M1.9 earthquake 13km ENE of Hydesville, CA

Magnitude

1.9 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Wed, Oct 27, 2021, 8:17 PM PDT

UTC

2021-10-28 03:17:32 UTC

Depth

20.9 km (13.0 mi), shallow

Epicenter

40.602° N, 123.959° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

76°

Stations used

25

• Hydesville, CaliforniaPopulation 1,237. Forecast13 kmENE
• Fortuna, CaliforniaPopulation 12,000. Forecast17 kmE
• Chico, CaliforniaPopulation 121,345. Forecast205 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast886 kmNNW

After

1. 2.519km W of Petrolia, CASat, Oct 30, 4:24 PM PDT · 1800 days ago · 19 km deep · 54 km away
2. 2.58km E of Willow Creek, CATue, Nov 2, 8:03 AM PDT · 1797 days ago · 26 km deep · 52 km away
3. 4.45km NNE of Petrolia, CATue, Nov 2, 5:24 PM PDT · 1797 days ago · 30 km deep · 37 km away · felt by 114 · tsunami flag
4. 2.34km NNE of Petrolia, CATue, Nov 2, 5:27 PM PDT · 1797 days ago · 30 km deep · 38 km away
5. 2.66km NNE of Petrolia, CATue, Nov 2, 5:39 PM PDT · 1797 days ago · 28 km deep · 36 km away · felt by 2
6. 2.56km N of Petrolia, CATue, Nov 2, 5:41 PM PDT · 1797 days ago · 29 km deep · 37 km away
7. 3.06km NNE of Petrolia, CATue, Nov 2, 6:33 PM PDT · 1797 days ago · 30 km deep · 36 km away · felt by 10
8. 2.53km N of Petrolia, CATue, Nov 2, 9:55 PM PDT · 1796 days ago · 28 km deep · 39 km away
9. 2.028km NE of Redway, CATue, Nov 2, 9:59 PM PDT · 1796 days ago · 27 km deep · 45 km away
10. 1.75km NNE of Petrolia, CATue, Nov 2, 10:10 PM PDT · 1796 days ago · 28 km deep · 37 km away
11. 2.45km NNW of Petrolia, CATue, Nov 2, 10:58 PM PDT · 1796 days ago · 29 km deep · 39 km away
12. 4.119km NW of Covelo, CAWed, Nov 3, 5:24 PM PDT · 1796 days ago · 7 km deep · 91 km away · felt by 21
13. 2.48km SSE of Petrolia, CAFri, Nov 5, 10:52 AM PDT · 1794 days ago · 21 km deep · 46 km away
14. 1.86km NNE of Petrolia, CASat, Nov 6, 8:33 AM PDT · 1793 days ago · 28 km deep · 35 km away
15. 1.917km WNW of Cape Vizcaino, CASat, Nov 6, 5:47 PM PDT · 1793 days ago · 1 km deep · 91 km away
16. 2.86km NNE of Petrolia, CATue, Nov 9, 11:48 AM PST · 1790 days ago · 27 km deep · 35 km away
17. 2.96km NNE of Petrolia, CAThu, Nov 11, 5:35 AM PST · 1788 days ago · 29 km deep · 35 km away
18. 2.516km SSE of Somes Bar, CAFri, Nov 12, 3:45 AM PST · 1787 days ago · 38 km deep · 88 km away
19. 2.037km W of Petrolia, CAFri, Nov 12, 7:05 AM PST · 1787 days ago · 19 km deep · 72 km away
20. 2.212km WNW of Petrolia, CASat, Nov 13, 1:12 PM PST · 1786 days ago · 17 km deep · 47 km away
21. 1.72km N of Redway, CAFri, Nov 19, 7:08 PM PST · 1779 days ago · 22 km deep · 52 km away
22. 3.020km W of Petrolia, CAMon, Nov 22, 1:22 PM PST · 1777 days ago · 19 km deep · 58 km away · felt by 4
23. 2.415km WSW of Petrolia, CATue, Nov 23, 12:24 AM PST · 1776 days ago · 17 km deep · 54 km away · felt by 1
24. 2.747km W of Petrolia, CATue, Nov 23, 11:11 PM PST · 1775 days ago · 12 km deep · 79 km away
25. 2.421km SSE of Willow Creek, CAWed, Nov 24, 1:26 AM PST · 1775 days ago · 21 km deep · 41 km away
26. 2.647km W of Petrolia, CAWed, Nov 24, 3:14 PM PST · 1775 days ago · 11 km deep · 78 km away
27. 2.29km ESE of Willow Creek, CAWed, Nov 24, 10:18 PM PST · 1774 days ago · 22 km deep · 48 km away
