M1.9 earthquake 46 km NE of Alta, Wyoming

Magnitude

1.9 (ML, local (Richter)), micro

Magnitude from

University of Utah Seismograph Stations

Local time

Tue, Oct 26, 2021, 2:17 PM MDT

UTC

2021-10-26 20:17:20 UTC

Depth

9.8 km (6.1 mi), shallow

Epicenter

44.080° N, 110.675° W

Region

Wyoming

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

132°

Stations used

14

• Driggs, IdahoPopulation 1,689. Forecast53 kmNE
• Jackson, WyomingPopulation 10,523. Forecast67 kmN
• Billings, MontanaPopulation 117,116. Forecast255 kmSW
• Calgary, CanadaPopulation 1,306,784. Forecast816 kmSSE

After

1. 1.937 km S of Silver Gate, MontanaWed, Oct 27, 9:19 PM MDT · 1803 days ago · 13 km deep · 83 km away
2. 1.637 km S of Silver Gate, MontanaWed, Oct 27, 9:47 PM MDT · 1803 days ago · 14 km deep · 82 km away
3. 2.336 km S of Silver Gate, MontanaWed, Oct 27, 10:46 PM MDT · 1803 days ago · 13 km deep · 84 km away
4. 2.028 km S of Mammoth, WyomingMon, Nov 1, 12:38 AM MDT · 1799 days ago · 5 km deep · 71 km away
5. 1.727 km S of Mammoth, WyomingMon, Nov 1, 12:39 AM MDT · 1799 days ago · 5 km deep · 72 km away
6. 1.728 km S of Mammoth, WyomingMon, Nov 1, 12:57 AM MDT · 1799 days ago · 4 km deep · 72 km away
7. 1.544 km SE of West Yellowstone, MontanaMon, Nov 1, 11:51 PM MDT · 1798 days ago · 4 km deep · 35 km away
8. 1.624 km ESE of Kelly, WyomingSat, Nov 6, 5:57 AM MDT · 1794 days ago · 3 km deep · 67 km away
9. 1.927 km S of Mammoth, WyomingSat, Nov 6, 10:38 AM MDT · 1794 days ago · 4 km deep · 73 km away
10. 1.517 km ENE of Bondurant, WyomingMon, Nov 8, 8:59 AM MST · 1792 days ago · 6 km deep · 97 km away
11. 2.321 km ENE of Hebgen Lake Estates, MontanaMon, Nov 8, 9:23 PM MST · 1791 days ago · 8 km deep · 89 km away
12. 1.621 km ENE of Hebgen Lake Estates, MontanaTue, Nov 9, 11:51 AM MST · 1791 days ago · 7 km deep · 89 km away
13. 2.546 km NE of Alta, WyomingWed, Nov 10, 5:56 AM MST · 1790 days ago · 10 km deep · 1 km away · felt by 1
14. 2.246 km NE of Alta, WyomingWed, Nov 10, 6:15 AM MST · 1790 days ago · 7 km deep · 1 km away
15. 2.029 km ESE of Kelly, WyomingWed, Nov 10, 8:16 PM MST · 1789 days ago · 8 km deep · 69 km away
16. 1.540 km SSE of West Yellowstone, MontanaWed, Nov 10, 9:07 PM MST · 1789 days ago · 2 km deep · 33 km away
17. 1.6WyomingWed, Nov 10, 9:09 PM MST · 1789 days ago · 9 km deep · 32 km away
18. 1.727 km S of Mammoth, WyomingFri, Nov 12, 6:45 AM MST · 1788 days ago · 4 km deep · 73 km away
19. 1.846 km NE of Alta, WyomingSat, Nov 13, 12:03 AM MST · 1787 days ago · 10 km deep · 0 km away
20. 1.950 km SSE of Mammoth, WyomingTue, Nov 16, 5:31 AM MST · 1784 days ago · 2 km deep · 60 km away
21. 2.211 km E of Kelly, WyomingTue, Nov 16, 5:59 AM MST · 1784 days ago · 6 km deep · 54 km away
22. 1.99 km W of Bondurant, WyomingFri, Nov 19, 5:31 AM MST · 1781 days ago · 10 km deep · 98 km away
23. 1.928 km S of Mammoth, WyomingSun, Nov 21, 1:23 AM MST · 1779 days ago · 4 km deep · 71 km away
24. 1.532 km ESE of Kelly, WyomingSun, Nov 21, 8:50 PM MST · 1778 days ago · 5 km deep · 72 km away
25. 2.0WyomingMon, Nov 22, 12:30 AM MST · 1778 days ago · 0 km deep · 50 km away
26. 1.99 km W of Bondurant, WyomingMon, Nov 22, 4:46 AM MST · 1778 days ago · 8 km deep · 99 km away
27. 1.829 km S of Mammoth, WyomingMon, Nov 22, 10:06 AM MST · 1778 days ago · 5 km deep · 71 km away
28. 1.830 km ESE of West Yellowstone, MontanaFri, Nov 26, 8:00 AM MST · 1774 days ago · 8 km deep · 58 km away
29. 1.939 km ESE of West Yellowstone, MontanaSat, Nov 27, 2:00 AM MST · 1773 days ago · 7 km deep · 54 km away
30. 1.612 km NE of Bondurant, WyomingSun, Nov 28, 7:55 AM MST · 1772 days ago · 6 km deep · 96 km away
31. 2.419 km NE of West Yellowstone, MontanaSun, Nov 28, 5:00 PM MST · 1771 days ago · 8 km deep · 81 km away
32. 1.946 km ESE of West Yellowstone, MontanaMon, Nov 29, 4:13 PM MST · 1770 days ago · 7 km deep · 52 km away
33. 1.922 km SSW of Mammoth, WyomingWed, Dec 1, 5:15 AM MST · 1769 days ago · 4 km deep · 79 km away
34. 1.619 km ENE of West Yellowstone, MontanaSun, Dec 5, 4:01 PM MST · 1764 days ago · 8 km deep · 75 km away
35. 1.916 km SW of Wilson, WyomingSun, Dec 5, 5:30 PM MST · 1764 days ago · 5 km deep · 80 km away
36. 1.7WyomingMon, Dec 6, 7:43 AM MST · 1764 days ago · 13 km deep · 84 km away
37. 1.828 km S of Mammoth, WyomingThu, Dec 9, 1:56 AM MST · 1761 days ago · 4 km deep · 71 km away
38. 2.635 km S of Silver Gate, MontanaSat, Dec 18, 2:12 PM MST · 1751 days ago · 15 km deep · 86 km away
39. 1.85 km NNE of Alta, WyomingMon, Dec 20, 7:46 AM MST · 1750 days ago · 11 km deep · 41 km away
40. 2.566 km NNE of Kelly, WyomingFri, Dec 24, 12:41 AM MST · 1746 days ago · 11 km deep · 34 km away

