M1.5 earthquake 25 km SSW of Mammoth, Wyoming

Magnitude

1.5 (ML, local (Richter)), micro

Magnitude from

University of Utah Seismograph Stations

Local time

Tue, Dec 5, 2017, 3:15 AM MST

UTC

2017-12-05 10:15:15 UTC

Depth

4.3 km (2.7 mi), shallow

Epicenter

44.761° N, 110.801° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.48

Depth from

From location

Station coverage gap

85°

Stations used

14

• West Yellowstone, MontanaPopulation 1,339. Forecast26 kmENE
• Bozeman, MontanaPopulation 43,405. Forecast104 kmS
• Billings, MontanaPopulation 117,116. Forecast213 kmWSW
• Calgary, CanadaPopulation 1,306,784. Forecast741 kmSSE

After

1. 1.911 km SW of West Yellowstone, MontanaTue, Dec 5, 3:24 PM MST · 3225 days ago · 14 km deep · 38 km away
2. 1.613 km E of Hebgen Lake Estates, MontanaWed, Dec 6, 7:12 PM MST · 3223 days ago · 8 km deep · 17 km away
3. 2.246 km SSW of Silver Gate, MontanaFri, Dec 8, 2:41 PM MST · 3222 days ago · 5 km deep · 47 km away
4. 1.9Idaho-Montana border regionWed, Dec 13, 2:12 AM MST · 3217 days ago · 8 km deep · 18 km away
5. 1.740 km NNE of Spencer, IdahoThu, Dec 14, 8:22 PM MST · 3215 days ago · 7 km deep · 92 km away
6. 2.337 km S of Silver Gate, MontanaMon, Dec 18, 4:44 PM MST · 3212 days ago · 13 km deep · 65 km away
7. 1.939 km S of Silver Gate, MontanaTue, Dec 19, 9:00 PM MST · 3210 days ago · 10 km deep · 64 km away
8. 2.037 km S of Silver Gate, MontanaSun, Dec 24, 2:35 PM MST · 3206 days ago · 16 km deep · 63 km away
9. 2.143 km NE of Spencer, IdahoTue, Dec 26, 8:49 AM MST · 3204 days ago · 10 km deep · 85 km away
10. 1.8Idaho-Montana border regionThu, Dec 28, 8:11 AM MST · 3202 days ago · 9 km deep · 20 km away
11. 1.647 km SE of Mammoth, WyomingFri, Dec 29, 8:47 PM MST · 3200 days ago · 3 km deep · 38 km away
12. 2.121 km NE of West Yellowstone, MontanaThu, Jan 4, 11:45 PM MST · 3194 days ago · 5 km deep · 9 km away
13. 2.446 km SSW of Silver Gate, MontanaTue, Jan 9, 8:00 AM MST · 3190 days ago · 6 km deep · 44 km away
14. 2.237 km SSE of Virginia City, MontanaSat, Jan 13, 5:17 AM MST · 3186 days ago · 5 km deep · 80 km away
15. 1.834 km SSE of Virginia City, MontanaSat, Jan 13, 7:01 AM MST · 3186 days ago · 7 km deep · 82 km away
16. 1.646 km ESE of West Yellowstone, MontanaSun, Jan 14, 4:05 PM MST · 3185 days ago · 2 km deep · 31 km away
17. 1.646 km ESE of West Yellowstone, MontanaTue, Jan 16, 4:36 PM MST · 3183 days ago · 5 km deep · 31 km away
18. 1.649 km ESE of West Yellowstone, MontanaFri, Jan 19, 8:18 AM MST · 3180 days ago · 4 km deep · 38 km away
19. 1.513 km NE of Tetonia, IdahoSun, Jan 21, 12:00 AM MST · 3178 days ago · 14 km deep · 97 km away
20. 1.634 km ESE of West Yellowstone, MontanaTue, Jan 23, 8:32 AM MST · 3176 days ago · 8 km deep · 20 km away
21. 1.624 km SSE of West Yellowstone, MontanaThu, Jan 25, 12:26 PM MST · 3174 days ago · 4 km deep · 37 km away
22. 2.225 km SSE of West Yellowstone, MontanaFri, Jan 26, 8:26 AM MST · 3173 days ago · 4 km deep · 39 km away
23. 1.546 km SE of West Yellowstone, MontanaTue, Jan 30, 3:56 PM MST · 3169 days ago · 4 km deep · 41 km away
24. 2.09 km ENE of Hebgen Lake Estates, MontanaThu, Feb 1, 7:00 AM MST · 3167 days ago · 7 km deep · 22 km away
25. 1.624 km ENE of West Yellowstone, MontanaSat, Feb 3, 2:37 AM MST · 3165 days ago · 8 km deep · 4 km away

Before

1. 2.27 km SW of Hebgen Lake Estates, MontanaTue, Dec 5, 3:08 AM MST · 3225 days ago · 15 km deep · 37 km away
2. 1.725 km SSW of Mammoth, WyomingTue, Dec 5, 3:03 AM MST · 3225 days ago · 5 km deep · 0 km away
3. 2.442 km NNE of Spencer, IdahoWed, Nov 29, 11:13 PM MST · 3230 days ago · 6 km deep · 91 km away
4. 1.624 km SSE of Mammoth, WyomingTue, Nov 28, 2:20 PM MST · 3232 days ago · 3 km deep · 13 km away
5. 1.525 km S of Mammoth, WyomingTue, Nov 28, 2:10 PM MST · 3232 days ago · 3 km deep · 12 km away
6. 2.019 km W of Hebgen Lake Estates, MontanaSun, Nov 26, 1:32 PM MST · 3234 days ago · 14 km deep · 50 km away
7. 1.611 km E of Hebgen Lake Estates, MontanaFri, Nov 17, 3:02 AM MST · 3243 days ago · 9 km deep · 20 km away
8. 1.641 km NNE of Spencer, IdahoWed, Nov 15, 5:58 AM MST · 3245 days ago · 13 km deep · 90 km away
9. 2.82 km W of Gallatin Gateway, MontanaMon, Nov 6, 2:13 AM MST · 3254 days ago · 9 km deep · 98 km away · felt by 13
10. 2.0Idaho-Montana border regionSun, Nov 5, 7:44 AM MST · 3255 days ago · 16 km deep · 44 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu60261097. Read Sun, Oct 4, 2026, 12:26 PM UTC.