M1.8 earthquake 9km ESE of Millville, CA

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Thu, Apr 22, 2021, 1:19 PM PDT

UTC

2021-04-22 20:19:59 UTC

Depth

16.4 km (10.2 mi), shallow

Epicenter

40.537° N, 122.085° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

53°

Stations used

20

• Millville, CaliforniaPopulation 727. Forecast8 kmE
• Anderson, CaliforniaPopulation 10,217. Forecast21 kmENE
• Chico, CaliforniaPopulation 121,345. Forecast92 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast797 kmNNW

After

1. 2.010km WNW of Viola, CAFri, Apr 23, 10:08 AM PDT · 1989 days ago · 10 km deep · 26 km away
2. 1.818km WSW of Almanor, CAFri, Apr 23, 9:55 PM PDT · 1989 days ago · 11 km deep · 73 km away
3. 1.83km WSW of Shasta Lake, CATue, Apr 27, 2:42 PM PDT · 1985 days ago · 17 km deep · 31 km away
4. 2.219km WSW of Manton, CAThu, Apr 29, 12:23 AM PDT · 1984 days ago · 15 km deep · 23 km away
5. 2.72km NNW of Chico, CASat, May 1, 11:26 AM PDT · 1981 days ago · 14 km deep · 90 km away · felt by 4
6. 1.729km N of Shasta Lake, CASat, May 8, 9:15 PM PDT · 1974 days ago · 14 km deep · 53 km away
7. 1.72km NE of Chester, CASun, May 9, 6:35 AM PDT · 1973 days ago · 10 km deep · 77 km away
8. 1.913km W of Shingletown, CASun, May 9, 7:01 AM PDT · 1973 days ago · 17 km deep · 7 km away
9. 2.126km W of Rancho Tehama Reserve, CATue, May 11, 8:38 AM PDT · 1971 days ago · 1 km deep · 80 km away
10. 2.925km N of Shasta Lake, CAWed, May 12, 10:44 AM PDT · 1970 days ago · 20 km deep · 48 km away · felt by 16
11. 1.625km NNE of Hamilton Branch, CAWed, May 12, 7:53 PM PDT · 1970 days ago · 2 km deep · 94 km away
12. 2.010km ENE of French Gulch, CAThu, May 13, 10:05 PM PDT · 1969 days ago · 15 km deep · 42 km away
13. 1.69km E of Millville, CAThu, May 20, 8:03 AM PDT · 1962 days ago · 11 km deep · 2 km away
14. 2.018km WNW of Round Mountain, CAThu, May 20, 4:44 PM PDT · 1962 days ago · 13 km deep · 37 km away
15. 1.920km NE of Red Bluff, CATue, May 25, 2:45 AM PDT · 1957 days ago · 10 km deep · 24 km away
16. 1.65km N of Millville, CAThu, May 27, 4:43 AM PDT · 1955 days ago · 14 km deep · 11 km away
17. 1.74km NNE of Canyondam, CATue, Jun 1, 10:07 AM PDT · 1950 days ago · 8 km deep · 95 km away
18. 1.63km ENE of Prattville, CAFri, Jun 4, 6:17 PM PDT · 1947 days ago · 7 km deep · 88 km away
19. 2.32km N of Canyondam, CAWed, Jun 9, 4:56 PM PDT · 1942 days ago · 5 km deep · 94 km away
20. 2.14km SSW of East Shore, CAWed, Jun 9, 6:25 PM PDT · 1942 days ago · 5 km deep · 92 km away
21. 2.02km SW of McArthur, CASat, Jun 12, 1:04 PM PDT · 1939 days ago · 12 km deep · 79 km away
22. 2.112km NNE of Shasta Lake, CASun, Jun 13, 4:11 AM PDT · 1938 days ago · 21 km deep · 33 km away
23. 1.56km NNE of Millville, CATue, Jun 15, 10:06 AM PDT · 1936 days ago · 12 km deep · 10 km away
24. 1.51km WSW of Canyondam, CATue, Jun 15, 1:00 PM PDT · 1936 days ago · 10 km deep · 94 km away
25. 1.613km SW of Almanor, CAWed, Jun 16, 7:58 PM PDT · 1935 days ago · 9 km deep · 79 km away
26. 1.62km E of Palo Cedro, CAFri, Jun 18, 6:32 AM PDT · 1933 days ago · 6 km deep · 12 km away
27. 1.514km WSW of Almanor, CAFri, Jun 18, 1:55 PM PDT · 1933 days ago · 11 km deep · 77 km away
28. 1.514km N of Shingletown, CASun, Jun 20, 6:25 PM PDT · 1931 days ago · 12 km deep · 18 km away

