Alaska earthquakes

M1.5 earthquake 75 km SW of Unalaska, Alaska

A magnitude 1.5 earthquake struck 75 km SW of Unalaska, Alaska on Sat, Jul 31, 2021, 1:40 PM AKDT (21:40 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M2.0 55 km SW of Unalaska, 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
1.5 (ml), micro
Local time
UTC
2021-07-31 21:40:11 UTC
Depth
68.3 km (42.4 mi), shallow
Epicenter
53.398° N, 167.351° 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
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 78 in the 60 days after this one and 46 in the 30 days before it.

After

  1. 2.055 km SW of Unalaska, Alaska · 1879 days ago · 18 km deep · 20 km away
  2. 1.783 km SSW of Unalaska, Alaska · 1879 days ago · 47 km deep · 28 km away
  3. 2.640 km SSE of Unalaska, Alaska · 1877 days ago · 75 km deep · 68 km away
  4. 2.249 km ESE of Nikolski, Alaska · 1877 days ago · 26 km deep · 86 km away
  5. 1.673 km SW of Unalaska, Alaska · 1876 days ago · 70 km deep · 3 km away
  6. 3.524 km ESE of Unalaska, Alaska · 1876 days ago · 86 km deep · 87 km away
  7. 3.094 km SSW of Unalaska, Alaska · 1875 days ago · 35 km deep · 49 km away
  8. 3.588 km SSW of Unalaska, Alaska · 1875 days ago · 35 km deep · 40 km away
  9. 1.688 km SSW of Unalaska, Alaska · 1875 days ago · 26 km deep · 40 km away
  10. 1.789 km SSW of Unalaska, Alaska · 1875 days ago · 26 km deep · 44 km away
  11. 3.426 km ESE of Unalaska, Alaska · 1874 days ago · 83 km deep · 87 km away
  12. 2.0100 km E of Nikolski, Alaska · 1873 days ago · 26 km deep · 59 km away
  13. 1.949 km SSE of Unalaska, Alaska · 1873 days ago · 60 km deep · 79 km away
  14. 2.0137 km S of Unalaska, Alaska · 1871 days ago · 9 km deep · 91 km away
  15. 1.792 km E of Nikolski, Alaska · 1871 days ago · 26 km deep · 48 km away
  16. 1.582 km SSW of Unalaska, Alaska · 1871 days ago · 25 km deep · 37 km away
  17. 1.658 km SW of Unalaska, Alaska · 1870 days ago · 74 km deep · 22 km away
  18. 1.5141 km S of Unalaska, Alaska · 1869 days ago · 13 km deep · 95 km away
  19. 1.585 km ESE of Nikolski, Alaska · 1868 days ago · 26 km deep · 74 km away
  20. 1.743 km SW of Unalaska, Alaska · 1866 days ago · 8 km deep · 32 km away
  21. 1.786 km SSW of Unalaska, Alaska · 1866 days ago · 26 km deep · 47 km away
  22. 1.633 km ESE of Nikolski, Alaska · 1865 days ago · 29 km deep · 92 km away
  23. 1.962 km E of Nikolski, Alaska · 1863 days ago · 67 km deep · 64 km away
  24. 1.5Fox Islands, Aleutian Islands, Alaska · 1863 days ago · 42 km deep · 74 km away
  25. 4.086 km E of Nikolski, Alaska · 1863 days ago · 35 km deep · 64 km away
  26. 4.670 km E of Nikolski, Alaska · 1863 days ago · 43 km deep · 59 km away · felt by 1
  27. 1.595 km E of Nikolski, Alaska · 1862 days ago · 49 km deep · 54 km away
  28. 1.617 km SSW of Unalaska, Alaska · 1859 days ago · 77 km deep · 61 km away
  29. 1.768 km E of Nikolski, Alaska · 1859 days ago · 30 km deep · 64 km away
  30. 1.954 km SW of Unalaska, Alaska · 1858 days ago · 13 km deep · 23 km away
  31. 2.661 km SSE of Unalaska, Alaska · 1858 days ago · 35 km deep · 84 km away
  32. 2.756 km SE of Nikolski, Alaska · 1856 days ago · 35 km deep · 100 km away
  33. 1.840 km ESE of Nikolski, Alaska · 1856 days ago · 48 km deep · 92 km away
  34. 1.529 km E of Nikolski, Alaska · 1855 days ago · 53 km deep · 89 km away
  35. 1.757 km ESE of Nikolski, Alaska · 1855 days ago · 26 km deep · 80 km away
  36. 1.628 km WSW of Unalaska, Alaska · 1852 days ago · 111 km deep · 48 km away
  37. 1.857 km ESE of Nikolski, Alaska · 1852 days ago · 37 km deep · 96 km away
  38. 2.066 km SW of Unalaska, Alaska · 1852 days ago · 14 km deep · 11 km away
  39. 4.041 km ESE of Nikolski, Alaska · 1851 days ago · 53 km deep · 88 km away
  40. 1.789 km E of Nikolski, Alaska · 1851 days ago · 25 km deep · 64 km away
  41. 2.218 km SSE of Unalaska, Alaska · 1850 days ago · 115 km deep · 74 km away
  42. 1.984 km E of Nikolski, Alaska · 1850 days ago · 53 km deep · 55 km away
  43. 1.688 km SSW of Unalaska, Alaska · 1849 days ago · 24 km deep · 35 km away
  44. 2.674 km SSW of Unalaska, Alaska · 1849 days ago · 55 km deep · 40 km away
  45. 1.9136 km ESE of Nikolski, Alaska · 1848 days ago · 7 km deep · 90 km away
  46. 2.948 km SW of Unalaska, Alaska · 1847 days ago · 96 km deep · 29 km away
  47. 3.174 km NNE of Nikolski, Alaska · 1847 days ago · 133 km deep · 77 km away
  48. 2.9103 km ESE of Nikolski, Alaska · 1847 days ago · 25 km deep · 72 km away
  49. 1.570 km SW of Unalaska, Alaska · 1846 days ago · 31 km deep · 12 km away
  50. 2.863 km SSW of Unalaska, Alaska · 1845 days ago · 67 km deep · 28 km away
  51. 2.115 km NNE of Nikolski, Alaska · 1845 days ago · 100 km deep · 100 km away
  52. 3.6127 km S of Unalaska, Alaska · 1843 days ago · 7 km deep · 84 km away
  53. 2.184 km S of Unalaska, Alaska · 1843 days ago · 26 km deep · 48 km away
  54. 1.6124 km S of Unalaska, Alaska · 1843 days ago · 2 km deep · 80 km away
  55. 1.552 km SW of Unalaska, Alaska · 1840 days ago · 14 km deep · 23 km away
  56. 1.578 km SW of Unalaska, Alaska · 1840 days ago · 31 km deep · 7 km away
  57. 1.8102 km E of Nikolski, Alaska · 1839 days ago · 25 km deep · 56 km away
  58. 1.620 km WSW of Dutch Harbor, Alaska · 1833 days ago · 7 km deep · 60 km away
  59. 1.521 km WSW of Dutch Harbor, Alaska · 1833 days ago · 7 km deep · 59 km away
  60. 1.621 km WSW of Dutch Harbor, Alaska · 1833 days ago · 7 km deep · 60 km away

