M1.7 earthquake 12km SSW of Ferndale, CA

Magnitude

1.7 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Thu, Aug 26, 2021, 12:23 PM PDT

UTC

2021-08-26 19:23:59 UTC

Depth

18.1 km (11.2 mi), shallow

Epicenter

40.481° N, 124.322° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.11

Depth from

From location

Station coverage gap

191°, poorly surrounded by stations

Stations used

21

• Ferndale, CaliforniaPopulation 1,369. Forecast12 kmSSW
• Fortuna, CaliforniaPopulation 12,000. Forecast19 kmSW
• Chico, CaliforniaPopulation 121,345. Forecast227 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast894 kmNW

After

1. 2.432km W of Hayfork, CASat, Aug 28, 8:17 PM PDT · 1862 days ago · 24 km deep · 66 km away
2. 2.422km NW of Petrolia, CAMon, Aug 30, 12:17 AM PDT · 1861 days ago · 19 km deep · 14 km away
3. 4.011km WSW of Petrolia, CATue, Aug 31, 1:01 AM PDT · 1860 days ago · 32 km deep · 23 km away · felt by 8
4. 3.511km WSW of Petrolia, CATue, Aug 31, 1:01 AM PDT · 1860 days ago · 28 km deep · 24 km away
5. 1.819km NNW of Laytonville, CAThu, Sep 2, 8:17 AM PDT · 1858 days ago · 7 km deep · 95 km away
6. 2.48km W of Petrolia, CAThu, Sep 2, 4:59 PM PDT · 1858 days ago · 17 km deep · 17 km away
7. 2.650km W of Petrolia, CAFri, Sep 3, 3:25 AM PDT · 1857 days ago · 11 km deep · 47 km away
8. 2.37km W of Petrolia, CAFri, Sep 3, 3:18 PM PDT · 1857 days ago · 28 km deep · 19 km away
9. 1.86km W of Petrolia, CASat, Sep 4, 7:15 AM PDT · 1856 days ago · 28 km deep · 19 km away
10. 1.96km WSW of Petrolia, CASat, Sep 4, 8:10 AM PDT · 1856 days ago · 28 km deep · 19 km away
11. 2.58km WSW of Petrolia, CASun, Sep 5, 4:22 PM PDT · 1855 days ago · 29 km deep · 22 km away
12. 2.536km W of Petrolia, CATue, Sep 7, 7:35 AM PDT · 1853 days ago · 18 km deep · 36 km away
13. 1.59km WSW of Petrolia, CAThu, Sep 9, 10:39 AM PDT · 1851 days ago · 21 km deep · 23 km away
14. 4.510km SW of Petrolia, CAThu, Sep 9, 2:57 PM PDT · 1851 days ago · 33 km deep · 24 km away · felt by 39
15. 2.28km WSW of Petrolia, CAThu, Sep 9, 5:03 PM PDT · 1851 days ago · 31 km deep · 22 km away
16. 1.612km ENE of Hydesville, CAFri, Sep 10, 4:08 AM PDT · 1850 days ago · 25 km deep · 32 km away
17. 2.48km WSW of Petrolia, CAFri, Sep 10, 10:06 AM PDT · 1850 days ago · 29 km deep · 20 km away
18. 2.433km WNW of Petrolia, CAFri, Sep 10, 8:00 PM PDT · 1849 days ago · 22 km deep · 31 km away
19. 2.422km N of Laytonville, CASat, Sep 11, 7:25 AM PDT · 1849 days ago · 6 km deep · 95 km away · felt by 1
20. 2.58km SW of Petrolia, CASun, Sep 12, 6:54 AM PDT · 1848 days ago · 31 km deep · 23 km away
21. 2.325km WSW of Petrolia, CASun, Sep 12, 7:20 PM PDT · 1848 days ago · 21 km deep · 33 km away · felt by 1
22. 1.612km SE of Petrolia, CATue, Sep 14, 12:13 AM PDT · 1846 days ago · 11 km deep · 29 km away
23. 2.68km WSW of Petrolia, CAThu, Sep 16, 1:37 AM PDT · 1844 days ago · 30 km deep · 21 km away · felt by 1
24. 3.06km SSW of Petrolia, CAFri, Sep 17, 9:39 PM PDT · 1842 days ago · 20 km deep · 23 km away · felt by 7
25. 2.558km W of Petrolia, CATue, Sep 21, 10:19 AM PDT · 1839 days ago · 6 km deep · 56 km away
26. 2.359km W of Petrolia, CATue, Sep 21, 10:20 AM PDT · 1839 days ago · 11 km deep · 59 km away
27. 2.08km WSW of Petrolia, CATue, Sep 21, 5:02 PM PDT · 1839 days ago · 29 km deep · 20 km away
