California earthquakes

M1.6 earthquake 9km ENE of Petrolia, CA

A magnitude 1.6 earthquake struck 9km ENE of Petrolia, CA on Wed, Dec 15, 2021, 6:34 PM PST (02:34 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M6.2 7km N 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-12-16 02:34:41 UTC
Depth
22.0 km (13.6 mi), shallow
Epicenter
40.352° N, 124.181° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.3 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
67°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 2.319km NW of Petrolia, CA · 1752 days ago · 18 km deep · 25 km away
  2. 2.717km SW of Ferndale, CA · 1751 days ago · 26 km deep · 24 km away
  3. 4.022km W of Petrolia, CA · 1749 days ago · 20 km deep · 31 km away · felt by 36
  4. 5.729km W of Petrolia, CA · 1749 days ago · 17 km deep · 38 km away
  5. 6.27km N of Petrolia, CA · 1749 days ago · 27 km deep · 11 km away · felt by 4,378 · PAGER yellow · tsunami flag
  6. 4.852km W of Petrolia, CA · 1749 days ago · 20 km deep · 61 km away · felt by 8
  7. 2.47km N of Petrolia, CA · 1749 days ago · 28 km deep · 9 km away
  8. 2.19km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 7 km away
  9. 2.811km N of Petrolia, CA · 1749 days ago · 25 km deep · 12 km away
  10. 2.18km N of Petrolia, CA · 1749 days ago · 25 km deep · 9 km away
  11. 2.27km N of Petrolia, CA · 1749 days ago · 24 km deep · 9 km away
  12. 2.315km NW of Petrolia, CA · 1749 days ago · 29 km deep · 20 km away
  13. 2.76km NW of Petrolia, CA · 1749 days ago · 28 km deep · 13 km away
  14. 2.86km N of Petrolia, CA · 1749 days ago · 26 km deep · 9 km away
  15. 2.311km SW of Rio Dell, CA · 1749 days ago · 28 km deep · 10 km away
  16. 2.212km N of Petrolia, CA · 1749 days ago · 25 km deep · 14 km away
  17. 1.87km N of Petrolia, CA · 1749 days ago · 23 km deep · 9 km away
  18. 2.510km ESE of Petrolia, CA · 1749 days ago · 28 km deep · 5 km away
  19. 2.68km N of Petrolia, CA · 1749 days ago · 26 km deep · 10 km away · felt by 1
  20. 2.79km SW of Petrolia, CA · 1749 days ago · 21 km deep · 17 km away
  21. 2.69km S of Ferndale, CA · 1749 days ago · 26 km deep · 17 km away
  22. 2.711km N of Petrolia, CA · 1749 days ago · 25 km deep · 13 km away
  23. 2.312km SW of Rio Dell, CA · 1749 days ago · 27 km deep · 9 km away
  24. 1.86km NNW of Petrolia, CA · 1749 days ago · 26 km deep · 10 km away
  25. 2.99km N of Petrolia, CA · 1749 days ago · 25 km deep · 10 km away · felt by 5
  26. 2.812km NNW of Petrolia, CA · 1749 days ago · 26 km deep · 14 km away · felt by 1
  27. 1.915km NNW of Petrolia, CA · 1749 days ago · 26 km deep · 18 km away
  28. 2.810km SSE of Ferndale, CA · 1749 days ago · 25 km deep · 16 km away
  29. 2.65km NNW of Petrolia, CA · 1749 days ago · 28 km deep · 11 km away
  30. 2.611km WSW of Rio Dell, CA · 1749 days ago · 25 km deep · 13 km away
  31. 2.518km W of Petrolia, CA · 1749 days ago · 20 km deep · 27 km away
  32. 1.86km NE of Petrolia, CA · 1749 days ago · 23 km deep · 4 km away
  33. 2.39km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 8 km away
  34. 2.19km NNE of Petrolia, CA · 1749 days ago · 25 km deep · 7 km away
  35. 2.16km ENE of Petrolia, CA · 1749 days ago · 28 km deep · 4 km away
  36. 2.67km N of Petrolia, CA · 1749 days ago · 26 km deep · 9 km away
  37. 3.327km W of Petrolia, CA · 1749 days ago · 18 km deep · 36 km away · felt by 13
  38. 2.94km NE of Petrolia, CA · 1749 days ago · 22 km deep · 6 km away
  39. 3.111km N of Petrolia, CA · 1749 days ago · 25 km deep · 12 km away · felt by 2
  40. 3.07km NW of Petrolia, CA · 1749 days ago · 28 km deep · 14 km away
  41. 2.59km N of Petrolia, CA · 1749 days ago · 29 km deep · 10 km away
  42. 1.88km ENE of Petrolia, CA · 1749 days ago · 30 km deep · 1 km away
  43. 3.08km SSW of Rio Dell, CA · 1749 days ago · 27 km deep · 10 km away · felt by 1
  44. 2.213km N of Petrolia, CA · 1749 days ago · 23 km deep · 14 km away
  45. 3.114km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 12 km away · felt by 3
  46. 2.813km WSW of Petrolia, CA · 1749 days ago · 22 km deep · 22 km away
  47. 2.914km SSW of Ferndale, CA · 1749 days ago · 26 km deep · 18 km away
  48. 2.57km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 8 km away
  49. 2.514km N of Petrolia, CA · 1749 days ago · 29 km deep · 12 km away
  50. 2.38km SSW of Ferndale, CA · 1749 days ago · 19 km deep · 20 km away
  51. 2.412km S of Ferndale, CA · 1749 days ago · 25 km deep · 15 km away
  52. 3.313km SSW of Ferndale, CA · 1749 days ago · 24 km deep · 16 km away · felt by 7
  53. 2.614km N of Petrolia, CA · 1749 days ago · 27 km deep · 16 km away
  54. 2.715km SW of Ferndale, CA · 1749 days ago · 26 km deep · 21 km away
  55. 2.612km SSW of Ferndale, CA · 1749 days ago · 25 km deep · 17 km away
  56. 2.04km ENE of Petrolia, CA · 1749 days ago · 21 km deep · 5 km away
  57. 3.211km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 8 km away · felt by 1
  58. 2.414km NNW of Petrolia, CA · 1749 days ago · 22 km deep · 16 km away
  59. 2.411km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 9 km away
  60. 2.411km SSW of Ferndale, CA · 1749 days ago · 21 km deep · 18 km away

