Montana earthquakes

M1.6 earthquake 17 km NNW of Ennis, Montana

A magnitude 1.6 earthquake struck 17 km NNW of Ennis, Montana on Thu, Mar 11, 2021, 5:52 AM MST (12:52 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M2.4 27 km WNW of Hebgen Lake Estates, Montana. This one was a foreshock.

Ennis forecastMore in Montana

Map

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

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The earthquake

Magnitude
1.6 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2021-03-11 12:52:57 UTC
Depth
8.8 km (5.4 mi), shallow
Epicenter
45.491° N, 111.828° 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, 0.6 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
87°
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: 19 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 1.627 km WNW of Hebgen Lake Estates, Montana · 2031 days ago · 12 km deep · 78 km away
  2. 1.628 km WNW of Hebgen Lake Estates, Montana · 2031 days ago · 13 km deep · 77 km away
  3. 2.427 km WNW of Hebgen Lake Estates, Montana · 2030 days ago · 13 km deep · 78 km away
  4. 1.75 km ENE of Logan, Montana · 2021 days ago · 4 km deep · 59 km away
  5. 1.62 km E of Logan, Montana · 2017 days ago · 12 km deep · 55 km away
  6. 1.87 km W of Sheridan, Montana · 2009 days ago · 10 km deep · 36 km away
  7. 2.029 km SSE of Virginia City, Montana · 2007 days ago · 3 km deep · 49 km away
  8. 1.815 km NE of Dillon, Montana · 2003 days ago · 6 km deep · 56 km away
  9. 1.51 km ENE of Toston, Montana · 2003 days ago · 1 km deep · 82 km away
  10. 2.210 km NE of Toston, Montana · 1999 days ago · 1 km deep · 91 km away
  11. 2.036 km NNE of Spencer, Idaho · 1998 days ago · 3 km deep · 93 km away
  12. 1.615 km SW of Radersburg, Montana · 1989 days ago · 6 km deep · 68 km away
  13. 1.914 km SW of Radersburg, Montana · 1989 days ago · 7 km deep · 70 km away
  14. 1.914 km SW of Radersburg, Montana · 1989 days ago · 5 km deep · 70 km away
  15. 2.341 km NW of Island Park, Idaho · 1988 days ago · 15 km deep · 91 km away
  16. 2.23 km NW of Alder, Montana · 1977 days ago · 11 km deep · 29 km away
  17. 2.14 km NNW of Alder, Montana · 1977 days ago · 4 km deep · 27 km away
  18. 1.73 km NW of Alder, Montana · 1977 days ago · 9 km deep · 29 km away
  19. 1.52 km NW of Alder, Montana · 1977 days ago · 11 km deep · 29 km away

Before

  1. 2.119 km W of Pony, Montana · 2036 days ago · 5 km deep · 33 km away
  2. 1.632 km S of Ennis, Montana · 2036 days ago · 8 km deep · 50 km away
  3. 1.87 km WSW of Willow Creek, Montana · 2037 days ago · 2 km deep · 35 km away
  4. 1.9Western Montana · 2040 days ago · 6 km deep · 59 km away
  5. 1.69 km SW of Radersburg, Montana · 2046 days ago · 4 km deep · 71 km away
  6. 1.623 km WNW of Hebgen Lake Estates, Montana · 2047 days ago · 9 km deep · 76 km away
  7. 2.022 km WNW of Hebgen Lake Estates, Montana · 2047 days ago · 10 km deep · 77 km away
  8. 2.723 km ESE of Dillon, Montana · 2049 days ago · 7 km deep · 56 km away
  9. 1.623 km ESE of Dillon, Montana · 2053 days ago · 5 km deep · 58 km away
  10. 1.96 km E of Willow Creek, Montana · 2054 days ago · 5 km deep · 43 km away
  11. 2.11 km SSE of Townsend, Montana · 2055 days ago · 6 km deep · 93 km away
  12. 2.616 km NE of Lima, Montana · 2055 days ago · 11 km deep · 96 km away
  13. 1.846 km NNE of Spencer, Idaho · 2057 days ago · 5 km deep · 83 km away
  14. 1.87 km WSW of Jefferson City, Montana · 2058 days ago · 4 km deep · 100 km away
  15. 1.57 km ENE of Townsend, Montana · 2059 days ago · 4 km deep · 99 km away
  16. 1.68 km ENE of Townsend, Montana · 2060 days ago · 7 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80490944. Read Mon, Oct 5, 2026, 7:40 AM UTC.