M2.4 earthquake 14km SW of Ferndale, CA

Magnitude

2.4 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Oct 5, 2021, 11:21 AM PDT

UTC

2021-10-05 18:21:53 UTC

Depth

23.2 km (14.4 mi), shallow

Epicenter

40.505° N, 124.401° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.31

Depth from

From location

Station coverage gap

226°, poorly surrounded by stations

Stations used

25

• Ferndale, CaliforniaPopulation 1,369. Forecast14 kmSW
• Fortuna, CaliforniaPopulation 12,000. Forecast23 kmWSW
• Chico, CaliforniaPopulation 121,345. Forecast235 kmWNW

After

1. 2.018km E of Rio Dell, CAWed, Oct 6, 7:40 PM PDT · 1823 days ago · 20 km deep · 43 km away
2. 1.818km E of Rio Dell, CAThu, Oct 7, 8:37 AM PDT · 1823 days ago · 20 km deep · 42 km away
3. 2.856km W of Ferndale, CAThu, Oct 7, 6:08 PM PDT · 1822 days ago · 24 km deep · 45 km away
4. 2.757km W of Ferndale, CAFri, Oct 8, 5:06 AM PDT · 1822 days ago · 9 km deep · 46 km away
5. 1.612km SE of Petrolia, CAFri, Oct 8, 1:05 PM PDT · 1822 days ago · 11 km deep · 34 km away
6. 2.17km SSE of Pine Hills, CAFri, Oct 8, 2:39 PM PDT · 1821 days ago · 25 km deep · 30 km away
7. 2.856km W of Ferndale, CAFri, Oct 8, 8:49 PM PDT · 1821 days ago · 20 km deep · 45 km away
8. 3.818km WSW of Petrolia, CATue, Oct 12, 4:29 AM PDT · 1818 days ago · 21 km deep · 25 km away · felt by 11
9. 1.713km E of Hydesville, CAThu, Oct 14, 5:45 AM PDT · 1816 days ago · 24 km deep · 39 km away
10. 2.08km SSE of Redway, CAFri, Oct 15, 11:18 PM PDT · 1814 days ago · 17 km deep · 72 km away
11. 1.98km SSE of Redway, CAFri, Oct 15, 11:19 PM PDT · 1814 days ago · 17 km deep · 72 km away
12. 1.65km NW of Redway, CASun, Oct 17, 4:25 AM PDT · 1813 days ago · 23 km deep · 61 km away
13. 1.74km NNW of Ferndale, CASun, Oct 17, 7:20 AM PDT · 1813 days ago · 17 km deep · 16 km away
14. 1.719km WNW of Petrolia, CAMon, Oct 18, 9:54 PM PDT · 1811 days ago · 18 km deep · 13 km away
15. 2.656km W of Ferndale, CAWed, Oct 20, 12:27 PM PDT · 1810 days ago · 25 km deep · 45 km away
16. 2.212km WSW of Petrolia, CAWed, Oct 20, 7:43 PM PDT · 1809 days ago · 9 km deep · 23 km away
17. 2.923km W of Petrolia, CAThu, Oct 21, 6:10 AM PDT · 1809 days ago · 20 km deep · 27 km away · felt by 1
18. 2.426km WNW of Petrolia, CAFri, Oct 22, 9:40 PM PDT · 1807 days ago · 29 km deep · 19 km away
19. 1.913km ENE of Hydesville, CAWed, Oct 27, 8:17 PM PDT · 1802 days ago · 21 km deep · 39 km away
20. 2.519km W of Petrolia, CASat, Oct 30, 4:24 PM PDT · 1799 days ago · 19 km deep · 19 km away
21. 2.58km E of Willow Creek, CATue, Nov 2, 8:03 AM PDT · 1797 days ago · 26 km deep · 88 km away
22. 4.45km NNE of Petrolia, CATue, Nov 2, 5:24 PM PDT · 1796 days ago · 30 km deep · 20 km away · felt by 114 · tsunami flag
23. 2.34km NNE of Petrolia, CATue, Nov 2, 5:27 PM PDT · 1796 days ago · 30 km deep · 20 km away
24. 2.66km NNE of Petrolia, CATue, Nov 2, 5:39 PM PDT · 1796 days ago · 28 km deep · 19 km away · felt by 2
25. 2.56km N of Petrolia, CATue, Nov 2, 5:41 PM PDT · 1796 days ago · 29 km deep · 17 km away
26. 3.06km NNE of Petrolia, CATue, Nov 2, 6:33 PM PDT · 1796 days ago · 30 km deep · 19 km away · felt by 10
27. 2.53km N of Petrolia, CATue, Nov 2, 9:55 PM PDT · 1796 days ago · 28 km deep · 20 km away
28. 2.028km NE of Redway, CATue, Nov 2, 9:59 PM PDT · 1796 days ago · 27 km deep · 72 km away
29. 1.75km NNE of Petrolia, CATue, Nov 2, 10:10 PM PDT · 1796 days ago · 28 km deep · 20 km away
30. 2.45km NNW of Petrolia, CATue, Nov 2, 10:58 PM PDT · 1796 days ago · 29 km deep · 17 km away
31. 2.48km SSE of Petrolia, CAFri, Nov 5, 10:52 AM PDT · 1794 days ago · 21 km deep · 30 km away
32. 1.86km NNE of Petrolia, CASat, Nov 6, 8:33 AM PDT · 1793 days ago · 28 km deep · 19 km away
33. 1.917km WNW of Cape Vizcaino, CASat, Nov 6, 5:47 PM PDT · 1792 days ago · 1 km deep · 87 km away
34. 2.86km NNE of Petrolia, CATue, Nov 9, 11:48 AM PST · 1790 days ago · 27 km deep · 19 km away
35. 2.96km NNE of Petrolia, CAThu, Nov 11, 5:35 AM PST · 1788 days ago · 29 km deep · 20 km away
36. 2.037km W of Petrolia, CAFri, Nov 12, 7:05 AM PST · 1787 days ago · 19 km deep · 35 km away
37. 2.212km WNW of Petrolia, CASat, Nov 13, 1:12 PM PST · 1786 days ago · 17 km deep · 16 km away
38. 1.72km N of Redway, CAFri, Nov 19, 7:08 PM PST · 1779 days ago · 22 km deep · 64 km away
39. 2.8101km W of Petrolia, CASun, Nov 21, 8:42 PM PST · 1777 days ago · 5 km deep · 92 km away
40. 3.020km W of Petrolia, CAMon, Nov 22, 1:22 PM PST · 1776 days ago · 19 km deep · 25 km away · felt by 4
41. 2.415km WSW of Petrolia, CATue, Nov 23, 12:24 AM PST · 1776 days ago · 17 km deep · 24 km away · felt by 1
42. 2.747km W of Petrolia, CATue, Nov 23, 11:11 PM PST · 1775 days ago · 12 km deep · 40 km away
43. 2.421km SSE of Willow Creek, CAWed, Nov 24, 1:26 AM PST · 1775 days ago · 21 km deep · 80 km away
44. 2.647km W of Petrolia, CAWed, Nov 24, 3:14 PM PST · 1774 days ago · 11 km deep · 39 km away
45. 2.29km ESE of Willow Creek, CAWed, Nov 24, 10:18 PM PST · 1774 days ago · 22 km deep · 85 km away
46. 2.313km SE of Petrolia, CAThu, Nov 25, 1:18 AM PST · 1774 days ago · 12 km deep · 35 km away
47. 2.615km SE of Petrolia, CAThu, Nov 25, 2:10 AM PST · 1774 days ago · 11 km deep · 36 km away · felt by 1
48. 4.194km W of Trinidad, CAFri, Nov 26, 11:35 PM PST · 1772 days ago · 24 km deep · 98 km away · felt by 4
49. 2.718km W of Petrolia, CASun, Nov 28, 8:36 PM PST · 1770 days ago · 21 km deep · 19 km away
50. 1.84km N of Hydesville, CAMon, Nov 29, 4:51 PM PST · 1769 days ago · 19 km deep · 27 km away
51. 2.774km W of Petrolia, CAMon, Nov 29, 7:14 PM PST · 1769 days ago · 9 km deep · 70 km away