28. 2.313km SE of Petrolia, CAThu, Nov 25, 1:18 AM PST · 1774 days ago · 12 km deep · 43 km away
29. 2.615km SE of Petrolia, CAThu, Nov 25, 2:10 AM PST · 1774 days ago · 11 km deep · 43 km away · felt by 1
30. 2.59km NNE of Hayfork, CASun, Nov 28, 12:56 AM PST · 1771 days ago · 31 km deep · 70 km away
31. 2.718km W of Petrolia, CASun, Nov 28, 8:36 PM PST · 1770 days ago · 21 km deep · 53 km away
32. 1.84km N of Hydesville, CAMon, Nov 29, 4:51 PM PST · 1770 days ago · 19 km deep · 12 km away
33. 2.419km W of Petrolia, CATue, Dec 7, 8:22 AM PST · 1762 days ago · 10 km deep · 57 km away
34. 2.826km W of Petrolia, CATue, Dec 7, 1:06 PM PST · 1762 days ago · 12 km deep · 64 km away
35. 2.713km SE of Petrolia, CAWed, Dec 8, 8:28 PM PST · 1760 days ago · 13 km deep · 43 km away · felt by 1
36. 2.740km W of Petrolia, CAWed, Dec 8, 10:00 PM PST · 1760 days ago · 16 km deep · 71 km away
37. 1.811km SSE of Blue Lake, CAWed, Dec 8, 10:38 PM PST · 1760 days ago · 21 km deep · 22 km away
38. 2.627km WNW of Petrolia, CAFri, Dec 10, 4:25 AM PST · 1759 days ago · 20 km deep · 56 km away
39. 2.010km SSW of Ferndale, CAFri, Dec 10, 11:52 PM PST · 1758 days ago · 18 km deep · 32 km away
40. 2.310km SE of Willow Creek, CASat, Dec 11, 8:56 PM PST · 1757 days ago · 18 km deep · 48 km away
41. 2.419km WSW of Petrolia, CAWed, Dec 15, 6:48 AM PST · 1754 days ago · 21 km deep · 58 km away
42. 1.69km ENE of Petrolia, CAWed, Dec 15, 6:34 PM PST · 1754 days ago · 22 km deep · 34 km away
43. 2.319km NW of Petrolia, CAFri, Dec 17, 10:06 AM PST · 1752 days ago · 18 km deep · 45 km away
44. 2.717km SW of Ferndale, CASat, Dec 18, 1:02 AM PST · 1751 days ago · 26 km deep · 41 km away
45. 4.022km W of Petrolia, CAMon, Dec 20, 6:25 AM PST · 1749 days ago · 20 km deep · 60 km away · felt by 36
46. 5.729km W of Petrolia, CAMon, Dec 20, 12:10 PM PST · 1749 days ago · 17 km deep · 66 km away
47. 6.27km N of Petrolia, CAMon, Dec 20, 12:10 PM PST · 1749 days ago · 27 km deep · 37 km away · felt by 4,378 · PAGER yellow · tsunami flag
48. 4.852km W of Petrolia, CAMon, Dec 20, 12:13 PM PST · 1749 days ago · 20 km deep · 84 km away · felt by 8
49. 2.47km N of Petrolia, CAMon, Dec 20, 12:17 PM PST · 1749 days ago · 28 km deep · 36 km away
50. 2.19km NNE of Petrolia, CAMon, Dec 20, 12:17 PM PST · 1749 days ago · 24 km deep · 33 km away
51. 2.811km N of Petrolia, CAMon, Dec 20, 12:18 PM PST · 1749 days ago · 25 km deep · 34 km away
52. 2.18km N of Petrolia, CAMon, Dec 20, 12:18 PM PST · 1749 days ago · 25 km deep · 35 km away
53. 2.27km N of Petrolia, CAMon, Dec 20, 12:19 PM PST · 1749 days ago · 24 km deep · 36 km away
54. 2.315km NW of Petrolia, CAMon, Dec 20, 12:19 PM PST · 1749 days ago · 29 km deep · 41 km away
55. 2.76km NW of Petrolia, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 28 km deep · 41 km away
56. 2.86km N of Petrolia, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 26 km deep · 37 km away
57. 2.311km SW of Rio Dell, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 28 km deep · 28 km away
58. 2.212km N of Petrolia, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 25 km deep · 35 km away
59. 1.87km N of Petrolia, CAMon, Dec 20, 12:21 PM PST · 1749 days ago · 23 km deep · 36 km away
60. 2.510km ESE of Petrolia, CAMon, Dec 20, 12:21 PM PST · 1749 days ago · 28 km deep · 38 km away

