M1.6 earthquake 5km E of Petrolia, CA

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Dec 21, 2021, 1:27 AM PST

UTC

2021-12-21 09:27:16 UTC

Depth

22.4 km (13.9 mi), shallow

Epicenter

40.320° N, 124.231° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

123°

Stations used

13

• Scotia, CaliforniaPopulation 850. Forecast21 kmSSW
• Fortuna, CaliforniaPopulation 12,000. Forecast32 kmSSW
• Chico, CaliforniaPopulation 121,345. Forecast214 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast875 kmNW

After

1. 2.27km WSW of Petrolia, CATue, Dec 21, 1:39 AM PST · 1748 days ago · 20 km deep · 11 km away
2. 2.774 km WSW of Ferndale, CaliforniaTue, Dec 21, 2:57 AM PST · 1748 days ago · 10 km deep · 71 km away
3. 2.828km W of Petrolia, CATue, Dec 21, 3:42 AM PST · 1748 days ago · 17 km deep · 33 km away
4. 1.67km S of Ferndale, CATue, Dec 21, 4:13 AM PST · 1748 days ago · 23 km deep · 22 km away
5. 1.812km SSW of Ferndale, CATue, Dec 21, 4:37 AM PST · 1748 days ago · 19 km deep · 19 km away
6. 1.610km SSW of Ferndale, CATue, Dec 21, 4:37 AM PST · 1748 days ago · 23 km deep · 19 km away
7. 1.68km N of Petrolia, CATue, Dec 21, 5:01 AM PST · 1748 days ago · 25 km deep · 10 km away
8. 2.656km WNW of Ferndale, CATue, Dec 21, 5:27 AM PST · 1748 days ago · 18 km deep · 72 km away
9. 2.732km W of Petrolia, CATue, Dec 21, 5:50 AM PST · 1748 days ago · 20 km deep · 37 km away
10. 2.97km N of Petrolia, CATue, Dec 21, 6:09 AM PST · 1748 days ago · 25 km deep · 9 km away
11. 2.317km WSW of Petrolia, CATue, Dec 21, 6:13 AM PST · 1748 days ago · 20 km deep · 21 km away
12. 3.212km SSW of Ferndale, CATue, Dec 21, 6:16 AM PST · 1748 days ago · 28 km deep · 18 km away · felt by 11
13. 2.414km S of Ferndale, CATue, Dec 21, 6:54 AM PST · 1748 days ago · 26 km deep · 16 km away
14. 1.84km ENE of Petrolia, CATue, Dec 21, 7:49 AM PST · 1748 days ago · 23 km deep · 2 km away
15. 2.811km N of Petrolia, CATue, Dec 21, 8:50 AM PST · 1748 days ago · 24 km deep · 13 km away · felt by 5
16. 3.230km W of Petrolia, CATue, Dec 21, 9:24 AM PST · 1748 days ago · 21 km deep · 35 km away · felt by 2
17. 2.838km WNW of Petrolia, CATue, Dec 21, 1:35 PM PST · 1748 days ago · 22 km deep · 42 km away
18. 2.825km W of Petrolia, CATue, Dec 21, 3:08 PM PST · 1748 days ago · 20 km deep · 29 km away · felt by 2
19. 1.85km NNE of Petrolia, CATue, Dec 21, 10:31 PM PST · 1747 days ago · 24 km deep · 5 km away
20. 1.810km N of Petrolia, CATue, Dec 21, 10:51 PM PST · 1747 days ago · 27 km deep · 12 km away
21. 1.611km SW of Rio Dell, CAWed, Dec 22, 12:41 AM PST · 1747 days ago · 25 km deep · 13 km away
22. 1.713km NNE of Petrolia, CAWed, Dec 22, 3:37 AM PST · 1747 days ago · 26 km deep · 13 km away
23. 2.57km NNE of Petrolia, CAWed, Dec 22, 10:39 AM PST · 1747 days ago · 25 km deep · 8 km away
24. 2.611km WSW of Petrolia, CAWed, Dec 22, 1:36 PM PST · 1747 days ago · 28 km deep · 15 km away
25. 2.714km S of Ferndale, CAWed, Dec 22, 5:13 PM PST · 1747 days ago · 26 km deep · 15 km away · felt by 1
26. 2.910km WSW of Petrolia, CAWed, Dec 22, 5:47 PM PST · 1747 days ago · 31 km deep · 14 km away · felt by 1
27. 3.96km N of Petrolia, CAWed, Dec 22, 7:28 PM PST · 1746 days ago · 21 km deep · 8 km away · felt by 77
