California earthquakes

M3.6 earthquake 8 km S of Three Rocks, California

A magnitude 3.6 earthquake struck 8 km S of Three Rocks, California on Thu, Aug 7, 1975, 2:42 PM PDT (21:42 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M4.8 14 km NW of Parkfield, 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
3.6 (Md, duration), minor
Magnitude from
Northern California Seismic System
Local time
UTC
1975-08-07 21:42:00 UTC
Depth
11.3 km (7.0 mi), shallow
Epicenter
36.431° N, 120.378° 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, 1.6 km in depth
Magnitude uncertainty
±0.57
Depth from
From location
Station coverage gap
69°
Stations used
46

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 115 in the 30 days before it.

After

  1. 3.18 km S of Three Rocks, California · 18686 days ago · 16 km deep · 1 km away
  2. 3.98 km S of Three Rocks, California · 18686 days ago · 15 km deep · 1 km away
  3. 4.0Central California · 18685 days ago · 11 km deep · 4 km away
  4. 2.612 km S of Tres Pinos, California · 18685 days ago · 2 km deep · 87 km away
  5. 2.717 km SSE of Tres Pinos, California · 18685 days ago · 6 km deep · 82 km away
  6. 1.620 km NE of Soledad, California · 18683 days ago · 7 km deep · 71 km away
  7. 2.08 km ESE of Tres Pinos, California · 18683 days ago · 4 km deep · 85 km away
  8. 3.212 km WNW of Avenal, California · 18683 days ago · 11 km deep · 45 km away
  9. 3.027 km NE of Soledad, California · 18682 days ago · 9 km deep · 64 km away
  10. 2.824 km NE of King City, California · 18682 days ago · 2 km deep · 51 km away
  11. 2.521 km ENE of San Lucas, California · 18681 days ago · 3 km deep · 46 km away
  12. 1.814 km NNE of Shandon, California · 18681 days ago · 7 km deep · 73 km away
  13. 3.321 km NW of Parkfield, California · 18681 days ago · 3 km deep · 49 km away
  14. 2.421 km NW of Parkfield, California · 18681 days ago · 6 km deep · 49 km away
  15. 2.523 km NE of Soledad, California · 18679 days ago · 9 km deep · 69 km away
  16. 2.216 km SSE of Tres Pinos, California · 18679 days ago · 2 km deep · 83 km away
  17. 2.624 km NE of Soledad, California · 18679 days ago · 10 km deep · 68 km away
  18. 4.65 km SSW of Three Rocks, California · 18678 days ago · 12 km deep · 5 km away
  19. 2.229 km ENE of Soledad, California · 18678 days ago · 7 km deep · 62 km away
  20. 2.426 km NE of King City, California · 18677 days ago · 3 km deep · 50 km away
  21. 2.511 km NW of Parkfield, California · 18677 days ago · 12 km deep · 52 km away
  22. 2.324 km NE of Soledad, California · 18677 days ago · 7 km deep · 66 km away
  23. 1.924 km ENE of Soledad, California · 18677 days ago · 7 km deep · 66 km away
  24. 2.221 km NE of Soledad, California · 18677 days ago · 5 km deep · 73 km away
  25. 4.16 km S of Three Rocks, California · 18677 days ago · 16 km deep · 1 km away
  26. 2.321 km NNE of Soledad, California · 18676 days ago · 4 km deep · 75 km away
  27. 2.335 km ENE of Soledad, California · 18676 days ago · 6 km deep · 54 km away
  28. 3.75 km SW of Three Rocks, California · 18676 days ago · 16 km deep · 6 km away
  29. 3.516 km NW of Parkfield, California · 18676 days ago · 4 km deep · 51 km away
  30. 2.422 km ENE of San Ardo, California · 18675 days ago · 3 km deep · 46 km away
  31. 3.225 km ENE of Greenfield, California · 18675 days ago · 1 km deep · 56 km away
  32. 2.123 km ENE of Soledad, California · 18674 days ago · 1 km deep · 65 km away
  33. 1.824 km ESE of Tres Pinos, California · 18673 days ago · 4 km deep · 69 km away
  34. 2.621 km NE of Soledad, California · 18673 days ago · 2 km deep · 69 km away
  35. 1.731 km SE of Tres Pinos, California · 18673 days ago · 2 km deep · 63 km away
  36. 2.05 km SSW of Tres Pinos, California · 18673 days ago · 8 km deep · 93 km away
  37. 2.021 km NE of Soledad, California · 18673 days ago · 8 km deep · 74 km away
  38. 2.219 km WNW of Lockwood, California · 18673 days ago · 5 km deep · 91 km away
  39. 2.721 km NE of Soledad, California · 18673 days ago · 2 km deep · 70 km away
  40. 2.24 km NE of Tres Pinos, California · 18673 days ago · 8 km deep · 92 km away
  41. 3.422 km ENE of Soledad, California · 18672 days ago · 3 km deep · 67 km away
  42. 4.37 km S of Three Rocks, California · 18672 days ago · 16 km deep · 1 km away
  43. 1.920 km ESE of Tres Pinos, California · 18672 days ago · 0 km deep · 73 km away
  44. 2.421 km NE of Soledad, California · 18672 days ago · 2 km deep · 70 km away
  45. 2.921 km NE of Soledad, California · 18671 days ago · 6 km deep · 71 km away
  46. 2.525 km ENE of San Ardo, California · 18671 days ago · 8 km deep · 44 km away
  47. 2.623 km NE of King City, California · 18671 days ago · 3 km deep · 50 km away
  48. 2.228 km NE of Soledad, California · 18670 days ago · 8 km deep · 65 km away
  49. 2.521 km NE of Soledad, California · 18670 days ago · 2 km deep · 70 km away
  50. 2.2Central California · 18670 days ago · 2 km deep · 69 km away
  51. 3.2Near the coast of Central California · 18669 days ago · 8 km deep · 94 km away
  52. 1.727 km SE of Tres Pinos, California · 18669 days ago · 7 km deep · 69 km away
  53. 2.9Central California · 18669 days ago · 4 km deep · 50 km away
  54. 3.518 km NW of Parkfield, California · 18669 days ago · 5 km deep · 50 km away
  55. 3.517 km NW of Parkfield, California · 18669 days ago · 4 km deep · 51 km away
  56. 3.523 km NE of San Ardo, California · 18669 days ago · 7 km deep · 43 km away
  57. 2.3Central California · 18668 days ago · 9 km deep · 69 km away
  58. 2.523 km ENE of Soledad, California · 18668 days ago · 4 km deep · 64 km away
  59. 2.923 km ENE of Soledad, California · 18668 days ago · 4 km deep · 64 km away
  60. 3.413 km S of Tres Pinos, California · 18668 days ago · 4 km deep · 86 km away

