California earthquakes

M3.5 earthquake 8 km SSE of Three Rocks, California

A magnitude 3.5 earthquake struck 8 km SSE of Three Rocks, California on Sun, Aug 3, 1975, 9:55 AM PDT (16:55 UTC), 17 km (11 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
3.5 (Md, duration), minor
Magnitude from
Northern California Seismic System
Local time
UTC
1975-08-03 16:55:24 UTC
Depth
17.3 km (10.8 mi), shallow
Epicenter
36.427° N, 120.360° 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, 1.1 km in depth
Magnitude uncertainty
±0.68
Depth from
From location
Station coverage gap
63°
Stations used
30

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 98 in the 30 days before it.

After

  1. 4.46 km S of Three Rocks, California · 18688 days ago · 11 km deep · 4 km away
  2. 3.06 km S of Three Rocks, California · 18688 days ago · 11 km deep · 4 km away
  3. 2.331 km ENE of Soledad, California · 18688 days ago · 7 km deep · 62 km away
  4. 2.224 km ENE of Greenfield, California · 18688 days ago · 5 km deep · 58 km away
  5. 3.224 km ENE of Greenfield, California · 18688 days ago · 5 km deep · 59 km away
  6. 2.122 km NE of San Lucas, California · 18688 days ago · 8 km deep · 47 km away
  7. 3.58 km S of Three Rocks, California · 18688 days ago · 10 km deep · 2 km away
  8. 3.47 km S of Three Rocks, California · 18688 days ago · 19 km deep · 3 km away
  9. 3.13 km SE of Three Rocks, California · 18688 days ago · 2 km deep · 6 km away
  10. 3.18 km S of Cantua Creek, California · 18688 days ago · 13 km deep · 3 km away
  11. 3.037 km W of Three Rocks, California · 18688 days ago · 1 km deep · 42 km away
  12. 3.120 km S of Avenal, California · 18687 days ago · 22 km deep · 70 km away
  13. 2.83 km SSE of Three Rocks, California · 18687 days ago · 7 km deep · 6 km away
  14. 3.621 km SSE of Tres Pinos, California · 18687 days ago · 4 km deep · 80 km away
  15. 3.29 km SSE of Three Rocks, California · 18687 days ago · 16 km deep · 1 km away
  16. 3.16 km S of Three Rocks, California · 18687 days ago · 14 km deep · 3 km away
  17. 2.527 km NE of Soledad, California · 18686 days ago · 9 km deep · 68 km away
  18. 2.022 km NNE of Soledad, California · 18686 days ago · 5 km deep · 79 km away
  19. 2.35 km SSW of Tres Pinos, California · 18686 days ago · 8 km deep · 95 km away
  20. 2.525 km NNE of King City, California · 18685 days ago · 1 km deep · 55 km away
  21. 2.541 km W of Three Rocks, California · 18685 days ago · 4 km deep · 46 km away
  22. 2.93 km SSW of Cantua Creek, California · 18685 days ago · 9 km deep · 5 km away
  23. 2.122 km ENE of Soledad, California · 18685 days ago · 2 km deep · 68 km away
  24. 3.322 km ENE of San Ardo, California · 18684 days ago · 3 km deep · 48 km away
  25. 3.68 km S of Three Rocks, California · 18684 days ago · 11 km deep · 2 km away
  26. 3.18 km S of Three Rocks, California · 18684 days ago · 16 km deep · 3 km away
  27. 3.98 km S of Three Rocks, California · 18684 days ago · 15 km deep · 3 km away
  28. 4.0Central California · 18683 days ago · 11 km deep · 4 km away
  29. 2.612 km S of Tres Pinos, California · 18683 days ago · 2 km deep · 89 km away
  30. 2.717 km SSE of Tres Pinos, California · 18683 days ago · 6 km deep · 83 km away
  31. 1.620 km NE of Soledad, California · 18681 days ago · 7 km deep · 73 km away
  32. 2.08 km ESE of Tres Pinos, California · 18681 days ago · 4 km deep · 86 km away
