M1.5 earthquake 9km WSW of Petrolia, CA

Magnitude

1.5 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Thu, Sep 9, 2021, 10:39 AM PDT

UTC

2021-09-09 17:39:36 UTC

Depth

20.6 km (12.8 mi), shallow

Epicenter

40.282° N, 124.370° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.6 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.04

Depth from

From location

Station coverage gap

288°, poorly surrounded by stations

Stations used

10

• Scotia, CaliforniaPopulation 850. Forecast32 kmSW
• Fortuna, CaliforniaPopulation 12,000. Forecast39 kmSSW
• Chico, CaliforniaPopulation 121,345. Forecast224 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast880 kmNW

After

1. 4.510km SW of Petrolia, CAThu, Sep 9, 2:57 PM PDT · 1851 days ago · 33 km deep · 2 km away · felt by 39
2. 2.28km WSW of Petrolia, CAThu, Sep 9, 5:03 PM PDT · 1851 days ago · 31 km deep · 1 km away
3. 1.612km ENE of Hydesville, CAFri, Sep 10, 4:08 AM PDT · 1850 days ago · 25 km deep · 48 km away
4. 2.48km WSW of Petrolia, CAFri, Sep 10, 10:06 AM PDT · 1850 days ago · 29 km deep · 3 km away
5. 2.433km WNW of Petrolia, CAFri, Sep 10, 8:00 PM PDT · 1850 days ago · 22 km deep · 28 km away
6. 2.422km N of Laytonville, CASat, Sep 11, 7:25 AM PDT · 1849 days ago · 6 km deep · 85 km away · felt by 1
7. 2.38km NW of Laytonville, CASat, Sep 11, 7:45 AM PDT · 1849 days ago · 8 km deep · 93 km away
8. 1.58km NNW of Laytonville, CASat, Sep 11, 1:23 PM PDT · 1849 days ago · 10 km deep · 92 km away
9. 2.58km SW of Petrolia, CASun, Sep 12, 6:54 AM PDT · 1848 days ago · 31 km deep · 0 km away
10. 2.325km WSW of Petrolia, CASun, Sep 12, 7:20 PM PDT · 1848 days ago · 21 km deep · 17 km away · felt by 1
11. 1.612km SE of Petrolia, CATue, Sep 14, 12:13 AM PDT · 1846 days ago · 11 km deep · 16 km away
12. 2.68km WSW of Petrolia, CAThu, Sep 16, 1:37 AM PDT · 1844 days ago · 30 km deep · 2 km away · felt by 1
13. 3.06km SSW of Petrolia, CAFri, Sep 17, 9:39 PM PDT · 1843 days ago · 20 km deep · 4 km away · felt by 7
14. 2.558km W of Petrolia, CATue, Sep 21, 10:19 AM PDT · 1839 days ago · 6 km deep · 52 km away
15. 2.359km W of Petrolia, CATue, Sep 21, 10:20 AM PDT · 1839 days ago · 11 km deep · 52 km away
16. 2.08km WSW of Petrolia, CATue, Sep 21, 5:02 PM PDT · 1839 days ago · 29 km deep · 3 km away
17. 2.510km W of Petrolia, CATue, Sep 21, 5:08 PM PDT · 1839 days ago · 28 km deep · 4 km away
18. 2.517km WSW of Petrolia, CAThu, Sep 23, 12:46 AM PDT · 1837 days ago · 21 km deep · 9 km away
19. 2.57km WSW of Petrolia, CAFri, Sep 24, 10:31 AM PDT · 1836 days ago · 21 km deep · 2 km away
20. 2.873km W of Ferndale, CASat, Sep 25, 1:18 PM PDT · 1835 days ago · 7 km deep · 76 km away · felt by 3
21. 2.021km WSW of Petrolia, CASat, Sep 25, 7:06 PM PDT · 1835 days ago · 20 km deep · 13 km away
22. 3.613km SE of Petrolia, CASun, Sep 26, 1:51 AM PDT · 1834 days ago · 12 km deep · 18 km away · felt by 12
23. 1.917km W of Humboldt Hill, CASun, Sep 26, 8:38 AM PDT · 1834 days ago · 21 km deep · 47 km away
24. 2.658km W of Petrolia, CASun, Sep 26, 12:54 PM PDT · 1834 days ago · 19 km deep · 52 km away
25. 2.713km SE of Petrolia, CAMon, Sep 27, 3:27 PM PDT · 1833 days ago · 12 km deep · 18 km away
26. 1.926km ESE of Rio Dell, CAWed, Sep 29, 8:49 AM PDT · 1831 days ago · 20 km deep · 49 km away