The first 60 of at least 199.

Before

  1. 3.322 km ENE of San Ardo, California · 18686 days ago · 3 km deep · 47 km away
  2. 2.122 km ENE of Soledad, California · 18687 days ago · 2 km deep · 66 km away
  3. 2.93 km SSW of Cantua Creek, California · 18687 days ago · 9 km deep · 6 km away
  4. 2.541 km W of Three Rocks, California · 18687 days ago · 4 km deep · 44 km away
  5. 2.525 km NNE of King City, California · 18687 days ago · 1 km deep · 53 km away
  6. 2.35 km SSW of Tres Pinos, California · 18688 days ago · 8 km deep · 93 km away
  7. 2.022 km NNE of Soledad, California · 18688 days ago · 5 km deep · 77 km away
  8. 2.527 km NE of Soledad, California · 18688 days ago · 9 km deep · 66 km away
  9. 3.16 km S of Three Rocks, California · 18688 days ago · 14 km deep · 2 km away
  10. 3.29 km SSE of Three Rocks, California · 18689 days ago · 16 km deep · 2 km away
  11. 1.82 km SW of Ridgemark, California · 18689 days ago · 8 km deep · 99 km away
  12. 3.621 km SSE of Tres Pinos, California · 18689 days ago · 4 km deep · 78 km away
  13. 2.83 km SSE of Three Rocks, California · 18689 days ago · 7 km deep · 5 km away
  14. 3.120 km S of Avenal, California · 18689 days ago · 22 km deep · 71 km away
  15. 3.037 km W of Three Rocks, California · 18690 days ago · 1 km deep · 40 km away
  16. 3.18 km S of Cantua Creek, California · 18690 days ago · 13 km deep · 5 km away
  17. 3.13 km SE of Three Rocks, California · 18690 days ago · 2 km deep · 5 km away
  18. 3.47 km S of Three Rocks, California · 18690 days ago · 19 km deep · 1 km away
  19. 3.58 km S of Three Rocks, California · 18690 days ago · 10 km deep · 1 km away
  20. 2.122 km NE of San Lucas, California · 18690 days ago · 8 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1025458. Read Sun, Oct 4, 2026, 9:02 PM UTC.