Montana earthquakes

M1.7 earthquake 50 km SE of Mammoth, Wyoming

A magnitude 1.7 earthquake struck 50 km SE of Mammoth, Wyoming on Thu, Aug 27, 2015, 2:13 AM MDT (08:13 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.4 24 km SSE of West Yellowstone, 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
2015-08-27 08:13:16 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
44.603° N, 110.328° 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 0.3 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
90°
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: 21 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.59 km WSW of South Glastonbury, Montana · 4056 days ago · 8 km deep · 91 km away
  2. 2.233 km ESE of West Yellowstone, Montana · 4052 days ago · 6 km deep · 29 km away
  3. 1.733 km ESE of West Yellowstone, Montana · 4052 days ago · 5 km deep · 29 km away
  4. 1.930 km ESE of West Yellowstone, Montana · 4041 days ago · 7 km deep · 33 km away
  5. 2.017 km S of West Yellowstone, Montana · 4038 days ago · 16 km deep · 60 km away · felt by 1
  6. 2.024 km SSE of West Yellowstone, Montana · 4029 days ago · 4 km deep · 53 km away
  7. 1.69 km E of Hebgen Lake Estates, Montana · 4028 days ago · 12 km deep · 61 km away
  8. 1.547 km ESE of West Yellowstone, Montana · 4023 days ago · 3 km deep · 23 km away
  9. 1.853 km SE of West Yellowstone, Montana · 4023 days ago · 2 km deep · 32 km away
  10. 1.853 km SE of West Yellowstone, Montana · 4023 days ago · 1 km deep · 32 km away
  11. 1.734 km ESE of West Yellowstone, Montana · 4019 days ago · 6 km deep · 28 km away
  12. 1.849 km SSW of Silver Gate, Montana · 4018 days ago · 5 km deep · 4 km away
  13. 1.629 km SE of Mammoth, Wyoming · 4013 days ago · 5 km deep · 21 km away
  14. 1.53 km SE of Hebgen Lake Estates, Montana · 4010 days ago · 9 km deep · 68 km away
  15. 1.924 km SSE of West Yellowstone, Montana · 4010 days ago · 16 km deep · 56 km away
  16. 2.424 km SSE of West Yellowstone, Montana · 4010 days ago · 8 km deep · 56 km away · felt by 1
  17. 2.13 km ENE of Hebgen Lake Estates, Montana · 4009 days ago · 14 km deep · 68 km away
  18. 1.924 km SE of Mammoth, Wyoming · 4008 days ago · 2 km deep · 27 km away
  19. 1.734 km ESE of West Yellowstone, Montana · 4006 days ago · 7 km deep · 28 km away
  20. 2.047 km SE of Mammoth, Wyoming · 4006 days ago · 3 km deep · 4 km away
  21. 2.439 km S of Silver Gate, Montana · 4004 days ago · 11 km deep · 25 km away

Before

  1. 1.833 km E of West Yellowstone, Montana · 4059 days ago · 4 km deep · 28 km away
  2. 1.726 km W of Hebgen Lake Estates, Montana · 4061 days ago · 10 km deep · 97 km away
  3. 1.543 km SE of West Yellowstone, Montana · 4062 days ago · 8 km deep · 45 km away
  4. 1.954 km SSE of Mammoth, Wyoming · 4064 days ago · 5 km deep · 7 km away
  5. 1.735 km E of West Yellowstone, Montana · 4070 days ago · 6 km deep · 27 km away
  6. 1.825 km SE of Mammoth, Wyoming · 4073 days ago · 7 km deep · 25 km away
  7. 2.329 km WNW of Hebgen Lake Estates, Montana · 4074 days ago · 7 km deep · 100 km away
  8. 1.570 km NNE of Kelly, Wyoming · 4076 days ago · 10 km deep · 46 km away
  9. 1.629 km ESE of Island Park, Idaho · 4077 days ago · 12 km deep · 60 km away
  10. 1.516 km SSE of West Yellowstone, Montana · 4086 days ago · 13 km deep · 54 km away
  11. 1.716 km SSE of West Yellowstone, Montana · 4086 days ago · 14 km deep · 55 km away
  12. 1.916 km SSE of West Yellowstone, Montana · 4086 days ago · 15 km deep · 55 km away
  13. 1.816 km SSE of West Yellowstone, Montana · 4086 days ago · 13 km deep · 55 km away
  14. 1.616 km SSE of West Yellowstone, Montana · 4086 days ago · 14 km deep · 55 km away
  15. 1.716 km SSE of West Yellowstone, Montana · 4086 days ago · 13 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60121322. Read Mon, Oct 5, 2026, 3:29 AM UTC.