The first 60 of at least 199.

Before

1. 2.426km WNW of Petrolia, CAFri, Oct 22, 9:40 PM PDT · 1807 days ago · 29 km deep · 57 km away
2. 2.923km W of Petrolia, CAThu, Oct 21, 6:10 AM PDT · 1809 days ago · 20 km deep · 61 km away · felt by 1
3. 2.212km WSW of Petrolia, CAWed, Oct 20, 7:43 PM PDT · 1810 days ago · 9 km deep · 52 km away
4. 2.656km W of Ferndale, CAWed, Oct 20, 12:27 PM PDT · 1810 days ago · 25 km deep · 82 km away
5. 1.719km WNW of Petrolia, CAMon, Oct 18, 9:54 PM PDT · 1811 days ago · 18 km deep · 49 km away
6. 1.74km NNW of Ferndale, CASun, Oct 17, 7:20 AM PDT · 1813 days ago · 17 km deep · 27 km away
7. 1.65km NW of Redway, CASun, Oct 17, 4:25 AM PDT · 1813 days ago · 23 km deep · 51 km away
8. 1.98km SSE of Redway, CAFri, Oct 15, 11:19 PM PDT · 1814 days ago · 17 km deep · 63 km away
9. 2.08km SSE of Redway, CAFri, Oct 15, 11:18 PM PDT · 1814 days ago · 17 km deep · 63 km away
10. 1.713km E of Hydesville, CAThu, Oct 14, 5:45 AM PDT · 1816 days ago · 24 km deep · 4 km away
11. 3.818km WSW of Petrolia, CATue, Oct 12, 4:29 AM PDT · 1818 days ago · 21 km deep · 57 km away · felt by 11
12. 2.856km W of Ferndale, CAFri, Oct 8, 8:49 PM PDT · 1821 days ago · 20 km deep · 82 km away
13. 2.17km SSE of Pine Hills, CAFri, Oct 8, 2:39 PM PDT · 1822 days ago · 25 km deep · 16 km away
14. 1.612km SE of Petrolia, CAFri, Oct 8, 1:05 PM PDT · 1822 days ago · 11 km deep · 44 km away
15. 2.757km W of Ferndale, CAFri, Oct 8, 5:06 AM PDT · 1822 days ago · 9 km deep · 83 km away
16. 2.856km W of Ferndale, CAThu, Oct 7, 6:08 PM PDT · 1823 days ago · 24 km deep · 81 km away
17. 1.818km E of Rio Dell, CAThu, Oct 7, 8:37 AM PDT · 1823 days ago · 20 km deep · 15 km away
18. 2.018km E of Rio Dell, CAWed, Oct 6, 7:40 PM PDT · 1824 days ago · 20 km deep · 14 km away
19. 2.414km SW of Ferndale, CATue, Oct 5, 11:21 AM PDT · 1825 days ago · 23 km deep · 39 km away
20. 3.264km WNW of Petrolia, CATue, Oct 5, 8:54 AM PDT · 1825 days ago · 11 km deep · 92 km away · felt by 1

From the USGS Earthquake Hazards Program and its partner networks, event nc73645745. Read Sun, Oct 4, 2026, 2:31 PM UTC.