M2.1 earthquake 15km NW of Petrolia, CA

Magnitude

2.1 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Apr 9, 2021, 3:10 AM PDT

UTC

2021-04-09 10:10:56 UTC

Depth

18.6 km (11.6 mi), shallow

Epicenter

40.414° N, 124.420° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.2 km in depth

Magnitude uncertainty

±0.28

Depth from

From location

Station coverage gap

239°, poorly surrounded by stations

Stations used

19

• Ferndale, CaliforniaPopulation 1,369. Forecast22 kmSW
• Fortuna, CaliforniaPopulation 12,000. Forecast30 kmSW
• Chico, CaliforniaPopulation 121,345. Forecast233 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast894 kmNW

After

1. 1.929km NE of Redway, CAFri, Apr 9, 3:30 AM PDT · 2004 days ago · 4 km deep · 72 km away
2. 1.835km S of Willow Creek, CASat, Apr 10, 3:54 AM PDT · 2003 days ago · 24 km deep · 70 km away
3. 1.910km S of Petrolia, CASun, Apr 11, 12:59 PM PDT · 2002 days ago · 7 km deep · 23 km away
4. 2.630km WNW of Petrolia, CATue, Apr 13, 9:39 PM PDT · 1999 days ago · 25 km deep · 17 km away
5. 2.129km W of Petrolia, CAWed, Apr 14, 1:37 AM PDT · 1999 days ago · 18 km deep · 22 km away
6. 2.516km WSW of Petrolia, CAThu, Apr 15, 12:58 AM PDT · 1998 days ago · 13 km deep · 16 km away
7. 3.517km WNW of Petrolia, CAThu, Apr 15, 9:09 PM PDT · 1997 days ago · 20 km deep · 3 km away · felt by 17
8. 1.815km WSW of Petrolia, CASat, Apr 17, 1:43 AM PDT · 1996 days ago · 15 km deep · 13 km away
9. 2.638km WNW of Petrolia, CASun, Apr 18, 4:46 PM PDT · 1994 days ago · 24 km deep · 25 km away
10. 2.528km W of Petrolia, CASun, Apr 18, 10:59 PM PDT · 1994 days ago · 20 km deep · 20 km away
11. 4.020km ENE of Redway, CATue, Apr 20, 2:48 AM PDT · 1993 days ago · 34 km deep · 74 km away · felt by 26
12. 2.718km W of Petrolia, CATue, Apr 20, 7:08 AM PDT · 1993 days ago · 23 km deep · 13 km away · felt by 1
13. 2.510km WNW of Humboldt Hill, CAWed, Apr 21, 9:58 PM PDT · 1991 days ago · 25 km deep · 38 km away
14. 1.614km SW of Ferndale, CAFri, Apr 23, 7:32 PM PDT · 1989 days ago · 20 km deep · 8 km away
15. 2.07km N of Ferndale, CAFri, Apr 23, 11:14 PM PDT · 1989 days ago · 9 km deep · 28 km away
16. 2.781km W of Petrolia, CASat, Apr 24, 3:21 AM PDT · 1989 days ago · 10 km deep · 69 km away · felt by 1
17. 2.116km E of Petrolia, CASat, Apr 24, 5:32 PM PDT · 1988 days ago · 31 km deep · 28 km away
18. 1.623km W of Petrolia, CASun, Apr 25, 11:32 PM PDT · 1987 days ago · 21 km deep · 17 km away
19. 2.523km W of Petrolia, CAWed, Apr 28, 2:56 AM PDT · 1985 days ago · 22 km deep · 17 km away
20. 2.632km WNW of Ferndale, CAWed, Apr 28, 12:33 PM PDT · 1985 days ago · 23 km deep · 35 km away · felt by 2
21. 1.924km WNW of Petrolia, CAThu, Apr 29, 9:01 PM PDT · 1983 days ago · 21 km deep · 11 km away
22. 2.584km WNW of Ferndale, CASat, May 1, 11:30 PM PDT · 1981 days ago · 5 km deep · 81 km away · felt by 1
23. 1.818km WNW of Ferndale, CASun, May 2, 5:53 AM PDT · 1981 days ago · 10 km deep · 28 km away
24. 2.811km NW of Eureka, CATue, May 4, 12:37 AM PDT · 1979 days ago · 24 km deep · 50 km away · felt by 66
25. 2.31km N of Redway, CATue, May 4, 5:49 AM PDT · 1979 days ago · 26 km deep · 60 km away
26. 2.835km WNW of Petrolia, CATue, May 4, 2:38 PM PDT · 1978 days ago · 23 km deep · 22 km away
27. 2.531km WNW of Petrolia, CAWed, May 5, 2:30 PM PDT · 1977 days ago · 22 km deep · 18 km away · felt by 1
