M2.7 earthquake 74 km WSW of Ferndale, California

Magnitude

2.7 (ML, local (Richter)), micro

Magnitude from

USGS National Earthquake Information Center

Local time

Tue, Dec 21, 2021, 2:57 AM PST

UTC

2021-12-21 10:57:32 UTC

Depth

10.0 km (6.2 mi), shallow

Epicenter

40.310° N, 125.074° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 3.4 km horizontally, 2.0 km in depth

Magnitude uncertainty

±0.06

Depth from

Operator assigned

Station coverage gap

254°, poorly surrounded by stations

Stations used

21

• Ferndale, CaliforniaPopulation 1,369. Forecast75 kmWSW
• Fortuna, CaliforniaPopulation 12,000. Forecast84 kmWSW
• Chico, CaliforniaPopulation 121,345. Forecast283 kmWNW

After

1. 2.828km W of Petrolia, CATue, Dec 21, 3:42 AM PST · 1748 days ago · 17 km deep · 39 km away
2. 1.67km S of Ferndale, CATue, Dec 21, 4:13 AM PST · 1748 days ago · 23 km deep · 72 km away
3. 1.812km SSW of Ferndale, CATue, Dec 21, 4:37 AM PST · 1748 days ago · 19 km deep · 67 km away
4. 1.610km SSW of Ferndale, CATue, Dec 21, 4:37 AM PST · 1748 days ago · 23 km deep · 69 km away
5. 1.68km N of Petrolia, CATue, Dec 21, 5:01 AM PST · 1748 days ago · 25 km deep · 67 km away
6. 2.656km WNW of Ferndale, CATue, Dec 21, 5:27 AM PST · 1748 days ago · 18 km deep · 47 km away
7. 2.732km W of Petrolia, CATue, Dec 21, 5:50 AM PST · 1748 days ago · 20 km deep · 35 km away
8. 2.97km N of Petrolia, CATue, Dec 21, 6:09 AM PST · 1748 days ago · 25 km deep · 68 km away
9. 2.317km WSW of Petrolia, CATue, Dec 21, 6:13 AM PST · 1748 days ago · 20 km deep · 51 km away
10. 3.212km SSW of Ferndale, CATue, Dec 21, 6:16 AM PST · 1748 days ago · 28 km deep · 67 km away · felt by 11
11. 2.414km S of Ferndale, CATue, Dec 21, 6:54 AM PST · 1748 days ago · 26 km deep · 68 km away
12. 1.84km ENE of Petrolia, CATue, Dec 21, 7:49 AM PST · 1748 days ago · 23 km deep · 71 km away
13. 2.811km N of Petrolia, CATue, Dec 21, 8:50 AM PST · 1748 days ago · 24 km deep · 66 km away · felt by 5
14. 3.230km W of Petrolia, CATue, Dec 21, 9:24 AM PST · 1748 days ago · 21 km deep · 37 km away · felt by 2
15. 2.838km WNW of Petrolia, CATue, Dec 21, 1:35 PM PST · 1748 days ago · 22 km deep · 31 km away
16. 2.825km W of Petrolia, CATue, Dec 21, 3:08 PM PST · 1748 days ago · 20 km deep · 42 km away · felt by 2
17. 1.85km NNE of Petrolia, CATue, Dec 21, 10:31 PM PST · 1747 days ago · 24 km deep · 70 km away
18. 1.810km N of Petrolia, CATue, Dec 21, 10:51 PM PST · 1747 days ago · 27 km deep · 67 km away
19. 1.611km SW of Rio Dell, CAWed, Dec 22, 12:41 AM PST · 1747 days ago · 25 km deep · 76 km away
20. 1.713km NNE of Petrolia, CAWed, Dec 22, 3:37 AM PST · 1747 days ago · 26 km deep · 72 km away
21. 3.0102km WNW of Bayview, CAWed, Dec 22, 9:49 AM PST · 1747 days ago · 10 km deep · 79 km away
22. 2.57km NNE of Petrolia, CAWed, Dec 22, 10:39 AM PST · 1747 days ago · 25 km deep · 69 km away
23. 2.611km WSW of Petrolia, CAWed, Dec 22, 1:36 PM PST · 1747 days ago · 28 km deep · 57 km away
24. 2.714km S of Ferndale, CAWed, Dec 22, 5:13 PM PST · 1747 days ago · 26 km deep · 70 km away · felt by 1
25. 2.910km WSW of Petrolia, CAWed, Dec 22, 5:47 PM PST · 1747 days ago · 31 km deep · 58 km away · felt by 1
26. 3.96km N of Petrolia, CAWed, Dec 22, 7:28 PM PST · 1747 days ago · 21 km deep · 67 km away · felt by 77
