California earthquakes

M1.8 earthquake 39 km W of Three Rocks, California

A magnitude 1.8 earthquake struck 39 km W of Three Rocks, California on Sat, Dec 21, 1985, 2:34 PM PST (22:34 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M5.5 3 km ENE of Tres Pinos, California. 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
1.8 (md), micro
Local time
UTC
1985-12-21 22:34:37 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
36.549° N, 120.832° 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 0.4 km horizontally, 2.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
118°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 196 in the 60 days after this one and 132 in the 30 days before it.

After

  1. 1.810 km NE of Coalinga, California · 14890 days ago · 9 km deep · 64 km away
  2. 2.16 km NW of Parkfield, California · 14890 days ago · 5 km deep · 75 km away
  3. 2.728 km ENE of Soledad, California · 14890 days ago · 9 km deep · 20 km away
  4. 3.011 km NE of Coalinga, California · 14889 days ago · 9 km deep · 65 km away
  5. 2.724 km NE of Greenfield, California · 14887 days ago · 1 km deep · 21 km away
  6. 2.613 km N of Hollister, California · 14887 days ago · 6 km deep · 67 km away
  7. 1.99 km NNW of Coalinga, California · 14887 days ago · 7 km deep · 53 km away
  8. 1.916 km SSE of Tres Pinos, California · 14886 days ago · 8 km deep · 41 km away
  9. 3.018 km WSW of Volta, California · 14886 days ago · 3 km deep · 63 km away
  10. 1.57 km NE of Interlaken, California · 14886 days ago · 10 km deep · 89 km away
  11. 1.623 km ENE of San Lucas, California · 14885 days ago · 8 km deep · 38 km away
  12. 1.89 km E of Coalinga, California · 14885 days ago · 10 km deep · 69 km away
  13. 2.13 km W of San Juan Bautista, California · 14885 days ago · 6 km deep · 75 km away
  14. 1.918 km WSW of Volta, California · 14884 days ago · 2 km deep · 63 km away
  15. 2.020 km SSE of Tres Pinos, California · 14883 days ago · 5 km deep · 36 km away
  16. 1.520 km WSW of Coalinga, California · 14883 days ago · 2 km deep · 57 km away
  17. 1.54 km SSE of San Juan Bautista, California · 14882 days ago · 3 km deep · 68 km away
  18. 2.221 km NE of Soledad, California · 14882 days ago · 6 km deep · 28 km away
  19. 2.06 km N of Coalinga, California · 14882 days ago · 9 km deep · 56 km away
  20. 1.67 km NE of Interlaken, California · 14881 days ago · 11 km deep · 89 km away
  21. 1.622 km NE of San Lucas, California · 14881 days ago · 5 km deep · 28 km away
  22. 1.917 km NNW of Coalinga, California · 14880 days ago · 12 km deep · 46 km away
  23. 1.97 km WSW of Gilroy, California · 14880 days ago · 6 km deep · 88 km away
  24. 2.117 km NNW of Coalinga, California · 14879 days ago · 10 km deep · 45 km away
  25. 2.217 km NNW of Coalinga, California · 14879 days ago · 12 km deep · 46 km away
  26. 2.13 km ESE of Diablo Grande, California · 14879 days ago · 2 km deep · 99 km away
  27. 2.816 km NNW of Coalinga, California · 14879 days ago · 9 km deep · 48 km away
  28. 2.030 km ENE of Soledad, California · 14878 days ago · 7 km deep · 18 km away
  29. 2.324 km ENE of Soledad, California · 14877 days ago · 3 km deep · 22 km away
  30. 1.821 km NE of Soledad, California · 14875 days ago · 6 km deep · 27 km away
  31. 1.727 km NE of Soledad, California · 14875 days ago · 8 km deep · 22 km away
  32. 1.72 km ESE of Tres Pinos, California · 14875 days ago · 8 km deep · 49 km away
  33. 3.79 km E of Gilroy, California · 14875 days ago · 9 km deep · 76 km away
  34. 1.63 km WNW of Coalinga, California · 14875 days ago · 9 km deep · 59 km away
  35. 2.16 km WSW of Gilroy, California · 14875 days ago · 5 km deep · 86 km away
  36. 1.715 km W of Volta, CA · 14874 days ago · 3 km deep · 65 km away
  37. 1.5Central California · 14874 days ago · 9 km deep · 56 km away
  38. 1.937 km NE of King City, California · 14873 days ago · 12 km deep · 10 km away
  39. 2.421 km NE of Soledad, California · 14872 days ago · 2 km deep · 29 km away
  40. 1.87 km NE of Interlaken, California · 14872 days ago · 9 km deep · 90 km away
  41. 1.811 km N of Coalinga, California · 14872 days ago · 8 km deep · 54 km away
  42. 1.61 km E of San Ardo, California · 14872 days ago · 10 km deep · 59 km away
  43. 1.81 km WSW of Coalinga, California · 14870 days ago · 12 km deep · 62 km away
  44. 1.72 km N of San Martin, California · 14870 days ago · 4 km deep · 94 km away
  45. 1.917 km SSE of Tres Pinos, California · 14870 days ago · 5 km deep · 39 km away
  46. 1.624 km ENE of San Ardo, California · 14870 days ago · 3 km deep · 54 km away
  47. 1.720 km N of Coalinga, California · 14870 days ago · 11 km deep · 47 km away
  48. 2.822 km NE of Soledad, California · 14869 days ago · 3 km deep · 31 km away
  49. 2.029 km NE of Soledad, California · 14869 days ago · 5 km deep · 21 km away
  50. 1.910 km ENE of Coalinga, California · 14869 days ago · 11 km deep · 66 km away
  51. 1.710 km ENE of Coalinga, California · 14869 days ago · 11 km deep · 66 km away
  52. 1.921 km SW of Diablo Grande, California · 14869 days ago · 4 km deep · 98 km away
  53. 2.230 km ENE of Soledad, California · 14869 days ago · 7 km deep · 18 km away
  54. 1.611 km S of Huron, California · 14869 days ago · 8 km deep · 83 km away
  55. 1.65 km ENE of Avenal, California · 14868 days ago · 10 km deep · 90 km away
  56. 1.82 km SSW of Morgan Hill, California · 14868 days ago · 16 km deep · 97 km away
  57. 1.918 km SSE of Tres Pinos, California · 14868 days ago · 10 km deep · 39 km away
  58. 3.421 km NE of Soledad, California · 14868 days ago · 7 km deep · 31 km away
  59. 4.822 km NE of Soledad, California · 14868 days ago · 6 km deep · 31 km away
  60. 2.522 km NNE of Soledad, California · 14868 days ago · 6 km deep · 33 km away

