M1.6 earthquake 21 km SE of Mammoth, Wyoming

Magnitude

1.6 (ML, local (Richter)), micro

Magnitude from

University of Utah Seismograph Stations

Local time

Sun, Sep 18, 2016, 4:14 AM MDT

UTC

2016-09-18 10:14:25 UTC

Depth

1.9 km (1.2 mi), shallow

Epicenter

44.858° N, 110.488° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 3.7 km in depth

Magnitude uncertainty

±0.25

Depth from

From location

Station coverage gap

187°, poorly surrounded by stations

Stations used

11

• Gardiner, MontanaPopulation 875. Forecast26 kmSE
• Bozeman, MontanaPopulation 43,405. Forecast101 kmSSE
• Billings, MontanaPopulation 117,116. Forecast186 kmWSW
• Calgary, CanadaPopulation 1,306,784. Forecast739 kmSSE

After

1. 2.67 km SW of West Yellowstone, MontanaTue, Sep 20, 8:59 AM MDT · 3663 days ago · 9 km deep · 60 km away
2. 1.638 km SSE of West Yellowstone, MontanaSat, Sep 24, 5:13 AM MDT · 3660 days ago · 3 km deep · 62 km away
3. 2.35 km ESE of Hebgen Lake Estates, MontanaSun, Sep 25, 8:04 AM MDT · 3658 days ago · 11 km deep · 52 km away
4. 1.75 km ESE of Hebgen Lake Estates, MontanaSun, Sep 25, 9:29 AM MDT · 3658 days ago · 11 km deep · 52 km away
5. 2.85 km ESE of Hebgen Lake Estates, MontanaSun, Sep 25, 10:46 AM MDT · 3658 days ago · 11 km deep · 52 km away
6. 2.64 km ESE of Hebgen Lake Estates, MontanaSun, Sep 25, 11:50 AM MDT · 3658 days ago · 11 km deep · 52 km away
7. 1.65 km ESE of Hebgen Lake Estates, MontanaSun, Sep 25, 9:09 PM MDT · 3658 days ago · 11 km deep · 52 km away
8. 1.74 km ESE of Hebgen Lake Estates, MontanaSun, Sep 25, 10:39 PM MDT · 3658 days ago · 11 km deep · 52 km away
9. 2.257 km NNE of Kelly, WyomingMon, Sep 26, 1:28 AM MDT · 3658 days ago · 8 km deep · 84 km away
10. 2.5WyomingTue, Sep 27, 11:19 AM MDT · 3656 days ago · 7 km deep · 83 km away
11. 1.712 km E of West Yellowstone, MontanaWed, Sep 28, 2:48 AM MDT · 3656 days ago · 7 km deep · 42 km away
12. 2.226 km SSW of Mammoth, WyomingSat, Oct 1, 2:30 AM MDT · 3653 days ago · 7 km deep · 27 km away
13. 1.836 km E of West Yellowstone, MontanaMon, Oct 3, 2:20 AM MDT · 3651 days ago · 5 km deep · 27 km away
14. 1.837 km S of Silver Gate, MontanaMon, Oct 3, 10:57 AM MDT · 3650 days ago · 15 km deep · 44 km away
15. 2.237 km S of Silver Gate, MontanaMon, Oct 3, 2:15 PM MDT · 3650 days ago · 14 km deep · 43 km away
16. 2.339 km S of Silver Gate, MontanaMon, Oct 3, 2:21 PM MDT · 3650 days ago · 11 km deep · 44 km away
17. 1.639 km SE of Mammoth, WyomingWed, Oct 5, 1:10 PM MDT · 3648 days ago · 6 km deep · 20 km away
18. 2.110 km NNE of West Yellowstone, MontanaSat, Oct 8, 9:21 AM MDT · 3645 days ago · 7 km deep · 47 km away
19. 1.73 km NE of Hebgen Lake Estates, MontanaMon, Oct 10, 11:08 AM MDT · 3643 days ago · 11 km deep · 54 km away
20. 1.837 km S of Silver Gate, MontanaMon, Oct 10, 11:57 PM MDT · 3643 days ago · 15 km deep · 43 km away
21. 1.839 km S of Silver Gate, MontanaTue, Oct 11, 3:17 PM MDT · 3642 days ago · 11 km deep · 43 km away
22. 1.941 km SSE of Mammoth, WyomingSat, Oct 15, 12:51 AM MDT · 3639 days ago · 5 km deep · 24 km away
