M1.6 earthquake 22 km SSW of Mammoth, Wyoming

Magnitude

1.6 (ML, local (Richter)), micro

Magnitude from

University of Utah Seismograph Stations

Local time

Wed, Nov 21, 2018, 5:13 PM MST

UTC

2018-11-22 00:13:09 UTC

Depth

4.6 km (2.9 mi), shallow

Epicenter

44.784° N, 110.803° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.41

Depth from

From location

Station coverage gap

95°

Stations used

16

• West Yellowstone, MontanaPopulation 1,339. Forecast27 kmENE
• Bozeman, MontanaPopulation 43,405. Forecast101 kmS
• Billings, MontanaPopulation 117,116. Forecast212 kmWSW
• Calgary, CanadaPopulation 1,306,784. Forecast738 kmSSE

After

1. 2.124 km SSW of Mammoth, WyomingFri, Nov 23, 7:18 AM MST · 2871 days ago · 5 km deep · 2 km away
2. 2.325 km SSW of Mammoth, WyomingFri, Nov 23, 9:25 AM MST · 2871 days ago · 5 km deep · 3 km away
3. 1.924 km SSW of Mammoth, WyomingFri, Nov 23, 9:31 AM MST · 2871 days ago · 5 km deep · 2 km away
4. 1.623 km SSW of Mammoth, WyomingFri, Nov 23, 8:12 PM MST · 2871 days ago · 4 km deep · 2 km away
5. 1.648 km ESE of West Yellowstone, MontanaTue, Nov 27, 4:47 AM MST · 2867 days ago · 2 km deep · 39 km away
6. 1.722 km SSW of Mammoth, WyomingSat, Dec 8, 12:19 AM MST · 2857 days ago · 5 km deep · 3 km away
7. 1.746 km SE of Mammoth, WyomingMon, Dec 10, 2:30 AM MST · 2855 days ago · 4 km deep · 39 km away
8. 2.345 km SSE of Mammoth, WyomingThu, Dec 13, 11:54 PM MST · 2851 days ago · 5 km deep · 35 km away
9. 1.549 km ESE of West Yellowstone, MontanaFri, Dec 14, 4:49 AM MST · 2850 days ago · 2 km deep · 40 km away
10. 1.638 km WNW of Hebgen Lake Estates, MontanaSat, Dec 15, 11:48 PM MST · 2849 days ago · 11 km deep · 68 km away
11. 1.947 km ESE of West Yellowstone, MontanaTue, Dec 18, 3:40 AM MST · 2846 days ago · 4 km deep · 39 km away · felt by 1
12. 2.37 km N of West Yellowstone, MontanaTue, Dec 18, 12:06 PM MST · 2846 days ago · 12 km deep · 25 km away
13. 3.121 km W of Hebgen Lake Estates, MontanaThu, Dec 20, 9:36 AM MST · 2844 days ago · 16 km deep · 52 km away · felt by 1
14. 1.617 km NE of West Yellowstone, MontanaSun, Dec 23, 2:51 AM MST · 2842 days ago · 9 km deep · 11 km away
15. 1.817 km ESE of West Yellowstone, MontanaSun, Dec 23, 6:04 PM MST · 2841 days ago · 5 km deep · 21 km away
16. 1.6WyomingSun, Dec 23, 11:20 PM MST · 2841 days ago · 6 km deep · 21 km away
17. 1.612 km NE of West Yellowstone, MontanaMon, Dec 24, 11:14 AM MST · 2840 days ago · 7 km deep · 15 km away · felt by 1
18. 2.210 km NE of West Yellowstone, MontanaMon, Dec 24, 4:31 PM MST · 2840 days ago · 8 km deep · 19 km away
19. 1.6WyomingMon, Dec 31, 12:10 AM MST · 2834 days ago · 5 km deep · 34 km away
20. 1.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:11 AM MST · 2834 days ago · 6 km deep · 34 km away
21. 1.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:19 AM MST · 2834 days ago · 6 km deep · 34 km away
22. 1.847 km SSE of Mammoth, WyomingMon, Dec 31, 12:23 AM MST · 2834 days ago · 5 km deep · 34 km away
23. 2.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:25 AM MST · 2834 days ago · 5 km deep · 34 km away · felt by 2
24. 1.748 km SSE of Mammoth, WyomingMon, Dec 31, 12:26 AM MST · 2834 days ago · 6 km deep · 35 km away
25. 1.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:27 AM MST · 2834 days ago · 3 km deep · 33 km away
26. 1.647 km SSE of Mammoth, WyomingMon, Dec 31, 12:28 AM MST · 2834 days ago · 2 km deep · 33 km away
27. 2.247 km SSE of Mammoth, WyomingMon, Dec 31, 12:28 AM MST · 2834 days ago · 4 km deep · 34 km away
28. 2.048 km SSE of Mammoth, WyomingMon, Dec 31, 12:29 AM MST · 2834 days ago · 2 km deep · 34 km away
29. 2.047 km SSE of Mammoth, WyomingMon, Dec 31, 12:30 AM MST · 2834 days ago · 5 km deep · 34 km away
30. 1.948 km SSE of Mammoth, WyomingMon, Dec 31, 12:30 AM MST · 2834 days ago · 2 km deep · 34 km away
31. 2.347 km SSE of Mammoth, WyomingMon, Dec 31, 12:31 AM MST · 2834 days ago · 5 km deep · 34 km away
32. 1.648 km SSE of Mammoth, WyomingMon, Dec 31, 12:48 AM MST · 2834 days ago · 6 km deep · 35 km away
33. 2.448 km SSE of Mammoth, WyomingMon, Dec 31, 2:57 AM MST · 2834 days ago · 5 km deep · 34 km away
34. 2.047 km SSE of Mammoth, WyomingMon, Dec 31, 3:00 AM MST · 2834 days ago · 5 km deep · 34 km away
35. 2.047 km SSE of Mammoth, WyomingMon, Dec 31, 3:08 AM MST · 2834 days ago · 6 km deep · 34 km away
36. 1.6WyomingMon, Dec 31, 3:14 AM MST · 2834 days ago · 4 km deep · 34 km away
37. 1.548 km SSE of Mammoth, WyomingMon, Dec 31, 3:16 AM MST · 2834 days ago · 5 km deep · 34 km away
38. 1.749 km SSE of Mammoth, WyomingMon, Dec 31, 3:16 AM MST · 2834 days ago · 16 km deep · 38 km away
39. 2.647 km SSE of Mammoth, WyomingMon, Dec 31, 3:21 AM MST · 2833 days ago · 5 km deep · 34 km away
40. 2.848 km SSE of Mammoth, WyomingMon, Dec 31, 3:21 AM MST · 2833 days ago · 3 km deep · 34 km away · felt by 1
41. 1.648 km SSE of Mammoth, WyomingMon, Dec 31, 3:50 AM MST · 2833 days ago · 5 km deep · 35 km away
42. 1.812 km E of Hebgen Lake Estates, MontanaWed, Jan 2, 7:58 PM MST · 2831 days ago · 9 km deep · 18 km away
43. 1.938 km SSE of Mammoth, WyomingFri, Jan 4, 2:42 PM MST · 2829 days ago · 5 km deep · 29 km away
44. 2.434 km SW of Silver Gate, MontanaSat, Jan 5, 10:35 PM MST · 2828 days ago · 9 km deep · 45 km away · felt by 1
45. 2.033 km SW of Silver Gate, MontanaSat, Jan 5, 10:36 PM MST · 2828 days ago · 8 km deep · 45 km away
46. 2.334 km SW of Silver Gate, MontanaSat, Jan 5, 10:38 PM MST · 2828 days ago · 8 km deep · 45 km away
47. 2.834 km SW of Silver Gate, MontanaSat, Jan 5, 10:38 PM MST · 2828 days ago · 9 km deep · 45 km away · felt by 1
48. 2.636 km SW of Silver Gate, MontanaSat, Jan 5, 10:39 PM MST · 2828 days ago · 2 km deep · 44 km away
49. 2.634 km SW of Silver Gate, MontanaSat, Jan 5, 10:39 PM MST · 2828 days ago · 7 km deep · 45 km away
50. 2.830 km SW of Silver Gate, MontanaSat, Jan 5, 10:39 PM MST · 2828 days ago · 6 km deep · 45 km away
51. 1.739 km SSE of Mammoth, WyomingMon, Jan 7, 12:15 AM MST · 2827 days ago · 3 km deep · 31 km away
52. 2.451 km SSW of Silver Gate, MontanaSun, Jan 13, 12:39 AM MST · 2821 days ago · 6 km deep · 44 km away
53. 1.939 km SSE of Mammoth, WyomingTue, Jan 15, 4:44 AM MST · 2818 days ago · 5 km deep · 30 km away
54. 2.039 km SSE of Mammoth, WyomingTue, Jan 15, 4:50 AM MST · 2818 days ago · 7 km deep · 30 km away
55. 1.639 km SSE of Mammoth, WyomingTue, Jan 15, 5:12 AM MST · 2818 days ago · 3 km deep · 29 km away
56. 2.449 km SE of West Yellowstone, MontanaTue, Jan 15, 9:52 AM MST · 2818 days ago · 6 km deep · 48 km away · felt by 1
57. 2.014 km SE of West Yellowstone, MontanaThu, Jan 17, 12:26 AM MST · 2817 days ago · 13 km deep · 27 km away