The first 60 of 196.

Before

  1. 1.812 km SSE of Huron, California · 14891 days ago · 7 km deep · 85 km away
  2. 1.66 km NNE of Ridgemark, California · 14891 days ago · 6 km deep · 56 km away
  3. 1.73 km S of San Juan Bautista, California · 14892 days ago · 4 km deep · 69 km away
  4. 1.621 km NE of Soledad, California · 14892 days ago · 3 km deep · 30 km away
  5. 2.022 km NW of Parkfield, California · 14892 days ago · 6 km deep · 59 km away
  6. 1.67 km WNW of Kettleman City, California · 14892 days ago · 10 km deep · 91 km away
  7. 2.49 km SSW of Ridgemark, California · 14893 days ago · 6 km deep · 55 km away
  8. 1.921 km NE of Soledad, California · 14893 days ago · 7 km deep · 32 km away
  9. 2.1Central California · 14893 days ago · 18 km deep · 42 km away
  10. 1.97 km NE of Interlaken, California · 14894 days ago · 10 km deep · 89 km away
  11. 1.98 km NE of Coalinga, California · 14894 days ago · 10 km deep · 61 km away
  12. 2.321 km NE of Soledad, California · 14894 days ago · 7 km deep · 32 km away
  13. 1.61 km ESE of San Ardo, California · 14894 days ago · 11 km deep · 59 km away
  14. 1.77 km NNE of Coalinga, California · 14895 days ago · 7 km deep · 58 km away
  15. 1.617 km NW of Parkfield, California · 14895 days ago · 3 km deep · 64 km away
  16. 2.32 km ESE of San Ardo, California · 14895 days ago · 10 km deep · 59 km away
  17. 1.88 km SE of San Juan Bautista, California · 14895 days ago · 4 km deep · 64 km away
  18. 1.88 km SE of San Juan Bautista, California · 14895 days ago · 4 km deep · 64 km away
  19. 2.17 km NE of Interlaken, California · 14896 days ago · 10 km deep · 89 km away
  20. 1.815 km NW of Parkfield, California · 14897 days ago · 5 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc61956. Read Mon, Sep 28, 2026, 6:23 PM UTC.