M1.6 earthquake 14km SW of Ferndale, CA

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Apr 23, 2021, 7:32 PM PDT

UTC

2021-04-24 02:32:30 UTC

Depth

19.6 km (12.2 mi), shallow

Epicenter

40.474° N, 124.372° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.7 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

205°, poorly surrounded by stations

Stations used

15

• Ferndale, CaliforniaPopulation 1,369. Forecast15 kmSW
• Fortuna, CaliforniaPopulation 12,000. Forecast23 kmSW
• Chico, CaliforniaPopulation 121,345. Forecast231 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast896 kmNW

After

1. 2.07km N of Ferndale, CAFri, Apr 23, 11:14 PM PDT · 1990 days ago · 9 km deep · 20 km away
2. 2.781km W of Petrolia, CASat, Apr 24, 3:21 AM PDT · 1990 days ago · 10 km deep · 74 km away · felt by 1
3. 2.116km E of Petrolia, CASat, Apr 24, 5:32 PM PDT · 1989 days ago · 31 km deep · 27 km away
4. 1.623km W of Petrolia, CASun, Apr 25, 11:32 PM PDT · 1988 days ago · 21 km deep · 25 km away
5. 2.523km W of Petrolia, CAWed, Apr 28, 2:56 AM PDT · 1986 days ago · 22 km deep · 25 km away
6. 2.632km WNW of Ferndale, CAWed, Apr 28, 12:33 PM PDT · 1985 days ago · 23 km deep · 31 km away · felt by 2
7. 1.924km WNW of Petrolia, CAThu, Apr 29, 9:01 PM PDT · 1984 days ago · 21 km deep · 17 km away
8. 2.584km WNW of Ferndale, CASat, May 1, 11:30 PM PDT · 1982 days ago · 5 km deep · 81 km away · felt by 1
9. 1.818km WNW of Ferndale, CASun, May 2, 5:53 AM PDT · 1981 days ago · 10 km deep · 22 km away
10. 2.811km NW of Eureka, CATue, May 4, 12:37 AM PDT · 1980 days ago · 24 km deep · 43 km away · felt by 66
11. 2.31km N of Redway, CATue, May 4, 5:49 AM PDT · 1979 days ago · 26 km deep · 61 km away
12. 2.835km WNW of Petrolia, CATue, May 4, 2:38 PM PDT · 1979 days ago · 23 km deep · 27 km away
13. 2.531km WNW of Petrolia, CAWed, May 5, 2:30 PM PDT · 1978 days ago · 22 km deep · 23 km away · felt by 1
14. 1.714km WSW of Petrolia, CAThu, May 6, 3:51 AM PDT · 1978 days ago · 13 km deep · 21 km away
15. 1.813km W of Petrolia, CAFri, May 7, 2:50 AM PDT · 1977 days ago · 19 km deep · 15 km away
16. 2.219km SSE of Rio Dell, CAFri, May 7, 9:31 AM PDT · 1976 days ago · 30 km deep · 33 km away
17. 2.510km NNW of Petrolia, CASat, May 8, 1:29 AM PDT · 1976 days ago · 29 km deep · 8 km away · felt by 1
18. 2.423km W of Petrolia, CASun, May 9, 9:44 AM PDT · 1974 days ago · 21 km deep · 26 km away
19. 2.713km NW of Petrolia, CAWed, May 12, 12:11 AM PDT · 1972 days ago · 17 km deep · 10 km away · felt by 1
20. 2.326km N of Laytonville, CAWed, May 12, 12:53 AM PDT · 1972 days ago · 8 km deep · 96 km away
21. 1.926km N of Laytonville, CAWed, May 12, 1:04 AM PDT · 1972 days ago · 9 km deep · 96 km away
22. 1.812km SE of Petrolia, CAWed, May 12, 2:55 AM PDT · 1972 days ago · 11 km deep · 30 km away
23. 2.110km SSW of Ferndale, CAWed, May 12, 11:32 AM PDT · 1971 days ago · 18 km deep · 7 km away
24. 2.849km W of Ferndale, CAThu, May 13, 6:53 PM PDT · 1970 days ago · 24 km deep · 43 km away · felt by 3
25. 2.71km NNE of Humboldt Hill, CAFri, May 14, 8:02 PM PDT · 1969 days ago · 5 km deep · 33 km away · felt by 199
26. 2.98km W of Redway, CASun, May 16, 6:26 AM PDT · 1967 days ago · 19 km deep · 55 km away · felt by 4