28. 2.510km W of Petrolia, CATue, Sep 21, 5:08 PM PDT · 1839 days ago · 28 km deep · 20 km away
29. 2.517km WSW of Petrolia, CAThu, Sep 23, 12:46 AM PDT · 1837 days ago · 21 km deep · 25 km away
30. 2.57km WSW of Petrolia, CAFri, Sep 24, 10:31 AM PDT · 1836 days ago · 21 km deep · 21 km away
31. 2.412km SE of Weitchpec, CASat, Sep 25, 1:54 AM PDT · 1835 days ago · 37 km deep · 94 km away
32. 2.873km W of Ferndale, CASat, Sep 25, 1:18 PM PDT · 1835 days ago · 7 km deep · 70 km away · felt by 3
33. 2.021km WSW of Petrolia, CASat, Sep 25, 7:06 PM PDT · 1835 days ago · 20 km deep · 27 km away
34. 3.613km SE of Petrolia, CASun, Sep 26, 1:51 AM PDT · 1834 days ago · 12 km deep · 29 km away · felt by 12
35. 1.917km W of Humboldt Hill, CASun, Sep 26, 8:38 AM PDT · 1834 days ago · 21 km deep · 26 km away
36. 2.658km W of Petrolia, CASun, Sep 26, 12:54 PM PDT · 1834 days ago · 19 km deep · 57 km away
37. 2.713km SE of Petrolia, CAMon, Sep 27, 3:27 PM PDT · 1833 days ago · 12 km deep · 28 km away
38. 2.318km E of Willow Creek, CATue, Sep 28, 9:05 AM PDT · 1832 days ago · 25 km deep · 93 km away
39. 1.926km ESE of Rio Dell, CAWed, Sep 29, 8:49 AM PDT · 1831 days ago · 20 km deep · 43 km away
40. 2.87km WSW of Petrolia, CAWed, Sep 29, 11:37 PM PDT · 1830 days ago · 30 km deep · 20 km away · felt by 1
41. 2.59km SW of Petrolia, CASat, Oct 2, 1:10 AM PDT · 1828 days ago · 33 km deep · 23 km away
42. 2.320km ENE of Willow Creek, CAMon, Oct 4, 7:35 PM PDT · 1825 days ago · 36 km deep · 97 km away
43. 2.018km ESE of Willow Creek, CAMon, Oct 4, 9:05 PM PDT · 1825 days ago · 23 km deep · 87 km away
44. 3.264km WNW of Petrolia, CATue, Oct 5, 8:54 AM PDT · 1825 days ago · 11 km deep · 60 km away · felt by 1
45. 2.414km SW of Ferndale, CATue, Oct 5, 11:21 AM PDT · 1825 days ago · 23 km deep · 7 km away
46. 2.018km E of Rio Dell, CAWed, Oct 6, 7:40 PM PDT · 1823 days ago · 20 km deep · 36 km away
47. 1.818km E of Rio Dell, CAThu, Oct 7, 8:37 AM PDT · 1823 days ago · 20 km deep · 36 km away
48. 2.856km W of Ferndale, CAThu, Oct 7, 6:08 PM PDT · 1823 days ago · 24 km deep · 52 km away
49. 2.757km W of Ferndale, CAFri, Oct 8, 5:06 AM PDT · 1822 days ago · 9 km deep · 53 km away
50. 1.612km SE of Petrolia, CAFri, Oct 8, 1:05 PM PDT · 1822 days ago · 11 km deep · 28 km away
51. 2.17km SSE of Pine Hills, CAFri, Oct 8, 2:39 PM PDT · 1822 days ago · 25 km deep · 27 km away
52. 2.856km W of Ferndale, CAFri, Oct 8, 8:49 PM PDT · 1821 days ago · 20 km deep · 52 km away
53. 3.818km WSW of Petrolia, CATue, Oct 12, 4:29 AM PDT · 1818 days ago · 21 km deep · 26 km away · felt by 11
54. 1.713km E of Hydesville, CAThu, Oct 14, 5:45 AM PDT · 1816 days ago · 24 km deep · 33 km away
55. 2.08km SSE of Redway, CAFri, Oct 15, 11:18 PM PDT · 1814 days ago · 17 km deep · 66 km away
56. 1.98km SSE of Redway, CAFri, Oct 15, 11:19 PM PDT · 1814 days ago · 17 km deep · 66 km away
57. 1.65km NW of Redway, CASun, Oct 17, 4:25 AM PDT · 1813 days ago · 23 km deep · 54 km away
58. 1.74km NNW of Ferndale, CASun, Oct 17, 7:20 AM PDT · 1813 days ago · 17 km deep · 15 km away
59. 1.719km WNW of Petrolia, CAMon, Oct 18, 9:54 PM PDT · 1811 days ago · 18 km deep · 16 km away
60. 2.656km W of Ferndale, CAWed, Oct 20, 12:27 PM PDT · 1810 days ago · 25 km deep · 53 km away

