M2.2 earthquake 12km SSW of Ferndale, CA

Magnitude

2.2 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Dec 20, 2021, 1:52 PM PST

UTC

2021-12-20 21:52:03 UTC

Depth

21.1 km (13.1 mi), shallow

Epicenter

40.481° N, 124.320° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.22

Depth from

From location

Station coverage gap

138°

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. 3.318km SW of Ferndale, CAMon, Dec 20, 1:52 PM PST · 1748 days ago · 25 km deep · 9 km away · felt by 2
2. 3.96km NE of Petrolia, CAMon, Dec 20, 1:53 PM PST · 1748 days ago · 27 km deep · 16 km away · felt by 1
3. 1.94km NNE of Petrolia, CAMon, Dec 20, 2:06 PM PST · 1748 days ago · 28 km deep · 15 km away
4. 2.68km W of Petrolia, CAMon, Dec 20, 2:09 PM PST · 1748 days ago · 31 km deep · 17 km away · felt by 2
5. 2.410km NNE of Petrolia, CAMon, Dec 20, 2:10 PM PST · 1748 days ago · 24 km deep · 10 km away
6. 2.37km NNE of Petrolia, CAMon, Dec 20, 2:19 PM PST · 1748 days ago · 23 km deep · 11 km away · felt by 4
7. 2.012km S of Ferndale, CAMon, Dec 20, 2:27 PM PST · 1748 days ago · 24 km deep · 6 km away
8. 2.320km NNE of Redway, CAMon, Dec 20, 2:33 PM PST · 1748 days ago · 26 km deep · 51 km away · felt by 3
9. 2.610km NNW of Petrolia, CAMon, Dec 20, 2:40 PM PST · 1748 days ago · 26 km deep · 8 km away
10. 2.833km W of Petrolia, CAMon, Dec 20, 2:45 PM PST · 1748 days ago · 19 km deep · 35 km away
11. 2.829km W of Petrolia, CAMon, Dec 20, 2:51 PM PST · 1748 days ago · 19 km deep · 31 km away · felt by 3
12. 2.622km SW of Ferndale, CAMon, Dec 20, 2:57 PM PST · 1748 days ago · 27 km deep · 14 km away
13. 2.011km NNE of Petrolia, CAMon, Dec 20, 2:59 PM PST · 1748 days ago · 28 km deep · 10 km away
14. 2.512km SW of Rio Dell, CAMon, Dec 20, 3:02 PM PST · 1748 days ago · 28 km deep · 10 km away
15. 2.47km NNW of Petrolia, CAMon, Dec 20, 3:11 PM PST · 1748 days ago · 26 km deep · 11 km away
16. 2.621km W of Petrolia, CAMon, Dec 20, 3:12 PM PST · 1748 days ago · 21 km deep · 28 km away
17. 1.920km SSE of Rio Dell, CAMon, Dec 20, 3:17 PM PST · 1748 days ago · 31 km deep · 29 km away
18. 2.729km W of Petrolia, CAMon, Dec 20, 3:18 PM PST · 1748 days ago · 21 km deep · 31 km away · felt by 1
19. 2.28km N of Petrolia, CAMon, Dec 20, 3:18 PM PST · 1748 days ago · 26 km deep · 10 km away
20. 2.311km SSW of Ferndale, CAMon, Dec 20, 3:21 PM PST · 1748 days ago · 19 km deep · 1 km away
21. 2.814km N of Petrolia, CAMon, Dec 20, 3:25 PM PST · 1748 days ago · 23 km deep · 4 km away
22. 1.97km N of Petrolia, CAMon, Dec 20, 3:25 PM PST · 1748 days ago · 26 km deep · 11 km away
23. 1.814km N of Petrolia, CAMon, Dec 20, 3:27 PM PST · 1748 days ago · 23 km deep · 4 km away
24. 1.79km SSW of Ferndale, CAMon, Dec 20, 3:40 PM PST · 1748 days ago · 18 km deep · 3 km away
25. 3.08km SSW of Ferndale, CAMon, Dec 20, 3:40 PM PST · 1748 days ago · 18 km deep · 3 km away · felt by 1
26. 2.311km SSW of Ferndale, CAMon, Dec 20, 4:05 PM PST · 1748 days ago · 19 km deep · 1 km away
27. 2.88km NNE of Petrolia, CAMon, Dec 20, 4:10 PM PST · 1748 days ago · 23 km deep · 12 km away
28. 2.627km W of Petrolia, CAMon, Dec 20, 4:12 PM PST · 1748 days ago · 19 km deep · 32 km away
