M1.8 earthquake 18km WSW of Almanor, CA

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Apr 23, 2021, 9:55 PM PDT

UTC

2021-04-24 04:55:57 UTC

Depth

11.5 km (7.1 mi), shallow

Epicenter

40.162° N, 121.375° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 1.3 km in depth

Magnitude uncertainty

±0.20

Depth from

From location

Station coverage gap

80°

Stations used

15

• Chester, CaliforniaPopulation 2,144. Forecast20 kmSW
• Magalia, CaliforniaPopulation 11,310. Forecast43 kmNNE
• Chico, CaliforniaPopulation 121,345. Forecast62 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast734 kmNNW

After

1. 1.922km SSW of Whitehawk, CASun, Apr 25, 11:22 AM PDT · 1987 days ago · 8 km deep · 95 km away · felt by 1
2. 2.219km WSW of Manton, CAThu, Apr 29, 12:23 AM PDT · 1983 days ago · 15 km deep · 61 km away
3. 2.72km NNW of Chico, CASat, May 1, 11:26 AM PDT · 1981 days ago · 14 km deep · 60 km away · felt by 4
4. 1.72km NE of Chester, CASun, May 9, 6:35 AM PDT · 1973 days ago · 10 km deep · 22 km away
5. 1.913km W of Shingletown, CASun, May 9, 7:01 AM PDT · 1973 days ago · 17 km deep · 67 km away
6. 1.833km NNW of Susanville, CAWed, May 12, 11:17 AM PDT · 1970 days ago · 13 km deep · 76 km away
7. 1.625km NNE of Hamilton Branch, CAWed, May 12, 7:53 PM PDT · 1969 days ago · 2 km deep · 49 km away
8. 2.01km NW of Lake Davis, CASat, May 15, 5:09 PM PDT · 1966 days ago · 4 km deep · 83 km away
9. 1.69km E of Millville, CAThu, May 20, 8:03 AM PDT · 1962 days ago · 11 km deep · 75 km away
10. 2.20km WNW of Lake Davis, CASat, May 22, 9:05 AM PDT · 1960 days ago · 3 km deep · 83 km away
11. 2.21km WNW of Lake Davis, CASat, May 22, 4:32 PM PDT · 1960 days ago · 4 km deep · 83 km away · felt by 1
12. 2.10km NE of Lake Davis, CASat, May 22, 5:26 PM PDT · 1959 days ago · 5 km deep · 84 km away
13. 2.50km NW of Lake Davis, CASat, May 22, 6:10 PM PDT · 1959 days ago · 3 km deep · 83 km away · felt by 2
14. 2.40km NNW of Lake Davis, CASat, May 22, 6:58 PM PDT · 1959 days ago · 4 km deep · 83 km away · felt by 2
15. 3.00km NNW of Lake Davis, CASun, May 23, 2:18 AM PDT · 1959 days ago · 4 km deep · 83 km away · felt by 35
16. 2.80km ESE of Lake Davis, CASun, May 23, 2:18 AM PDT · 1959 days ago · 4 km deep · 84 km away · felt by 5
17. 2.21km WNW of Lake Davis, CASun, May 23, 4:42 AM PDT · 1959 days ago · -2 km deep · 82 km away
18. 2.80km N of Lake Davis, CASun, May 23, 10:20 AM PDT · 1959 days ago · 4 km deep · 83 km away · felt by 14
19. 2.01km NW of Lake Davis, CASun, May 23, 4:10 PM PDT · 1959 days ago · 5 km deep · 83 km away
20. 2.11km WNW of Lake Davis, CAMon, May 24, 7:15 AM PDT · 1958 days ago · -1 km deep · 82 km away
21. 2.41km NW of Lake Davis, CAMon, May 24, 8:29 AM PDT · 1958 days ago · 3 km deep · 83 km away · felt by 2
22. 2.51km NW of Lake Davis, CAMon, May 24, 9:41 AM PDT · 1958 days ago · 4 km deep · 83 km away · felt by 5
23. 2.114km SE of Honey Lake, CAMon, May 24, 11:33 AM PDT · 1958 days ago · 12 km deep · 99 km away · felt by 1
24. 1.920km NE of Red Bluff, CATue, May 25, 2:45 AM PDT · 1957 days ago · 10 km deep · 63 km away
25. 1.67 km ENE of Cromberg, CaliforniaTue, May 25, 12:03 PM PDT · 1957 days ago · 7 km deep · 71 km away
26. 1.65km N of Millville, CAThu, May 27, 4:43 AM PDT · 1955 days ago · 14 km deep · 85 km away
27. 2.60km W of Lake Davis, CAThu, May 27, 5:27 PM PDT · 1954 days ago · 3 km deep · 83 km away · felt by 3
28. 1.74km NNE of Canyondam, CATue, Jun 1, 10:07 AM PDT · 1950 days ago · 8 km deep · 28 km away
29. 1.63km ENE of Prattville, CAFri, Jun 4, 6:17 PM PDT · 1946 days ago · 7 km deep · 22 km away
30. 1.914km SSW of Hamilton City, CATue, Jun 8, 3:17 AM PDT · 1943 days ago · 16 km deep · 84 km away
31. 1.815km SSW of Hamilton City, CATue, Jun 8, 3:19 AM PDT · 1943 days ago · 20 km deep · 84 km away
32. 1.80 km S of Lake Davis, CaliforniaWed, Jun 9, 2:36 AM PDT · 1942 days ago · 7 km deep · 83 km away
33. 2.32km N of Canyondam, CAWed, Jun 9, 4:56 PM PDT · 1941 days ago · 5 km deep · 25 km away
34. 2.14km SSW of East Shore, CAWed, Jun 9, 6:25 PM PDT · 1941 days ago · 5 km deep · 25 km away
35. 2.215km E of Willows, CAWed, Jun 9, 9:00 PM PDT · 1941 days ago · 23 km deep · 90 km away
36. 2.02km SW of McArthur, CASat, Jun 12, 1:04 PM PDT · 1939 days ago · 12 km deep · 97 km away
37. 1.56km NNE of Millville, CATue, Jun 15, 10:06 AM PDT · 1936 days ago · 12 km deep · 83 km away
38. 1.51km WSW of Canyondam, CATue, Jun 15, 1:00 PM PDT · 1936 days ago · 10 km deep · 24 km away
39. 1.613km SW of Almanor, CAWed, Jun 16, 7:58 PM PDT · 1934 days ago · 9 km deep · 6 km away
40. 1.62km E of Palo Cedro, CAFri, Jun 18, 6:32 AM PDT · 1933 days ago · 6 km deep · 84 km away
41. 1.514km WSW of Almanor, CAFri, Jun 18, 1:55 PM PDT · 1933 days ago · 11 km deep · 4 km away
42. 1.514km N of Shingletown, CASun, Jun 20, 6:25 PM PDT · 1930 days ago · 12 km deep · 68 km away
43. 1.69km N of Biggs, CAMon, Jun 21, 2:54 PM PDT · 1930 days ago · 3 km deep · 80 km away
44. 2.111km W of Almanor, CAMon, Jun 21, 10:22 PM PDT · 1929 days ago · 5 km deep · 8 km away
45. 2.110km W of Almanor, CATue, Jun 22, 3:26 PM PDT · 1929 days ago · 8 km deep · 9 km away

