Montana earthquakes

M1.6 earthquake 61 km SSE of Mammoth, Wyoming

A magnitude 1.6 earthquake struck 61 km SSE of Mammoth, Wyoming on Sun, Jul 18, 2021, 12:51 AM MDT (06:51 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.2 44 km ENE of Warm River, Idaho. 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, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2021-07-18 06:51:55 UTC
Depth
7.1 km (4.4 mi), shallow
Epicenter
44.480° N, 110.368° W
Region
Montana
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 0.4 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
82°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 68 in the 60 days after this one and at least 200 in the 30 days before it.

After

  1. 2.166 km ESE of West Yellowstone, Montana · 1905 days ago · 7 km deep · 7 km away
  2. 2.165 km ESE of West Yellowstone, Montana · 1905 days ago · 3 km deep · 5 km away
  3. 2.165 km ESE of West Yellowstone, Montana · 1905 days ago · 6 km deep · 6 km away
  4. 1.765 km ESE of West Yellowstone, Montana · 1905 days ago · 8 km deep · 6 km away
  5. 1.767 km ESE of West Yellowstone, Montana · 1904 days ago · 6 km deep · 8 km away
  6. 1.867 km ESE of West Yellowstone, Montana · 1904 days ago · 7 km deep · 7 km away
  7. 1.863 km SSE of Mammoth, Wyoming · 1904 days ago · 8 km deep · 2 km away
  8. 1.665 km ESE of West Yellowstone, Montana · 1904 days ago · 6 km deep · 5 km away
  9. 1.563 km ESE of West Yellowstone, Montana · 1904 days ago · 7 km deep · 3 km away
  10. 1.859 km SSE of Mammoth, Wyoming · 1904 days ago · 2 km deep · 2 km away
  11. 2.0Wyoming · 1904 days ago · 3 km deep · 2 km away
  12. 1.863 km ESE of West Yellowstone, Montana · 1904 days ago · 4 km deep · 3 km away
  13. 1.662 km ESE of West Yellowstone, Montana · 1904 days ago · 2 km deep · 2 km away
  14. 2.763 km ESE of West Yellowstone, Montana · 1904 days ago · 3 km deep · 3 km away
  15. 1.862 km ESE of West Yellowstone, Montana · 1904 days ago · 3 km deep · 3 km away
  16. 1.562 km ESE of West Yellowstone, Montana · 1904 days ago · 3 km deep · 3 km away
  17. 1.962 km ESE of West Yellowstone, Montana · 1904 days ago · 3 km deep · 3 km away
  18. 2.164 km ESE of West Yellowstone, Montana · 1903 days ago · 9 km deep · 3 km away
  19. 1.663 km ESE of West Yellowstone, Montana · 1903 days ago · 2 km deep · 4 km away
  20. 1.763 km ESE of West Yellowstone, Montana · 1903 days ago · 2 km deep · 4 km away
  21. 1.762 km ESE of West Yellowstone, Montana · 1903 days ago · 1 km deep · 5 km away
  22. 1.863 km ESE of West Yellowstone, Montana · 1903 days ago · 3 km deep · 3 km away
  23. 1.862 km ESE of West Yellowstone, Montana · 1902 days ago · 8 km deep · 2 km away
  24. 1.821 km N of Hebgen Lake Estates, Montana · 1902 days ago · 3 km deep · 84 km away
  25. 1.768 km SSW of Silver Gate, Montana · 1902 days ago · 6 km deep · 8 km away
  26. 1.763 km ESE of West Yellowstone, Montana · 1901 days ago · 8 km deep · 3 km away
  27. 1.7Wyoming · 1901 days ago · 9 km deep · 9 km away
  28. 1.667 km ESE of West Yellowstone, Montana · 1901 days ago · 11 km deep · 7 km away
  29. 2.467 km ESE of West Yellowstone, Montana · 1901 days ago · 9 km deep · 8 km away
  30. 1.867 km ESE of West Yellowstone, Montana · 1900 days ago · 8 km deep · 8 km away
  31. 1.6Wyoming · 1900 days ago · 5 km deep · 7 km away
  32. 1.663 km ESE of West Yellowstone, Montana · 1900 days ago · 2 km deep · 4 km away
  33. 1.865 km SSE of Mammoth, Wyoming · 1900 days ago · 9 km deep · 5 km away
  34. 2.064 km ESE of West Yellowstone, Montana · 1900 days ago · 8 km deep · 3 km away
  35. 2.311 km ESE of Jardine, Montana · 1899 days ago · 13 km deep · 61 km away
  36. 2.119 km ENE of West Yellowstone, Montana · 1899 days ago · 7 km deep · 50 km away
  37. 1.763 km SSE of Mammoth, Wyoming · 1898 days ago · 8 km deep · 2 km away
  38. 1.818 km ENE of West Yellowstone, Montana · 1898 days ago · 6 km deep · 50 km away
  39. 2.145 km ESE of West Yellowstone, Montana · 1898 days ago · 3 km deep · 17 km away
  40. 1.945 km ESE of West Yellowstone, Montana · 1898 days ago · 5 km deep · 17 km away
  41. 1.550 km SE of Mammoth, Wyoming · 1897 days ago · 4 km deep · 14 km away
  42. 1.926 km S of Mammoth, Wyoming · 1894 days ago · 3 km deep · 39 km away
  43. 1.720 km S of Mammoth, Wyoming · 1893 days ago · 4 km deep · 43 km away
  44. 1.923 km S of Mammoth, Wyoming · 1893 days ago · 5 km deep · 42 km away
  45. 1.549 km SSE of Mammoth, Wyoming · 1887 days ago · 4 km deep · 13 km away
  46. 2.027 km S of Mammoth, Wyoming · 1886 days ago · 4 km deep · 38 km away
  47. 1.639 km SSE of Mammoth, Wyoming · 1885 days ago · 6 km deep · 22 km away
  48. 1.514 km NE of Kelly, Wyoming · 1881 days ago · 6 km deep · 84 km away
  49. 1.733 km SE of West Yellowstone, Montana · 1877 days ago · 4 km deep · 32 km away
  50. 3.019 km NE of West Yellowstone, Montana · 1871 days ago · 9 km deep · 56 km away
  51. 1.719 km NE of West Yellowstone, Montana · 1871 days ago · 7 km deep · 56 km away
  52. 1.525 km SE of Mammoth, Wyoming · 1870 days ago · 7 km deep · 39 km away
  53. 1.834 km SSE of Mammoth, Wyoming · 1870 days ago · 4 km deep · 28 km away
  54. 2.641 km SSE of Mammoth, Wyoming · 1857 days ago · 5 km deep · 20 km away
  55. 3.041 km SSE of Mammoth, Wyoming · 1857 days ago · 6 km deep · 20 km away · felt by 9
  56. 1.841 km SSE of Mammoth, Wyoming · 1856 days ago · 4 km deep · 20 km away
  57. 1.641 km SSE of Mammoth, Wyoming · 1856 days ago · 8 km deep · 21 km away
  58. 1.545 km ENE of Warm River, Idaho · 1852 days ago · 15 km deep · 42 km away
  59. 3.244 km ENE of Warm River, Idaho · 1852 days ago · 5 km deep · 43 km away
  60. 2.141 km ENE of Warm River, Idaho · 1852 days ago · 6 km deep · 46 km away

