M1.8 earthquake 23 km SSW of Mammoth, Wyoming

Magnitude

1.8 (ml), micro

Local time

Tue, Jul 24, 2018, 8:39 PM MDT

UTC

2018-07-25 02:39:55 UTC

Depth

4.9 km (3.0 mi), shallow

Epicenter

44.773° N, 110.794° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.39

Depth from

From location

Station coverage gap

110°

Stations used

11

• West Yellowstone, MontanaPopulation 1,339. Forecast27 kmENE
• Bozeman, MontanaPopulation 43,405. Forecast103 kmS
• Billings, MontanaPopulation 117,116. Forecast212 kmWSW
• Calgary, CanadaPopulation 1,306,784. Forecast740 kmSSE

After

1. 2.324 km SSW of Mammoth, WyomingTue, Jul 24, 8:40 PM MDT · 2990 days ago · 5 km deep · 1 km away
2. 1.523 km SSW of Mammoth, WyomingWed, Jul 25, 3:11 AM MDT · 2990 days ago · 5 km deep · 1 km away
3. 2.123 km SSW of Mammoth, WyomingWed, Jul 25, 3:12 AM MDT · 2990 days ago · 5 km deep · 0 km away
4. 1.723 km SSW of Mammoth, WyomingWed, Jul 25, 3:18 AM MDT · 2990 days ago · 7 km deep · 0 km away
5. 1.623 km SSW of Mammoth, WyomingWed, Jul 25, 3:48 AM MDT · 2990 days ago · 6 km deep · 0 km away
6. 2.123 km SSW of Mammoth, WyomingWed, Jul 25, 4:49 AM MDT · 2989 days ago · 8 km deep · 0 km away
7. 1.523 km SSW of Mammoth, WyomingWed, Jul 25, 5:10 AM MDT · 2989 days ago · 7 km deep · 0 km away
8. 2.122 km SSW of Mammoth, WyomingWed, Jul 25, 5:52 AM MDT · 2989 days ago · 9 km deep · 1 km away
9. 1.623 km SSW of Mammoth, WyomingWed, Jul 25, 5:05 PM MDT · 2989 days ago · 7 km deep · 1 km away
10. 1.623 km SSW of Mammoth, WyomingWed, Jul 25, 5:08 PM MDT · 2989 days ago · 5 km deep · 0 km away
11. 1.723 km SSW of Mammoth, WyomingThu, Jul 26, 10:28 AM MDT · 2988 days ago · 7 km deep · 0 km away
12. 1.623 km SSW of Mammoth, WyomingThu, Jul 26, 12:34 PM MDT · 2988 days ago · 4 km deep · 0 km away
13. 1.723 km SSW of Mammoth, WyomingThu, Jul 26, 1:40 PM MDT · 2988 days ago · 5 km deep · 1 km away
14. 1.851 km SE of West Yellowstone, MontanaFri, Jul 27, 8:39 AM MDT · 2987 days ago · 4 km deep · 46 km away
15. 1.851 km SE of West Yellowstone, MontanaFri, Jul 27, 8:41 AM MDT · 2987 days ago · 4 km deep · 45 km away
16. 1.521 km SSW of Mammoth, WyomingFri, Jul 27, 3:21 PM MDT · 2987 days ago · 4 km deep · 3 km away
17. 1.650 km SE of West Yellowstone, MontanaFri, Jul 27, 6:07 PM MDT · 2987 days ago · 2 km deep · 46 km away
18. 1.951 km SE of West Yellowstone, MontanaSat, Jul 28, 12:27 PM MDT · 2986 days ago · 3 km deep · 46 km away
19. 1.756 km SSW of Silver Gate, MontanaThu, Aug 2, 7:16 PM MDT · 2981 days ago · 6 km deep · 58 km away
20. 2.15 km E of Hebgen Lake Estates, MontanaThu, Aug 2, 10:46 PM MDT · 2981 days ago · 11 km deep · 26 km away
21. 2.15 km E of Hebgen Lake Estates, MontanaThu, Aug 2, 11:28 PM MDT · 2981 days ago · 11 km deep · 26 km away
22. 1.65 km E of Hebgen Lake Estates, MontanaFri, Aug 3, 3:14 PM MDT · 2980 days ago · 10 km deep · 26 km away
