Montana earthquakes

M1.8 earthquake 48 km SSE of Mammoth, Wyoming

A magnitude 1.8 earthquake struck 48 km SSE of Mammoth, Wyoming on Sun, Oct 23, 2016, 3:03 PM MDT (21:03 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.9 49 km SE of West Yellowstone, Montana. This one was a foreshock.

Gardiner forecastMore in Montana

Map

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

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The earthquake

Magnitude
1.8 (ml), micro
Local time
UTC
2016-10-23 21:03:10 UTC
Depth
3.8 km (2.4 mi), shallow
Epicenter
44.612° N, 110.362° 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 1.0 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
191°, poorly surrounded by stations
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 50 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 1.948 km SSE of Mammoth, Wyoming · 3627 days ago · 4 km deep · 2 km away
  2. 1.619 km NE of West Yellowstone, Montana · 3627 days ago · 6 km deep · 49 km away
  3. 1.513 km NNE of West Yellowstone, Montana · 3621 days ago · 7 km deep · 54 km away
  4. 1.834 km S of Silver Gate, Montana · 3621 days ago · 2 km deep · 28 km away
  5. 1.733 km S of Silver Gate, Montana · 3620 days ago · 15 km deep · 30 km away
  6. 1.549 km SE of West Yellowstone, Montana · 3619 days ago · 5 km deep · 34 km away
  7. 2.328 km W of Hebgen Lake Estates, Montana · 3615 days ago · 13 km deep · 96 km away · felt by 2
  8. 1.740 km S of Silver Gate, Montana · 3608 days ago · 8 km deep · 27 km away
  9. 1.841 km ENE of Warm River, Idaho · 3606 days ago · 1 km deep · 56 km away
  10. 1.725 km SE of Mammoth, Wyoming · 3604 days ago · 5 km deep · 23 km away
  11. 2.541 km SSE of West Yellowstone, Montana · 3604 days ago · 11 km deep · 50 km away · felt by 1
  12. 2.249 km SE of West Yellowstone, Montana · 3603 days ago · 6 km deep · 38 km away
  13. 1.749 km SE of West Yellowstone, Montana · 3603 days ago · 7 km deep · 37 km away
  14. 2.625 km SE of Mammoth, Wyoming · 3599 days ago · 3 km deep · 24 km away
  15. 1.549 km SE of West Yellowstone, Montana · 3595 days ago · 6 km deep · 37 km away
  16. 1.649 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  17. 1.850 km SE of West Yellowstone, Montana · 3595 days ago · 7 km deep · 38 km away
  18. 2.149 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  19. 2.549 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  20. 2.449 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  21. 2.548 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  22. 1.647 km SE of West Yellowstone, Montana · 3595 days ago · 2 km deep · 37 km away
  23. 2.949 km SE of West Yellowstone, Montana · 3595 days ago · 3 km deep · 37 km away
  24. 2.249 km SE of West Yellowstone, Montana · 3595 days ago · 2 km deep · 38 km away
  25. 1.649 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  26. 1.649 km SE of West Yellowstone, Montana · 3595 days ago · 3 km deep · 37 km away
  27. 1.948 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  28. 1.648 km SE of West Yellowstone, Montana · 3595 days ago · 2 km deep · 37 km away
  29. 1.849 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 37 km away
  30. 2.048 km SE of West Yellowstone, Montana · 3595 days ago · 4 km deep · 36 km away
  31. 1.648 km SE of West Yellowstone, Montana · 3595 days ago · 5 km deep · 37 km away
  32. 2.941 km SSE of Mammoth, Wyoming · 3593 days ago · 4 km deep · 7 km away · felt by 3
  33. 2.342 km SSE of Mammoth, Wyoming · 3593 days ago · 5 km deep · 7 km away
  34. 1.842 km SSE of Mammoth, Wyoming · 3593 days ago · 6 km deep · 7 km away
  35. 1.942 km SSE of Mammoth, Wyoming · 3593 days ago · 5 km deep · 7 km away
  36. 1.627 km S of Mammoth, Wyoming · 3593 days ago · 5 km deep · 35 km away
  37. 1.526 km WNW of Hebgen Lake Estates, Montana · 3593 days ago · 7 km deep · 94 km away
  38. 1.9Wyoming · 3591 days ago · 2 km deep · 34 km away
  39. 2.014 km NE of West Yellowstone, Montana · 3590 days ago · 8 km deep · 51 km away
  40. 1.747 km SE of Mammoth, Wyoming · 3588 days ago · 5 km deep · 4 km away
  41. 2.026 km W of Hebgen Lake Estates, Montana · 3588 days ago · 13 km deep · 94 km away
  42. 1.945 km ESE of West Yellowstone, Montana · 3581 days ago · 4 km deep · 21 km away
  43. 2.044 km ESE of West Yellowstone, Montana · 3581 days ago · 2 km deep · 21 km away
  44. 1.945 km ESE of West Yellowstone, Montana · 3581 days ago · 2 km deep · 21 km away
  45. 2.226 km S of Mammoth, Wyoming · 3577 days ago · 7 km deep · 35 km away
  46. 2.326 km SSW of Mammoth, Wyoming · 3577 days ago · 6 km deep · 35 km away
  47. 1.648 km ESE of West Yellowstone, Montana · 3577 days ago · 4 km deep · 21 km away
  48. 1.727 km W of Hebgen Lake Estates, Montana · 3576 days ago · 13 km deep · 95 km away
  49. 1.649 km SE of West Yellowstone, Montana · 3569 days ago · 4 km deep · 37 km away
  50. 1.727 km S of Mammoth, Wyoming · 3567 days ago · 5 km deep · 35 km away