29. 2.66km SE of Ferndale, CAMon, Dec 20, 4:26 PM PST · 1748 days ago · 26 km deep · 11 km away
30. 2.557km WNW of Petrolia, CAMon, Dec 20, 4:51 PM PST · 1748 days ago · 8 km deep · 52 km away
31. 2.28km NNE of Petrolia, CAMon, Dec 20, 4:51 PM PST · 1748 days ago · 25 km deep · 11 km away
32. 1.98km N of Petrolia, CAMon, Dec 20, 4:57 PM PST · 1748 days ago · 24 km deep · 10 km away
33. 2.38km NNE of Petrolia, CAMon, Dec 20, 5:16 PM PST · 1748 days ago · 24 km deep · 11 km away
34. 1.820km SSE of Rio Dell, CAMon, Dec 20, 5:16 PM PST · 1748 days ago · 29 km deep · 29 km away
35. 2.46km N of Petrolia, CAMon, Dec 20, 5:20 PM PST · 1748 days ago · 25 km deep · 12 km away
36. 2.815km WSW of Petrolia, CAMon, Dec 20, 5:44 PM PST · 1748 days ago · 20 km deep · 25 km away
37. 1.69km NNE of Petrolia, CAMon, Dec 20, 6:25 PM PST · 1748 days ago · 23 km deep · 11 km away
38. 2.89km NNE of Petrolia, CAMon, Dec 20, 6:31 PM PST · 1748 days ago · 23 km deep · 11 km away
39. 2.57km N of Petrolia, CAMon, Dec 20, 6:34 PM PST · 1748 days ago · 25 km deep · 11 km away
40. 2.69km N of Petrolia, CAMon, Dec 20, 6:46 PM PST · 1748 days ago · 27 km deep · 10 km away
41. 2.744km WNW of Petrolia, CAMon, Dec 20, 6:48 PM PST · 1748 days ago · 17 km deep · 39 km away
42. 2.713km WSW of Rio Dell, CAMon, Dec 20, 7:18 PM PST · 1748 days ago · 27 km deep · 7 km away
43. 3.810km NNE of Petrolia, CAMon, Dec 20, 7:26 PM PST · 1748 days ago · 27 km deep · 10 km away · felt by 4
44. 2.817km NNW of Petrolia, CAMon, Dec 20, 7:44 PM PST · 1748 days ago · 23 km deep · 6 km away · felt by 2
45. 2.818km NW of Petrolia, CAMon, Dec 20, 8:13 PM PST · 1748 days ago · 24 km deep · 8 km away
46. 3.814km N of Petrolia, CAMon, Dec 20, 8:34 PM PST · 1748 days ago · 28 km deep · 5 km away · felt by 4
47. 2.225km W of Petrolia, CAMon, Dec 20, 9:15 PM PST · 1748 days ago · 19 km deep · 30 km away · felt by 1
48. 2.313km N of Petrolia, CAMon, Dec 20, 9:41 PM PST · 1748 days ago · 25 km deep · 5 km away
49. 2.730km W of Petrolia, CAMon, Dec 20, 9:53 PM PST · 1748 days ago · 21 km deep · 32 km away
50. 2.07km N of Petrolia, CATue, Dec 21, 1:17 AM PST · 1748 days ago · 25 km deep · 11 km away
51. 1.65km E of Petrolia, CATue, Dec 21, 1:27 AM PST · 1748 days ago · 22 km deep · 19 km away
52. 2.27km WSW of Petrolia, CATue, Dec 21, 1:39 AM PST · 1748 days ago · 20 km deep · 21 km away
53. 2.774 km WSW of Ferndale, CaliforniaTue, Dec 21, 2:57 AM PST · 1748 days ago · 10 km deep · 67 km away
54. 2.828km W of Petrolia, CATue, Dec 21, 3:42 AM PST · 1748 days ago · 17 km deep · 33 km away
55. 1.67km S of Ferndale, CATue, Dec 21, 4:13 AM PST · 1748 days ago · 23 km deep · 6 km away
56. 1.812km SSW of Ferndale, CATue, Dec 21, 4:37 AM PST · 1748 days ago · 19 km deep · 1 km away
57. 1.610km SSW of Ferndale, CATue, Dec 21, 4:37 AM PST · 1748 days ago · 23 km deep · 2 km away
58. 1.68km N of Petrolia, CATue, Dec 21, 5:01 AM PST · 1748 days ago · 25 km deep · 10 km away
59. 2.656km WNW of Ferndale, CATue, Dec 21, 5:27 AM PST · 1748 days ago · 18 km deep · 56 km away
60. 2.732km W of Petrolia, CATue, Dec 21, 5:50 AM PST · 1748 days ago · 20 km deep · 34 km away

