M1.6 earthquake 32 km S of Ennis, Montana

Magnitude

1.6 (ML, local (Richter)), micro

Magnitude from

Montana Bureau of Mines and Geology

Local time

Mon, Mar 8, 2021, 9:17 PM MST

UTC

2021-03-09 04:17:22 UTC

Depth

7.9 km (4.9 mi), shallow

Epicenter

45.060° N, 111.659° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 2.4 km in depth

Magnitude uncertainty

±0.26

Depth from

From location

Station coverage gap

63°

Stations used

19

• Ennis, MontanaPopulation 884. Forecast33 kmS
• Bozeman, MontanaPopulation 43,405. Forecast84 kmSW
• Billings, MontanaPopulation 117,116. Forecast259 kmWSW
• Calgary, CanadaPopulation 1,306,784. Forecast690 kmSSE

After

1. 2.119 km W of Pony, MontanaTue, Mar 9, 3:17 AM MST · 2036 days ago · 5 km deep · 79 km away
2. 1.817 km ESE of West Yellowstone, MontanaTue, Mar 9, 2:29 PM MST · 2035 days ago · 12 km deep · 79 km away
3. 1.517 km ESE of West Yellowstone, MontanaTue, Mar 9, 6:14 PM MST · 2035 days ago · 12 km deep · 79 km away
4. 1.617 km NNW of Ennis, MontanaThu, Mar 11, 5:52 AM MST · 2034 days ago · 9 km deep · 50 km away
5. 1.627 km SE of Mammoth, WyomingThu, Mar 11, 3:35 PM MST · 2033 days ago · 9 km deep · 99 km away
6. 2.115 km NE of West Yellowstone, MontanaThu, Mar 11, 6:20 PM MST · 2033 days ago · 9 km deep · 64 km away
7. 2.125 km S of Mammoth, WyomingFri, Mar 12, 10:27 PM MST · 2032 days ago · 3 km deep · 85 km away
8. 1.627 km WNW of Hebgen Lake Estates, MontanaSat, Mar 13, 4:45 PM MST · 2031 days ago · 12 km deep · 28 km away
9. 1.628 km WNW of Hebgen Lake Estates, MontanaSun, Mar 14, 9:42 AM MDT · 2030 days ago · 13 km deep · 27 km away
10. 2.427 km WNW of Hebgen Lake Estates, MontanaMon, Mar 15, 4:09 AM MDT · 2030 days ago · 13 km deep · 28 km away
11. 1.833 km E of West Yellowstone, MontanaWed, Mar 17, 11:41 AM MDT · 2027 days ago · 6 km deep · 91 km away
12. 1.822 km SSW of Mammoth, WyomingFri, Mar 19, 9:13 AM MDT · 2025 days ago · 4 km deep · 75 km away
13. 1.923 km SSW of Mammoth, WyomingFri, Mar 19, 5:00 PM MDT · 2025 days ago · 4 km deep · 75 km away
14. 1.75 km ENE of Logan, MontanaTue, Mar 23, 11:16 PM MDT · 2021 days ago · 4 km deep · 97 km away
15. 1.731 km SSE of Mammoth, WyomingFri, Mar 26, 5:09 PM MDT · 2018 days ago · 3 km deep · 99 km away
16. 1.62 km E of Logan, MontanaSun, Mar 28, 3:13 AM MDT · 2017 days ago · 12 km deep · 94 km away
17. 1.63 km ENE of Lima, MontanaMon, Mar 29, 2:36 AM MDT · 2016 days ago · 6 km deep · 84 km away
18. 1.830 km ESE of West Yellowstone, MontanaWed, Mar 31, 2:56 AM MDT · 2014 days ago · 5 km deep · 92 km away
19. 1.87 km W of Sheridan, MontanaMon, Apr 5, 4:01 AM MDT · 2009 days ago · 10 km deep · 67 km away
20. 2.029 km SSE of Virginia City, MontanaWed, Apr 7, 4:35 AM MDT · 2007 days ago · 3 km deep · 10 km away
21. 1.625 km SSE of Mammoth, WyomingThu, Apr 8, 7:24 AM MDT · 2006 days ago · 3 km deep · 88 km away
22. 1.815 km NE of Dillon, MontanaSun, Apr 11, 12:18 AM MDT · 2003 days ago · 6 km deep · 72 km away
23. 2.036 km NNE of Spencer, IdahoFri, Apr 16, 12:06 AM MDT · 1998 days ago · 3 km deep · 52 km away
24. 2.228 km SE of Mammoth, WyomingWed, Apr 21, 10:38 AM MDT · 1992 days ago · 5 km deep · 98 km away
25. 2.341 km NW of Island Park, IdahoSun, Apr 25, 9:36 PM MDT · 1988 days ago · 15 km deep · 43 km away
26. 2.523 km NE of West Yellowstone, MontanaTue, Apr 27, 3:07 AM MDT · 1987 days ago · 11 km deep · 66 km away
27. 1.518 km ENE of West Yellowstone, MontanaThu, May 6, 10:15 PM MDT · 1977 days ago · 8 km deep · 69 km away
28. 2.23 km NW of Alder, MontanaFri, May 7, 6:54 AM MDT · 1977 days ago · 11 km deep · 49 km away
29. 2.14 km NNW of Alder, MontanaFri, May 7, 6:54 AM MDT · 1977 days ago · 4 km deep · 50 km away
30. 1.73 km NW of Alder, MontanaFri, May 7, 7:03 AM MDT · 1977 days ago · 9 km deep · 49 km away
31. 1.52 km NW of Alder, MontanaFri, May 7, 9:17 AM MDT · 1976 days ago · 11 km deep · 49 km away