27. 2.213km WSW of Petrolia, CAThu, Dec 23, 12:27 AM PST · 1746 days ago · 35 km deep · 55 km away
28. 3.26km W of Petrolia, CAThu, Dec 23, 3:24 AM PST · 1746 days ago · 31 km deep · 61 km away · felt by 3
29. 2.540km W of Petrolia, CAThu, Dec 23, 8:25 AM PST · 1746 days ago · 11 km deep · 27 km away
30. 2.915km NW of Petrolia, CAThu, Dec 23, 10:32 AM PST · 1746 days ago · 27 km deep · 60 km away
31. 2.97km WSW of Petrolia, CAThu, Dec 23, 10:55 AM PST · 1746 days ago · 30 km deep · 60 km away · felt by 2
32. 2.411km WSW of Petrolia, CAThu, Dec 23, 10:57 AM PST · 1746 days ago · 29 km deep · 58 km away
33. 2.19km NNE of Petrolia, CAThu, Dec 23, 11:29 AM PST · 1746 days ago · 25 km deep · 70 km away
34. 2.66km NNW of Petrolia, CAThu, Dec 23, 4:14 PM PST · 1746 days ago · 29 km deep · 65 km away
35. 2.55km N of Petrolia, CAThu, Dec 23, 4:20 PM PST · 1746 days ago · 26 km deep · 68 km away
36. 2.649km W of Petrolia, CAThu, Dec 23, 5:34 PM PST · 1746 days ago · 2 km deep · 18 km away
37. 2.411km SW of Petrolia, CAThu, Dec 23, 6:53 PM PST · 1746 days ago · 20 km deep · 58 km away
38. 2.734km W of Petrolia, CAThu, Dec 23, 8:29 PM PST · 1745 days ago · 23 km deep · 33 km away · felt by 1
39. 2.736km W of Petrolia, CAThu, Dec 23, 8:39 PM PST · 1745 days ago · 22 km deep · 31 km away
40. 3.19km WSW of Petrolia, CAFri, Dec 24, 4:58 AM PST · 1745 days ago · 31 km deep · 58 km away · felt by 1
41. 3.635km W of Petrolia, CAFri, Dec 24, 6:24 AM PST · 1745 days ago · 23 km deep · 32 km away · felt by 1
42. 3.344km W of Petrolia, CAFri, Dec 24, 7:51 AM PST · 1745 days ago · 10 km deep · 23 km away · felt by 1
43. 2.912km N of Petrolia, CAFri, Dec 24, 10:30 AM PST · 1745 days ago · 26 km deep · 70 km away
44. 1.74km ENE of Petrolia, CAFri, Dec 24, 3:37 PM PST · 1745 days ago · 26 km deep · 70 km away
45. 2.940km W of Petrolia, CAFri, Dec 24, 6:49 PM PST · 1745 days ago · 20 km deep · 27 km away · felt by 1
46. 2.936km W of Petrolia, CASat, Dec 25, 7:57 AM PST · 1744 days ago · 20 km deep · 31 km away
47. 1.67km N of Petrolia, CASat, Dec 25, 12:24 PM PST · 1744 days ago · 23 km deep · 68 km away
48. 2.832km W of Petrolia, CASun, Dec 26, 6:16 AM PST · 1743 days ago · 19 km deep · 35 km away · felt by 1
49. 2.08km NNE of Petrolia, CASun, Dec 26, 4:40 PM PST · 1743 days ago · 26 km deep · 70 km away
50. 2.429km W of Petrolia, CASun, Dec 26, 8:53 PM PST · 1742 days ago · 20 km deep · 38 km away
51. 2.326km W of Petrolia, CAMon, Dec 27, 12:18 AM PST · 1742 days ago · 16 km deep · 41 km away
52. 1.713km N of Petrolia, CATue, Dec 28, 5:52 AM PST · 1741 days ago · 25 km deep · 67 km away
53. 2.531km W of Petrolia, CATue, Dec 28, 8:18 AM PST · 1741 days ago · 15 km deep · 37 km away
54. 1.713km WSW of Rio Dell, CATue, Dec 28, 3:13 PM PST · 1741 days ago · 27 km deep · 72 km away
55. 2.731km W of Petrolia, CATue, Dec 28, 3:16 PM PST · 1741 days ago · 20 km deep · 36 km away
56. 2.813km S of Ferndale, CATue, Dec 28, 3:17 PM PST · 1741 days ago · 27 km deep · 71 km away
57. 2.726km W of Petrolia, CAWed, Dec 29, 2:17 AM PST · 1740 days ago · 22 km deep · 41 km away
58. 2.72km NE of Petrolia, CAWed, Dec 29, 2:59 AM PST · 1740 days ago · 28 km deep · 68 km away
59. 3.693km W of Petrolia, CAWed, Dec 29, 7:23 AM PST · 1740 days ago · 23 km deep · 27 km away
60. 2.619km W of Petrolia, CAWed, Dec 29, 7:33 AM PST · 1740 days ago · 21 km deep · 48 km away

