M2.4 earthquake 48 km SSE of Mammoth, Wyoming

Magnitude

2.4 (ML, local (Richter)), micro

Magnitude from

University of Utah Seismograph Stations

Local time

Mon, Dec 31, 2018, 2:57 AM MST

UTC

2018-12-31 09:57:56 UTC

Depth

4.7 km (2.9 mi), shallow

Epicenter

44.573° N, 110.487° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.33

Depth from

From location

Station coverage gap

77°

Stations used

18

• West Yellowstone, MontanaPopulation 1,339. Forecast50 kmESE
• Jackson, WyomingPopulation 10,523. Forecast123 kmN
• Billings, MontanaPopulation 117,116. Forecast206 kmSW
• Calgary, CanadaPopulation 1,306,784. Forecast769 kmSSE

After

1. 2.047 km SSE of Mammoth, WyomingMon, Dec 31, 3:00 AM MST · 2833 days ago · 5 km deep · 0 km away
2. 2.047 km SSE of Mammoth, WyomingMon, Dec 31, 3:08 AM MST · 2833 days ago · 6 km deep · 0 km away
3. 1.6WyomingMon, Dec 31, 3:14 AM MST · 2833 days ago · 4 km deep · 0 km away
4. 1.548 km SSE of Mammoth, WyomingMon, Dec 31, 3:16 AM MST · 2833 days ago · 5 km deep · 0 km away
5. 1.749 km SSE of Mammoth, WyomingMon, Dec 31, 3:16 AM MST · 2833 days ago · 16 km deep · 5 km away
6. 2.647 km SSE of Mammoth, WyomingMon, Dec 31, 3:21 AM MST · 2833 days ago · 5 km deep · 0 km away
7. 2.848 km SSE of Mammoth, WyomingMon, Dec 31, 3:21 AM MST · 2833 days ago · 3 km deep · 1 km away · felt by 1
8. 1.648 km SSE of Mammoth, WyomingMon, Dec 31, 3:50 AM MST · 2833 days ago · 5 km deep · 1 km away
9. 1.812 km E of Hebgen Lake Estates, MontanaWed, Jan 2, 7:58 PM MST · 2830 days ago · 9 km deep · 48 km away
10. 1.938 km SSE of Mammoth, WyomingFri, Jan 4, 2:42 PM MST · 2829 days ago · 5 km deep · 12 km away
11. 2.434 km SW of Silver Gate, MontanaSat, Jan 5, 10:35 PM MST · 2827 days ago · 9 km deep · 28 km away · felt by 1
12. 2.033 km SW of Silver Gate, MontanaSat, Jan 5, 10:36 PM MST · 2827 days ago · 8 km deep · 29 km away
13. 2.334 km SW of Silver Gate, MontanaSat, Jan 5, 10:38 PM MST · 2827 days ago · 8 km deep · 28 km away
14. 2.834 km SW of Silver Gate, MontanaSat, Jan 5, 10:38 PM MST · 2827 days ago · 9 km deep · 28 km away · felt by 1
15. 2.636 km SW of Silver Gate, MontanaSat, Jan 5, 10:39 PM MST · 2827 days ago · 2 km deep · 26 km away
16. 2.634 km SW of Silver Gate, MontanaSat, Jan 5, 10:39 PM MST · 2827 days ago · 7 km deep · 28 km away
17. 2.830 km SW of Silver Gate, MontanaSat, Jan 5, 10:39 PM MST · 2827 days ago · 6 km deep · 31 km away
18. 1.739 km SSE of Mammoth, WyomingMon, Jan 7, 12:15 AM MST · 2826 days ago · 3 km deep · 11 km away
19. 2.451 km SSW of Silver Gate, MontanaSun, Jan 13, 12:39 AM MST · 2820 days ago · 6 km deep · 14 km away
20. 1.939 km SSE of Mammoth, WyomingTue, Jan 15, 4:44 AM MST · 2818 days ago · 5 km deep · 10 km away
21. 2.039 km SSE of Mammoth, WyomingTue, Jan 15, 4:50 AM MST · 2818 days ago · 7 km deep · 11 km away
22. 1.639 km SSE of Mammoth, WyomingTue, Jan 15, 5:12 AM MST · 2818 days ago · 3 km deep · 9 km away
23. 2.449 km SE of West Yellowstone, MontanaTue, Jan 15, 9:52 AM MST · 2818 days ago · 6 km deep · 25 km away · felt by 1
24. 2.014 km SE of West Yellowstone, MontanaThu, Jan 17, 12:26 AM MST · 2816 days ago · 13 km deep · 38 km away
25. 2.051 km SE of West Yellowstone, MontanaWed, Jan 23, 2:59 AM MST · 2810 days ago · 11 km deep · 34 km away
26. 1.651 km SE of West Yellowstone, MontanaWed, Jan 23, 3:02 AM MST · 2810 days ago · 5 km deep · 33 km away
27. 3.052 km SE of West Yellowstone, MontanaWed, Jan 23, 3:05 AM MST · 2810 days ago · 9 km deep · 34 km away
28. 1.625 km WNW of Hebgen Lake Estates, MontanaSun, Jan 27, 1:15 AM MST · 2806 days ago · 12 km deep · 85 km away
29. 1.611 km ESE of West Yellowstone, MontanaSun, Jan 27, 3:04 AM MST · 2806 days ago · 9 km deep · 39 km away
30. 1.830 km S of Silver Gate, MontanaTue, Jan 29, 9:55 AM MST · 2804 days ago · 8 km deep · 40 km away
31. 1.516 km SE of West Yellowstone, MontanaWed, Jan 30, 3:21 PM MST · 2803 days ago · 13 km deep · 37 km away
32. 2.13 km ENE of Hebgen Lake Estates, MontanaFri, Feb 1, 12:28 PM MST · 2801 days ago · 7 km deep · 57 km away
33. 1.63 km ENE of Hebgen Lake Estates, MontanaFri, Feb 1, 11:18 PM MST · 2800 days ago · 8 km deep · 57 km away
34. 1.97 km NNE of Alta, WyomingSun, Feb 3, 6:34 PM MST · 2799 days ago · 11 km deep · 93 km away
35. 1.712 km E of Alta, WyomingThu, Feb 7, 8:16 PM MST · 2794 days ago · 7 km deep · 97 km away
36. 1.927 km W of Hebgen Lake Estates, MontanaThu, Feb 14, 2:03 PM MST · 2788 days ago · 14 km deep · 87 km away
37. 1.933 km E of West Yellowstone, MontanaSat, Feb 16, 8:31 AM MST · 2786 days ago · 7 km deep · 16 km away
38. 3.123 km SSE of West Yellowstone, MontanaSat, Feb 16, 2:22 PM MST · 2786 days ago · 8 km deep · 43 km away · felt by 6
39. 1.523 km SSE of West Yellowstone, MontanaSat, Feb 16, 2:28 PM MST · 2786 days ago · 3 km deep · 41 km away
40. 1.534 km SW of Silver Gate, MontanaSat, Feb 16, 9:43 PM MST · 2785 days ago · 6 km deep · 28 km away
41. 1.516 km SE of West Yellowstone, MontanaSun, Feb 17, 12:55 AM MST · 2785 days ago · 13 km deep · 37 km away · felt by 1
42. 1.612 km NE of West Yellowstone, MontanaSun, Feb 17, 1:43 PM MST · 2785 days ago · 8 km deep · 45 km away
43. 1.546 km SSE of Mammoth, WyomingTue, Feb 19, 5:14 PM MST · 2783 days ago · 4 km deep · 10 km away
44. 1.76 km ESE of Hebgen Lake Estates, MontanaWed, Feb 20, 5:39 AM MST · 2782 days ago · 12 km deep · 54 km away
45. 1.642 km ESE of West Yellowstone, MontanaSat, Feb 23, 12:24 PM MST · 2779 days ago · 5 km deep · 14 km away
46. 1.615 km E of Alta, WyomingMon, Feb 25, 8:46 AM MST · 2777 days ago · 9 km deep · 96 km away · felt by 2
47. 1.949 km SSE of Mammoth, WyomingTue, Feb 26, 5:54 PM MST · 2776 days ago · 2 km deep · 8 km away