27. 1.88km W of Redway, CASun, May 16, 8:07 AM PDT · 1967 days ago · 18 km deep · 54 km away
28. 2.88km W of Redway, CASun, May 16, 11:36 PM PDT · 1967 days ago · 18 km deep · 55 km away · felt by 5
29. 2.813km W of Petrolia, CAMon, May 17, 12:09 AM PDT · 1967 days ago · 16 km deep · 19 km away · felt by 1
30. 2.515km WSW of Petrolia, CAMon, May 17, 2:39 AM PDT · 1967 days ago · 20 km deep · 22 km away
31. 2.412km W of Petrolia, CAMon, May 17, 8:58 AM PDT · 1966 days ago · 15 km deep · 19 km away
32. 2.223km W of Petrolia, CATue, May 18, 12:09 AM PDT · 1966 days ago · 19 km deep · 25 km away
33. 1.614km WSW of Petrolia, CATue, May 18, 5:05 AM PDT · 1965 days ago · 12 km deep · 21 km away
34. 1.816km W of Petrolia, CATue, May 18, 11:56 AM PDT · 1965 days ago · 10 km deep · 21 km away
35. 2.420km NW of Bayview, CAThu, May 20, 5:19 PM PDT · 1963 days ago · 22 km deep · 47 km away
36. 2.931km WNW of Petrolia, CASat, May 22, 4:14 PM PDT · 1961 days ago · 22 km deep · 24 km away
37. 2.544km W of Ferndale, CAMon, May 24, 12:15 AM PDT · 1960 days ago · 18 km deep · 38 km away
38. 2.23km NW of Willow Creek, CAMon, May 24, 2:09 AM PDT · 1960 days ago · 23 km deep · 81 km away
39. 1.635km E of Hydesville, CAWed, May 26, 11:18 PM PDT · 1957 days ago · 24 km deep · 59 km away
40. 1.717km E of Petrolia, CAThu, May 27, 2:53 AM PDT · 1957 days ago · 27 km deep · 31 km away
41. 2.522km W of Petrolia, CASat, May 29, 9:34 AM PDT · 1954 days ago · 21 km deep · 24 km away · felt by 1
42. 2.836km WNW of Petrolia, CATue, Jun 1, 8:27 AM PDT · 1951 days ago · 20 km deep · 29 km away
43. 2.130km NE of Redway, CAWed, Jun 2, 4:00 AM PDT · 1951 days ago · 23 km deep · 70 km away
44. 2.815km WNW of Willow Creek, CAThu, Jun 3, 12:34 PM PDT · 1949 days ago · 23 km deep · 74 km away
45. 2.216km W of Petrolia, CAFri, Jun 4, 3:57 PM PDT · 1948 days ago · 15 km deep · 21 km away
46. 2.121km W of Petrolia, CASat, Jun 5, 4:47 PM PDT · 1947 days ago · 18 km deep · 24 km away
47. 2.112km WNW of Petrolia, CASun, Jun 6, 3:33 AM PDT · 1947 days ago · 17 km deep · 12 km away
48. 2.132km W of Hayfork, CAMon, Jun 7, 6:49 AM PDT · 1945 days ago · 6 km deep · 69 km away
49. 1.822km NW of Petrolia, CAMon, Jun 7, 5:28 PM PDT · 1945 days ago · 20 km deep · 11 km away
50. 2.513km N of Petrolia, CAWed, Jun 9, 6:49 AM PDT · 1943 days ago · 28 km deep · 10 km away
51. 1.623km W of Petrolia, CAThu, Jun 10, 10:37 PM PDT · 1942 days ago · 15 km deep · 24 km away
52. 1.84km NW of Petrolia, CASat, Jun 12, 6:17 PM PDT · 1940 days ago · 29 km deep · 15 km away
53. 2.445km W of Ferndale, CASun, Jun 13, 2:06 PM PDT · 1939 days ago · 24 km deep · 36 km away
54. 1.714km E of Rio Dell, CAMon, Jun 14, 1:49 PM PDT · 1938 days ago · 20 km deep · 36 km away
55. 1.614km E of Rio Dell, CAMon, Jun 14, 11:49 PM PDT · 1938 days ago · 21 km deep · 36 km away
56. 1.516km WNW of Petrolia, CATue, Jun 15, 4:27 AM PDT · 1938 days ago · 16 km deep · 13 km away
57. 2.116km ESE of Willow Creek, CAWed, Jun 16, 8:03 PM PDT · 1936 days ago · 21 km deep · 90 km away
58. 2.417km NW of Petrolia, CAWed, Jun 16, 11:18 PM PDT · 1936 days ago · 23 km deep · 9 km away
59. 2.110km WSW of Petrolia, CASat, Jun 19, 2:07 AM PDT · 1934 days ago · 17 km deep · 21 km away
60. 2.842km W of Petrolia, CASun, Jun 20, 3:16 AM PDT · 1933 days ago · 19 km deep · 36 km away