27. 2.87km WSW of Petrolia, CAWed, Sep 29, 11:37 PM PDT · 1830 days ago · 30 km deep · 3 km away · felt by 1
28. 2.59km SW of Petrolia, CASat, Oct 2, 1:10 AM PDT · 1828 days ago · 33 km deep · 1 km away
29. 2.314km SE of Rockport, CASat, Oct 2, 4:44 AM PDT · 1828 days ago · 0 km deep · 91 km away
30. 3.264km WNW of Petrolia, CATue, Oct 5, 8:54 AM PDT · 1825 days ago · 11 km deep · 59 km away · felt by 1
31. 2.414km SW of Ferndale, CATue, Oct 5, 11:21 AM PDT · 1825 days ago · 23 km deep · 25 km away
32. 2.018km E of Rio Dell, CAWed, Oct 6, 7:40 PM PDT · 1824 days ago · 20 km deep · 46 km away
33. 1.818km E of Rio Dell, CAThu, Oct 7, 8:37 AM PDT · 1823 days ago · 20 km deep · 45 km away
34. 2.856km W of Ferndale, CAThu, Oct 7, 6:08 PM PDT · 1823 days ago · 24 km deep · 58 km away
35. 2.757km W of Ferndale, CAFri, Oct 8, 5:06 AM PDT · 1822 days ago · 9 km deep · 58 km away
36. 1.612km SE of Petrolia, CAFri, Oct 8, 1:05 PM PDT · 1822 days ago · 11 km deep · 16 km away
37. 2.17km SSE of Pine Hills, CAFri, Oct 8, 2:39 PM PDT · 1822 days ago · 25 km deep · 49 km away
38. 2.856km W of Ferndale, CAFri, Oct 8, 8:49 PM PDT · 1822 days ago · 20 km deep · 58 km away
39. 3.818km WSW of Petrolia, CATue, Oct 12, 4:29 AM PDT · 1818 days ago · 21 km deep · 11 km away · felt by 11
40. 1.713km E of Hydesville, CAThu, Oct 14, 5:45 AM PDT · 1816 days ago · 24 km deep · 48 km away
41. 2.08km SSE of Redway, CAFri, Oct 15, 11:18 PM PDT · 1814 days ago · 17 km deep · 55 km away
42. 1.98km SSE of Redway, CAFri, Oct 15, 11:19 PM PDT · 1814 days ago · 17 km deep · 56 km away
43. 1.65km NW of Redway, CASun, Oct 17, 4:25 AM PDT · 1813 days ago · 23 km deep · 45 km away
44. 1.74km NNW of Ferndale, CASun, Oct 17, 7:20 AM PDT · 1813 days ago · 17 km deep · 38 km away
45. 1.719km WNW of Petrolia, CAMon, Oct 18, 9:54 PM PDT · 1811 days ago · 18 km deep · 16 km away
46. 2.656km W of Ferndale, CAWed, Oct 20, 12:27 PM PDT · 1810 days ago · 25 km deep · 58 km away
47. 2.212km WSW of Petrolia, CAWed, Oct 20, 7:43 PM PDT · 1810 days ago · 9 km deep · 5 km away
48. 2.923km W of Petrolia, CAThu, Oct 21, 6:10 AM PDT · 1809 days ago · 20 km deep · 15 km away · felt by 1
49. 2.426km WNW of Petrolia, CAFri, Oct 22, 9:40 PM PDT · 1808 days ago · 29 km deep · 22 km away
50. 2.114km WSW of Laytonville, CATue, Oct 26, 7:37 AM PDT · 1804 days ago · 5 km deep · 93 km away
51. 1.913km ENE of Hydesville, CAWed, Oct 27, 8:17 PM PDT · 1803 days ago · 21 km deep · 50 km away
52. 2.013km WSW of Laytonville, CASat, Oct 30, 9:01 AM PDT · 1800 days ago · 6 km deep · 94 km away
53. 2.519km W of Petrolia, CASat, Oct 30, 4:24 PM PDT · 1800 days ago · 19 km deep · 14 km away
54. 4.45km NNE of Petrolia, CATue, Nov 2, 5:24 PM PDT · 1797 days ago · 30 km deep · 13 km away · felt by 114 · tsunami flag
55. 2.34km NNE of Petrolia, CATue, Nov 2, 5:27 PM PDT · 1797 days ago · 30 km deep · 12 km away
56. 2.66km NNE of Petrolia, CATue, Nov 2, 5:39 PM PDT · 1797 days ago · 28 km deep · 14 km away · felt by 2
57. 2.56km N of Petrolia, CATue, Nov 2, 5:41 PM PDT · 1797 days ago · 29 km deep · 13 km away
58. 3.06km NNE of Petrolia, CATue, Nov 2, 6:33 PM PDT · 1797 days ago · 30 km deep · 14 km away · felt by 10
59. 2.53km N of Petrolia, CATue, Nov 2, 9:55 PM PDT · 1796 days ago · 28 km deep · 11 km away
60. 2.028km NE of Redway, CATue, Nov 2, 9:59 PM PDT · 1796 days ago · 27 km deep · 65 km away

