Montana earthquakes

M1.7 earthquake 28 km S of Mammoth, Wyoming

A magnitude 1.7 earthquake struck 28 km S of Mammoth, Wyoming on Mon, Sep 27, 2021, 4:19 AM MDT (10:19 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.6 25 km SSE of Mammoth, Wyoming. This one was a foreshock.

West Yellowstone forecastMore in Montana

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
1.7 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2021-09-27 10:19:17 UTC
Depth
4.2 km (2.6 mi), shallow
Epicenter
44.721° N, 110.679° 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 0.5 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
142°
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: 60 in the 60 days after this one and 29 in the 30 days before it.

After

  1. 1.659 km ESE of West Yellowstone, Montana · 1831 days ago · 7 km deep · 37 km away
  2. 1.659 km ESE of West Yellowstone, Montana · 1831 days ago · 8 km deep · 37 km away
  3. 1.960 km ESE of West Yellowstone, Montana · 1831 days ago · 8 km deep · 37 km away
  4. 1.829 km E of West Yellowstone, Montana · 1830 days ago · 8 km deep · 12 km away
  5. 1.913 km E of Hebgen Lake Estates, Montana · 1829 days ago · 8 km deep · 28 km away
  6. 2.017 km ENE of West Yellowstone, Montana · 1829 days ago · 10 km deep · 19 km away
  7. 1.821 km W of Hebgen Lake Estates, Montana · 1828 days ago · 11 km deep · 62 km away
  8. 1.836 km S of Silver Gate, Montana · 1828 days ago · 3 km deep · 50 km away
  9. 1.824 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 6 km away
  10. 2.5Wyoming · 1826 days ago · 4 km deep · 6 km away
  11. 1.624 km SSE of Mammoth, Wyoming · 1826 days ago · 3 km deep · 6 km away
  12. 2.425 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 5 km away
  13. 2.024 km SSE of Mammoth, Wyoming · 1826 days ago · 3 km deep · 6 km away
  14. 2.224 km SSE of Mammoth, Wyoming · 1826 days ago · 3 km deep · 6 km away
  15. 2.325 km SSE of Mammoth, Wyoming · 1826 days ago · 4 km deep · 6 km away
  16. 1.625 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 6 km away
  17. 1.625 km SSE of Mammoth, Wyoming · 1826 days ago · 4 km deep · 5 km away
  18. 1.623 km SSE of Mammoth, Wyoming · 1826 days ago · 2 km deep · 6 km away
  19. 2.625 km SSE of Mammoth, Wyoming · 1826 days ago · 5 km deep · 5 km away
  20. 1.524 km SSE of Mammoth, Wyoming · 1825 days ago · 2 km deep · 6 km away
  21. 1.524 km SSE of Mammoth, Wyoming · 1825 days ago · 5 km deep · 6 km away
  22. 1.625 km SSE of Mammoth, Wyoming · 1825 days ago · 5 km deep · 5 km away
  23. 1.523 km SSE of Mammoth, Wyoming · 1825 days ago · 4 km deep · 7 km away
  24. 1.760 km SE of West Yellowstone, Montana · 1821 days ago · 4 km deep · 45 km away
  25. 1.528 km E of West Yellowstone, Montana · 1820 days ago · 8 km deep · 9 km away
  26. 1.528 km E of West Yellowstone, Montana · 1820 days ago · 8 km deep · 9 km away
  27. 1.665 km ESE of West Yellowstone, Montana · 1817 days ago · 7 km deep · 42 km away
  28. 1.666 km ESE of West Yellowstone, Montana · 1817 days ago · 7 km deep · 42 km away
  29. 1.647 km W of Cody, Wyoming · 1814 days ago · 9 km deep · 83 km away
  30. 1.647 km ESE of West Yellowstone, Montana · 1812 days ago · 5 km deep · 26 km away
  31. 1.938 km WNW of Hebgen Lake Estates, Montana · 1811 days ago · 10 km deep · 79 km away
  32. 1.751 km SE of West Yellowstone, Montana · 1810 days ago · 4 km deep · 43 km away
  33. 1.922 km S of Mammoth, Wyoming · 1806 days ago · 4 km deep · 7 km away
  34. 1.632 km ESE of West Yellowstone, Montana · 1806 days ago · 6 km deep · 17 km away
  35. 1.631 km ESE of West Yellowstone, Montana · 1806 days ago · 7 km deep · 16 km away
  36. 1.629 km S of Mammoth, Wyoming · 1806 days ago · 5 km deep · 1 km away
  37. 1.829 km S of Mammoth, Wyoming · 1806 days ago · 5 km deep · 1 km away
  38. 1.7Wyoming · 1806 days ago · 4 km deep · 1 km away
  39. 2.128 km S of Mammoth, Wyoming · 1806 days ago · 5 km deep · 0 km away
  40. 1.946 km NE of Alta, Wyoming · 1804 days ago · 10 km deep · 71 km away
  41. 1.937 km S of Silver Gate, Montana · 1803 days ago · 13 km deep · 51 km away
  42. 1.637 km S of Silver Gate, Montana · 1803 days ago · 14 km deep · 50 km away
  43. 2.336 km S of Silver Gate, Montana · 1803 days ago · 13 km deep · 51 km away
  44. 2.028 km S of Mammoth, Wyoming · 1799 days ago · 5 km deep · 0 km away
  45. 1.727 km S of Mammoth, Wyoming · 1799 days ago · 5 km deep · 1 km away
  46. 1.728 km S of Mammoth, Wyoming · 1799 days ago · 4 km deep · 0 km away
  47. 1.544 km SE of West Yellowstone, Montana · 1798 days ago · 4 km deep · 36 km away
  48. 1.927 km S of Mammoth, Wyoming · 1793 days ago · 4 km deep · 1 km away
  49. 2.321 km ENE of Hebgen Lake Estates, Montana · 1791 days ago · 8 km deep · 26 km away
  50. 1.526 km W of Hebgen Lake Estates, Montana · 1790 days ago · 13 km deep · 67 km away
  51. 1.621 km ENE of Hebgen Lake Estates, Montana · 1790 days ago · 7 km deep · 26 km away
  52. 2.546 km NE of Alta, Wyoming · 1789 days ago · 10 km deep · 71 km away · felt by 1
  53. 2.246 km NE of Alta, Wyoming · 1789 days ago · 7 km deep · 72 km away
  54. 1.540 km SSE of West Yellowstone, Montana · 1789 days ago · 2 km deep · 43 km away
  55. 1.6Wyoming · 1789 days ago · 9 km deep · 44 km away
  56. 1.727 km S of Mammoth, Wyoming · 1787 days ago · 4 km deep · 1 km away
  57. 1.846 km NE of Alta, Wyoming · 1787 days ago · 10 km deep · 71 km away
  58. 1.950 km SSE of Mammoth, Wyoming · 1783 days ago · 2 km deep · 27 km away
  59. 1.928 km S of Mammoth, Wyoming · 1779 days ago · 4 km deep · 0 km away
  60. 1.829 km S of Mammoth, Wyoming · 1777 days ago · 5 km deep · 1 km away