Before

1. 2.128 km S of Mammoth, WyomingSun, Oct 24, 9:29 PM MDT · 1806 days ago · 5 km deep · 71 km away
2. 1.7WyomingSun, Oct 24, 8:32 PM MDT · 1806 days ago · 4 km deep · 71 km away
3. 1.829 km S of Mammoth, WyomingSun, Oct 24, 8:24 PM MDT · 1806 days ago · 5 km deep · 71 km away
4. 1.629 km S of Mammoth, WyomingSun, Oct 24, 8:08 PM MDT · 1806 days ago · 5 km deep · 70 km away
5. 1.631 km ESE of West Yellowstone, MontanaSun, Oct 24, 7:05 AM MDT · 1807 days ago · 7 km deep · 56 km away
6. 1.632 km ESE of West Yellowstone, MontanaSun, Oct 24, 7:05 AM MDT · 1807 days ago · 6 km deep · 55 km away
7. 1.922 km S of Mammoth, WyomingSun, Oct 24, 6:52 AM MDT · 1807 days ago · 4 km deep · 78 km away
8. 1.751 km SE of West Yellowstone, MontanaWed, Oct 20, 8:47 AM MDT · 1811 days ago · 4 km deep · 29 km away
9. 1.647 km ESE of West Yellowstone, MontanaMon, Oct 18, 9:57 AM MDT · 1813 days ago · 5 km deep · 48 km away
10. 1.647 km W of Cody, WyomingSun, Oct 17, 2:17 AM MDT · 1814 days ago · 9 km deep · 96 km away
11. 1.666 km ESE of West Yellowstone, MontanaThu, Oct 14, 2:03 AM MDT · 1817 days ago · 7 km deep · 47 km away
12. 1.665 km ESE of West Yellowstone, MontanaThu, Oct 14, 1:42 AM MDT · 1817 days ago · 7 km deep · 46 km away
13. 1.79 km ENE of Alta, WyomingThu, Oct 14, 12:32 AM MDT · 1817 days ago · 11 km deep · 38 km away
14. 1.610 km ENE of Alta, WyomingTue, Oct 12, 2:22 AM MDT · 1819 days ago · 10 km deep · 38 km away
15. 1.528 km E of West Yellowstone, MontanaSun, Oct 10, 5:13 AM MDT · 1821 days ago · 8 km deep · 64 km away
16. 1.528 km E of West Yellowstone, MontanaSun, Oct 10, 5:10 AM MDT · 1821 days ago · 8 km deep · 64 km away
17. 2.410 km ENE of Alta, WyomingSat, Oct 9, 4:48 PM MDT · 1821 days ago · 11 km deep · 38 km away · felt by 2
18. 1.760 km SE of West Yellowstone, MontanaSat, Oct 9, 4:42 PM MDT · 1821 days ago · 4 km deep · 32 km away
19. 1.523 km SSE of Mammoth, WyomingTue, Oct 5, 8:34 AM MDT · 1826 days ago · 4 km deep · 77 km away
20. 1.625 km SSE of Mammoth, WyomingTue, Oct 5, 8:24 AM MDT · 1826 days ago · 5 km deep · 75 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu60465407. Read Mon, Oct 5, 2026, 7:38 AM UTC.