28. 2.213km WSW of Petrolia, CAThu, Dec 23, 12:27 AM PST · 1746 days ago · 35 km deep · 17 km away
29. 3.26km W of Petrolia, CAThu, Dec 23, 3:24 AM PST · 1746 days ago · 31 km deep · 11 km away · felt by 3
30. 2.540km W of Petrolia, CAThu, Dec 23, 8:25 AM PST · 1746 days ago · 11 km deep · 45 km away
31. 2.915km NW of Petrolia, CAThu, Dec 23, 10:32 AM PST · 1746 days ago · 27 km deep · 18 km away
32. 2.97km WSW of Petrolia, CAThu, Dec 23, 10:55 AM PST · 1746 days ago · 30 km deep · 11 km away · felt by 2
33. 2.411km WSW of Petrolia, CAThu, Dec 23, 10:57 AM PST · 1746 days ago · 29 km deep · 15 km away
34. 2.19km NNE of Petrolia, CAThu, Dec 23, 11:29 AM PST · 1746 days ago · 25 km deep · 9 km away
35. 2.66km NNW of Petrolia, CAThu, Dec 23, 4:14 PM PST · 1746 days ago · 29 km deep · 10 km away
36. 2.55km N of Petrolia, CAThu, Dec 23, 4:20 PM PST · 1746 days ago · 26 km deep · 7 km away
37. 2.649km W of Petrolia, CAThu, Dec 23, 5:34 PM PST · 1746 days ago · 2 km deep · 54 km away
38. 2.411km SW of Petrolia, CAThu, Dec 23, 6:53 PM PST · 1746 days ago · 20 km deep · 15 km away
39. 2.734km W of Petrolia, CAThu, Dec 23, 8:29 PM PST · 1745 days ago · 23 km deep · 38 km away · felt by 1
40. 2.736km W of Petrolia, CAThu, Dec 23, 8:39 PM PST · 1745 days ago · 22 km deep · 41 km away
41. 3.19km WSW of Petrolia, CAFri, Dec 24, 4:58 AM PST · 1745 days ago · 31 km deep · 13 km away · felt by 1
42. 3.635km W of Petrolia, CAFri, Dec 24, 6:24 AM PST · 1745 days ago · 23 km deep · 40 km away · felt by 1
43. 3.344km W of Petrolia, CAFri, Dec 24, 7:51 AM PST · 1745 days ago · 10 km deep · 49 km away · felt by 1
44. 2.912km N of Petrolia, CAFri, Dec 24, 10:30 AM PST · 1745 days ago · 26 km deep · 13 km away
45. 1.74km ENE of Petrolia, CAFri, Dec 24, 3:37 PM PST · 1745 days ago · 26 km deep · 2 km away
46. 2.940km W of Petrolia, CAFri, Dec 24, 6:49 PM PST · 1745 days ago · 20 km deep · 45 km away · felt by 1
47. 2.936km W of Petrolia, CASat, Dec 25, 7:57 AM PST · 1744 days ago · 20 km deep · 41 km away
48. 1.67km N of Petrolia, CASat, Dec 25, 12:24 PM PST · 1744 days ago · 23 km deep · 8 km away
49. 2.832km W of Petrolia, CASun, Dec 26, 6:16 AM PST · 1743 days ago · 19 km deep · 36 km away · felt by 1
50. 2.08km NNE of Petrolia, CASun, Dec 26, 4:40 PM PST · 1743 days ago · 26 km deep · 9 km away
51. 2.429km W of Petrolia, CASun, Dec 26, 8:53 PM PST · 1742 days ago · 20 km deep · 34 km away
52. 2.326km W of Petrolia, CAMon, Dec 27, 12:18 AM PST · 1742 days ago · 16 km deep · 31 km away
53. 1.713km N of Petrolia, CATue, Dec 28, 5:52 AM PST · 1741 days ago · 25 km deep · 14 km away
54. 2.531km W of Petrolia, CATue, Dec 28, 8:18 AM PST · 1741 days ago · 15 km deep · 35 km away
55. 1.713km WSW of Rio Dell, CATue, Dec 28, 3:13 PM PST · 1741 days ago · 27 km deep · 15 km away
56. 2.731km W of Petrolia, CATue, Dec 28, 3:16 PM PST · 1741 days ago · 20 km deep · 36 km away
57. 2.813km S of Ferndale, CATue, Dec 28, 3:17 PM PST · 1741 days ago · 27 km deep · 15 km away
58. 2.726km W of Petrolia, CAWed, Dec 29, 2:17 AM PST · 1740 days ago · 22 km deep · 31 km away
59. 2.72km NE of Petrolia, CAWed, Dec 29, 2:59 AM PST · 1740 days ago · 28 km deep · 4 km away
60. 3.693km W of Petrolia, CAWed, Dec 29, 7:23 AM PST · 1740 days ago · 23 km deep · 98 km away

