Wyoming earthquakes

M1.6 earthquake 47 km W of Cody, Wyoming

A magnitude 1.6 earthquake struck 47 km W of Cody, Wyoming on Sun, Oct 17, 2021, 2:17 AM MDT (08:17 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.5 46 km NE of Alta, Wyoming. This one was a foreshock.

Cody forecastMore in Wyoming

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, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2021-10-17 08:17:39 UTC
Depth
9.4 km (5.8 mi), shallow
Epicenter
44.548° N, 109.658° W
Region
Wyoming
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 1.0 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
192°, poorly surrounded by stations
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: 34 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 1.647 km ESE of West Yellowstone, Montana · 1812 days ago · 5 km deep · 71 km away
  2. 1.751 km SE of West Yellowstone, Montana · 1810 days ago · 4 km deep · 82 km away
  3. 1.922 km S of Mammoth, Wyoming · 1806 days ago · 4 km deep · 87 km away
  4. 1.632 km ESE of West Yellowstone, Montana · 1806 days ago · 6 km deep · 84 km away
  5. 1.631 km ESE of West Yellowstone, Montana · 1806 days ago · 7 km deep · 85 km away
  6. 1.629 km S of Mammoth, Wyoming · 1806 days ago · 5 km deep · 82 km away
  7. 1.829 km S of Mammoth, Wyoming · 1806 days ago · 5 km deep · 83 km away
  8. 1.7Wyoming · 1806 days ago · 4 km deep · 83 km away
  9. 2.128 km S of Mammoth, Wyoming · 1806 days ago · 5 km deep · 83 km away
  10. 1.946 km NE of Alta, Wyoming · 1804 days ago · 10 km deep · 96 km away
  11. 1.937 km S of Silver Gate, Montana · 1803 days ago · 13 km deep · 33 km away
  12. 1.637 km S of Silver Gate, Montana · 1803 days ago · 14 km deep · 34 km away
  13. 2.336 km S of Silver Gate, Montana · 1802 days ago · 13 km deep · 33 km away
  14. 2.028 km S of Mammoth, Wyoming · 1798 days ago · 5 km deep · 83 km away
  15. 1.727 km S of Mammoth, Wyoming · 1798 days ago · 5 km deep · 83 km away
  16. 1.728 km S of Mammoth, Wyoming · 1798 days ago · 4 km deep · 83 km away
  17. 1.544 km SE of West Yellowstone, Montana · 1797 days ago · 4 km deep · 84 km away
  18. 1.927 km S of Mammoth, Wyoming · 1793 days ago · 4 km deep · 84 km away
  19. 2.546 km NE of Alta, Wyoming · 1789 days ago · 10 km deep · 96 km away · felt by 1
  20. 2.246 km NE of Alta, Wyoming · 1789 days ago · 7 km deep · 96 km away
  21. 1.540 km SSE of West Yellowstone, Montana · 1788 days ago · 2 km deep · 97 km away
  22. 1.6Wyoming · 1788 days ago · 9 km deep · 96 km away
  23. 1.727 km S of Mammoth, Wyoming · 1787 days ago · 4 km deep · 84 km away
  24. 1.846 km NE of Alta, Wyoming · 1786 days ago · 10 km deep · 96 km away
  25. 1.950 km SSE of Mammoth, Wyoming · 1783 days ago · 2 km deep · 59 km away
  26. 1.928 km S of Mammoth, Wyoming · 1778 days ago · 4 km deep · 83 km away
  27. 1.829 km S of Mammoth, Wyoming · 1777 days ago · 5 km deep · 83 km away
  28. 1.830 km ESE of West Yellowstone, Montana · 1773 days ago · 8 km deep · 85 km away
  29. 1.939 km ESE of West Yellowstone, Montana · 1772 days ago · 7 km deep · 77 km away
  30. 1.946 km ESE of West Yellowstone, Montana · 1770 days ago · 7 km deep · 70 km away
  31. 1.922 km SSW of Mammoth, Wyoming · 1768 days ago · 4 km deep · 94 km away
  32. 1.619 km ENE of West Yellowstone, Montana · 1764 days ago · 8 km deep · 99 km away
  33. 1.7Wyoming · 1763 days ago · 13 km deep · 30 km away
  34. 1.828 km S of Mammoth, Wyoming · 1760 days ago · 4 km deep · 83 km away

Before

  1. 1.666 km ESE of West Yellowstone, Montana · 1816 days ago · 7 km deep · 56 km away
  2. 1.665 km ESE of West Yellowstone, Montana · 1816 days ago · 7 km deep · 56 km away
  3. 1.528 km E of West Yellowstone, Montana · 1820 days ago · 8 km deep · 87 km away
  4. 1.528 km E of West Yellowstone, Montana · 1820 days ago · 8 km deep · 87 km away
  5. 1.760 km SE of West Yellowstone, Montana · 1821 days ago · 4 km deep · 70 km away
  6. 1.523 km SSE of Mammoth, Wyoming · 1825 days ago · 4 km deep · 81 km away
  7. 1.625 km SSE of Mammoth, Wyoming · 1825 days ago · 5 km deep · 81 km away
  8. 1.524 km SSE of Mammoth, Wyoming · 1825 days ago · 5 km deep · 80 km away
  9. 1.524 km SSE of Mammoth, Wyoming · 1825 days ago · 2 km deep · 80 km away
  10. 2.625 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 80 km away
  11. 1.623 km SSE of Mammoth, Wyoming · 1826 days ago · 2 km deep · 81 km away
  12. 1.625 km SSE of Mammoth, Wyoming · 1826 days ago · 4 km deep · 81 km away
  13. 1.625 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 80 km away
  14. 2.325 km SSE of Mammoth, Wyoming · 1826 days ago · 4 km deep · 80 km away
  15. 2.224 km SSE of Mammoth, Wyoming · 1826 days ago · 3 km deep · 81 km away
  16. 2.024 km SSE of Mammoth, Wyoming · 1826 days ago · 3 km deep · 80 km away
  17. 2.425 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 80 km away
  18. 1.624 km SSE of Mammoth, Wyoming · 1826 days ago · 3 km deep · 81 km away
  19. 2.5Wyoming · 1826 days ago · 4 km deep · 80 km away
  20. 1.824 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80527149. Read Sun, Oct 4, 2026, 3:18 PM UTC.