Before

  1. 1.647 km SSE of Mammoth, Wyoming · 3627 days ago · 3 km deep · 2 km away
  2. 1.648 km SSE of Mammoth, Wyoming · 3627 days ago · 2 km deep · 1 km away
  3. 1.847 km SSE of Mammoth, Wyoming · 3627 days ago · 3 km deep · 4 km away
  4. 1.948 km SSE of Mammoth, Wyoming · 3627 days ago · 5 km deep · 2 km away
  5. 1.747 km SSE of Mammoth, Wyoming · 3627 days ago · 4 km deep · 2 km away
  6. 2.246 km SSE of Mammoth, Wyoming · 3627 days ago · 2 km deep · 6 km away
  7. 2.047 km SSE of Mammoth, Wyoming · 3627 days ago · 2 km deep · 2 km away
  8. 2.047 km SSE of Mammoth, Wyoming · 3627 days ago · 5 km deep · 2 km away
  9. 2.031 km SSE of West Yellowstone, Montana · 3628 days ago · 8 km deep · 50 km away
  10. 2.423 km ENE of Hebgen Lake Estates, Montana · 3629 days ago · 8 km deep · 49 km away
  11. 2.2Wyoming · 3630 days ago · 6 km deep · 8 km away
  12. 2.541 km SSE of Mammoth, Wyoming · 3630 days ago · 6 km deep · 7 km away
  13. 1.532 km ESE of West Yellowstone, Montana · 3634 days ago · 8 km deep · 28 km away
  14. 1.941 km SSE of Mammoth, Wyoming · 3636 days ago · 5 km deep · 7 km away
  15. 1.839 km S of Silver Gate, Montana · 3639 days ago · 11 km deep · 27 km away
  16. 1.837 km S of Silver Gate, Montana · 3640 days ago · 15 km deep · 29 km away
  17. 1.73 km NE of Hebgen Lake Estates, Montana · 3640 days ago · 11 km deep · 66 km away
  18. 2.110 km NNE of West Yellowstone, Montana · 3642 days ago · 7 km deep · 57 km away
  19. 1.639 km SE of Mammoth, Wyoming · 3645 days ago · 6 km deep · 9 km away
  20. 2.339 km S of Silver Gate, Montana · 3647 days ago · 11 km deep · 28 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60009820. Read Mon, Sep 28, 2026, 9:36 PM UTC.