Alaska earthquakes

M1.8 earthquake 144 km S of Unalaska, Alaska

A magnitude 1.8 earthquake struck 144 km S of Unalaska, Alaska on Mon, Sep 6, 2021, 7:37 AM AKDT (15:37 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M5.2 69 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.

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The earthquake

Magnitude
1.8 (ml), micro
Local time
UTC
2021-09-06 15:37:14 UTC
Depth
25.5 km (15.8 mi), shallow
Epicenter
52.574° N, 166.542° 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
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 47 in the 60 days after this one and 30 in the 30 days before it.

After

  1. 1.7143 km S of Unalaska, Alaska · 1849 days ago · 21 km deep · 5 km away
  2. 1.6124 km S of Unalaska, Alaska · 1849 days ago · 2 km deep · 26 km away
  3. 1.8102 km E of Nikolski, Alaska · 1845 days ago · 25 km deep · 65 km away
  4. 1.981 km SSE of Unalaska, Alaska · 1838 days ago · 25 km deep · 79 km away
  5. 2.098 km E of Nikolski, Alaska · 1833 days ago · 26 km deep · 68 km away
  6. 2.684 km S of Unalaska, Alaska · 1832 days ago · 35 km deep · 63 km away
  7. 3.2109 km SSW of Unalaska, Alaska · 1828 days ago · 29 km deep · 44 km away
  8. 3.085 km SSW of Unalaska, Alaska · 1828 days ago · 35 km deep · 64 km away
  9. 1.9107 km E of Nikolski, Alaska · 1826 days ago · 14 km deep · 62 km away
  10. 2.5107 km ESE of Nikolski, Alaska · 1820 days ago · 23 km deep · 64 km away
  11. 2.984 km E of Nikolski, Alaska · 1819 days ago · 35 km deep · 77 km away
  12. 1.781 km SSE of Unalaska, Alaska · 1818 days ago · 26 km deep · 78 km away
  13. 1.8105 km ESE of Nikolski, Alaska · 1818 days ago · 17 km deep · 60 km away
  14. 4.177 km SSW of Unalaska, Alaska · 1816 days ago · 44 km deep · 73 km away
  15. 2.088 km S of Unalaska, Alaska · 1814 days ago · 41 km deep · 60 km away
  16. 3.091 km SW of Unalaska, Alaska · 1814 days ago · 35 km deep · 95 km away
  17. 2.2161 km SSE of Unalaska, Alaska · 1812 days ago · 9 km deep · 89 km away
  18. 3.782 km E of Nikolski, Alaska · 1812 days ago · 42 km deep · 80 km away
  19. 1.8103 km ESE of Nikolski, Alaska · 1811 days ago · 26 km deep · 58 km away
  20. 2.882 km S of Unalaska, Alaska · 1811 days ago · 34 km deep · 65 km away
  21. 3.887 km SSW of Unalaska, Alaska · 1811 days ago · 35 km deep · 65 km away
  22. 2.890 km S of Unalaska, Alaska · 1810 days ago · 35 km deep · 58 km away
  23. 1.787 km SSW of Unalaska, Alaska · 1804 days ago · 26 km deep · 68 km away
  24. 3.0138 km SE of Unalaska, Alaska · 1802 days ago · 8 km deep · 87 km away
  25. 3.199 km E of Nikolski, Alaska · 1801 days ago · 35 km deep · 63 km away
  26. 3.0102 km E of Nikolski, Alaska · 1801 days ago · 35 km deep · 61 km away
  27. 2.9102 km E of Nikolski, Alaska · 1801 days ago · 35 km deep · 61 km away
  28. 2.590 km S of Unalaska, Alaska · 1797 days ago · 29 km deep · 54 km away
  29. 1.9Fox Islands, Aleutian Islands, Alaska · 1796 days ago · 21 km deep · 72 km away
  30. 4.477 km S of Unalaska, Alaska · 1796 days ago · 10 km deep · 69 km away
  31. 3.172 km SSW of Unalaska, Alaska · 1796 days ago · 35 km deep · 76 km away
  32. 3.470 km SSW of Unalaska, Alaska · 1796 days ago · 30 km deep · 78 km away
  33. 2.074 km SSW of Unalaska, Alaska · 1796 days ago · 26 km deep · 74 km away
  34. 1.8109 km SE of Unalaska, Alaska · 1794 days ago · 15 km deep · 83 km away
  35. 3.676 km S of Unalaska, Alaska · 1794 days ago · 35 km deep · 69 km away
  36. 1.890 km E of Nikolski, Alaska · 1794 days ago · 51 km deep · 78 km away
  37. 1.7108 km S of Unalaska, Alaska · 1794 days ago · 13 km deep · 37 km away
  38. 1.786 km SSW of Unalaska, Alaska · 1794 days ago · 26 km deep · 83 km away
  39. 2.077 km S of Unalaska, Alaska · 1794 days ago · 26 km deep · 70 km away
  40. 2.0127 km S of Unalaska, Alaska · 1793 days ago · 6 km deep · 20 km away
  41. 1.694 km SE of Unalaska, Alaska · 1793 days ago · 22 km deep · 90 km away
  42. 1.774 km SSW of Unalaska, Alaska · 1792 days ago · 42 km deep · 74 km away
  43. 1.964 km SSE of Unalaska, Alaska · 1792 days ago · 35 km deep · 84 km away
  44. 2.2114 km SSE of Unalaska, Alaska · 1791 days ago · 21 km deep · 80 km away
  45. 5.269 km ESE of Nikolski, Alaska · 1790 days ago · 39 km deep · 94 km away · felt by 5 · tsunami flag
  46. 2.181 km ESE of Nikolski, Alaska · 1790 days ago · 25 km deep · 82 km away
  47. 2.759 km SSW of Unalaska, Alaska · 1790 days ago · 29 km deep · 95 km away

