Wyoming earthquakes

M1.9 earthquake 36 km NE of Bondurant, Wyoming

A magnitude 1.9 earthquake struck 36 km NE of Bondurant, Wyoming on Sat, Sep 25, 2021, 9:40 AM MDT (15:40 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.5 33 km SSW of Dubois, Wyoming. This one was a foreshock.

Dubois forecastMore in Wyoming

Map

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

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The earthquake

Magnitude
1.9 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2021-09-25 15:40:46 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
43.405° N, 110.061° W
Region
Wyoming
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 1.2 km horizontally, 15.1 km in depth
Magnitude uncertainty
±0.33
Depth from
Operator assigned
Station coverage gap
158°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 2.410 km ENE of Alta, Wyoming · 1821 days ago · 11 km deep · 81 km away · felt by 2
  2. 1.610 km ENE of Alta, Wyoming · 1818 days ago · 10 km deep · 81 km away
  3. 1.79 km ENE of Alta, Wyoming · 1816 days ago · 11 km deep · 82 km away
  4. 1.946 km NE of Alta, Wyoming · 1804 days ago · 10 km deep · 90 km away
  5. 1.624 km ESE of Kelly, Wyoming · 1793 days ago · 3 km deep · 27 km away
  6. 1.833 km SSW of Dubois, Wyoming · 1793 days ago · 6 km deep · 30 km away
  7. 1.517 km ENE of Bondurant, Wyoming · 1791 days ago · 6 km deep · 20 km away
  8. 2.546 km NE of Alta, Wyoming · 1789 days ago · 10 km deep · 90 km away · felt by 1
  9. 2.246 km NE of Alta, Wyoming · 1789 days ago · 7 km deep · 89 km away
  10. 2.029 km ESE of Kelly, Wyoming · 1788 days ago · 8 km deep · 22 km away
  11. 1.846 km NE of Alta, Wyoming · 1786 days ago · 10 km deep · 89 km away
  12. 2.533 km SSW of Dubois, Wyoming · 1786 days ago · 10 km deep · 30 km away
  13. 2.211 km E of Kelly, Wyoming · 1783 days ago · 6 km deep · 41 km away
  14. 1.99 km W of Bondurant, Wyoming · 1780 days ago · 10 km deep · 44 km away
  15. 2.011 km WSW of Bondurant, Wyoming · 1780 days ago · 4 km deep · 48 km away
  16. 1.532 km ESE of Kelly, Wyoming · 1777 days ago · 5 km deep · 20 km away
  17. 2.0Wyoming · 1777 days ago · 0 km deep · 66 km away
  18. 1.99 km W of Bondurant, Wyoming · 1777 days ago · 8 km deep · 45 km away

Before

  1. 2.17 km SSE of Hoback, Wyoming · 1845 days ago · 6 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80524554. Read Sun, Oct 4, 2026, 2:35 PM UTC.