The first 60 of 78.

Before

  1. 1.5103 km E of Nikolski, Alaska · 1880 days ago · 48 km deep · 55 km away
  2. 2.061 km WSW of Unalaska, Alaska · 1881 days ago · 109 km deep · 27 km away
  3. 2.756 km ESE of Nikolski, Alaska · 1883 days ago · 32 km deep · 93 km away
  4. 1.720 km SSE of Unalaska, Alaska · 1884 days ago · 73 km deep · 72 km away
  5. 2.781 km S of Unalaska, Alaska · 1884 days ago · 35 km deep · 52 km away
  6. 1.597 km SSW of Unalaska, Alaska · 1884 days ago · 47 km deep · 30 km away
  7. 1.6141 km ESE of Nikolski, Alaska · 1888 days ago · 11 km deep · 98 km away
  8. 2.061 km ESE of Nikolski, Alaska · 1888 days ago · 19 km deep · 98 km away
  9. 2.228 km E of Nikolski, Alaska · 1888 days ago · 92 km deep · 89 km away
  10. 2.249 km ESE of Nikolski, Alaska · 1890 days ago · 27 km deep · 96 km away
  11. 2.365 km SW of Unalaska, Alaska · 1890 days ago · 13 km deep · 12 km away
  12. 2.092 km SW of Unalaska, Alaska · 1893 days ago · 60 km deep · 18 km away
  13. 1.5Fox Islands, Aleutian Islands, Alaska · 1893 days ago · 91 km deep · 34 km away
  14. 1.719 km W of Dutch Harbor, Alaska · 1894 days ago · 4 km deep · 64 km away
  15. 2.731 km S of Unalaska, Alaska · 1894 days ago · 62 km deep · 58 km away
  16. 1.786 km S of Unalaska, Alaska · 1896 days ago · 31 km deep · 49 km away
  17. 1.847 km ESE of Nikolski, Alaska · 1896 days ago · 32 km deep · 95 km away
  18. 1.6125 km S of Unalaska, Alaska · 1896 days ago · 17 km deep · 87 km away
  19. 1.63 km NNW of Dutch Harbor, Alaska · 1896 days ago · 5 km deep · 78 km away
  20. 1.840 km S of Unalaska, Alaska · 1897 days ago · 61 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219qyo9yf. Read Wed, Sep 23, 2026, 2:57 PM UTC.