M2.3 earthquake 11km SW of Rio Dell, CA

Magnitude

2.3 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Dec 20, 2021, 12:20 PM PST

UTC

2021-12-20 20:20:33 UTC

Depth

27.7 km (17.2 mi), shallow

Epicenter

40.443° N, 124.214° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.28

Depth from

From location

Station coverage gap

85°

Stations used

14

• Scotia, CaliforniaPopulation 850. Forecast10 kmWSW
• Fortuna, CaliforniaPopulation 12,000. Forecast18 kmSSW
• Chico, CaliforniaPopulation 121,345. Forecast217 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast885 kmNW

After

1. 2.212km N of Petrolia, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 25 km deep · 8 km away
2. 1.87km N of Petrolia, CAMon, Dec 20, 12:21 PM PST · 1749 days ago · 23 km deep · 8 km away
3. 2.510km ESE of Petrolia, CAMon, Dec 20, 12:21 PM PST · 1749 days ago · 28 km deep · 16 km away
4. 2.68km N of Petrolia, CAMon, Dec 20, 12:23 PM PST · 1749 days ago · 26 km deep · 8 km away · felt by 1
5. 2.79km SW of Petrolia, CAMon, Dec 20, 12:23 PM PST · 1749 days ago · 21 km deep · 23 km away
6. 2.69km S of Ferndale, CAMon, Dec 20, 12:24 PM PST · 1749 days ago · 26 km deep · 7 km away
7. 2.711km N of Petrolia, CAMon, Dec 20, 12:25 PM PST · 1749 days ago · 25 km deep · 8 km away
8. 2.312km SW of Rio Dell, CAMon, Dec 20, 12:26 PM PST · 1749 days ago · 27 km deep · 2 km away
9. 1.86km NNW of Petrolia, CAMon, Dec 20, 12:27 PM PST · 1749 days ago · 26 km deep · 10 km away
10. 2.99km N of Petrolia, CAMon, Dec 20, 12:28 PM PST · 1749 days ago · 25 km deep · 7 km away · felt by 5
11. 2.812km NNW of Petrolia, CAMon, Dec 20, 12:29 PM PST · 1749 days ago · 26 km deep · 9 km away · felt by 1
12. 1.915km NNW of Petrolia, CAMon, Dec 20, 12:30 PM PST · 1749 days ago · 26 km deep · 11 km away
13. 2.810km SSE of Ferndale, CAMon, Dec 20, 12:30 PM PST · 1749 days ago · 25 km deep · 5 km away
14. 2.65km NNW of Petrolia, CAMon, Dec 20, 12:34 PM PST · 1749 days ago · 28 km deep · 11 km away
15. 2.611km WSW of Rio Dell, CAMon, Dec 20, 12:36 PM PST · 1749 days ago · 25 km deep · 3 km away
16. 2.518km W of Petrolia, CAMon, Dec 20, 12:37 PM PST · 1749 days ago · 20 km deep · 29 km away
17. 1.86km NE of Petrolia, CAMon, Dec 20, 12:39 PM PST · 1749 days ago · 23 km deep · 9 km away
18. 2.39km NNE of Petrolia, CAMon, Dec 20, 12:40 PM PST · 1749 days ago · 24 km deep · 6 km away
19. 2.19km NNE of Petrolia, CAMon, Dec 20, 12:42 PM PST · 1749 days ago · 25 km deep · 6 km away
20. 2.16km ENE of Petrolia, CAMon, Dec 20, 12:46 PM PST · 1749 days ago · 28 km deep · 10 km away
21. 2.67km N of Petrolia, CAMon, Dec 20, 12:46 PM PST · 1749 days ago · 26 km deep · 9 km away
22. 3.327km W of Petrolia, CAMon, Dec 20, 12:47 PM PST · 1749 days ago · 18 km deep · 35 km away · felt by 13
23. 2.94km NE of Petrolia, CAMon, Dec 20, 12:53 PM PST · 1749 days ago · 22 km deep · 11 km away
24. 3.111km N of Petrolia, CAMon, Dec 20, 12:55 PM PST · 1749 days ago · 25 km deep · 7 km away · felt by 2
25. 3.07km NW of Petrolia, CAMon, Dec 20, 12:56 PM PST · 1749 days ago · 28 km deep · 13 km away
26. 2.59km N of Petrolia, CAMon, Dec 20, 12:57 PM PST · 1749 days ago · 29 km deep · 6 km away
27. 1.88km ENE of Petrolia, CAMon, Dec 20, 12:58 PM PST · 1749 days ago · 30 km deep · 10 km away