The first 60 of 68.

Before

  1. 1.664 km ESE of West Yellowstone, Montana · 1905 days ago · 8 km deep · 4 km away
  2. 2.365 km ESE of West Yellowstone, Montana · 1905 days ago · 10 km deep · 4 km away
  3. 2.164 km ESE of West Yellowstone, Montana · 1905 days ago · 7 km deep · 3 km away
  4. 2.163 km ESE of West Yellowstone, Montana · 1905 days ago · 2 km deep · 3 km away
  5. 2.264 km ESE of West Yellowstone, Montana · 1905 days ago · 5 km deep · 6 km away
  6. 1.563 km ESE of West Yellowstone, Montana · 1905 days ago · 2 km deep · 4 km away
  7. 1.563 km ESE of West Yellowstone, Montana · 1905 days ago · 4 km deep · 4 km away
  8. 2.064 km ESE of West Yellowstone, Montana · 1905 days ago · 7 km deep · 4 km away
  9. 1.764 km ESE of West Yellowstone, Montana · 1905 days ago · 8 km deep · 3 km away
  10. 1.8Wyoming · 1905 days ago · 7 km deep · 6 km away
  11. 1.764 km ESE of West Yellowstone, Montana · 1905 days ago · 5 km deep · 4 km away
  12. 2.066 km ESE of West Yellowstone, Montana · 1905 days ago · 8 km deep · 6 km away
  13. 2.162 km SSE of Mammoth, Wyoming · 1905 days ago · 6 km deep · 1 km away
  14. 1.962 km SSE of Mammoth, Wyoming · 1905 days ago · 7 km deep · 1 km away
  15. 1.662 km ESE of West Yellowstone, Montana · 1905 days ago · 2 km deep · 1 km away
  16. 1.762 km SSE of Mammoth, Wyoming · 1905 days ago · 3 km deep · 1 km away
  17. 1.865 km ESE of West Yellowstone, Montana · 1905 days ago · 8 km deep · 6 km away
  18. 1.966 km ESE of West Yellowstone, Montana · 1905 days ago · 8 km deep · 6 km away
  19. 1.861 km SSE of Mammoth, Wyoming · 1905 days ago · 7 km deep · 0 km away
  20. 1.759 km ESE of West Yellowstone, Montana · 1905 days ago · 2 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60448252. Read Sun, Oct 4, 2026, 11:55 PM UTC.