M1.9 earthquake 12km ESE of Viola, CA

Magnitude

1.9 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Wed, Sep 8, 2021, 12:40 PM PDT

UTC

2021-09-08 19:40:10 UTC

Depth

4.8 km (3.0 mi), shallow

Epicenter

40.478° N, 121.545° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.21

Depth from

From location

Station coverage gap

111°

Stations used

13

• Shingletown, CaliforniaPopulation 2,283. Forecast29 kmE
• Anderson, CaliforniaPopulation 10,217. Forecast64 kmE
• Chico, CaliforniaPopulation 121,345. Forecast87 kmNNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast772 kmNNW

After

1. 1.64km W of Shasta Lake, CAThu, Sep 9, 6:27 PM PDT · 1850 days ago · 19 km deep · 77 km away
2. 1.615km NNE of Mineral, CASat, Sep 11, 2:16 AM PDT · 1849 days ago · 3 km deep · 6 km away
3. 2.10km S of Palo Cedro, CASun, Sep 12, 1:49 PM PDT · 1848 days ago · 15 km deep · 59 km away · felt by 1
4. 1.72km SW of Palo Cedro, CAMon, Sep 13, 9:51 AM PDT · 1847 days ago · 14 km deep · 60 km away
5. 2.55km NNE of Hamilton City, CAFri, Sep 17, 10:07 AM PDT · 1843 days ago · 19 km deep · 86 km away · felt by 1
6. 2.14km SE of Taylorsville, CASat, Sep 18, 6:38 AM PDT · 1842 days ago · 0 km deep · 79 km away
7. 2.56km NW of Chico, CASun, Sep 19, 5:27 AM PDT · 1841 days ago · 29 km deep · 83 km away
8. 1.910km WSW of Chester, CAThu, Sep 23, 2:43 AM PDT · 1837 days ago · 9 km deep · 30 km away
9. 1.99km SSE of McCloud, CAThu, Sep 23, 7:46 PM PDT · 1836 days ago · 4 km deep · 91 km away
10. 1.56km NNE of Millville, CAFri, Sep 24, 11:39 AM PDT · 1836 days ago · 13 km deep · 54 km away
11. 2.24km ENE of Prattville, CASun, Sep 26, 12:44 AM PDT · 1834 days ago · 8 km deep · 46 km away
12. 1.512km ESE of Viola, CAWed, Sep 29, 2:22 PM PDT · 1831 days ago · 3 km deep · 1 km away
13. 2.09km WSW of Chester, CAThu, Sep 30, 6:37 AM PDT · 1830 days ago · 1 km deep · 29 km away
14. 1.512km ESE of Viola, CAFri, Oct 1, 7:13 AM PDT · 1829 days ago · 4 km deep · 1 km away
15. 1.99km WSW of Chester, CAFri, Oct 1, 12:38 PM PDT · 1829 days ago · 4 km deep · 30 km away
16. 2.12km NW of Bella Vista, CASat, Oct 2, 12:04 PM PDT · 1828 days ago · 26 km deep · 63 km away
17. 1.74km NW of Bella Vista, CASun, Oct 3, 7:46 AM PDT · 1827 days ago · 27 km deep · 64 km away
18. 1.84km E of Shasta, CATue, Oct 5, 4:00 AM PDT · 1825 days ago · 21 km deep · 77 km away
19. 2.110km NNW of Burney, CAWed, Oct 6, 12:57 AM PDT · 1824 days ago · 10 km deep · 56 km away
20. 2.54km ENE of Shasta, CAWed, Oct 6, 7:18 PM PDT · 1823 days ago · 22 km deep · 78 km away · felt by 3
21. 2.513km SE of Dunsmuir, CAThu, Oct 7, 8:58 PM PDT · 1822 days ago · 7 km deep · 89 km away · felt by 11
22. 1.612km SE of Dunsmuir, CAFri, Oct 8, 2:55 AM PDT · 1822 days ago · 4 km deep · 89 km away
23. 1.74km ENE of Shasta, CAFri, Oct 8, 1:06 PM PDT · 1822 days ago · 21 km deep · 77 km away
24. 1.616km N of Shingletown, CAWed, Oct 13, 7:24 AM PDT · 1817 days ago · 11 km deep · 33 km away · felt by 1
25. 1.913km WSW of Almanor, CAWed, Oct 13, 1:01 PM PDT · 1817 days ago · 9 km deep · 39 km away
26. 2.96km NNE of Hamilton City, CASun, Oct 17, 9:50 AM PDT · 1813 days ago · 17 km deep · 85 km away
27. 2.26km NW of Redding, CAWed, Oct 20, 2:46 AM PDT · 1810 days ago · 20 km deep · 76 km away
28. 2.113km NE of Montgomery Creek, CASun, Oct 24, 6:57 PM PDT · 1805 days ago · 12 km deep · 54 km away
29. 2.114km ESE of Viola, CAMon, Oct 25, 9:48 PM PDT · 1804 days ago · 4 km deep · 2 km away
30. 2.16km SW of Cromberg, CAWed, Oct 27, 5:16 AM PDT · 1803 days ago · 2 km deep · 98 km away
31. 2.13km NNE of Chester, CAWed, Oct 27, 10:13 PM PDT · 1802 days ago · 8 km deep · 32 km away
32. 1.83km NNE of Chester, CAThu, Oct 28, 6:08 PM PDT · 1801 days ago · 10 km deep · 32 km away
33. 2.75km ENE of East Quincy, CAFri, Oct 29, 3:26 PM PDT · 1800 days ago · 5 km deep · 84 km away · felt by 7
34. 1.836km SE of Fall River Mills, CASun, Oct 31, 9:26 AM PDT · 1799 days ago · 14 km deep · 42 km away
35. 1.619km NE of Big Bend, CAMon, Nov 1, 12:00 AM PDT · 1798 days ago · 4 km deep · 72 km away
36. 2.13km NNE of Chester, CATue, Nov 2, 10:40 PM PDT · 1796 days ago · 9 km deep · 32 km away
37. 1.916km SSE of McCloud, CAWed, Nov 3, 12:27 AM PDT · 1796 days ago · 8 km deep · 83 km away
38. 2.511km NNE of Bella Vista, CAThu, Nov 4, 2:47 PM PDT · 1794 days ago · 9 km deep · 60 km away · felt by 2
39. 1.812km NE of Bella Vista, CAThu, Nov 4, 4:24 PM PDT · 1794 days ago · 7 km deep · 58 km away · felt by 1

