Alaska earthquakes

M1.7 earthquake 86 km SSW of Unalaska, Alaska

A magnitude 1.7 earthquake struck 86 km SSW of Unalaska, Alaska on Sun, Oct 31, 2021, 12:02 PM AKDT (20:02 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M2.0 77 km S 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
1.7 (ml), micro
Local time
UTC
2021-10-31 20:02:53 UTC
Depth
25.6 km (15.9 mi), shallow
Epicenter
53.210° N, 167.198° 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
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 81 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 2.077 km S of Unalaska, Alaska · 1787 days ago · 26 km deep · 31 km away
  2. 2.0127 km S of Unalaska, Alaska · 1787 days ago · 6 km deep · 64 km away
  3. 2.044 km ESE of Nikolski, Alaska · 1787 days ago · 41 km deep · 92 km away
  4. 2.686 km ENE of Nikolski, Alaska · 1786 days ago · 64 km deep · 29 km away
  5. 1.774 km SSW of Unalaska, Alaska · 1786 days ago · 42 km deep · 29 km away
  6. 1.849 km SSE of Unalaska, Alaska · 1786 days ago · 48 km deep · 71 km away
  7. 1.964 km SSE of Unalaska, Alaska · 1785 days ago · 35 km deep · 61 km away
  8. 5.269 km ESE of Nikolski, Alaska · 1784 days ago · 39 km deep · 78 km away · felt by 5 · tsunami flag
  9. 2.181 km ESE of Nikolski, Alaska · 1784 days ago · 25 km deep · 72 km away
  10. 2.759 km SSW of Unalaska, Alaska · 1784 days ago · 29 km deep · 27 km away
  11. 1.768 km SE of Unalaska, Alaska · 1783 days ago · 22 km deep · 97 km away
  12. 2.298 km S of Unalaska, Alaska · 1782 days ago · 26 km deep · 57 km away
  13. 1.681 km SW of Unalaska, Alaska · 1781 days ago · 13 km deep · 10 km away
  14. 1.5103 km E of Nikolski, Alaska · 1781 days ago · 26 km deep · 29 km away
  15. 1.5105 km E of Nikolski, Alaska · 1781 days ago · 7 km deep · 23 km away
  16. 3.282 km S of Unalaska, Alaska · 1781 days ago · 27 km deep · 36 km away
  17. 2.182 km S of Unalaska, Alaska · 1781 days ago · 26 km deep · 37 km away
  18. 1.623 km S of Unalaska, Alaska · 1780 days ago · 71 km deep · 70 km away
  19. 1.623 km S of Unalaska, Alaska · 1780 days ago · 71 km deep · 70 km away
  20. 1.632 km ESE of Nikolski, Alaska · 1780 days ago · 56 km deep · 96 km away
  21. 1.519 km ESE of Unalaska, Alaska · 1779 days ago · 79 km deep · 88 km away
  22. 3.986 km SSW of Unalaska, Alaska · 1779 days ago · 42 km deep · 9 km away
  23. 1.894 km SSW of Unalaska, Alaska · 1779 days ago · 26 km deep · 19 km away
  24. 1.554 km SE of Unalaska, Alaska · 1777 days ago · 55 km deep · 99 km away
  25. 1.845 km SW of Unalaska, Alaska · 1775 days ago · 10 km deep · 43 km away
  26. 2.675 km SSW of Unalaska, Alaska · 1775 days ago · 41 km deep · 29 km away
  27. 1.5100 km SSW of Unalaska, Alaska · 1774 days ago · 13 km deep · 27 km away
  28. 3.539 km SSE of Unalaska, Alaska · 1774 days ago · 65 km deep · 75 km away
  29. 1.629 km S of Unalaska, Alaska · 1773 days ago · 13 km deep · 65 km away
  30. 2.953 km SE of Nikolski, Alaska · 1773 days ago · 35 km deep · 91 km away
  31. 1.854 km E of Nikolski, Alaska · 1772 days ago · 74 km deep · 63 km away
  32. 2.290 km SW of Unalaska, Alaska · 1771 days ago · 53 km deep · 10 km away
  33. 1.965 km S of Unalaska, Alaska · 1771 days ago · 71 km deep · 42 km away
  34. 2.0107 km ESE of Nikolski, Alaska · 1771 days ago · 15 km deep · 83 km away
  35. 1.791 km SSW of Unalaska, Alaska · 1770 days ago · 26 km deep · 20 km away
  36. 1.824 km S of Unalaska, Alaska · 1769 days ago · 25 km deep · 68 km away
  37. 3.1Fox Islands, Aleutian Islands, Alaska · 1768 days ago · 53 km deep · 83 km away
  38. 1.892 km SSW of Unalaska, Alaska · 1768 days ago · 46 km deep · 6 km away
  39. 2.172 km E of Nikolski, Alaska · 1766 days ago · 35 km deep · 50 km away
  40. 3.828 km E of Nikolski, Alaska · 1766 days ago · 66 km deep · 90 km away
  41. 2.035 km ESE of Unalaska, Alaska · 1766 days ago · 71 km deep · 99 km away
  42. 2.983 km SSW of Unalaska, Alaska · 1765 days ago · 35 km deep · 3 km away
  43. 1.641 km SW of Unalaska, Alaska · 1764 days ago · 68 km deep · 45 km away
  44. 2.551 km ESE of Nikolski, Alaska · 1763 days ago · 35 km deep · 80 km away
  45. 2.270 km SSE of Unalaska, Alaska · 1762 days ago · 37 km deep · 67 km away
  46. 1.656 km SW of Unalaska, Alaska · 1762 days ago · 71 km deep · 31 km away
  47. 2.032 km SE of Nikolski, Alaska · 1761 days ago · 31 km deep · 97 km away
  48. 2.0140 km S of Unalaska, Alaska · 1760 days ago · 26 km deep · 88 km away
  49. 2.988 km S of Unalaska, Alaska · 1760 days ago · 61 km deep · 51 km away
  50. 2.197 km E of Nikolski, Alaska · 1759 days ago · 26 km deep · 32 km away
  51. 2.2103 km E of Nikolski, Alaska · 1758 days ago · 26 km deep · 35 km away
  52. 1.985 km ENE of Nikolski, Alaska · 1758 days ago · 53 km deep · 30 km away
  53. 1.776 km SW of Unalaska, Alaska · 1757 days ago · 11 km deep · 22 km away
  54. 2.154 km ESE of Nikolski, Alaska · 1757 days ago · 22 km deep · 84 km away
  55. 2.7107 km E of Nikolski, Alaska · 1755 days ago · 35 km deep · 39 km away
  56. 1.987 km ENE of Nikolski, Alaska · 1754 days ago · 56 km deep · 29 km away
  57. 1.654 km SW of Unalaska, Alaska · 1753 days ago · 13 km deep · 36 km away
  58. 2.066 km SE of Unalaska, Alaska · 1752 days ago · 39 km deep · 100 km away
  59. 1.877 km SE of Unalaska, Alaska · 1749 days ago · 20 km deep · 97 km away
  60. 2.268 km SE of Unalaska, Alaska · 1746 days ago · 29 km deep · 90 km away