28. 3.08km SSW of Rio Dell, CAMon, Dec 20, 1:06 PM PST · 1749 days ago · 27 km deep · 7 km away · felt by 1
29. 2.213km N of Petrolia, CAMon, Dec 20, 1:09 PM PST · 1749 days ago · 23 km deep · 7 km away
30. 3.114km NNE of Petrolia, CAMon, Dec 20, 1:10 PM PST · 1749 days ago · 28 km deep · 3 km away · felt by 3
31. 2.813km WSW of Petrolia, CAMon, Dec 20, 1:12 PM PST · 1749 days ago · 22 km deep · 25 km away
32. 2.914km SSW of Ferndale, CAMon, Dec 20, 1:16 PM PST · 1749 days ago · 26 km deep · 11 km away
33. 2.57km NNE of Petrolia, CAMon, Dec 20, 1:16 PM PST · 1749 days ago · 24 km deep · 8 km away
34. 2.514km N of Petrolia, CAMon, Dec 20, 1:17 PM PST · 1749 days ago · 29 km deep · 4 km away
35. 2.38km SSW of Ferndale, CAMon, Dec 20, 1:17 PM PST · 1749 days ago · 19 km deep · 10 km away
36. 2.412km S of Ferndale, CAMon, Dec 20, 1:19 PM PST · 1749 days ago · 25 km deep · 6 km away
37. 3.313km SSW of Ferndale, CAMon, Dec 20, 1:19 PM PST · 1749 days ago · 24 km deep · 8 km away · felt by 7
38. 2.614km N of Petrolia, CAMon, Dec 20, 1:21 PM PST · 1749 days ago · 27 km deep · 9 km away
39. 2.715km SW of Ferndale, CAMon, Dec 20, 1:24 PM PST · 1749 days ago · 26 km deep · 14 km away
40. 2.612km SSW of Ferndale, CAMon, Dec 20, 1:29 PM PST · 1749 days ago · 25 km deep · 8 km away
41. 2.04km ENE of Petrolia, CAMon, Dec 20, 1:31 PM PST · 1749 days ago · 21 km deep · 12 km away
42. 3.211km NNE of Petrolia, CAMon, Dec 20, 1:31 PM PST · 1749 days ago · 23 km deep · 4 km away · felt by 1
43. 2.414km NNW of Petrolia, CAMon, Dec 20, 1:42 PM PST · 1749 days ago · 22 km deep · 9 km away
44. 2.411km NNE of Petrolia, CAMon, Dec 20, 1:43 PM PST · 1749 days ago · 28 km deep · 3 km away
45. 2.411km SSW of Ferndale, CAMon, Dec 20, 1:50 PM PST · 1749 days ago · 21 km deep · 10 km away
46. 2.312km SW of Rio Dell, CAMon, Dec 20, 1:51 PM PST · 1749 days ago · 29 km deep · 1 km away
47. 2.212km SSW of Ferndale, CAMon, Dec 20, 1:52 PM PST · 1749 days ago · 21 km deep · 10 km away
48. 3.318km SW of Ferndale, CAMon, Dec 20, 1:52 PM PST · 1749 days ago · 25 km deep · 18 km away · felt by 2
49. 3.96km NE of Petrolia, CAMon, Dec 20, 1:53 PM PST · 1749 days ago · 27 km deep · 9 km away · felt by 1
50. 1.94km NNE of Petrolia, CAMon, Dec 20, 2:06 PM PST · 1749 days ago · 28 km deep · 10 km away
51. 2.68km W of Petrolia, CAMon, Dec 20, 2:09 PM PST · 1749 days ago · 31 km deep · 18 km away · felt by 2
52. 2.410km NNE of Petrolia, CAMon, Dec 20, 2:10 PM PST · 1749 days ago · 24 km deep · 5 km away
53. 2.37km NNE of Petrolia, CAMon, Dec 20, 2:19 PM PST · 1749 days ago · 23 km deep · 7 km away · felt by 4
54. 2.012km S of Ferndale, CAMon, Dec 20, 2:27 PM PST · 1749 days ago · 24 km deep · 4 km away
55. 2.320km NNE of Redway, CAMon, Dec 20, 2:33 PM PST · 1749 days ago · 26 km deep · 41 km away · felt by 3
56. 2.610km NNW of Petrolia, CAMon, Dec 20, 2:40 PM PST · 1749 days ago · 26 km deep · 9 km away
57. 2.833km W of Petrolia, CAMon, Dec 20, 2:45 PM PST · 1749 days ago · 19 km deep · 41 km away
58. 2.829km W of Petrolia, CAMon, Dec 20, 2:51 PM PST · 1749 days ago · 19 km deep · 38 km away · felt by 3
59. 2.622km SW of Ferndale, CAMon, Dec 20, 2:57 PM PST · 1749 days ago · 27 km deep · 23 km away
60. 2.011km NNE of Petrolia, CAMon, Dec 20, 2:59 PM PST · 1749 days ago · 28 km deep · 4 km away

