Alaska earthquakes

M3.3 earthquake 145 km SSW of Adak, Alaska

A magnitude 3.3 earthquake struck 145 km SSW of Adak, Alaska on Sun, Dec 31, 2023, 9:30 PM HAST (07:30 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.0 104 km SSW of Adak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.3 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2024-01-01 07:30:07 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.596° N, 177.062° 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
3.3ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.081 · 20 stations
3.3ML, 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 5.8 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
230°, poorly surrounded by stations
Stations used
36

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 27 in the 30 days before it.

After

  1. 2.2137 km SSW of Adak, Alaska · 1003 days ago · 25 km deep · 50 km away
  2. 2.8135 km SSW of Adak, Alaska · 1003 days ago · 28 km deep · 49 km away
  3. 3.079 km SW of Adak, Alaska · 1003 days ago · 32 km deep · 95 km away
  4. 3.651 km SSW of Adak, Alaska · 991 days ago · 35 km deep · 94 km away
  5. 2.995 km SW of Adak, Alaska · 977 days ago · 35 km deep · 99 km away
  6. 4.0103 km SW of Adak, Alaska · 976 days ago · 53 km deep · 98 km away
  7. 2.673 km SW of Adak, Alaska · 975 days ago · 35 km deep · 87 km away
  8. 1.653 km SSE of Adak, Alaska · 974 days ago · 19 km deep · 99 km away
  9. 1.9123 km SW of Adak, Alaska · 974 days ago · 24 km deep · 93 km away
  10. 1.879 km SW of Adak, Alaska · 974 days ago · 31 km deep · 87 km away
  11. 1.846 km SSW of Adak, Alaska · 973 days ago · 40 km deep · 99 km away
  12. 1.962 km SSE of Adak, Alaska · 972 days ago · 3 km deep · 92 km away
  13. 2.283 km SW of Adak, Alaska · 970 days ago · 38 km deep · 85 km away
  14. 1.963 km SSW of Adak, Alaska · 970 days ago · 36 km deep · 85 km away
  15. 2.1104 km SW of Adak, Alaska · 969 days ago · 24 km deep · 89 km away
  16. 2.969 km SSW of Adak, Alaska · 968 days ago · 35 km deep · 78 km away
  17. 3.166 km SSW of Adak, Alaska · 967 days ago · 35 km deep · 82 km away
  18. 1.963 km SSW of Adak, Alaska · 965 days ago · 37 km deep · 84 km away
  19. 1.966 km SSW of Adak, Alaska · 965 days ago · 32 km deep · 81 km away
  20. 1.769 km SSW of Adak, Alaska · 964 days ago · 33 km deep · 80 km away
  21. 2.070 km SSE of Adak, Alaska · 963 days ago · 19 km deep · 92 km away
  22. 1.9118 km SW of Adak, Alaska · 961 days ago · 16 km deep · 90 km away
  23. 2.7106 km SSW of Adak, Alaska · 960 days ago · 27 km deep · 61 km away
  24. 1.557 km SW of Adak, Alaska · 960 days ago · 52 km deep · 97 km away
  25. 2.578 km SW of Adak, Alaska · 959 days ago · 35 km deep · 91 km away
  26. 1.553 km S of Adak, Alaska · 959 days ago · 17 km deep · 96 km away
  27. 1.761 km SSW of Adak, Alaska · 959 days ago · 39 km deep · 86 km away
  28. 2.653 km SSE of Adak, Alaska · 955 days ago · 35 km deep · 98 km away
  29. 2.669 km SSW of Adak, Alaska · 955 days ago · 45 km deep · 79 km away
  30. 2.0113 km SW of Adak, Alaska · 953 days ago · 16 km deep · 95 km away
  31. 2.065 km SSW of Adak, Alaska · 951 days ago · 33 km deep · 82 km away
  32. 2.078 km SSE of Adak, Alaska · 951 days ago · 25 km deep · 80 km away
  33. 2.174 km SW of Adak, Alaska · 949 days ago · 35 km deep · 99 km away
  34. 2.5158 km SW of Adak, Alaska · 945 days ago · 10 km deep · 77 km away
  35. 5.0104 km SSW of Adak, Alaska · 945 days ago · 27 km deep · 53 km away
  36. 2.698 km SW of Adak, Alaska · 944 days ago · 35 km deep · 88 km away
  37. 1.957 km S of Adak, Alaska · 944 days ago · 21 km deep · 93 km away

Before

  1. 2.052 km S of Adak, Alaska · 1005 days ago · 31 km deep · 95 km away
  2. 2.690 km SW of Adak, Alaska · 1007 days ago · 35 km deep · 86 km away
  3. 2.193 km SW of Adak, Alaska · 1007 days ago · 31 km deep · 90 km away
  4. 2.064 km SSW of Adak, Alaska · 1008 days ago · 46 km deep · 86 km away
  5. 3.072 km SSW of Adak, Alaska · 1011 days ago · 35 km deep · 76 km away
  6. 1.9132 km SW of Adak, Alaska · 1011 days ago · 21 km deep · 97 km away
  7. 2.278 km S of Adak, Alaska · 1013 days ago · 19 km deep · 73 km away
  8. 2.294 km S of Adak, Alaska · 1013 days ago · 16 km deep · 57 km away
  9. 4.7134 km SW of Adak, Alaska · 1016 days ago · 24 km deep · 88 km away
  10. 2.577 km SSW of Adak, Alaska · 1017 days ago · 35 km deep · 71 km away
  11. 2.166 km SSE of Adak, Alaska · 1018 days ago · 19 km deep · 90 km away
  12. 2.155 km SSW of Adak, Alaska · 1018 days ago · 23 km deep · 91 km away
  13. 2.670 km SSW of Adak, Alaska · 1019 days ago · 35 km deep · 76 km away
  14. 1.968 km SW of Adak, Alaska · 1019 days ago · 47 km deep · 98 km away
  15. 2.290 km SW of Adak, Alaska · 1019 days ago · 39 km deep · 90 km away
  16. 2.0114 km SW of Adak, Alaska · 1020 days ago · 25 km deep · 95 km away
  17. 2.6136 km SW of Adak, Alaska · 1022 days ago · 10 km deep · 74 km away
  18. 3.882 km SSW of Adak, Alaska · 1025 days ago · 35 km deep · 69 km away
  19. 2.183 km S of Adak, Alaska · 1025 days ago · 0 km deep · 72 km away
  20. 2.059 km S of Adak, Alaska · 1025 days ago · 13 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000m56i (also filed as ak0241rvu7u). Read Thu, Oct 1, 2026, 6:25 AM UTC.