Alaska earthquakes

M3.5 earthquake 81 km SSW of Unalaska, Alaska

A magnitude 3.5 earthquake struck 81 km SSW of Unalaska, Alaska on Mon, Dec 18, 2023, 7:01 AM AKST (16:01 UTC), 29 km (18 mi) below the surface.

A larger quake followed: M3.9 135 km ESE of Nikolski, Alaska. This one was a foreshock.

Unalaska forecastMore in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
3.5 (ml), minor
Local time
UTC
2023-12-18 16:01:09 UTC
Depth
28.8 km (17.9 mi), shallow
Epicenter
53.171° N, 166.879° 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 2.7 km horizontally, 14.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
209°, poorly surrounded by stations
Stations used
18

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 102 in the 60 days after this one and 87 in the 30 days before it.

After

  1. 1.844 km SSE of Unalaska, Alaska · 1014 days ago · 43 km deep · 57 km away
  2. 1.957 km ESE of Unalaska, Alaska · 1014 days ago · 58 km deep · 86 km away
  3. 1.917 km WSW of Dutch Harbor, Alaska · 1013 days ago · 6 km deep · 77 km away
  4. 2.574 km SE of Unalaska, Alaska · 1013 days ago · 35 km deep · 81 km away
  5. 3.2105 km SE of Unalaska, Alaska · 1011 days ago · 35 km deep · 92 km away
  6. 2.152 km NE of Nikolski, Alaska · 1009 days ago · 79 km deep · 92 km away
  7. 1.940 km S of Akutan, Alaska · 1009 days ago · 30 km deep · 99 km away
  8. 2.278 km SSW of Unalaska, Alaska · 1009 days ago · 46 km deep · 3 km away
  9. 2.045 km S of Akutan, Alaska · 1008 days ago · 35 km deep · 95 km away
  10. 2.065 km SW of Unalaska, Alaska · 1008 days ago · 76 km deep · 50 km away
  11. 2.733 km SSE of Unalaska, Alaska · 1008 days ago · 73 km deep · 60 km away
  12. 1.990 km ESE of Nikolski, Alaska · 1008 days ago · 40 km deep · 66 km away
  13. 1.877 km SSW of Unalaska, Alaska · 1007 days ago · 55 km deep · 8 km away
  14. 1.820 km ESE of Unalaska, Alaska · 1006 days ago · 92 km deep · 85 km away
  15. 1.673 km S of Unalaska, Alaska · 1006 days ago · 41 km deep · 14 km away
  16. 3.568 km ENE of Nikolski, Alaska · 1005 days ago · 74 km deep · 67 km away
  17. 3.362 km SSE of Unalaska, Alaska · 1005 days ago · 35 km deep · 54 km away
  18. 2.357 km SSE of Akutan, Alaska · 1004 days ago · 64 km deep · 100 km away
  19. 2.3139 km ESE of Nikolski, Alaska · 1003 days ago · 26 km deep · 79 km away
  20. 2.0142 km ESE of Nikolski, Alaska · 1003 days ago · 18 km deep · 68 km away
  21. 2.0134 km ESE of Nikolski, Alaska · 1002 days ago · 1 km deep · 61 km away
  22. 2.567 km S of Unalaska, Alaska · 1002 days ago · 35 km deep · 16 km away
  23. 3.581 km SSW of Unalaska, Alaska · 1000 days ago · 35 km deep · 1 km away
  24. 1.932 km SSE of Unalaska, Alaska · 999 days ago · 50 km deep · 63 km away
  25. 3.676 km ENE of Nikolski, Alaska · 999 days ago · 67 km deep · 59 km away
  26. 2.080 km SSW of Unalaska, Alaska · 997 days ago · 21 km deep · 5 km away
  27. 2.181 km SSW of Unalaska, Alaska · 997 days ago · 21 km deep · 3 km away
  28. 3.183 km SSW of Unalaska, Alaska · 995 days ago · 33 km deep · 4 km away
  29. 2.382 km SE of Unalaska, Alaska · 995 days ago · 20 km deep · 86 km away
  30. 1.958 km SSW of Unalaska, Alaska · 994 days ago · 43 km deep · 24 km away
  31. 1.985 km S of Unalaska, Alaska · 993 days ago · 14 km deep · 11 km away
  32. 2.055 km SW of Unalaska, Alaska · 992 days ago · 14 km deep · 47 km away
  33. 2.889 km S of Unalaska, Alaska · 991 days ago · 28 km deep · 13 km away
  34. 3.0141 km ESE of Nikolski, Alaska · 990 days ago · 10 km deep · 84 km away
  35. 3.8141 km ESE of Nikolski, Alaska · 989 days ago · 10 km deep · 84 km away
  36. 3.9135 km ESE of Nikolski, Alaska · 989 days ago · 10 km deep · 70 km away
  37. 2.078 km SE of Unalaska, Alaska · 988 days ago · 26 km deep · 78 km away
  38. 1.866 km S of Unalaska, Alaska · 988 days ago · 23 km deep · 30 km away
  39. 1.835 km S of Unalaska, Alaska · 988 days ago · 62 km deep · 51 km away
  40. 1.912 km SSW of Unalaska, Alaska · 988 days ago · 90 km deep · 69 km away
  41. 2.910 km WNW of Dutch Harbor, Alaska · 987 days ago · 118 km deep · 83 km away
  42. 3.689 km SE of Unalaska, Alaska · 986 days ago · 48 km deep · 75 km away
  43. 1.980 km S of Unalaska, Alaska · 985 days ago · 26 km deep · 10 km away
  44. 1.955 km SSE of Unalaska, Alaska · 984 days ago · 50 km deep · 42 km away
  45. 2.5146 km ESE of Nikolski, Alaska · 984 days ago · 10 km deep · 74 km away
  46. 1.746 km SSE of Unalaska, Alaska · 984 days ago · 48 km deep · 62 km away
  47. 3.172 km SE of Unalaska, Alaska · 983 days ago · 35 km deep · 83 km away
  48. 1.982 km SSW of Unalaska, Alaska · 983 days ago · 16 km deep · 4 km away
  49. 2.075 km SW of Unalaska, Alaska · 982 days ago · 13 km deep · 38 km away
  50. 2.261 km E of Nikolski, Alaska · 982 days ago · 79 km deep · 73 km away
  51. 2.424 km S of Unalaska, Alaska · 981 days ago · 79 km deep · 58 km away
  52. 1.643 km SW of Unalaska, Alaska · 980 days ago · 14 km deep · 54 km away
  53. 2.691 km SSW of Unalaska, Alaska · 980 days ago · 35 km deep · 21 km away
  54. 2.835 km ESE of Unalaska, Alaska · 980 days ago · 72 km deep · 87 km away
  55. 2.114 km W of Dutch Harbor, Alaska · 979 days ago · 7 km deep · 77 km away
  56. 2.3159 km ESE of Nikolski, Alaska · 979 days ago · 25 km deep · 97 km away
  57. 2.150 km ESE of Nikolski, Alaska · 979 days ago · 53 km deep · 92 km away
  58. 2.347 km ESE of Nikolski, Alaska · 979 days ago · 44 km deep · 97 km away
  59. 1.852 km SSW of Unalaska, Alaska · 978 days ago · 75 km deep · 35 km away
  60. 2.0100 km SE of Nikolski, Alaska · 978 days ago · 8 km deep · 96 km away

