California earthquakes

M2.4 earthquake 7km NNW of Petrolia, CA

A magnitude 2.4 earthquake struck 7km NNW of Petrolia, CA on Mon, Dec 20, 2021, 3:11 PM PST (23:11 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M4.6 50km W of Petrolia, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.4 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-12-20 23:11:41 UTC
Depth
26.3 km (16.3 mi), shallow
Epicenter
40.383° N, 124.301° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.5 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.47
Depth from
From location
Station coverage gap
174°
Stations used
19

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 193 in the 60 days after this one and 99 in the 30 days before it.

After

  1. 2.621km W of Petrolia, CA · 1749 days ago · 21 km deep · 22 km away
  2. 1.920km SSE of Rio Dell, CA · 1749 days ago · 31 km deep · 22 km away
  3. 2.729km W of Petrolia, CA · 1749 days ago · 21 km deep · 28 km away · felt by 1
  4. 2.28km N of Petrolia, CA · 1749 days ago · 26 km deep · 2 km away
  5. 2.311km SSW of Ferndale, CA · 1749 days ago · 19 km deep · 11 km away
  6. 2.814km N of Petrolia, CA · 1749 days ago · 23 km deep · 7 km away
  7. 1.97km N of Petrolia, CA · 1749 days ago · 26 km deep · 2 km away
  8. 1.814km N of Petrolia, CA · 1749 days ago · 23 km deep · 8 km away
  9. 1.79km SSW of Ferndale, CA · 1749 days ago · 18 km deep · 13 km away
  10. 3.08km SSW of Ferndale, CA · 1749 days ago · 18 km deep · 14 km away · felt by 1
  11. 2.311km SSW of Ferndale, CA · 1749 days ago · 19 km deep · 11 km away
  12. 2.88km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 5 km away
  13. 2.627km W of Petrolia, CA · 1749 days ago · 19 km deep · 27 km away
  14. 2.66km SE of Ferndale, CA · 1749 days ago · 26 km deep · 19 km away
  15. 2.557km WNW of Petrolia, CA · 1749 days ago · 8 km deep · 55 km away
  16. 2.28km NNE of Petrolia, CA · 1749 days ago · 25 km deep · 4 km away
  17. 1.98km N of Petrolia, CA · 1749 days ago · 24 km deep · 2 km away
  18. 2.38km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 4 km away
  19. 1.820km SSE of Rio Dell, CA · 1749 days ago · 29 km deep · 22 km away
  20. 2.46km N of Petrolia, CA · 1749 days ago · 25 km deep · 1 km away
  21. 2.815km WSW of Petrolia, CA · 1749 days ago · 20 km deep · 17 km away
  22. 1.69km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 5 km away
  23. 2.89km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 5 km away
  24. 2.57km N of Petrolia, CA · 1749 days ago · 25 km deep · 2 km away
  25. 2.69km N of Petrolia, CA · 1749 days ago · 27 km deep · 3 km away
  26. 2.744km WNW of Petrolia, CA · 1749 days ago · 17 km deep · 41 km away
  27. 2.713km WSW of Rio Dell, CA · 1748 days ago · 27 km deep · 9 km away
  28. 3.810km NNE of Petrolia, CA · 1748 days ago · 27 km deep · 6 km away · felt by 4
  29. 2.817km NNW of Petrolia, CA · 1748 days ago · 23 km deep · 11 km away · felt by 2
  30. 2.818km NW of Petrolia, CA · 1748 days ago · 24 km deep · 12 km away
  31. 3.814km N of Petrolia, CA · 1748 days ago · 28 km deep · 7 km away · felt by 4
  32. 2.225km W of Petrolia, CA · 1748 days ago · 19 km deep · 25 km away · felt by 1
  33. 2.313km N of Petrolia, CA · 1748 days ago · 25 km deep · 6 km away
  34. 2.730km W of Petrolia, CA · 1748 days ago · 21 km deep · 29 km away
  35. 2.07km N of Petrolia, CA · 1748 days ago · 25 km deep · 2 km away
  36. 1.65km E of Petrolia, CA · 1748 days ago · 22 km deep · 9 km away
  37. 2.27km WSW of Petrolia, CA · 1748 days ago · 20 km deep · 11 km away
  38. 2.774 km WSW of Ferndale, California · 1748 days ago · 10 km deep · 66 km away
  39. 2.828km W of Petrolia, CA · 1748 days ago · 17 km deep · 28 km away
  40. 1.67km S of Ferndale, CA · 1748 days ago · 23 km deep · 15 km away
  41. 1.812km SSW of Ferndale, CA · 1748 days ago · 19 km deep · 10 km away
  42. 1.610km SSW of Ferndale, CA · 1748 days ago · 23 km deep · 11 km away
  43. 1.68km N of Petrolia, CA · 1748 days ago · 25 km deep · 2 km away
  44. 2.656km WNW of Ferndale, CA · 1748 days ago · 18 km deep · 63 km away
  45. 2.732km W of Petrolia, CA · 1748 days ago · 20 km deep · 32 km away
  46. 2.97km N of Petrolia, CA · 1748 days ago · 25 km deep · 2 km away
  47. 2.317km WSW of Petrolia, CA · 1748 days ago · 20 km deep · 18 km away
  48. 3.212km SSW of Ferndale, CA · 1748 days ago · 28 km deep · 10 km away · felt by 11
  49. 2.414km S of Ferndale, CA · 1748 days ago · 26 km deep · 8 km away
  50. 1.84km ENE of Petrolia, CA · 1748 days ago · 23 km deep · 7 km away
  51. 2.811km N of Petrolia, CA · 1748 days ago · 24 km deep · 4 km away · felt by 5
  52. 3.230km W of Petrolia, CA · 1748 days ago · 21 km deep · 30 km away · felt by 2
  53. 2.838km WNW of Petrolia, CA · 1748 days ago · 22 km deep · 36 km away
  54. 2.825km W of Petrolia, CA · 1748 days ago · 20 km deep · 26 km away · felt by 2
  55. 1.85km NNE of Petrolia, CA · 1747 days ago · 24 km deep · 5 km away
  56. 1.810km N of Petrolia, CA · 1747 days ago · 27 km deep · 4 km away
  57. 1.611km SW of Rio Dell, CA · 1747 days ago · 25 km deep · 10 km away
  58. 1.713km NNE of Petrolia, CA · 1747 days ago · 26 km deep · 8 km away
  59. 2.57km NNE of Petrolia, CA · 1747 days ago · 25 km deep · 3 km away
  60. 2.611km WSW of Petrolia, CA · 1747 days ago · 28 km deep · 15 km away