Before

1. 1.51km NW of Palo Cedro, CATue, Sep 7, 4:15 PM PDT · 1852 days ago · 16 km deep · 60 km away
2. 1.63km WSW of Shasta Lake, CATue, Sep 7, 9:09 AM PDT · 1853 days ago · 17 km deep · 75 km away
3. 1.51km NW of Palo Cedro, CAMon, Sep 6, 8:45 PM PDT · 1853 days ago · 15 km deep · 60 km away
4. 1.61km SW of Palo Cedro, CAMon, Sep 6, 9:04 AM PDT · 1854 days ago · 13 km deep · 60 km away
5. 1.84km NNE of Hamilton City, CASat, Sep 4, 11:30 AM PDT · 1856 days ago · 14 km deep · 87 km away
6. 1.72km WSW of Palo Cedro, CAFri, Sep 3, 2:51 AM PDT · 1857 days ago · 18 km deep · 61 km away
7. 1.62km W of Palo Cedro, CASun, Aug 29, 10:18 PM PDT · 1861 days ago · 14 km deep · 61 km away
8. 1.56km ESE of Bella Vista, CATue, Aug 24, 11:09 PM PDT · 1866 days ago · 14 km deep · 55 km away
9. 1.63km S of East Shore, CASat, Aug 21, 2:12 PM PDT · 1870 days ago · 6 km deep · 49 km away
10. 1.99km W of Caribou, CAThu, Aug 19, 9:51 PM PDT · 1871 days ago · 9 km deep · 49 km away
11. 1.615km SSW of Mineral, CAThu, Aug 19, 3:29 AM PDT · 1872 days ago · 5 km deep · 28 km away
12. 1.615km SSW of Mineral, CAThu, Aug 19, 3:24 AM PDT · 1872 days ago · 4 km deep · 28 km away
13. 1.610km NNE of Mineral, CATue, Aug 17, 6:37 AM PDT · 1874 days ago · 3 km deep · 4 km away
14. 1.611km NNE of Mineral, CAMon, Aug 16, 11:54 PM PDT · 1874 days ago · 4 km deep · 3 km away
15. 1.711km NNE of Mineral, CAMon, Aug 16, 11:51 PM PDT · 1874 days ago · 4 km deep · 3 km away
16. 1.510km NNE of Mineral, CAMon, Aug 16, 11:47 PM PDT · 1874 days ago · 2 km deep · 4 km away
17. 1.910km NNE of Mineral, CAMon, Aug 16, 11:47 PM PDT · 1874 days ago · 3 km deep · 4 km away
18. 1.911km NNE of Mineral, CAMon, Aug 16, 11:47 PM PDT · 1874 days ago · 4 km deep · 3 km away
19. 2.17km N of Greenhorn, CASun, Aug 15, 5:40 PM PDT · 1875 days ago · 7 km deep · 89 km away
20. 1.714km N of Big Bend, CASun, Aug 15, 6:41 AM PDT · 1876 days ago · 9 km deep · 80 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73622331. Read Sun, Oct 4, 2026, 9:15 AM UTC.