Alaska earthquakes

M3.7 earthquake 68 km SW of Nikolski, Alaska

A magnitude 3.7 earthquake struck 68 km SW of Nikolski, Alaska on Fri, Oct 15, 2021, 7:13 AM AKDT (15:13 UTC), 130 km (81 mi) below the surface.

A larger quake followed: M3.9 Fox Islands, Aleutian Islands, 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
3.7 (mb), minor
Local time
UTC
2021-10-15 15:13:27 UTC
Depth
130.5 km (81.1 mi), intermediate-depth
Epicenter
52.460° N, 169.495° 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.

Location uncertainty
About 7.6 km horizontally, 11.7 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
207°, poorly surrounded by stations
Stations used
54

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 35 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 3.9Fox Islands, Aleutian Islands, Alaska · 1806 days ago · 46 km deep · 55 km away
  2. 3.342 km SSE of Nikolski, Alaska · 1806 days ago · 40 km deep · 62 km away
  3. 2.345 km SW of Nikolski, Alaska · 1805 days ago · 20 km deep · 27 km away
  4. 2.9125 km SW of Nikolski, Alaska · 1799 days ago · 24 km deep · 60 km away
  5. 3.0143 km SW of Nikolski, Alaska · 1797 days ago · 17 km deep · 79 km away
  6. 3.948 km ESE of Nikolski, Alaska · 1797 days ago · 42 km deep · 96 km away
  7. 2.330 km S of Nikolski, Alaska · 1796 days ago · 51 km deep · 45 km away
  8. 3.643 km ESE of Nikolski, Alaska · 1796 days ago · 35 km deep · 89 km away
  9. 2.5136 km SW of Nikolski, Alaska · 1794 days ago · 19 km deep · 68 km away
  10. 2.044 km ESE of Nikolski, Alaska · 1793 days ago · 41 km deep · 86 km away
  11. 2.011 km S of Nikolski, Alaska · 1791 days ago · 68 km deep · 60 km away
  12. 2.015 km NNE of Nikolski, Alaska · 1786 days ago · 95 km deep · 83 km away
  13. 3.6155 km SW of Nikolski, Alaska · 1785 days ago · 35 km deep · 89 km away
  14. 1.632 km ESE of Nikolski, Alaska · 1785 days ago · 56 km deep · 80 km away
  15. 2.892 km SSE of Nikolski, Alaska · 1785 days ago · 10 km deep · 92 km away
  16. 3.191 km SSW of Nikolski, Alaska · 1782 days ago · 35 km deep · 33 km away
  17. 3.073 km SSW of Nikolski, Alaska · 1782 days ago · 7 km deep · 9 km away
  18. 3.167 km SW of Nikolski, Alaska · 1781 days ago · 31 km deep · 3 km away
  19. 1.739 km WSW of Nikolski, Alaska · 1780 days ago · 5 km deep · 44 km away
  20. 2.953 km SE of Nikolski, Alaska · 1778 days ago · 35 km deep · 90 km away
  21. 2.083 km SW of Nikolski, Alaska · 1776 days ago · 18 km deep · 18 km away
  22. 2.556 km W of Nikolski, Alaska · 1775 days ago · 85 km deep · 55 km away
  23. 2.9122 km W of Nikolski, Alaska · 1775 days ago · 134 km deep · 99 km away
  24. 2.249 km SW of Nikolski, Alaska · 1774 days ago · 10 km deep · 20 km away
  25. 3.1Fox Islands, Aleutian Islands, Alaska · 1773 days ago · 53 km deep · 93 km away
  26. 3.828 km E of Nikolski, Alaska · 1772 days ago · 66 km deep · 86 km away
  27. 3.994 km SSE of Nikolski, Alaska · 1770 days ago · 24 km deep · 98 km away
  28. 2.551 km ESE of Nikolski, Alaska · 1768 days ago · 35 km deep · 98 km away
  29. 2.032 km SE of Nikolski, Alaska · 1767 days ago · 31 km deep · 78 km away
  30. 2.248 km S of Nikolski, Alaska · 1763 days ago · 47 km deep · 39 km away
  31. 2.154 km ESE of Nikolski, Alaska · 1762 days ago · 22 km deep · 95 km away
  32. 2.561 km SW of Nikolski, Alaska · 1751 days ago · 35 km deep · 8 km away
  33. 3.154 km SW of Nikolski, Alaska · 1751 days ago · 35 km deep · 15 km away
  34. 2.388 km SSW of Nikolski, Alaska · 1749 days ago · 27 km deep · 37 km away
  35. 2.487 km S of Nikolski, Alaska · 1749 days ago · 14 km deep · 42 km away

Before

  1. 3.8Fox Islands, Aleutian Islands, Alaska · 1811 days ago · 35 km deep · 36 km away
  2. 2.954 km SW of Nikolski, Alaska · 1817 days ago · 35 km deep · 14 km away
  3. 2.225 km W of Nikolski, Alaska · 1818 days ago · 86 km deep · 53 km away
  4. 3.1126 km WSW of Nikolski, Alaska · 1819 days ago · 123 km deep · 66 km away
  5. 1.846 km SE of Nikolski, Alaska · 1831 days ago · 22 km deep · 86 km away
  6. 1.944 km ESE of Nikolski, Alaska · 1831 days ago · 39 km deep · 85 km away
  7. 4.439 km ESE of Nikolski, Alaska · 1831 days ago · 39 km deep · 83 km away
  8. 2.652 km ESE of Nikolski, Alaska · 1833 days ago · 34 km deep · 95 km away
  9. 2.749 km S of Nikolski, Alaska · 1833 days ago · 13 km deep · 41 km away
  10. 3.1113 km SW of Nikolski, Alaska · 1834 days ago · 35 km deep · 45 km away
  11. 3.195 km SSW of Nikolski, Alaska · 1838 days ago · 7 km deep · 34 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fw5q (also filed as ak021d8jsaw4). Read Mon, Sep 28, 2026, 7:26 PM UTC.