28. 1.714km WSW of Petrolia, CAThu, May 6, 3:51 AM PDT · 1977 days ago · 13 km deep · 13 km away
29. 1.813km W of Petrolia, CAFri, May 7, 2:50 AM PDT · 1976 days ago · 19 km deep · 8 km away
30. 2.219km SSE of Rio Dell, CAFri, May 7, 9:31 AM PDT · 1976 days ago · 30 km deep · 34 km away
31. 2.510km NNW of Petrolia, CASat, May 8, 1:29 AM PDT · 1975 days ago · 29 km deep · 6 km away · felt by 1
32. 2.423km W of Petrolia, CASun, May 9, 9:44 AM PDT · 1974 days ago · 21 km deep · 18 km away
33. 2.713km NW of Petrolia, CAWed, May 12, 12:11 AM PDT · 1971 days ago · 17 km deep · 3 km away · felt by 1
34. 2.326km N of Laytonville, CAWed, May 12, 12:53 AM PDT · 1971 days ago · 8 km deep · 95 km away
35. 1.926km N of Laytonville, CAWed, May 12, 1:04 AM PDT · 1971 days ago · 9 km deep · 95 km away
36. 1.812km SE of Petrolia, CAWed, May 12, 2:55 AM PDT · 1971 days ago · 11 km deep · 27 km away
37. 2.110km SSW of Ferndale, CAWed, May 12, 11:32 AM PDT · 1971 days ago · 18 km deep · 14 km away
38. 2.849km W of Ferndale, CAThu, May 13, 6:53 PM PDT · 1969 days ago · 24 km deep · 43 km away · felt by 3
39. 2.71km NNE of Humboldt Hill, CAFri, May 14, 8:02 PM PDT · 1968 days ago · 5 km deep · 41 km away · felt by 199
40. 2.98km W of Redway, CASun, May 16, 6:26 AM PDT · 1967 days ago · 19 km deep · 53 km away · felt by 4
41. 1.88km W of Redway, CASun, May 16, 8:07 AM PDT · 1967 days ago · 18 km deep · 53 km away
42. 2.88km W of Redway, CASun, May 16, 11:36 PM PDT · 1966 days ago · 18 km deep · 53 km away · felt by 5
43. 2.813km W of Petrolia, CAMon, May 17, 12:09 AM PDT · 1966 days ago · 16 km deep · 12 km away · felt by 1
44. 2.515km WSW of Petrolia, CAMon, May 17, 2:39 AM PDT · 1966 days ago · 20 km deep · 14 km away
45. 2.412km W of Petrolia, CAMon, May 17, 8:58 AM PDT · 1966 days ago · 15 km deep · 12 km away
46. 2.223km W of Petrolia, CATue, May 18, 12:09 AM PDT · 1965 days ago · 19 km deep · 17 km away
47. 1.614km WSW of Petrolia, CATue, May 18, 5:05 AM PDT · 1965 days ago · 12 km deep · 14 km away
48. 1.816km W of Petrolia, CATue, May 18, 11:56 AM PDT · 1965 days ago · 10 km deep · 13 km away
49. 2.420km NW of Bayview, CAThu, May 20, 5:19 PM PDT · 1962 days ago · 22 km deep · 53 km away
50. 2.931km WNW of Petrolia, CASat, May 22, 4:14 PM PDT · 1960 days ago · 22 km deep · 19 km away
51. 2.544km W of Ferndale, CAMon, May 24, 12:15 AM PDT · 1959 days ago · 18 km deep · 38 km away
52. 2.23km NW of Willow Creek, CAMon, May 24, 2:09 AM PDT · 1959 days ago · 23 km deep · 89 km away
53. 1.635km E of Hydesville, CAWed, May 26, 11:18 PM PDT · 1956 days ago · 24 km deep · 63 km away
54. 1.717km E of Petrolia, CAThu, May 27, 2:53 AM PDT · 1956 days ago · 27 km deep · 31 km away
55. 2.522km W of Petrolia, CASat, May 29, 9:34 AM PDT · 1954 days ago · 21 km deep · 16 km away · felt by 1
56. 2.836km WNW of Petrolia, CATue, Jun 1, 8:27 AM PDT · 1951 days ago · 20 km deep · 23 km away
57. 2.130km NE of Redway, CAWed, Jun 2, 4:00 AM PDT · 1950 days ago · 23 km deep · 73 km away
58. 2.815km WNW of Willow Creek, CAThu, Jun 3, 12:34 PM PDT · 1949 days ago · 23 km deep · 82 km away
59. 2.216km W of Petrolia, CAFri, Jun 4, 3:57 PM PDT · 1947 days ago · 15 km deep · 14 km away
60. 2.121km W of Petrolia, CASat, Jun 5, 4:47 PM PDT · 1946 days ago · 18 km deep · 17 km away