The first 60 of 63.

Before

1. 1.712km SSW of Ferndale, CAThu, Aug 26, 11:32 AM PDT · 1865 days ago · 18 km deep · 0 km away
2. 2.44km W of Petrolia, CAWed, Aug 25, 1:42 AM PDT · 1866 days ago · 27 km deep · 17 km away
3. 1.87km W of Petrolia, CASun, Aug 22, 9:20 AM PDT · 1869 days ago · 29 km deep · 18 km away
4. 1.620km W of Petrolia, CASat, Aug 21, 8:50 PM PDT · 1869 days ago · 15 km deep · 22 km away
5. 2.955km WNW of Petrolia, CAFri, Aug 20, 11:45 AM PDT · 1871 days ago · 15 km deep · 51 km away
6. 3.16km W of Petrolia, CAFri, Aug 20, 11:01 AM PDT · 1871 days ago · 28 km deep · 18 km away · felt by 1
7. 2.58km W of Petrolia, CAThu, Aug 19, 4:33 PM PDT · 1872 days ago · 28 km deep · 17 km away
8. 2.113km ESE of Redway, CAWed, Aug 18, 6:04 AM PDT · 1873 days ago · 22 km deep · 70 km away
9. 1.816km W of Petrolia, CAMon, Aug 16, 5:20 AM PDT · 1875 days ago · 11 km deep · 23 km away
10. 2.036km WNW of Petrolia, CASun, Aug 15, 1:14 AM PDT · 1876 days ago · 8 km deep · 33 km away
11. 2.28km WSW of Petrolia, CAFri, Aug 13, 3:40 PM PDT · 1878 days ago · 29 km deep · 19 km away
12. 1.910km NW of Petrolia, CAFri, Aug 13, 12:40 PM PDT · 1878 days ago · 23 km deep · 10 km away
13. 2.66km WSW of Petrolia, CAThu, Aug 12, 9:11 PM PDT · 1878 days ago · 30 km deep · 19 km away · felt by 1
14. 2.910km WSW of Petrolia, CAThu, Aug 12, 1:03 AM PDT · 1879 days ago · 31 km deep · 22 km away · felt by 1
15. 1.811km WSW of Petrolia, CAWed, Aug 11, 2:01 PM PDT · 1880 days ago · 29 km deep · 24 km away
16. 2.988km W of Petrolia, CAWed, Aug 11, 8:00 AM PDT · 1880 days ago · 22 km deep · 84 km away
17. 2.98km W of Petrolia, CAMon, Aug 9, 7:03 PM PDT · 1882 days ago · 30 km deep · 17 km away
18. 2.08km W of Petrolia, CAMon, Aug 9, 5:31 AM PDT · 1882 days ago · 28 km deep · 17 km away
19. 3.16km W of Petrolia, CASun, Aug 8, 3:40 AM PDT · 1883 days ago · 28 km deep · 18 km away · felt by 5
20. 1.714km SE of Petrolia, CASun, Aug 8, 1:57 AM PDT · 1883 days ago · 12 km deep · 30 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73615776. Read Sun, Oct 4, 2026, 2:03 PM UTC.