23. 1.532 km ESE of West Yellowstone, MontanaSun, Oct 16, 3:42 PM MDT · 3637 days ago · 8 km deep · 34 km away
24. 2.541 km SSE of Mammoth, WyomingThu, Oct 20, 4:49 PM MDT · 3633 days ago · 6 km deep · 23 km away
25. 2.2WyomingThu, Oct 20, 5:15 PM MDT · 3633 days ago · 6 km deep · 23 km away
26. 2.423 km ENE of Hebgen Lake Estates, MontanaFri, Oct 21, 10:02 AM MDT · 3632 days ago · 8 km deep · 33 km away
27. 2.031 km SSE of West Yellowstone, MontanaSat, Oct 22, 11:32 PM MDT · 3631 days ago · 8 km deep · 61 km away
28. 2.047 km SSE of Mammoth, WyomingSun, Oct 23, 2:48 PM MDT · 3630 days ago · 5 km deep · 29 km away
29. 2.047 km SSE of Mammoth, WyomingSun, Oct 23, 2:49 PM MDT · 3630 days ago · 2 km deep · 29 km away
30. 2.246 km SSE of Mammoth, WyomingSun, Oct 23, 2:49 PM MDT · 3630 days ago · 2 km deep · 29 km away
31. 1.747 km SSE of Mammoth, WyomingSun, Oct 23, 2:56 PM MDT · 3630 days ago · 4 km deep · 28 km away
32. 1.948 km SSE of Mammoth, WyomingSun, Oct 23, 2:56 PM MDT · 3630 days ago · 5 km deep · 29 km away
33. 1.847 km SSE of Mammoth, WyomingSun, Oct 23, 2:57 PM MDT · 3630 days ago · 3 km deep · 29 km away
34. 1.648 km SSE of Mammoth, WyomingSun, Oct 23, 3:01 PM MDT · 3630 days ago · 2 km deep · 29 km away
35. 1.647 km SSE of Mammoth, WyomingSun, Oct 23, 3:02 PM MDT · 3630 days ago · 3 km deep · 29 km away
36. 1.848 km SSE of Mammoth, WyomingSun, Oct 23, 3:03 PM MDT · 3630 days ago · 4 km deep · 29 km away
37. 1.948 km SSE of Mammoth, WyomingSun, Oct 23, 3:05 PM MDT · 3630 days ago · 4 km deep · 29 km away
38. 1.619 km NE of West Yellowstone, MontanaSun, Oct 23, 10:41 PM MDT · 3630 days ago · 6 km deep · 36 km away
39. 1.513 km NNE of West Yellowstone, MontanaSat, Oct 29, 11:49 AM MDT · 3624 days ago · 7 km deep · 43 km away
40. 1.834 km S of Silver Gate, MontanaSat, Oct 29, 2:27 PM MDT · 3624 days ago · 2 km deep · 40 km away
41. 1.733 km S of Silver Gate, MontanaSun, Oct 30, 12:42 PM MDT · 3623 days ago · 15 km deep · 42 km away
42. 1.549 km SE of West Yellowstone, MontanaMon, Oct 31, 9:55 AM MDT · 3622 days ago · 5 km deep · 55 km away
43. 1.843 km W of Hebgen Lake Estates, MontanaTue, Nov 1, 4:14 PM MDT · 3621 days ago · 11 km deep · 100 km away
44. 2.328 km W of Hebgen Lake Estates, MontanaFri, Nov 4, 10:07 AM MDT · 3618 days ago · 13 km deep · 84 km away · felt by 2
45. 1.740 km S of Silver Gate, MontanaFri, Nov 11, 8:38 PM MST · 3611 days ago · 8 km deep · 43 km away
46. 1.841 km ENE of Warm River, IdahoSun, Nov 13, 6:55 PM MST · 3609 days ago · 1 km deep · 74 km away
47. 1.725 km SE of Mammoth, WyomingTue, Nov 15, 3:25 AM MST · 3608 days ago · 5 km deep · 9 km away
48. 2.541 km SSE of West Yellowstone, MontanaTue, Nov 15, 4:48 PM MST · 3607 days ago · 11 km deep · 65 km away · felt by 1
49. 2.249 km SE of West Yellowstone, MontanaWed, Nov 16, 11:46 PM MST · 3606 days ago · 6 km deep · 58 km away
50. 1.749 km SE of West Yellowstone, MontanaWed, Nov 16, 11:56 PM MST · 3606 days ago · 7 km deep · 58 km away

