Alaska earthquakes

M1.7 earthquake 143 km S of Unalaska, Alaska

A magnitude 1.7 earthquake struck 143 km S of Unalaska, Alaska on Mon, Sep 6, 2021, 7:39 AM AKDT (15:39 UTC), 21 km (13 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
1.7 (ml), micro
Local time
UTC
2021-09-06 15:39:45 UTC
Depth
21.2 km (13.2 mi), shallow
Epicenter
52.589° N, 166.606° 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
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 50 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 1.6124 km S of Unalaska, Alaska · 1844 days ago · 2 km deep · 22 km away
  2. 1.8102 km E of Nikolski, Alaska · 1840 days ago · 25 km deep · 61 km away
  3. 2.380 km SE of Nikolski, Alaska · 1833 days ago · 25 km deep · 97 km away
  4. 1.981 km SSE of Unalaska, Alaska · 1833 days ago · 25 km deep · 80 km away
  5. 2.098 km E of Nikolski, Alaska · 1828 days ago · 26 km deep · 63 km away
  6. 2.684 km S of Unalaska, Alaska · 1827 days ago · 35 km deep · 61 km away
  7. 3.2109 km SSW of Unalaska, Alaska · 1823 days ago · 29 km deep · 40 km away
  8. 3.085 km SSW of Unalaska, Alaska · 1823 days ago · 35 km deep · 61 km away
  9. 1.9107 km E of Nikolski, Alaska · 1821 days ago · 14 km deep · 58 km away
  10. 2.191 km SE of Nikolski, Alaska · 1817 days ago · 26 km deep · 99 km away
  11. 2.054 km SSW of Unalaska, Alaska · 1816 days ago · 71 km deep · 98 km away
  12. 2.5107 km ESE of Nikolski, Alaska · 1816 days ago · 23 km deep · 60 km away
  13. 2.984 km E of Nikolski, Alaska · 1814 days ago · 35 km deep · 73 km away
  14. 1.781 km SSE of Unalaska, Alaska · 1813 days ago · 26 km deep · 78 km away
  15. 1.8105 km ESE of Nikolski, Alaska · 1813 days ago · 17 km deep · 55 km away
  16. 4.177 km SSW of Unalaska, Alaska · 1811 days ago · 44 km deep · 71 km away
  17. 2.088 km S of Unalaska, Alaska · 1809 days ago · 41 km deep · 57 km away
  18. 3.091 km SW of Unalaska, Alaska · 1809 days ago · 35 km deep · 91 km away
  19. 2.2161 km SSE of Unalaska, Alaska · 1807 days ago · 9 km deep · 93 km away
  20. 3.782 km E of Nikolski, Alaska · 1807 days ago · 42 km deep · 76 km away
  21. 1.8103 km ESE of Nikolski, Alaska · 1807 days ago · 26 km deep · 54 km away
  22. 2.882 km S of Unalaska, Alaska · 1806 days ago · 34 km deep · 62 km away
  23. 3.887 km SSW of Unalaska, Alaska · 1806 days ago · 35 km deep · 62 km away
  24. 2.890 km S of Unalaska, Alaska · 1805 days ago · 35 km deep · 55 km away
  25. 1.787 km SSW of Unalaska, Alaska · 1800 days ago · 26 km deep · 65 km away
  26. 3.0138 km SE of Unalaska, Alaska · 1797 days ago · 8 km deep · 91 km away
  27. 3.199 km E of Nikolski, Alaska · 1797 days ago · 35 km deep · 59 km away
  28. 3.0102 km E of Nikolski, Alaska · 1797 days ago · 35 km deep · 57 km away
  29. 2.9102 km E of Nikolski, Alaska · 1797 days ago · 35 km deep · 56 km away
  30. 2.590 km S of Unalaska, Alaska · 1792 days ago · 29 km deep · 52 km away
  31. 1.9Fox Islands, Aleutian Islands, Alaska · 1791 days ago · 21 km deep · 69 km away
  32. 4.477 km S of Unalaska, Alaska · 1791 days ago · 10 km deep · 66 km away
  33. 3.172 km SSW of Unalaska, Alaska · 1791 days ago · 35 km deep · 74 km away
  34. 3.470 km SSW of Unalaska, Alaska · 1791 days ago · 30 km deep · 75 km away
  35. 2.074 km SSW of Unalaska, Alaska · 1791 days ago · 26 km deep · 71 km away
  36. 1.8109 km SE of Unalaska, Alaska · 1789 days ago · 15 km deep · 85 km away
  37. 3.676 km S of Unalaska, Alaska · 1789 days ago · 35 km deep · 67 km away
  38. 1.890 km E of Nikolski, Alaska · 1789 days ago · 51 km deep · 73 km away
  39. 1.7108 km S of Unalaska, Alaska · 1789 days ago · 13 km deep · 35 km away
  40. 1.786 km SSW of Unalaska, Alaska · 1789 days ago · 26 km deep · 80 km away
  41. 2.077 km S of Unalaska, Alaska · 1789 days ago · 26 km deep · 67 km away
  42. 2.0127 km S of Unalaska, Alaska · 1789 days ago · 6 km deep · 17 km away
  43. 1.694 km SE of Unalaska, Alaska · 1788 days ago · 22 km deep · 91 km away
  44. 2.686 km ENE of Nikolski, Alaska · 1788 days ago · 64 km deep · 96 km away
  45. 1.774 km SSW of Unalaska, Alaska · 1787 days ago · 42 km deep · 71 km away
  46. 1.964 km SSE of Unalaska, Alaska · 1787 days ago · 35 km deep · 83 km away
  47. 2.2114 km SSE of Unalaska, Alaska · 1786 days ago · 21 km deep · 83 km away
  48. 5.269 km ESE of Nikolski, Alaska · 1785 days ago · 39 km deep · 90 km away · felt by 5 · tsunami flag
  49. 2.181 km ESE of Nikolski, Alaska · 1785 days ago · 25 km deep · 78 km away
  50. 2.759 km SSW of Unalaska, Alaska · 1785 days ago · 29 km deep · 92 km away