Before

1. 3.264km WNW of Petrolia, CATue, Oct 5, 8:54 AM PDT · 1825 days ago · 11 km deep · 53 km away · felt by 1
2. 2.018km ESE of Willow Creek, CAMon, Oct 4, 9:05 PM PDT · 1825 days ago · 23 km deep · 92 km away
3. 2.59km SW of Petrolia, CASat, Oct 2, 1:10 AM PDT · 1828 days ago · 33 km deep · 25 km away
4. 2.87km WSW of Petrolia, CAWed, Sep 29, 11:37 PM PDT · 1830 days ago · 30 km deep · 23 km away · felt by 1
5. 1.926km ESE of Rio Dell, CAWed, Sep 29, 8:49 AM PDT · 1831 days ago · 20 km deep · 50 km away
6. 2.318km E of Willow Creek, CATue, Sep 28, 9:05 AM PDT · 1832 days ago · 25 km deep · 97 km away
7. 2.713km SE of Petrolia, CAMon, Sep 27, 3:27 PM PDT · 1832 days ago · 12 km deep · 34 km away
8. 2.658km W of Petrolia, CASun, Sep 26, 12:54 PM PDT · 1834 days ago · 19 km deep · 52 km away
9. 1.917km W of Humboldt Hill, CASun, Sep 26, 8:38 AM PDT · 1834 days ago · 21 km deep · 23 km away
10. 3.613km SE of Petrolia, CASun, Sep 26, 1:51 AM PDT · 1834 days ago · 12 km deep · 35 km away · felt by 12
11. 2.021km WSW of Petrolia, CASat, Sep 25, 7:06 PM PDT · 1834 days ago · 20 km deep · 26 km away
12. 2.873km W of Ferndale, CASat, Sep 25, 1:18 PM PDT · 1835 days ago · 7 km deep · 63 km away · felt by 3
13. 2.412km SE of Weitchpec, CASat, Sep 25, 1:54 AM PDT · 1835 days ago · 37 km deep · 96 km away
14. 2.57km WSW of Petrolia, CAFri, Sep 24, 10:31 AM PDT · 1836 days ago · 21 km deep · 24 km away
15. 2.517km WSW of Petrolia, CAThu, Sep 23, 12:46 AM PDT · 1837 days ago · 21 km deep · 25 km away
16. 2.510km W of Petrolia, CATue, Sep 21, 5:08 PM PDT · 1838 days ago · 28 km deep · 22 km away
17. 2.08km WSW of Petrolia, CATue, Sep 21, 5:02 PM PDT · 1838 days ago · 29 km deep · 22 km away
18. 2.359km W of Petrolia, CATue, Sep 21, 10:20 AM PDT · 1839 days ago · 11 km deep · 53 km away
19. 2.558km W of Petrolia, CATue, Sep 21, 10:19 AM PDT · 1839 days ago · 6 km deep · 50 km away
20. 3.06km SSW of Petrolia, CAFri, Sep 17, 9:39 PM PDT · 1842 days ago · 20 km deep · 26 km away · felt by 7

From the USGS Earthquake Hazards Program and its partner networks, event nc73633881. Read Sun, Oct 4, 2026, 8:47 AM UTC.