The first 60 of 81.

Before

  1. 1.7108 km S of Unalaska, Alaska · 1788 days ago · 13 km deep · 50 km away
  2. 1.890 km E of Nikolski, Alaska · 1788 days ago · 51 km deep · 36 km away
  3. 3.676 km S of Unalaska, Alaska · 1788 days ago · 35 km deep · 35 km away
  4. 2.074 km SSW of Unalaska, Alaska · 1790 days ago · 26 km deep · 28 km away
  5. 3.470 km SSW of Unalaska, Alaska · 1790 days ago · 30 km deep · 28 km away
  6. 3.172 km SSW of Unalaska, Alaska · 1790 days ago · 35 km deep · 28 km away
  7. 4.477 km S of Unalaska, Alaska · 1790 days ago · 10 km deep · 33 km away
  8. 1.9Fox Islands, Aleutian Islands, Alaska · 1790 days ago · 21 km deep · 27 km away
  9. 3.643 km ESE of Nikolski, Alaska · 1790 days ago · 35 km deep · 88 km away
  10. 1.613 km WSW of Dutch Harbor, Alaska · 1791 days ago · 8 km deep · 78 km away
  11. 1.614 km WSW of Dutch Harbor, Alaska · 1791 days ago · 9 km deep · 77 km away
  12. 2.615 km WSW of Unalaska, Alaska · 1791 days ago · 13 km deep · 76 km away
  13. 1.614 km WSW of Dutch Harbor, Alaska · 1791 days ago · 8 km deep · 77 km away
  14. 2.590 km S of Unalaska, Alaska · 1791 days ago · 29 km deep · 41 km away
  15. 3.948 km ESE of Nikolski, Alaska · 1791 days ago · 42 km deep · 80 km away
  16. 1.513 km WSW of Dutch Harbor, Alaska · 1793 days ago · 10 km deep · 79 km away
  17. 1.513 km WSW of Dutch Harbor, Alaska · 1793 days ago · 10 km deep · 79 km away
  18. 2.014 km WSW of Dutch Harbor, Alaska · 1794 days ago · 7 km deep · 78 km away
  19. 1.719 km WSW of Dutch Harbor, Alaska · 1794 days ago · 6 km deep · 74 km away
  20. 2.9102 km E of Nikolski, Alaska · 1795 days ago · 35 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021dz3aps3. Read Wed, Sep 23, 2026, 5:25 AM UTC.