The first 60 of 158.

Before

1. 2.07km N of Petrolia, CATue, Dec 21, 1:17 AM PST · 1748 days ago · 25 km deep · 9 km away
2. 2.730km W of Petrolia, CAMon, Dec 20, 9:53 PM PST · 1748 days ago · 21 km deep · 34 km away
3. 2.313km N of Petrolia, CAMon, Dec 20, 9:41 PM PST · 1748 days ago · 25 km deep · 15 km away
4. 2.225km W of Petrolia, CAMon, Dec 20, 9:15 PM PST · 1748 days ago · 19 km deep · 30 km away · felt by 1
5. 3.814km N of Petrolia, CAMon, Dec 20, 8:34 PM PST · 1748 days ago · 28 km deep · 15 km away · felt by 4
6. 2.818km NW of Petrolia, CAMon, Dec 20, 8:13 PM PST · 1748 days ago · 24 km deep · 21 km away
7. 2.817km NNW of Petrolia, CAMon, Dec 20, 7:44 PM PST · 1748 days ago · 23 km deep · 20 km away · felt by 2
8. 3.810km NNE of Petrolia, CAMon, Dec 20, 7:26 PM PST · 1748 days ago · 27 km deep · 10 km away · felt by 4
9. 2.713km WSW of Rio Dell, CAMon, Dec 20, 7:18 PM PST · 1749 days ago · 27 km deep · 14 km away
10. 2.744km WNW of Petrolia, CAMon, Dec 20, 6:48 PM PST · 1749 days ago · 17 km deep · 48 km away
11. 2.69km N of Petrolia, CAMon, Dec 20, 6:46 PM PST · 1749 days ago · 27 km deep · 10 km away
12. 2.57km N of Petrolia, CAMon, Dec 20, 6:34 PM PST · 1749 days ago · 25 km deep · 9 km away
13. 2.89km NNE of Petrolia, CAMon, Dec 20, 6:31 PM PST · 1749 days ago · 23 km deep · 9 km away
14. 1.69km NNE of Petrolia, CAMon, Dec 20, 6:25 PM PST · 1749 days ago · 23 km deep · 9 km away
15. 2.815km WSW of Petrolia, CAMon, Dec 20, 5:44 PM PST · 1749 days ago · 20 km deep · 20 km away
16. 2.46km N of Petrolia, CAMon, Dec 20, 5:20 PM PST · 1749 days ago · 25 km deep · 8 km away
17. 1.820km SSE of Rio Dell, CAMon, Dec 20, 5:16 PM PST · 1749 days ago · 29 km deep · 15 km away
18. 2.38km NNE of Petrolia, CAMon, Dec 20, 5:16 PM PST · 1749 days ago · 24 km deep · 9 km away
19. 1.98km N of Petrolia, CAMon, Dec 20, 4:57 PM PST · 1749 days ago · 24 km deep · 10 km away
20. 2.28km NNE of Petrolia, CAMon, Dec 20, 4:51 PM PST · 1749 days ago · 25 km deep · 9 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73666981. Read Sun, Oct 4, 2026, 2:48 PM UTC.