The first 60 of at least 199.

Before

1. 2.86km N of Petrolia, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 26 km deep · 10 km away
2. 2.76km NW of Petrolia, CAMon, Dec 20, 12:20 PM PST · 1749 days ago · 28 km deep · 13 km away
3. 2.315km NW of Petrolia, CAMon, Dec 20, 12:19 PM PST · 1749 days ago · 29 km deep · 15 km away
4. 2.27km N of Petrolia, CAMon, Dec 20, 12:19 PM PST · 1749 days ago · 24 km deep · 8 km away
5. 2.18km N of Petrolia, CAMon, Dec 20, 12:18 PM PST · 1749 days ago · 25 km deep · 7 km away
6. 2.811km N of Petrolia, CAMon, Dec 20, 12:18 PM PST · 1749 days ago · 25 km deep · 7 km away
7. 2.19km NNE of Petrolia, CAMon, Dec 20, 12:17 PM PST · 1749 days ago · 24 km deep · 5 km away
8. 2.47km N of Petrolia, CAMon, Dec 20, 12:17 PM PST · 1749 days ago · 28 km deep · 8 km away
9. 4.852km W of Petrolia, CAMon, Dec 20, 12:13 PM PST · 1749 days ago · 20 km deep · 59 km away · felt by 8
10. 6.27km N of Petrolia, CAMon, Dec 20, 12:10 PM PST · 1749 days ago · 27 km deep · 9 km away · felt by 4,378 · PAGER yellow · tsunami flag
11. 5.729km W of Petrolia, CAMon, Dec 20, 12:10 PM PST · 1749 days ago · 17 km deep · 38 km away
12. 4.022km W of Petrolia, CAMon, Dec 20, 6:25 AM PST · 1749 days ago · 20 km deep · 32 km away · felt by 36
13. 2.717km SW of Ferndale, CASat, Dec 18, 1:02 AM PST · 1751 days ago · 26 km deep · 17 km away
14. 2.319km NW of Petrolia, CAFri, Dec 17, 10:06 AM PST · 1752 days ago · 18 km deep · 20 km away
15. 1.69km ENE of Petrolia, CAWed, Dec 15, 6:34 PM PST · 1754 days ago · 22 km deep · 10 km away
16. 2.419km WSW of Petrolia, CAWed, Dec 15, 6:48 AM PST · 1754 days ago · 21 km deep · 30 km away
17. 2.310km SE of Willow Creek, CASat, Dec 11, 8:56 PM PST · 1758 days ago · 18 km deep · 76 km away
18. 2.010km SSW of Ferndale, CAFri, Dec 10, 11:52 PM PST · 1759 days ago · 18 km deep · 10 km away
19. 2.627km WNW of Petrolia, CAFri, Dec 10, 4:25 AM PST · 1759 days ago · 20 km deep · 31 km away
20. 1.811km SSE of Blue Lake, CAWed, Dec 8, 10:38 PM PST · 1761 days ago · 21 km deep · 46 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc71126909. Read Sun, Oct 4, 2026, 8:23 PM UTC.