Before

1. 1.83 km SSE of Hebgen Lake Estates, MontanaTue, Nov 20, 2:03 AM MST · 2875 days ago · 12 km deep · 29 km away
2. 1.611 km NNE of West Yellowstone, MontanaMon, Nov 12, 3:25 AM MST · 2882 days ago · 7 km deep · 18 km away
3. 1.847 km SE of Mammoth, WyomingThu, Nov 8, 11:12 PM MST · 2886 days ago · 2 km deep · 39 km away
4. 1.63 km ENE of Hebgen Lake Estates, MontanaThu, Nov 8, 2:47 AM MST · 2887 days ago · 11 km deep · 28 km away
5. 2.47 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 10:11 AM MST · 2890 days ago · 11 km deep · 24 km away
6. 1.87 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 9:58 AM MST · 2890 days ago · 11 km deep · 24 km away
7. 2.08 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 9:46 AM MST · 2890 days ago · 10 km deep · 23 km away
8. 1.78 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 9:46 AM MST · 2890 days ago · 10 km deep · 23 km away
9. 1.67 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 9:14 AM MST · 2890 days ago · 9 km deep · 23 km away
10. 1.88 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 9:13 AM MST · 2890 days ago · 9 km deep · 22 km away
11. 1.58 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 9:07 AM MST · 2890 days ago · 10 km deep · 23 km away
12. 1.97 km ENE of Hebgen Lake Estates, MontanaSun, Nov 4, 8:54 AM MST · 2890 days ago · 12 km deep · 24 km away
13. 2.026 km ESE of West Yellowstone, MontanaTue, Oct 30, 6:35 PM MDT · 2895 days ago · 9 km deep · 21 km away
14. 1.646 km SE of West Yellowstone, MontanaWed, Oct 24, 4:56 PM MDT · 2901 days ago · 3 km deep · 46 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu60305327. Read Sat, Oct 3, 2026, 9:48 PM UTC.