Before

  1. 1.731 km E of West Yellowstone, Montana · 1834 days ago · 8 km deep · 13 km away
  2. 1.631 km ESE of West Yellowstone, Montana · 1834 days ago · 3 km deep · 15 km away
  3. 1.631 km ESE of West Yellowstone, Montana · 1834 days ago · 5 km deep · 13 km away
  4. 1.731 km E of West Yellowstone, Montana · 1834 days ago · 6 km deep · 13 km away
  5. 2.016 km ENE of Hebgen Lake Estates, Montana · 1836 days ago · 8 km deep · 26 km away
  6. 1.829 km E of West Yellowstone, Montana · 1838 days ago · 7 km deep · 10 km away
  7. 1.720 km NE of West Yellowstone, Montana · 1838 days ago · 7 km deep · 21 km away
  8. 1.529 km E of West Yellowstone, Montana · 1838 days ago · 6 km deep · 9 km away
  9. 1.629 km E of West Yellowstone, Montana · 1838 days ago · 9 km deep · 11 km away
  10. 2.215 km ENE of Hebgen Lake Estates, Montana · 1840 days ago · 8 km deep · 27 km away
  11. 1.729 km E of West Yellowstone, Montana · 1842 days ago · 7 km deep · 11 km away
  12. 1.629 km E of West Yellowstone, Montana · 1842 days ago · 7 km deep · 10 km away
  13. 1.729 km ESE of West Yellowstone, Montana · 1845 days ago · 7 km deep · 17 km away
  14. 1.724 km SE of Mammoth, Wyoming · 1846 days ago · 12 km deep · 20 km away
  15. 2.08 km ESE of Hebgen Lake Estates, Montana · 1849 days ago · 12 km deep · 32 km away
  16. 3.044 km ENE of Warm River, Idaho · 1852 days ago · 11 km deep · 55 km away · felt by 1
  17. 1.6Wyoming · 1852 days ago · 6 km deep · 55 km away
  18. 2.343 km ENE of Warm River, Idaho · 1852 days ago · 5 km deep · 54 km away · felt by 1
  19. 1.943 km ENE of Warm River, Idaho · 1852 days ago · 7 km deep · 54 km away
  20. 1.643 km ENE of Warm River, Idaho · 1852 days ago · 7 km deep · 54 km away

Earthquakes todayMontana earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60459862. Read Sun, Oct 4, 2026, 8:39 PM UTC.