23. 1.65 km E of Hebgen Lake Estates, MontanaFri, Aug 3, 3:32 PM MDT · 2980 days ago · 10 km deep · 26 km away
24. 2.536 km S of Silver Gate, MontanaTue, Aug 7, 4:19 AM MDT · 2976 days ago · 15 km deep · 60 km away
25. 1.717 km ENE of Hebgen Lake Estates, MontanaFri, Aug 10, 10:58 AM MDT · 2973 days ago · 11 km deep · 15 km away
26. 2.144 km W of Hebgen Lake Estates, MontanaFri, Aug 10, 11:22 AM MDT · 2973 days ago · 11 km deep · 76 km away
27. 1.845 km ENE of Warm River, IdahoWed, Aug 15, 11:17 PM MDT · 2968 days ago · 7 km deep · 58 km away
28. 1.6Idaho-Montana border regionFri, Aug 17, 12:13 AM MDT · 2967 days ago · 10 km deep · 18 km away
29. 1.513 km E of Hebgen Lake Estates, MontanaFri, Aug 17, 4:30 AM MDT · 2966 days ago · 10 km deep · 18 km away
30. 1.849 km ESE of West Yellowstone, MontanaTue, Aug 21, 2:02 AM MDT · 2963 days ago · 6 km deep · 40 km away
31. 1.947 km ESE of West Yellowstone, MontanaSun, Aug 26, 2:27 PM MDT · 2957 days ago · 4 km deep · 38 km away
32. 1.647 km ESE of West Yellowstone, MontanaSun, Aug 26, 2:32 PM MDT · 2957 days ago · 4 km deep · 38 km away
33. 1.7WyomingSun, Aug 26, 2:33 PM MDT · 2957 days ago · 4 km deep · 38 km away
34. 1.747 km ESE of West Yellowstone, MontanaSun, Aug 26, 2:36 PM MDT · 2957 days ago · 4 km deep · 38 km away
35. 2.047 km ESE of West Yellowstone, MontanaSun, Aug 26, 2:45 PM MDT · 2957 days ago · 4 km deep · 38 km away
36. 2.047 km ESE of West Yellowstone, MontanaSun, Aug 26, 2:55 PM MDT · 2957 days ago · 4 km deep · 38 km away
37. 2.545 km NNE of Spencer, IdahoMon, Aug 27, 2:22 AM MDT · 2957 days ago · 5 km deep · 98 km away
38. 1.823 km SSW of Mammoth, WyomingWed, Aug 29, 11:42 AM MDT · 2954 days ago · 5 km deep · 0 km away
39. 2.323 km SSW of Mammoth, WyomingWed, Aug 29, 12:07 PM MDT · 2954 days ago · 5 km deep · 0 km away
40. 2.423 km SSW of Mammoth, WyomingWed, Aug 29, 1:44 PM MDT · 2954 days ago · 5 km deep · 0 km away
41. 2.222 km SSW of Mammoth, WyomingWed, Aug 29, 9:55 PM MDT · 2954 days ago · 5 km deep · 1 km away
42. 1.545 km SSE of Mammoth, WyomingTue, Sep 4, 6:10 PM MDT · 2948 days ago · 4 km deep · 34 km away
43. 1.639 km S of Silver Gate, MontanaFri, Sep 7, 6:50 AM MDT · 2945 days ago · 13 km deep · 62 km away
44. 1.640 km S of Silver Gate, MontanaFri, Sep 7, 2:43 PM MDT · 2945 days ago · 10 km deep · 61 km away
45. 1.944 km W of Hebgen Lake Estates, MontanaMon, Sep 10, 3:08 AM MDT · 2943 days ago · 10 km deep · 75 km away
46. 2.925 km ESE of Mammoth, WyomingTue, Sep 11, 7:30 AM MDT · 2941 days ago · 11 km deep · 30 km away
47. 2.035 km ESE of Island Park, IdahoThu, Sep 13, 7:59 AM MDT · 2939 days ago · 4 km deep · 48 km away
48. 1.714 km S of West Yellowstone, MontanaSun, Sep 16, 1:51 PM MDT · 2936 days ago · 13 km deep · 36 km away
49. 1.754 km SE of West Yellowstone, MontanaWed, Sep 19, 8:44 AM MDT · 2933 days ago · 6 km deep · 49 km away