The first 60 of 193.

Before

  1. 2.512km SW of Rio Dell, CA · 1749 days ago · 28 km deep · 9 km away
  2. 2.011km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 7 km away
  3. 2.622km SW of Ferndale, CA · 1749 days ago · 27 km deep · 18 km away
  4. 2.829km W of Petrolia, CA · 1749 days ago · 19 km deep · 29 km away · felt by 3
  5. 2.833km W of Petrolia, CA · 1749 days ago · 19 km deep · 32 km away
  6. 2.610km NNW of Petrolia, CA · 1749 days ago · 26 km deep · 3 km away
  7. 2.320km NNE of Redway, CA · 1749 days ago · 26 km deep · 46 km away · felt by 3
  8. 2.012km S of Ferndale, CA · 1749 days ago · 24 km deep · 10 km away
  9. 2.37km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 3 km away · felt by 4
  10. 2.410km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 5 km away
  11. 2.68km W of Petrolia, CA · 1749 days ago · 31 km deep · 8 km away · felt by 2
  12. 1.94km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 4 km away
  13. 3.96km NE of Petrolia, CA · 1749 days ago · 27 km deep · 7 km away · felt by 1
  14. 3.318km SW of Ferndale, CA · 1749 days ago · 25 km deep · 15 km away · felt by 2
  15. 2.212km SSW of Ferndale, CA · 1749 days ago · 21 km deep · 11 km away
  16. 2.312km SW of Rio Dell, CA · 1749 days ago · 29 km deep · 9 km away
  17. 2.411km SSW of Ferndale, CA · 1749 days ago · 21 km deep · 11 km away
  18. 2.411km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 7 km away
  19. 2.414km NNW of Petrolia, CA · 1749 days ago · 22 km deep · 8 km away
  20. 3.211km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 6 km away · felt by 1

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73666596. Read Sun, Oct 4, 2026, 2:33 PM UTC.