Before

1. 2.010km WNW of Viola, CAFri, Apr 23, 10:08 AM PDT · 1989 days ago · 10 km deep · 57 km away
2. 1.89km ESE of Millville, CAThu, Apr 22, 1:19 PM PDT · 1990 days ago · 16 km deep · 73 km away
3. 2.815km E of Willows, CAMon, Apr 19, 9:25 PM PDT · 1992 days ago · 23 km deep · 91 km away · felt by 4
4. 3.815km E of Willows, CAMon, Apr 19, 7:39 PM PDT · 1992 days ago · 23 km deep · 90 km away · felt by 167
5. 2.19km NNE of Burney, CAFri, Apr 16, 11:47 AM PDT · 1996 days ago · 13 km deep · 92 km away
6. 1.814km NNW of Viola, CAWed, Apr 14, 12:29 PM PDT · 1998 days ago · 0 km deep · 61 km away
7. 1.921km SE of Anderson, CAWed, Apr 14, 10:41 AM PDT · 1998 days ago · 12 km deep · 65 km away
8. 2.39km ENE of Viola, CASun, Apr 11, 8:30 PM PDT · 2000 days ago · 3 km deep · 45 km away
9. 2.23km ENE of Canyondam, CASat, Apr 10, 1:16 AM PDT · 2002 days ago · 5 km deep · 28 km away
10. 2.02km ENE of Montgomery Creek, CAFri, Apr 9, 6:08 AM PDT · 2003 days ago · 15 km deep · 88 km away
11. 1.730km NNW of Forest Ranch, CATue, Apr 6, 5:59 AM PDT · 2006 days ago · 16 km deep · 35 km away
12. 1.84km SSE of Hamilton City, CAMon, Apr 5, 4:26 AM PDT · 2007 days ago · 16 km deep · 74 km away
13. 1.95km NNE of Almanor, CAMon, Apr 5, 3:10 AM PDT · 2007 days ago · 7 km deep · 22 km away
14. 2.214km NNE of Mineral, CASun, Apr 4, 9:38 AM PDT · 2008 days ago · 3 km deep · 37 km away
15. 1.814km NNE of Mineral, CASun, Apr 4, 9:32 AM PDT · 2008 days ago · 3 km deep · 37 km away
16. 1.66km WNW of Palo Cedro, CASun, Apr 4, 5:29 AM PDT · 2008 days ago · 15 km deep · 92 km away
17. 1.512km W of Shingletown, CASun, Apr 4, 2:52 AM PDT · 2008 days ago · 17 km deep · 66 km away
18. 3.013km W of Shingletown, CAWed, Mar 31, 11:03 PM PDT · 2011 days ago · 19 km deep · 66 km away · felt by 77
19. 2.03km WSW of Whitehawk, CAWed, Mar 31, 6:09 PM PDT · 2011 days ago · 9 km deep · 84 km away
20. 1.72 km ENE of East Quincy, CaliforniaTue, Mar 30, 12:10 AM PDT · 2013 days ago · 15 km deep · 50 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73553700. Read Sat, Oct 3, 2026, 11:17 AM UTC.