The first 60 of at least 199.

Before

  1. 2.419km WSW of Petrolia, CA · 1754 days ago · 21 km deep · 28 km away
  2. 2.310km SE of Willow Creek, CA · 1757 days ago · 18 km deep · 81 km away
  3. 2.010km SSW of Ferndale, CA · 1758 days ago · 18 km deep · 19 km away
  4. 2.627km WNW of Petrolia, CA · 1759 days ago · 20 km deep · 34 km away
  5. 1.811km SSE of Blue Lake, CA · 1760 days ago · 21 km deep · 54 km away
  6. 2.740km W of Petrolia, CA · 1760 days ago · 16 km deep · 49 km away
  7. 2.713km SE of Petrolia, CA · 1760 days ago · 13 km deep · 11 km away · felt by 1
  8. 2.826km W of Petrolia, CA · 1762 days ago · 12 km deep · 35 km away
  9. 2.419km W of Petrolia, CA · 1762 days ago · 10 km deep · 28 km away
  10. 2.774km W of Petrolia, CA · 1769 days ago · 9 km deep · 83 km away
  11. 1.84km N of Hydesville, CA · 1770 days ago · 19 km deep · 27 km away
  12. 2.718km W of Petrolia, CA · 1770 days ago · 21 km deep · 27 km away
  13. 2.59km NNE of Hayfork, CA · 1771 days ago · 31 km deep · 93 km away
  14. 2.615km SE of Petrolia, CA · 1774 days ago · 11 km deep · 12 km away · felt by 1
  15. 2.313km SE of Petrolia, CA · 1774 days ago · 12 km deep · 11 km away
  16. 2.29km ESE of Willow Creek, CA · 1774 days ago · 22 km deep · 81 km away
  17. 2.647km W of Petrolia, CA · 1775 days ago · 11 km deep · 56 km away
  18. 2.421km SSE of Willow Creek, CA · 1775 days ago · 21 km deep · 72 km away
  19. 2.747km W of Petrolia, CA · 1775 days ago · 12 km deep · 56 km away
  20. 2.415km WSW of Petrolia, CA · 1776 days ago · 17 km deep · 24 km away · felt by 1

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73664191. Read Sun, Oct 4, 2026, 12:32 PM UTC.