Before

1. 2.141km NE of Covelo, CATue, Apr 20, 10:15 AM PDT · 1992 days ago · 9 km deep · 89 km away
2. 2.338km NNE of Covelo, CASat, Apr 17, 1:39 PM PDT · 1995 days ago · 40 km deep · 95 km away
3. 2.940km NNE of Covelo, CASat, Apr 17, 12:35 PM PDT · 1995 days ago · 46 km deep · 94 km away · felt by 1
4. 2.741km NNE of Covelo, CASat, Apr 17, 9:29 AM PDT · 1995 days ago · 45 km deep · 93 km away
5. 2.27km NNW of Hayfork, CAFri, Apr 16, 10:48 PM PDT · 1996 days ago · 32 km deep · 95 km away
6. 2.19km NNE of Burney, CAFri, Apr 16, 11:47 AM PDT · 1996 days ago · 13 km deep · 61 km away
7. 1.814km NNW of Viola, CAWed, Apr 14, 12:29 PM PDT · 1998 days ago · 0 km deep · 31 km away
8. 1.921km SE of Anderson, CAWed, Apr 14, 10:41 AM PDT · 1998 days ago · 12 km deep · 22 km away
9. 1.623km N of Shasta Lake, CAMon, Apr 12, 12:22 AM PDT · 2001 days ago · 9 km deep · 46 km away
10. 2.39km ENE of Viola, CASun, Apr 11, 8:30 PM PDT · 2001 days ago · 3 km deep · 43 km away
11. 2.23km ENE of Canyondam, CASat, Apr 10, 1:16 AM PDT · 2003 days ago · 5 km deep · 96 km away
12. 2.326km S of Hayfork, CAFri, Apr 9, 4:12 PM PDT · 2003 days ago · 38 km deep · 99 km away
13. 2.02km ENE of Montgomery Creek, CAFri, Apr 9, 6:08 AM PDT · 2003 days ago · 15 km deep · 38 km away
14. 1.928km N of Shasta Lake, CAThu, Apr 8, 9:43 PM PDT · 2004 days ago · 15 km deep · 50 km away
15. 2.07km ESE of McCloud, CAWed, Apr 7, 7:24 AM PDT · 2005 days ago · 8 km deep · 77 km away
16. 1.730km NNW of Forest Ranch, CATue, Apr 6, 5:59 AM PDT · 2006 days ago · 16 km deep · 51 km away
17. 1.84km SSE of Hamilton City, CAMon, Apr 5, 4:26 AM PDT · 2007 days ago · 16 km deep · 93 km away
18. 1.95km NNE of Almanor, CAMon, Apr 5, 3:10 AM PDT · 2007 days ago · 7 km deep · 85 km away
19. 2.227km WSW of Rancho Tehama Reserve, CASun, Apr 4, 7:10 PM PDT · 2008 days ago · 9 km deep · 83 km away
20. 2.214km NNE of Mineral, CASun, Apr 4, 9:38 AM PDT · 2008 days ago · 3 km deep · 49 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73553120. Read Sat, Oct 3, 2026, 8:53 PM UTC.