Before

  1. 2.184 km S of Unalaska, Alaska · 1849 days ago · 26 km deep · 64 km away
  2. 3.6127 km S of Unalaska, Alaska · 1849 days ago · 7 km deep · 23 km away
  3. 2.863 km SSW of Unalaska, Alaska · 1851 days ago · 67 km deep · 91 km away
  4. 1.570 km SW of Unalaska, Alaska · 1852 days ago · 31 km deep · 99 km away
  5. 2.9103 km ESE of Nikolski, Alaska · 1853 days ago · 25 km deep · 59 km away
  6. 1.9136 km ESE of Nikolski, Alaska · 1853 days ago · 7 km deep · 25 km away
  7. 1.9140 km ESE of Nikolski, Alaska · 1854 days ago · 14 km deep · 25 km away
  8. 2.674 km SSW of Unalaska, Alaska · 1855 days ago · 55 km deep · 75 km away
  9. 1.688 km SSW of Unalaska, Alaska · 1855 days ago · 24 km deep · 71 km away
  10. 1.984 km E of Nikolski, Alaska · 1855 days ago · 53 km deep · 82 km away
  11. 2.5105 km SE of Unalaska, Alaska · 1856 days ago · 35 km deep · 89 km away
  12. 2.0152 km ESE of Nikolski, Alaska · 1856 days ago · 15 km deep · 16 km away
  13. 1.8135 km ESE of Nikolski, Alaska · 1856 days ago · 25 km deep · 36 km away
  14. 1.789 km E of Nikolski, Alaska · 1857 days ago · 25 km deep · 74 km away
  15. 2.8185 km SSE of Unalaska, Alaska · 1862 days ago · 10 km deep · 54 km away
  16. 2.661 km SSE of Unalaska, Alaska · 1863 days ago · 35 km deep · 96 km away
  17. 1.768 km E of Nikolski, Alaska · 1865 days ago · 30 km deep · 95 km away
  18. 1.8151 km ESE of Nikolski, Alaska · 1866 days ago · 18 km deep · 16 km away
  19. 1.595 km E of Nikolski, Alaska · 1868 days ago · 49 km deep · 71 km away
  20. 4.670 km E of Nikolski, Alaska · 1869 days ago · 43 km deep · 95 km away · felt by 1

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bg1ywmx. Read Tue, Sep 29, 2026, 11:58 AM UTC.