The first 60 of 61.

Before

1. 2.510km WNW of Humboldt Hill, CAWed, Apr 21, 9:58 PM PDT · 1992 days ago · 25 km deep · 31 km away
2. 2.718km W of Petrolia, CATue, Apr 20, 7:08 AM PDT · 1993 days ago · 23 km deep · 21 km away · felt by 1
3. 4.020km ENE of Redway, CATue, Apr 20, 2:48 AM PDT · 1994 days ago · 34 km deep · 73 km away · felt by 26
4. 2.528km W of Petrolia, CASun, Apr 18, 10:59 PM PDT · 1995 days ago · 20 km deep · 28 km away
5. 2.638km WNW of Petrolia, CASun, Apr 18, 4:46 PM PDT · 1995 days ago · 24 km deep · 29 km away
6. 1.815km WSW of Petrolia, CASat, Apr 17, 1:43 AM PDT · 1997 days ago · 15 km deep · 21 km away
7. 2.27km NNW of Hayfork, CAFri, Apr 16, 10:48 PM PDT · 1997 days ago · 32 km deep · 100 km away
8. 3.517km WNW of Petrolia, CAThu, Apr 15, 9:09 PM PDT · 1998 days ago · 20 km deep · 10 km away · felt by 17
9. 2.516km WSW of Petrolia, CAThu, Apr 15, 12:58 AM PDT · 1999 days ago · 13 km deep · 23 km away
10. 2.129km W of Petrolia, CAWed, Apr 14, 1:37 AM PDT · 2000 days ago · 18 km deep · 29 km away
11. 2.630km WNW of Petrolia, CATue, Apr 13, 9:39 PM PDT · 2000 days ago · 25 km deep · 22 km away
12. 1.910km S of Petrolia, CASun, Apr 11, 12:59 PM PDT · 2002 days ago · 7 km deep · 27 km away
13. 1.835km S of Willow Creek, CASat, Apr 10, 3:54 AM PDT · 2004 days ago · 24 km deep · 64 km away
14. 2.326km S of Hayfork, CAFri, Apr 9, 4:12 PM PDT · 2004 days ago · 38 km deep · 99 km away
15. 1.929km NE of Redway, CAFri, Apr 9, 3:30 AM PDT · 2005 days ago · 4 km deep · 69 km away
16. 2.115km NW of Petrolia, CAFri, Apr 9, 3:10 AM PDT · 2005 days ago · 19 km deep · 8 km away
17. 2.925km W of Petrolia, CAThu, Apr 8, 7:07 PM PDT · 2005 days ago · 13 km deep · 27 km away
18. 2.514km SE of Petrolia, CAThu, Apr 8, 5:39 PM PDT · 2005 days ago · 12 km deep · 32 km away
19. 2.518km WNW of Petrolia, CAThu, Apr 8, 2:40 PM PDT · 2005 days ago · 28 km deep · 14 km away
20. 2.974km W of Petrolia, CAMon, Apr 5, 5:50 PM PDT · 2008 days ago · 10 km deep · 70 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73553660. Read Sun, Oct 4, 2026, 11:09 PM UTC.