW of Atka, Alaska · 1982 days ago · 26 km deep · 91 km away
  19. 2.228 km SE of Atka, Alaska · 1984 days ago · 70 km deep · 18 km away
  20. 2.933 km S of Atka, Alaska · 1984 days ago · 3 km deep · 25 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e121. Read Thu, Sep 24, 2026, 10:08 AM UTC.