The first 60 of 102.

Before

  1. 1.918 km E of Unalaska, Alaska · 1016 days ago · 78 km deep · 89 km away
  2. 1.963 km SW of Unalaska, Alaska · 1016 days ago · 98 km deep · 41 km away
  3. 1.797 km E of Nikolski, Alaska · 1016 days ago · 38 km deep · 45 km away
  4. 3.6135 km ESE of Nikolski, Alaska · 1016 days ago · 10 km deep · 61 km away
  5. 2.8135 km ESE of Nikolski, Alaska · 1016 days ago · 10 km deep · 62 km away
  6. 1.943 km SSE of Unalaska, Alaska · 1016 days ago · 48 km deep · 60 km away
  7. 1.769 km WSW of Unalaska, Alaska · 1016 days ago · 13 km deep · 55 km away
  8. 2.094 km SSW of Unalaska, Alaska · 1017 days ago · 26 km deep · 14 km away
  9. 2.6134 km ESE of Nikolski, Alaska · 1018 days ago · 10 km deep · 81 km away
  10. 2.1115 km ESE of Nikolski, Alaska · 1019 days ago · 13 km deep · 60 km away
  11. 2.687 km SE of Unalaska, Alaska · 1021 days ago · 26 km deep · 79 km away
  12. 2.068 km SSE of Unalaska, Alaska · 1023 days ago · 16 km deep · 41 km away
  13. 3.492 km E of Nikolski, Alaska · 1024 days ago · 35 km deep · 53 km away
  14. 2.024 km ESE of Unalaska, Alaska · 1024 days ago · 81 km deep · 85 km away
  15. 1.762 km SE of Unalaska, Alaska · 1024 days ago · 41 km deep · 75 km away
  16. 2.771 km S of Unalaska, Alaska · 1025 days ago · 35 km deep · 25 km away
  17. 1.851 km S of Unalaska, Alaska · 1025 days ago · 55 km deep · 39 km away
  18. 1.855 km SSW of Unalaska, Alaska · 1025 days ago · 47 km deep · 32 km away
  19. 2.272 km E of Nikolski, Alaska · 1026 days ago · 44 km deep · 67 km away
  20. 2.667 km SE of Unalaska, Alaska · 1027 days ago · 35 km deep · 79 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000m1ib (also filed as ak023g6epbss). Read Tue, Sep 29, 2026, 4:18 AM UTC.