Alaska earthquakes

M1.6 earthquake 17 km SSW of Unalaska, Alaska

A magnitude 1.6 earthquake struck 17 km SSW of Unalaska, Alaska on Sat, Aug 21, 2021, 12:26 AM AKDT (08:26 UTC), 77 km (48 mi) below the surface.

A larger quake followed: M1.8 61 km SSE of Akutan, 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
1.6 (ml), micro
Local time
UTC
2021-08-21 08:26:23 UTC
Depth
77.0 km (47.8 mi), intermediate-depth
Epicenter
53.719° N, 166.600° 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
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 77 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 1.629 km SSE of Akutan, Alaska · 1859 days ago · 64 km deep · 64 km away
  2. 1.861 km SSE of Akutan, Alaska · 1858 days ago · 63 km deep · 76 km away
  3. 1.954 km SW of Unalaska, Alaska · 1857 days ago · 13 km deep · 42 km away
  4. 2.661 km SSE of Unalaska, Alaska · 1857 days ago · 35 km deep · 50 km away
  5. 1.5Fox Islands, Aleutian Islands, Alaska · 1856 days ago · 62 km deep · 90 km away
  6. 1.767 km SE of Unalaska, Alaska · 1855 days ago · 26 km deep · 61 km away
  7. 1.518 km S of Akutan, Alaska · 1852 days ago · 79 km deep · 60 km away
  8. 1.628 km WSW of Unalaska, Alaska · 1852 days ago · 111 km deep · 20 km away
  9. 2.753 km SSE of Akutan, Alaska · 1852 days ago · 39 km deep · 80 km away
  10. 2.066 km SW of Unalaska, Alaska · 1851 days ago · 14 km deep · 53 km away
  11. 2.144 km SE of Akutan, Alaska · 1851 days ago · 61 km deep · 86 km away
  12. 2.218 km SSE of Unalaska, Alaska · 1850 days ago · 115 km deep · 14 km away
  13. 2.5105 km SE of Unalaska, Alaska · 1850 days ago · 35 km deep · 95 km away
  14. 1.688 km SSW of Unalaska, Alaska · 1849 days ago · 24 km deep · 71 km away
  15. 2.674 km SSW of Unalaska, Alaska · 1849 days ago · 55 km deep · 57 km away
  16. 1.676 km SSE of Akutan, Alaska · 1848 days ago · 49 km deep · 92 km away
  17. 2.948 km SW of Unalaska, Alaska · 1847 days ago · 96 km deep · 33 km away
  18. 1.570 km SW of Unalaska, Alaska · 1846 days ago · 31 km deep · 54 km away
  19. 1.818 km NE of Akutan, Alaska · 1846 days ago · 79 km deep · 89 km away
  20. 2.863 km SSW of Unalaska, Alaska · 1845 days ago · 67 km deep · 46 km away
  21. 2.184 km S of Unalaska, Alaska · 1843 days ago · 26 km deep · 66 km away
  22. 1.913 km S of Akutan, Alaska · 1843 days ago · 111 km deep · 64 km away
  23. 2.421 km ESE of Akutan, Alaska · 1841 days ago · 81 km deep · 85 km away
  24. 1.645 km ESE of Unalaska, Alaska · 1840 days ago · 63 km deep · 46 km away
  25. 1.552 km SW of Unalaska, Alaska · 1840 days ago · 14 km deep · 40 km away
  26. 1.578 km SW of Unalaska, Alaska · 1840 days ago · 31 km deep · 65 km away
  27. 1.825 km SE of Akutan, Alaska · 1839 days ago · 72 km deep · 77 km away
  28. 2.888 km SSE of Akutan, Alaska · 1839 days ago · 35 km deep · 97 km away
  29. 2.049 km SE of Akutan, Alaska · 1836 days ago · 73 km deep · 94 km away
  30. 1.841 km SE of Akutan, Alaska · 1836 days ago · 60 km deep · 85 km away
  31. 3.638 km SE of Akutan, Alaska · 1836 days ago · 76 km deep · 85 km away
  32. 1.65 km SW of Akutan, Alaska · 1833 days ago · 71 km deep · 65 km away
  33. 1.620 km WSW of Dutch Harbor, Alaska · 1832 days ago · 7 km deep · 22 km away
  34. 1.521 km WSW of Dutch Harbor, Alaska · 1832 days ago · 7 km deep · 22 km away
  35. 1.621 km WSW of Dutch Harbor, Alaska · 1832 days ago · 7 km deep · 22 km away
  36. 1.720 km WSW of Dutch Harbor, Alaska · 1832 days ago · 6 km deep · 22 km away
  37. 1.652 km SE of Unalaska, Alaska · 1832 days ago · 25 km deep · 44 km away
  38. 1.651 km SW of Unalaska, Alaska · 1832 days ago · 15 km deep · 38 km away
  39. 1.981 km SSE of Unalaska, Alaska · 1832 days ago · 25 km deep · 69 km away
  40. 1.875 km SSE of Akutan, Alaska · 1828 days ago · 11 km deep · 87 km away
  41. 1.832 km SE of Akutan, Alaska · 1828 days ago · 65 km deep · 83 km away
  42. 3.457 km SSE of Unalaska, Alaska · 1827 days ago · 43 km deep · 47 km away
  43. 2.684 km S of Unalaska, Alaska · 1826 days ago · 35 km deep · 67 km away
  44. 1.818 km WSW of Dutch Harbor, Alaska · 1825 days ago · 7 km deep · 20 km away
  45. 1.820 km WSW of Dutch Harbor, Alaska · 1825 days ago · 5 km deep · 20 km away
  46. 1.720 km WSW of Dutch Harbor, Alaska · 1825 days ago · 5 km deep · 20 km away
  47. 1.712 km W of Akutan, Alaska · 1825 days ago · 5 km deep · 63 km away
  48. 1.670 km SE of Unalaska, Alaska · 1824 days ago · 25 km deep · 65 km away
  49. 1.6Fox Islands, Aleutian Islands, Alaska · 1823 days ago · 23 km deep · 37 km away
  50. 3.2109 km SSW of Unalaska, Alaska · 1822 days ago · 29 km deep · 92 km away
  51. 2.156 km SW of Unalaska, Alaska · 1822 days ago · 89 km deep · 43 km away
  52. 3.085 km SSW of Unalaska, Alaska · 1821 days ago · 35 km deep · 68 km away
  53. 1.668 km SE of Unalaska, Alaska · 1821 days ago · 23 km deep · 63 km away
  54. 2.160 km SSE of Akutan, Alaska · 1820 days ago · 46 km deep · 86 km away
  55. 1.9107 km E of Nikolski, Alaska · 1819 days ago · 14 km deep · 98 km away
  56. 1.759 km SE of Unalaska, Alaska · 1817 days ago · 13 km deep · 56 km away
  57. 1.9Fox Islands, Aleutian Islands, Alaska · 1817 days ago · 49 km deep · 95 km away
  58. 1.876 km SSE of Akutan, Alaska · 1817 days ago · 22 km deep · 85 km away
  59. 2.054 km SSW of Unalaska, Alaska · 1815 days ago · 71 km deep · 37 km away
  60. 1.566 km SE of Unalaska, Alaska · 1815 days ago · 24 km deep · 57 km away

