Montana earthquakes

M1.7 earthquake 24 km SSW of Mammoth, Wyoming

A magnitude 1.7 earthquake struck 24 km SSW of Mammoth, Wyoming on Sun, Oct 27, 2019, 3:45 AM MDT (09:45 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.5 18 km E of Island Park, 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
1.7 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2019-10-27 09:45:02 UTC
Depth
3.0 km (1.9 mi), shallow
Epicenter
44.761° N, 110.779° 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, 2.0 km in depth
Magnitude uncertainty
±0.40
Depth from
From location
Station coverage gap
86°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 40 in the 60 days after this one and 28 in the 30 days before it.

After

  1. 2.124 km SSW of Mammoth, Wyoming · 2535 days ago · 5 km deep · 2 km away
  2. 1.824 km SSW of Mammoth, Wyoming · 2535 days ago · 4 km deep · 2 km away
  3. 1.825 km SSW of Mammoth, Wyoming · 2534 days ago · 4 km deep · 2 km away
  4. 2.524 km SSW of Mammoth, Wyoming · 2534 days ago · 6 km deep · 2 km away
  5. 1.924 km SSW of Mammoth, Wyoming · 2534 days ago · 5 km deep · 2 km away
  6. 2.024 km SSW of Mammoth, Wyoming · 2534 days ago · 5 km deep · 2 km away
  7. 2.841 km NNE of Spencer, Idaho · 2531 days ago · 10 km deep · 90 km away
  8. 1.843 km NE of Spencer, Idaho · 2531 days ago · 11 km deep · 88 km away
  9. 2.740 km NNE of Spencer, Idaho · 2531 days ago · 10 km deep · 90 km away
  10. 1.924 km SSW of Mammoth, Wyoming · 2531 days ago · 2 km deep · 1 km away
  11. 1.643 km NE of Spencer, Idaho · 2531 days ago · 10 km deep · 88 km away
  12. 2.242 km NE of Spencer, Idaho · 2531 days ago · 9 km deep · 88 km away
  13. 2.043 km NE of Spencer, Idaho · 2530 days ago · 8 km deep · 88 km away
  14. 1.842 km NE of Spencer, Idaho · 2527 days ago · 11 km deep · 87 km away
  15. 2.242 km NE of Spencer, Idaho · 2524 days ago · 12 km deep · 88 km away
  16. 3.017 km WNW of Hebgen Lake Estates, Montana · 2521 days ago · 10 km deep · 50 km away · felt by 2
  17. 1.757 km NNE of Kelly, Wyoming · 2512 days ago · 6 km deep · 80 km away
  18. 1.642 km NNE of Spencer, Idaho · 2510 days ago · 11 km deep · 88 km away
  19. 1.846 km ESE of West Yellowstone, Montana · 2509 days ago · 4 km deep · 37 km away
  20. 2.434 km W of Hebgen Lake Estates, Montana · 2508 days ago · 10 km deep · 67 km away
  21. 2.815 km S of Mammoth, Wyoming · 2507 days ago · 6 km deep · 12 km away
  22. 1.746 km SE of West Yellowstone, Montana · 2501 days ago · 4 km deep · 39 km away
  23. 1.849 km ESE of West Yellowstone, Montana · 2501 days ago · 1 km deep · 40 km away
  24. 2.1Wyoming · 2501 days ago · 4 km deep · 39 km away
  25. 1.527 km W of Hebgen Lake Estates, Montana · 2501 days ago · 13 km deep · 60 km away
  26. 1.548 km ESE of West Yellowstone, Montana · 2498 days ago · 4 km deep · 35 km away
  27. 1.530 km SSE of Virginia City, Montana · 2489 days ago · 12 km deep · 84 km away
  28. 2.030 km SSE of Virginia City, Montana · 2489 days ago · 11 km deep · 83 km away
  29. 1.929 km SSE of Virginia City, Montana · 2488 days ago · 6 km deep · 91 km away
  30. 3.440 km ESE of West Yellowstone, Montana · 2486 days ago · 4 km deep · 24 km away · felt by 1
  31. 1.743 km NE of Spencer, Idaho · 2486 days ago · 12 km deep · 88 km away
  32. 3.518 km E of Island Park, Idaho · 2486 days ago · 17 km deep · 49 km away · felt by 5
  33. 2.427 km WNW of Hebgen Lake Estates, Montana · 2485 days ago · 10 km deep · 59 km away · felt by 1
  34. 1.534 km S of Virginia City, Montana · 2481 days ago · 4 km deep · 96 km away
  35. 2.740 km ESE of West Yellowstone, Montana · 2477 days ago · 4 km deep · 24 km away
  36. 2.149 km SE of West Yellowstone, Montana · 2476 days ago · 4 km deep · 47 km away
  37. 1.749 km SE of West Yellowstone, Montana · 2476 days ago · 5 km deep · 47 km away
  38. 1.739 km SSE of Mammoth, Wyoming · 2475 days ago · 5 km deep · 27 km away
  39. 1.7Wyoming · 2475 days ago · 5 km deep · 27 km away
  40. 2.039 km SSE of Mammoth, Wyoming · 2475 days ago · 5 km deep · 27 km away

Before

  1. 2.224 km SSW of Mammoth, Wyoming · 2535 days ago · 5 km deep · 1 km away
  2. 1.624 km SSW of Mammoth, Wyoming · 2535 days ago · 5 km deep · 1 km away
  3. 1.724 km SSW of Mammoth, Wyoming · 2535 days ago · 4 km deep · 1 km away
  4. 2.624 km SSW of Mammoth, Wyoming · 2535 days ago · 5 km deep · 1 km away
  5. 1.824 km SSW of Mammoth, Wyoming · 2535 days ago · 3 km deep · 1 km away
  6. 1.624 km SSW of Mammoth, Wyoming · 2535 days ago · 2 km deep · 1 km away
  7. 2.024 km SSW of Mammoth, Wyoming · 2535 days ago · 5 km deep · 2 km away
  8. 1.524 km SSW of Mammoth, Wyoming · 2535 days ago · 1 km deep · 0 km away
  9. 2.424 km SSW of Mammoth, Wyoming · 2535 days ago · 7 km deep · 2 km away
  10. 1.746 km SE of Mammoth, Wyoming · 2537 days ago · 2 km deep · 36 km away
  11. 2.314 km W of Livingston, Montana · 2538 days ago · 8 km deep · 100 km away · felt by 3
  12. 2.053 km SSE of Mammoth, Wyoming · 2543 days ago · 3 km deep · 39 km away
  13. 2.152 km SSE of Mammoth, Wyoming · 2543 days ago · 4 km deep · 39 km away
  14. 2.926 km SE of Mammoth, Wyoming · 2545 days ago · 8 km deep · 23 km away
  15. 1.67 km ESE of West Yellowstone, Montana · 2550 days ago · 11 km deep · 24 km away
  16. 2.143 km SSE of West Yellowstone, Montana · 2551 days ago · 5 km deep · 49 km away
  17. 1.743 km SSE of West Yellowstone, Montana · 2551 days ago · 6 km deep · 50 km away
  18. 2.543 km SSE of West Yellowstone, Montana · 2551 days ago · 5 km deep · 49 km away
  19. 2.143 km SSE of Mammoth, Wyoming · 2554 days ago · 6 km deep · 30 km away
  20. 1.948 km ESE of West Yellowstone, Montana · 2555 days ago · 4 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60347192. Read Mon, Oct 5, 2026, 2:35 AM UTC.