Before

1. 1.625 km SSW of Mammoth, WyomingThu, Sep 15, 1:21 PM MDT · 3668 days ago · 8 km deep · 26 km away
2. 1.525 km SSW of Mammoth, WyomingThu, Sep 15, 12:35 PM MDT · 3668 days ago · 6 km deep · 26 km away
3. 1.624 km SSW of Mammoth, WyomingThu, Sep 15, 9:00 AM MDT · 3668 days ago · 7 km deep · 26 km away
4. 2.126 km SSW of Mammoth, WyomingThu, Sep 15, 8:47 AM MDT · 3668 days ago · 8 km deep · 27 km away
5. 1.614 km ENE of Hebgen Lake Estates, MontanaSun, Sep 11, 7:12 AM MDT · 3672 days ago · 10 km deep · 42 km away
6. 1.817 km S of Mammoth, WyomingThu, Sep 8, 7:13 AM MDT · 3675 days ago · 5 km deep · 18 km away
7. 1.86 km E of Hebgen Lake Estates, MontanaWed, Sep 7, 9:03 PM MDT · 3676 days ago · 9 km deep · 49 km away
8. 1.523 km SE of Mammoth, WyomingTue, Sep 6, 11:04 PM MDT · 3677 days ago · 11 km deep · 4 km away
9. 1.541 km SSE of Mammoth, WyomingMon, Sep 5, 3:53 PM MDT · 3678 days ago · 2 km deep · 23 km away
10. 2.441 km SSE of Mammoth, WyomingMon, Sep 5, 2:37 PM MDT · 3678 days ago · 6 km deep · 23 km away
11. 1.641 km SSE of Mammoth, WyomingMon, Sep 5, 2:21 PM MDT · 3678 days ago · 2 km deep · 23 km away
12. 1.73 km E of Hebgen Lake Estates, MontanaSun, Sep 4, 10:11 AM MDT · 3679 days ago · 8 km deep · 52 km away
13. 1.939 km SSE of Mammoth, WyomingSat, Sep 3, 11:54 PM MDT · 3680 days ago · 4 km deep · 22 km away
14. 1.740 km SSE of Mammoth, WyomingSat, Sep 3, 11:46 PM MDT · 3680 days ago · 6 km deep · 22 km away
15. 1.840 km SSE of Mammoth, WyomingSat, Sep 3, 11:43 PM MDT · 3680 days ago · 3 km deep · 22 km away
16. 1.646 km ESE of West Yellowstone, MontanaFri, Sep 2, 6:01 PM MDT · 3681 days ago · 4 km deep · 45 km away
17. 1.541 km SSE of Mammoth, WyomingFri, Sep 2, 7:47 AM MDT · 3681 days ago · 2 km deep · 23 km away
18. 2.041 km SSE of Mammoth, WyomingSat, Aug 27, 4:53 PM MDT · 3687 days ago · 5 km deep · 23 km away
19. 1.546 km SSE of Mammoth, WyomingFri, Aug 19, 6:15 AM MDT · 3696 days ago · 1 km deep · 28 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu60162027. Read Fri, Oct 2, 2026, 12:08 AM UTC.