Before

1. 1.87 km WSW of Willow Creek, MontanaMon, Mar 8, 9:11 AM MST · 2036 days ago · 2 km deep · 82 km away
2. 2.426 km SE of Mammoth, WyomingWed, Mar 3, 2:31 PM MST · 2041 days ago · 8 km deep · 99 km away
3. 1.613 km SE of West Yellowstone, MontanaMon, Mar 1, 2:42 PM MST · 2043 days ago · 11 km deep · 75 km away
4. 1.623 km WNW of Hebgen Lake Estates, MontanaFri, Feb 26, 8:25 AM MST · 2046 days ago · 9 km deep · 28 km away
5. 2.022 km WNW of Hebgen Lake Estates, MontanaFri, Feb 26, 5:50 AM MST · 2047 days ago · 10 km deep · 28 km away
6. 2.723 km ESE of Dillon, MontanaTue, Feb 23, 11:11 PM MST · 2049 days ago · 7 km deep · 55 km away
7. 1.623 km ESE of Dillon, MontanaSat, Feb 20, 10:01 AM MST · 2052 days ago · 5 km deep · 56 km away
8. 1.96 km E of Willow Creek, MontanaFri, Feb 19, 8:26 AM MST · 2053 days ago · 5 km deep · 85 km away
9. 2.616 km NE of Lima, MontanaWed, Feb 17, 2:04 PM MST · 2055 days ago · 11 km deep · 70 km away
10. 1.626 km SSE of West Yellowstone, MontanaTue, Feb 16, 4:45 PM MST · 2056 days ago · 8 km deep · 88 km away
11. 1.846 km NNE of Spencer, IdahoMon, Feb 15, 9:38 PM MST · 2057 days ago · 5 km deep · 42 km away
12. 2.21 km SSW of West Yellowstone, MontanaTue, Feb 9, 12:18 AM MST · 2064 days ago · 10 km deep · 63 km away · felt by 1

From the USGS Earthquake Hazards Program and its partner networks, event mb80490719. Read Mon, Oct 5, 2026, 1:34 AM UTC.