The first 60 of at least 200.

Before

1. 2.312km SW of Rio Dell, CAMon, Dec 20, 1:51 PM PST · 1748 days ago · 29 km deep · 10 km away
2. 2.411km SSW of Ferndale, CAMon, Dec 20, 1:50 PM PST · 1748 days ago · 21 km deep · 0 km away
3. 2.411km NNE of Petrolia, CAMon, Dec 20, 1:43 PM PST · 1749 days ago · 28 km deep · 10 km away
4. 2.414km NNW of Petrolia, CAMon, Dec 20, 1:42 PM PST · 1749 days ago · 22 km deep · 3 km away
5. 3.211km NNE of Petrolia, CAMon, Dec 20, 1:31 PM PST · 1749 days ago · 23 km deep · 10 km away · felt by 1
6. 2.04km ENE of Petrolia, CAMon, Dec 20, 1:31 PM PST · 1749 days ago · 21 km deep · 17 km away
7. 2.612km SSW of Ferndale, CAMon, Dec 20, 1:29 PM PST · 1749 days ago · 25 km deep · 2 km away
8. 2.715km SW of Ferndale, CAMon, Dec 20, 1:24 PM PST · 1749 days ago · 26 km deep · 5 km away
9. 2.614km N of Petrolia, CAMon, Dec 20, 1:21 PM PST · 1749 days ago · 27 km deep · 4 km away
10. 3.313km SSW of Ferndale, CAMon, Dec 20, 1:19 PM PST · 1749 days ago · 24 km deep · 3 km away · felt by 7
11. 2.412km S of Ferndale, CAMon, Dec 20, 1:19 PM PST · 1749 days ago · 25 km deep · 4 km away
12. 2.38km SSW of Ferndale, CAMon, Dec 20, 1:17 PM PST · 1749 days ago · 19 km deep · 3 km away
13. 2.514km N of Petrolia, CAMon, Dec 20, 1:17 PM PST · 1749 days ago · 29 km deep · 7 km away
14. 2.57km NNE of Petrolia, CAMon, Dec 20, 1:16 PM PST · 1749 days ago · 24 km deep · 12 km away
15. 2.914km SSW of Ferndale, CAMon, Dec 20, 1:16 PM PST · 1749 days ago · 26 km deep · 3 km away
16. 2.813km WSW of Petrolia, CAMon, Dec 20, 1:12 PM PST · 1749 days ago · 22 km deep · 24 km away
17. 3.114km NNE of Petrolia, CAMon, Dec 20, 1:10 PM PST · 1749 days ago · 28 km deep · 7 km away · felt by 3
18. 2.213km N of Petrolia, CAMon, Dec 20, 1:09 PM PST · 1749 days ago · 23 km deep · 5 km away
19. 3.08km SSW of Rio Dell, CAMon, Dec 20, 1:06 PM PST · 1749 days ago · 27 km deep · 17 km away · felt by 1
20. 1.88km ENE of Petrolia, CAMon, Dec 20, 12:58 PM PST · 1749 days ago · 30 km deep · 18 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73666491. Read Sun, Oct 4, 2026, 9:13 AM UTC.