Before

1. 2.022 km SSW of Mammoth, WyomingTue, Jul 24, 3:35 PM MDT · 2990 days ago · 9 km deep · 1 km away
2. 2.123 km SSW of Mammoth, WyomingTue, Jul 24, 2:17 PM MDT · 2990 days ago · 8 km deep · 1 km away
3. 1.622 km SSW of Mammoth, WyomingTue, Jul 24, 5:07 AM MDT · 2990 days ago · 8 km deep · 1 km away
4. 1.523 km SSW of Mammoth, WyomingMon, Jul 23, 5:16 AM MDT · 2991 days ago · 5 km deep · 0 km away
5. 1.515 km NE of West Yellowstone, MontanaSun, Jul 22, 11:26 PM MDT · 2992 days ago · 7 km deep · 14 km away
6. 1.512 km SSE of West Yellowstone, MontanaSun, Jul 22, 11:34 AM MDT · 2992 days ago · 15 km deep · 33 km away
7. 1.744 km W of Hebgen Lake Estates, MontanaThu, Jul 19, 8:13 PM MDT · 2995 days ago · 11 km deep · 75 km away
8. 1.523 km SSW of Mammoth, WyomingTue, Jul 17, 2:31 PM MDT · 2997 days ago · 5 km deep · 0 km away
9. 1.637 km NW of Island Park, IdahoTue, Jul 17, 1:42 PM MDT · 2997 days ago · 5 km deep · 74 km away
10. 1.623 km SSW of Mammoth, WyomingMon, Jul 16, 11:37 AM MDT · 2998 days ago · 3 km deep · 1 km away
11. 1.848 km SSW of Silver Gate, MontanaSun, Jul 15, 11:55 AM MDT · 2999 days ago · 6 km deep · 50 km away
12. 1.943 km SE of West Yellowstone, MontanaThu, Jul 5, 12:05 AM MDT · 3010 days ago · -3 km deep · 40 km away
13. 1.847 km ESE of West Yellowstone, MontanaThu, Jul 5, 12:01 AM MDT · 3010 days ago · 1 km deep · 39 km away
14. 1.947 km ESE of West Yellowstone, MontanaWed, Jul 4, 11:53 PM MDT · 3010 days ago · 2 km deep · 39 km away
15. 1.662 km ESE of West Yellowstone, MontanaWed, Jul 4, 10:13 PM MDT · 3010 days ago · 11 km deep · 53 km away
16. 2.5WyomingWed, Jul 4, 7:09 PM MDT · 3010 days ago · 11 km deep · 53 km away
17. 1.96 km SW of West Yellowstone, MontanaTue, Jul 3, 10:06 AM MDT · 3011 days ago · 13 km deep · 34 km away
18. 2.362 km ESE of West Yellowstone, MontanaMon, Jul 2, 8:38 PM MDT · 3012 days ago · 7 km deep · 53 km away
19. 2.062 km ESE of West Yellowstone, MontanaMon, Jul 2, 8:35 PM MDT · 3012 days ago · 9 km deep · 53 km away
20. 1.562 km SSE of Mammoth, WyomingSun, Jul 1, 10:37 AM MDT · 3013 days ago · 4 km deep · 49 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu60290102. Read Wed, Sep 30, 2026, 9:31 PM UTC.