The first 60 of 66.

Before

1. 1.97km NW of Laytonville, CATue, Sep 7, 10:57 AM PDT · 1853 days ago · 8 km deep · 93 km away
2. 2.536km W of Petrolia, CATue, Sep 7, 7:35 AM PDT · 1853 days ago · 18 km deep · 30 km away
3. 2.58km WSW of Petrolia, CASun, Sep 5, 4:22 PM PDT · 1855 days ago · 29 km deep · 1 km away
4. 1.96km WSW of Petrolia, CASat, Sep 4, 8:10 AM PDT · 1856 days ago · 28 km deep · 4 km away
5. 1.86km W of Petrolia, CASat, Sep 4, 7:15 AM PDT · 1856 days ago · 28 km deep · 4 km away
6. 2.37km W of Petrolia, CAFri, Sep 3, 3:18 PM PDT · 1857 days ago · 28 km deep · 4 km away
7. 2.650km W of Petrolia, CAFri, Sep 3, 3:25 AM PDT · 1857 days ago · 11 km deep · 44 km away
8. 2.48km W of Petrolia, CAThu, Sep 2, 4:59 PM PDT · 1858 days ago · 17 km deep · 6 km away
9. 1.819km NNW of Laytonville, CAThu, Sep 2, 8:17 AM PDT · 1858 days ago · 7 km deep · 83 km away
10. 3.511km WSW of Petrolia, CATue, Aug 31, 1:01 AM PDT · 1860 days ago · 28 km deep · 2 km away
11. 4.011km WSW of Petrolia, CATue, Aug 31, 1:01 AM PDT · 1860 days ago · 32 km deep · 3 km away · felt by 8
12. 2.422km NW of Petrolia, CAMon, Aug 30, 12:17 AM PDT · 1861 days ago · 19 km deep · 22 km away
13. 2.432km W of Hayfork, CASat, Aug 28, 8:17 PM PDT · 1863 days ago · 24 km deep · 78 km away
14. 1.712km SSW of Ferndale, CAThu, Aug 26, 12:23 PM PDT · 1865 days ago · 18 km deep · 23 km away
15. 1.712km SSW of Ferndale, CAThu, Aug 26, 11:32 AM PDT · 1865 days ago · 18 km deep · 22 km away
16. 1.67km NNW of Laytonville, CAWed, Aug 25, 10:33 AM PDT · 1866 days ago · 8 km deep · 94 km away
17. 2.44km W of Petrolia, CAWed, Aug 25, 1:42 AM PDT · 1866 days ago · 27 km deep · 6 km away
18. 1.87km W of Petrolia, CASun, Aug 22, 9:20 AM PDT · 1869 days ago · 29 km deep · 4 km away
19. 1.620km W of Petrolia, CASat, Aug 21, 8:50 PM PDT · 1870 days ago · 15 km deep · 15 km away
20. 2.955km WNW of Petrolia, CAFri, Aug 20, 11:45 AM PDT · 1871 days ago · 15 km deep · 49 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73622716. Read Sun, Oct 4, 2026, 4:19 PM UTC.