Wyoming earthquakes

M1.9 earthquake 29 km ENE of Alta, Wyoming

A magnitude 1.9 earthquake struck 29 km ENE of Alta, Wyoming on Mon, Mar 8, 2021, 7:08 PM MST (02:08 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.2 28 km SE of Mammoth, Wyoming. This one was a foreshock.

Driggs 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
2021-03-09 02:08:15 UTC
Depth
10.1 km (6.2 mi), shallow
Epicenter
43.895° N, 110.719° 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 0.6 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.45
Depth from
From location
Station coverage gap
152°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.817 km ESE of West Yellowstone, Montana · 2035 days ago · 12 km deep · 78 km away
  2. 1.539 km SSE of Mammoth, Wyoming · 2035 days ago · 4 km deep · 88 km away
  3. 1.517 km ESE of West Yellowstone, Montana · 2035 days ago · 12 km deep · 78 km away
  4. 2.115 km NE of West Yellowstone, Montana · 2033 days ago · 9 km deep · 98 km away
  5. 2.125 km S of Mammoth, Wyoming · 2032 days ago · 3 km deep · 95 km away
  6. 1.833 km E of West Yellowstone, Montana · 2027 days ago · 6 km deep · 81 km away
  7. 1.822 km SSW of Mammoth, Wyoming · 2025 days ago · 4 km deep · 99 km away
  8. 1.923 km SSW of Mammoth, Wyoming · 2025 days ago · 4 km deep · 98 km away
  9. 1.731 km SSE of Mammoth, Wyoming · 2018 days ago · 3 km deep · 96 km away
  10. 1.830 km ESE of West Yellowstone, Montana · 2014 days ago · 5 km deep · 69 km away
  11. 1.625 km SSE of Mammoth, Wyoming · 2005 days ago · 3 km deep · 96 km away
  12. 1.66 km NW of Wilson, Wyoming · 2001 days ago · 1 km deep · 43 km away
  13. 2.228 km SE of Mammoth, Wyoming · 1992 days ago · 5 km deep · 99 km away
  14. 2.165 km NNE of Kelly, Wyoming · 1987 days ago · 10 km deep · 44 km away
  15. 2.2southern Idaho · 1979 days ago · 10 km deep · 78 km away · felt by 1
  16. 1.518 km ENE of West Yellowstone, Montana · 1977 days ago · 8 km deep · 95 km away

Before

  1. 1.639 km SE of Mammoth, Wyoming · 2039 days ago · 4 km deep · 92 km away
  2. 1.613 km SE of West Yellowstone, Montana · 2043 days ago · 11 km deep · 80 km away
  3. 3.617 km ESE of Kelly, Wyoming · 2049 days ago · 8 km deep · 42 km away · felt by 6
  4. 1.626 km SSE of West Yellowstone, Montana · 2056 days ago · 8 km deep · 65 km away
  5. 2.112 km W of Wilson, Wyoming · 2058 days ago · 9 km deep · 50 km away
  6. 1.710 km SSE of Victor, Idaho · 2059 days ago · 2 km deep · 50 km away
  7. 1.958 km SSE of Mammoth, Wyoming · 2059 days ago · 2 km deep · 71 km away
  8. 2.21 km SSW of West Yellowstone, Montana · 2064 days ago · 10 km deep · 90 km away · felt by 1

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80490709. Read Sun, Oct 4, 2026, 11:55 PM UTC.