The first 60 of 63.

Before

1. 2.925km W of Petrolia, CAThu, Apr 8, 7:07 PM PDT · 2004 days ago · 13 km deep · 19 km away
2. 2.514km SE of Petrolia, CAThu, Apr 8, 5:39 PM PDT · 2004 days ago · 12 km deep · 30 km away
3. 2.518km WNW of Petrolia, CAThu, Apr 8, 2:40 PM PDT · 2004 days ago · 28 km deep · 6 km away
4. 2.974km W of Petrolia, CAMon, Apr 5, 5:50 PM PDT · 2007 days ago · 10 km deep · 64 km away
5. 3.027km W of Petrolia, CAMon, Apr 5, 1:27 PM PDT · 2007 days ago · 19 km deep · 19 km away · felt by 3
6. 2.421km W of Petrolia, CAMon, Apr 5, 4:42 AM PDT · 2008 days ago · 20 km deep · 16 km away · felt by 1
7. 1.827km SSE of Blue Lake, CASun, Apr 4, 1:06 PM PDT · 2009 days ago · 26 km deep · 58 km away
8. 2.019km NE of Redway, CASun, Apr 4, 4:22 AM PDT · 2009 days ago · 30 km deep · 65 km away
9. 2.219km W of Petrolia, CASun, Apr 4, 12:50 AM PDT · 2009 days ago · 19 km deep · 14 km away
10. 2.024km W of Petrolia, CAFri, Apr 2, 5:52 AM PDT · 2011 days ago · 20 km deep · 18 km away
11. 1.925km W of Petrolia, CAFri, Apr 2, 2:31 AM PDT · 2011 days ago · 18 km deep · 19 km away
12. 2.534km W of Petrolia, CAFri, Apr 2, 2:19 AM PDT · 2011 days ago · 15 km deep · 26 km away
13. 4.427km W of Petrolia, CAFri, Apr 2, 1:21 AM PDT · 2011 days ago · 19 km deep · 20 km away · felt by 46
14. 1.626km N of Laytonville, CAThu, Apr 1, 9:43 PM PDT · 2011 days ago · 7 km deep · 95 km away
15. 1.614km SW of Ferndale, CAThu, Apr 1, 4:43 PM PDT · 2011 days ago · 19 km deep · 9 km away
16. 2.827km WNW of Petrolia, CAThu, Apr 1, 8:22 AM PDT · 2012 days ago · 25 km deep · 13 km away
17. 2.28km SSE of Ferndale, CAWed, Mar 31, 2:14 PM PDT · 2012 days ago · 25 km deep · 19 km away
18. 1.67km SSW of Petrolia, CAWed, Mar 31, 2:52 AM PDT · 2013 days ago · 20 km deep · 18 km away
19. 2.9104km W of Petrolia, CAWed, Mar 31, 2:26 AM PDT · 2013 days ago · 16 km deep · 92 km away
20. 4.776km W of Petrolia, CATue, Mar 30, 8:51 AM PDT · 2014 days ago · 10 km deep · 65 km away · felt by 17

From the USGS Earthquake Hazards Program and its partner networks, event nc73547145. Read Sun, Oct 4, 2026, 7:56 AM UTC.