The first 60 of 77.

Before

  1. 2.721 km S of Akutan, Alaska · 1861 days ago · 87 km deep · 59 km away
  2. 1.5Fox Islands, Aleutian Islands, Alaska · 1863 days ago · 42 km deep · 40 km away
  3. 1.786 km SSW of Unalaska, Alaska · 1865 days ago · 26 km deep · 69 km away
  4. 1.743 km SW of Unalaska, Alaska · 1866 days ago · 8 km deep · 30 km away
  5. 2.615 km ESE of Akutan, Alaska · 1868 days ago · 82 km deep · 80 km away
  6. 1.669 km SE of Unalaska, Alaska · 1869 days ago · 26 km deep · 63 km away
  7. 1.658 km SW of Unalaska, Alaska · 1870 days ago · 74 km deep · 42 km away
  8. 1.582 km SSW of Unalaska, Alaska · 1870 days ago · 25 km deep · 65 km away
  9. 1.642 km SE of Akutan, Alaska · 1871 days ago · 53 km deep · 88 km away
  10. 1.949 km SSE of Unalaska, Alaska · 1872 days ago · 60 km deep · 39 km away
  11. 3.426 km ESE of Unalaska, Alaska · 1873 days ago · 83 km deep · 27 km away
  12. 1.789 km SSW of Unalaska, Alaska · 1875 days ago · 26 km deep · 71 km away
  13. 1.688 km SSW of Unalaska, Alaska · 1875 days ago · 26 km deep · 71 km away
  14. 3.588 km SSW of Unalaska, Alaska · 1875 days ago · 35 km deep · 71 km away
  15. 3.094 km SSW of Unalaska, Alaska · 1875 days ago · 35 km deep · 77 km away
  16. 3.524 km ESE of Unalaska, Alaska · 1875 days ago · 86 km deep · 27 km away
  17. 1.738 km SSE of Akutan, Alaska · 1875 days ago · 62 km deep · 67 km away
  18. 1.673 km SW of Unalaska, Alaska · 1876 days ago · 70 km deep · 59 km away
  19. 2.640 km SSE of Unalaska, Alaska · 1877 days ago · 75 km deep · 27 km away
  20. 3.219 km E of Akutan, Alaska · 1878 days ago · 83 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021aph4ybi. Read Wed, Sep 23, 2026, 5:31 AM UTC.