The first 60 of 143.

Before

1. 2.27km WSW of Petrolia, CATue, Dec 21, 1:39 AM PST · 1748 days ago · 20 km deep · 60 km away
2. 1.65km E of Petrolia, CATue, Dec 21, 1:27 AM PST · 1748 days ago · 22 km deep · 71 km away
3. 2.07km N of Petrolia, CATue, Dec 21, 1:17 AM PST · 1748 days ago · 25 km deep · 68 km away
4. 2.730km W of Petrolia, CAMon, Dec 20, 9:53 PM PST · 1748 days ago · 21 km deep · 37 km away
5. 2.313km N of Petrolia, CAMon, Dec 20, 9:41 PM PST · 1748 days ago · 25 km deep · 66 km away
6. 2.225km W of Petrolia, CAMon, Dec 20, 9:15 PM PST · 1748 days ago · 19 km deep · 42 km away · felt by 1
7. 3.814km N of Petrolia, CAMon, Dec 20, 8:34 PM PST · 1748 days ago · 28 km deep · 69 km away · felt by 4
8. 2.818km NW of Petrolia, CAMon, Dec 20, 8:13 PM PST · 1748 days ago · 24 km deep · 58 km away
9. 2.817km NNW of Petrolia, CAMon, Dec 20, 7:44 PM PST · 1749 days ago · 23 km deep · 60 km away · felt by 2
10. 3.810km NNE of Petrolia, CAMon, Dec 20, 7:26 PM PST · 1749 days ago · 27 km deep · 72 km away · felt by 4
11. 2.713km WSW of Rio Dell, CAMon, Dec 20, 7:18 PM PST · 1749 days ago · 27 km deep · 72 km away
12. 2.744km WNW of Petrolia, CAMon, Dec 20, 6:48 PM PST · 1749 days ago · 17 km deep · 28 km away
13. 2.69km N of Petrolia, CAMon, Dec 20, 6:46 PM PST · 1749 days ago · 27 km deep · 69 km away
14. 2.57km N of Petrolia, CAMon, Dec 20, 6:34 PM PST · 1749 days ago · 25 km deep · 68 km away
15. 2.89km NNE of Petrolia, CAMon, Dec 20, 6:31 PM PST · 1749 days ago · 23 km deep · 71 km away
16. 1.69km NNE of Petrolia, CAMon, Dec 20, 6:25 PM PST · 1749 days ago · 23 km deep · 71 km away
17. 2.815km WSW of Petrolia, CAMon, Dec 20, 5:44 PM PST · 1749 days ago · 20 km deep · 52 km away
18. 2.46km N of Petrolia, CAMon, Dec 20, 5:20 PM PST · 1749 days ago · 25 km deep · 67 km away
19. 1.820km SSE of Rio Dell, CAMon, Dec 20, 5:16 PM PST · 1749 days ago · 29 km deep · 87 km away
20. 2.38km NNE of Petrolia, CAMon, Dec 20, 5:16 PM PST · 1749 days ago · 24 km deep · 70 km away

From the USGS Earthquake Hazards Program and its partner networks, event us6000ge55. Read Sun, Oct 4, 2026, 3:20 PM UTC.