Before

1. 1.648 km SSE of Mammoth, WyomingMon, Dec 31, 12:48 AM MST · 2833 days ago · 6 km deep · 1 km away
2. 2.347 km SSE of Mammoth, WyomingMon, Dec 31, 12:31 AM MST · 2833 days ago · 5 km deep · 1 km away
3. 1.948 km SSE of Mammoth, WyomingMon, Dec 31, 12:30 AM MST · 2833 days ago · 2 km deep · 2 km away
4. 2.047 km SSE of Mammoth, WyomingMon, Dec 31, 12:30 AM MST · 2833 days ago · 5 km deep · 1 km away
5. 2.048 km SSE of Mammoth, WyomingMon, Dec 31, 12:29 AM MST · 2833 days ago · 2 km deep · 1 km away
6. 2.247 km SSE of Mammoth, WyomingMon, Dec 31, 12:28 AM MST · 2833 days ago · 4 km deep · 1 km away
7. 1.647 km SSE of Mammoth, WyomingMon, Dec 31, 12:28 AM MST · 2833 days ago · 2 km deep · 1 km away
8. 1.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:27 AM MST · 2833 days ago · 3 km deep · 1 km away
9. 1.748 km SSE of Mammoth, WyomingMon, Dec 31, 12:26 AM MST · 2833 days ago · 6 km deep · 0 km away
10. 2.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:25 AM MST · 2833 days ago · 5 km deep · 1 km away · felt by 2
11. 1.847 km SSE of Mammoth, WyomingMon, Dec 31, 12:23 AM MST · 2833 days ago · 5 km deep · 1 km away
12. 1.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:19 AM MST · 2833 days ago · 6 km deep · 0 km away
13. 1.747 km SSE of Mammoth, WyomingMon, Dec 31, 12:11 AM MST · 2833 days ago · 6 km deep · 0 km away
14. 1.6WyomingMon, Dec 31, 12:10 AM MST · 2833 days ago · 5 km deep · 0 km away
15. 2.210 km NE of West Yellowstone, MontanaMon, Dec 24, 4:31 PM MST · 2840 days ago · 8 km deep · 47 km away
16. 1.612 km NE of West Yellowstone, MontanaMon, Dec 24, 11:14 AM MST · 2840 days ago · 7 km deep · 44 km away · felt by 1
17. 1.6WyomingSun, Dec 23, 11:20 PM MST · 2840 days ago · 6 km deep · 33 km away
18. 1.817 km ESE of West Yellowstone, MontanaSun, Dec 23, 6:04 PM MST · 2841 days ago · 5 km deep · 33 km away
19. 1.617 km NE of West Yellowstone, MontanaSun, Dec 23, 2:51 AM MST · 2841 days ago · 9 km deep · 41 km away
20. 3.121 km W of Hebgen Lake Estates, MontanaThu, Dec 20, 9:36 AM MST · 2844 days ago · 16 km deep · 80 km away · felt by 1

From the USGS Earthquake Hazards Program and its partner networks, event uu60308652. Read Sat, Oct 3, 2026, 1:11 PM UTC.