Montana earthquakes

M1.7 earthquake 23 km SSW of Mammoth, Wyoming

A magnitude 1.7 earthquake struck 23 km SSW of Mammoth, Wyoming on Wed, Jul 8, 2015, 10:59 PM MDT (04:59 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.4 32 km W of Hebgen Lake Estates, Montana. 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
2015-07-09 04:59:39 UTC
Depth
10.2 km (6.3 mi), shallow
Epicenter
44.777° N, 110.793° 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 0.8 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.28
Depth from
From location
Station coverage gap
74°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 18 in the 30 days before it.

After

  1. 1.625 km W of Hebgen Lake Estates, Montana · 4105 days ago · 1 km deep · 57 km away
  2. 1.833 km SSE of Mammoth, Wyoming · 4103 days ago · 2 km deep · 24 km away
  3. 2.132 km SSE of Mammoth, Wyoming · 4103 days ago · 2 km deep · 24 km away
  4. 1.94 km WSW of Hebgen Lake Estates, Montana · 4097 days ago · 14 km deep · 35 km away
  5. 1.922 km NE of West Yellowstone, Montana · 4095 days ago · 5 km deep · 8 km away
  6. 1.850 km SE of West Yellowstone, Montana · 4093 days ago · 2 km deep · 46 km away
  7. 1.751 km SE of West Yellowstone, Montana · 4093 days ago · 2 km deep · 46 km away
  8. 1.716 km SSE of West Yellowstone, Montana · 4086 days ago · 13 km deep · 32 km away
  9. 1.616 km SSE of West Yellowstone, Montana · 4086 days ago · 14 km deep · 32 km away
  10. 1.816 km SSE of West Yellowstone, Montana · 4086 days ago · 13 km deep · 32 km away
  11. 1.916 km SSE of West Yellowstone, Montana · 4085 days ago · 15 km deep · 32 km away
  12. 1.716 km SSE of West Yellowstone, Montana · 4085 days ago · 14 km deep · 32 km away
  13. 1.516 km SSE of West Yellowstone, Montana · 4085 days ago · 13 km deep · 32 km away
  14. 1.539 km NNE of Spencer, Idaho · 4077 days ago · 8 km deep · 90 km away
  15. 1.629 km ESE of Island Park, Idaho · 4077 days ago · 12 km deep · 49 km away
  16. 1.570 km NNE of Kelly, Wyoming · 4076 days ago · 10 km deep · 78 km away
  17. 2.329 km WNW of Hebgen Lake Estates, Montana · 4074 days ago · 7 km deep · 60 km away
  18. 1.825 km SE of Mammoth, Wyoming · 4072 days ago · 7 km deep · 24 km away
  19. 1.735 km E of West Yellowstone, Montana · 4069 days ago · 6 km deep · 20 km away
  20. 1.954 km SSE of Mammoth, Wyoming · 4063 days ago · 5 km deep · 42 km away
  21. 1.543 km SE of West Yellowstone, Montana · 4061 days ago · 8 km deep · 47 km away
  22. 1.726 km W of Hebgen Lake Estates, Montana · 4061 days ago · 10 km deep · 58 km away
  23. 1.530 km WNW of Hebgen Lake Estates, Montana · 4059 days ago · 7 km deep · 61 km away
  24. 1.833 km E of West Yellowstone, Montana · 4059 days ago · 4 km deep · 18 km away
  25. 3.432 km W of Hebgen Lake Estates, Montana · 4059 days ago · 11 km deep · 63 km away
  26. 1.750 km SE of Mammoth, Wyoming · 4057 days ago · 5 km deep · 42 km away
  27. 1.59 km WSW of South Glastonbury, Montana · 4056 days ago · 8 km deep · 60 km away
  28. 2.233 km ESE of West Yellowstone, Montana · 4051 days ago · 6 km deep · 23 km away
  29. 1.733 km ESE of West Yellowstone, Montana · 4051 days ago · 5 km deep · 24 km away

Before

  1. 1.541 km S of Virginia City, Montana · 4106 days ago · 10 km deep · 100 km away
  2. 1.931 km ESE of West Yellowstone, Montana · 4110 days ago · 2 km deep · 23 km away
  3. 1.612 km NNW of Hebgen Lake Estates, Montana · 4110 days ago · 3 km deep · 38 km away
  4. 1.750 km W of Hebgen Lake Estates, Montana · 4111 days ago · 0 km deep · 81 km away
  5. 2.148 km W of Hebgen Lake Estates, Montana · 4111 days ago · 7 km deep · 80 km away
  6. 1.925 km SE of Mammoth, Wyoming · 4119 days ago · 5 km deep · 22 km away
  7. 1.738 km SSE of Mammoth, Wyoming · 4119 days ago · 5 km deep · 29 km away
  8. 1.720 km SSE of Mammoth, Wyoming · 4122 days ago · 3 km deep · 15 km away
  9. 2.529 km E of West Yellowstone, Montana · 4123 days ago · 8 km deep · 16 km away
  10. 1.8Wyoming · 4124 days ago · 2 km deep · 15 km away
  11. 1.935 km E of West Yellowstone, Montana · 4125 days ago · 2 km deep · 19 km away
  12. 1.6Wyoming · 4125 days ago · 5 km deep · 20 km away
  13. 1.548 km SE of West Yellowstone, Montana · 4130 days ago · 4 km deep · 47 km away
  14. 1.848 km SE of West Yellowstone, Montana · 4131 days ago · 4 km deep · 47 km away
  15. 2.448 km SE of West Yellowstone, Montana · 4131 days ago · 4 km deep · 47 km away
  16. 1.624 km SSE of West Yellowstone, Montana · 4132 days ago · 5 km deep · 38 km away
  17. 1.519 km NE of West Yellowstone, Montana · 4134 days ago · 8 km deep · 9 km away
  18. 1.735 km SSE of Virginia City, Montana · 4135 days ago · 7 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60116902. Read Sun, Oct 4, 2026, 8:32 PM UTC.