Before

  1. 1.8144 km S of Unalaska, Alaska · 1844 days ago · 26 km deep · 5 km away
  2. 2.184 km S of Unalaska, Alaska · 1844 days ago · 26 km deep · 62 km away
  3. 3.6127 km S of Unalaska, Alaska · 1844 days ago · 7 km deep · 19 km away
  4. 2.863 km SSW of Unalaska, Alaska · 1846 days ago · 67 km deep · 89 km away
  5. 1.570 km SW of Unalaska, Alaska · 1847 days ago · 31 km deep · 96 km away
  6. 2.9103 km ESE of Nikolski, Alaska · 1848 days ago · 25 km deep · 54 km away
  7. 1.9136 km ESE of Nikolski, Alaska · 1849 days ago · 7 km deep · 21 km away
  8. 1.9140 km ESE of Nikolski, Alaska · 1849 days ago · 14 km deep · 21 km away
  9. 2.674 km SSW of Unalaska, Alaska · 1850 days ago · 55 km deep · 72 km away
  10. 1.688 km SSW of Unalaska, Alaska · 1850 days ago · 24 km deep · 68 km away
  11. 1.984 km E of Nikolski, Alaska · 1851 days ago · 53 km deep · 77 km away
  12. 2.5105 km SE of Unalaska, Alaska · 1851 days ago · 35 km deep · 91 km away
  13. 2.0152 km ESE of Nikolski, Alaska · 1851 days ago · 15 km deep · 14 km away
  14. 1.8135 km ESE of Nikolski, Alaska · 1852 days ago · 25 km deep · 33 km away
  15. 1.789 km E of Nikolski, Alaska · 1852 days ago · 25 km deep · 69 km away
  16. 1.757 km ESE of Nikolski, Alaska · 1856 days ago · 26 km deep · 99 km away
  17. 2.8185 km SSE of Unalaska, Alaska · 1857 days ago · 10 km deep · 58 km away
  18. 2.661 km SSE of Unalaska, Alaska · 1859 days ago · 35 km deep · 96 km away
  19. 1.768 km E of Nikolski, Alaska · 1860 days ago · 30 km deep · 91 km away
  20. 1.8151 km ESE of Nikolski, Alaska · 1861 days ago · 18 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bg1zdfs. Read Thu, Sep 24, 2026, 3:44 PM UTC.