  33. 3.212 km WNW of Avenal, California · 18681 days ago · 11 km deep · 44 km away
  34. 3.027 km NE of Soledad, California · 18680 days ago · 9 km deep · 66 km away
  35. 2.824 km NE of King City, California · 18680 days ago · 2 km deep · 53 km away
  36. 2.521 km ENE of San Lucas, California · 18679 days ago · 3 km deep · 47 km away
  37. 1.814 km NNE of Shandon, California · 18679 days ago · 7 km deep · 72 km away
  38. 3.321 km NW of Parkfield, California · 18679 days ago · 3 km deep · 50 km away
  39. 2.421 km NW of Parkfield, California · 18679 days ago · 6 km deep · 50 km away
  40. 2.523 km NE of Soledad, California · 18677 days ago · 9 km deep · 71 km away
  41. 2.216 km SSE of Tres Pinos, California · 18677 days ago · 2 km deep · 84 km away
  42. 2.624 km NE of Soledad, California · 18677 days ago · 10 km deep · 70 km away
  43. 4.65 km SSW of Three Rocks, California · 18676 days ago · 12 km deep · 7 km away
  44. 2.229 km ENE of Soledad, California · 18676 days ago · 7 km deep · 64 km away
  45. 2.426 km NE of King City, California · 18675 days ago · 3 km deep · 51 km away
  46. 2.511 km NW of Parkfield, California · 18675 days ago · 12 km deep · 52 km away
  47. 2.324 km NE of Soledad, California · 18675 days ago · 7 km deep · 67 km away
  48. 1.924 km ENE of Soledad, California · 18675 days ago · 7 km deep · 68 km away
  49. 2.221 km NE of Soledad, California · 18675 days ago · 5 km deep · 75 km away
  50. 4.16 km S of Three Rocks, California · 18675 days ago · 16 km deep · 3 km away
  51. 2.321 km NNE of Soledad, California · 18674 days ago · 4 km deep · 77 km away
  52. 2.335 km ENE of Soledad, California · 18674 days ago · 6 km deep · 55 km away
  53. 3.75 km SW of Three Rocks, California · 18674 days ago · 16 km deep · 7 km away
  54. 3.516 km NW of Parkfield, California · 18674 days ago · 4 km deep · 51 km away
  55. 2.422 km ENE of San Ardo, California · 18673 days ago · 3 km deep · 46 km away
  56. 3.225 km ENE of Greenfield, California · 18673 days ago · 1 km deep · 58 km away
  57. 2.123 km ENE of Soledad, California · 18672 days ago · 1 km deep · 67 km away
  58. 1.824 km ESE of Tres Pinos, California · 18672 days ago · 4 km deep · 71 km away
  59. 2.621 km NE of Soledad, California · 18671 days ago · 2 km deep · 71 km away
  60. 1.731 km SE of Tres Pinos, California · 18671 days ago · 2 km deep · 64 km away

The first 60 of at least 199.

Before

  1. 3.84 km S of Three Rocks, California · 18688 days ago · 9 km deep · 5 km away
  2. 3.18 km S of Three Rocks, California · 18688 days ago · 15 km deep · 3 km away
  3. 3.5Central California · 18688 days ago · 11 km deep · 3 km away
  4. 3.07 km S of Three Rocks, California · 18688 days ago · 18 km deep · 2 km away
  5. 2.98 km SSE of Three Rocks, California · 18688 days ago · 3 km deep · 0 km away
  6. 1.613 km S of Tres Pinos, California · 18688 days ago · 5 km deep · 88 km away
  7. 2.4Central California · 18688 days ago · 4 km deep · 88 km away
  8. 3.57 km S of Three Rocks, California · 18689 days ago · 15 km deep · 3 km away
  9. 3.25 km SSE of Three Rocks, California · 18689 days ago · 11 km deep · 3 km away
  10. 3.58 km S of Three Rocks, California · 18689 days ago · 10 km deep · 2 km away
  11. 3.68 km SSE of Three Rocks, California · 18689 days ago · 9 km deep · 1 km away
  12. 4.15 km S of Three Rocks, California · 18689 days ago · 7 km deep · 3 km away
  13. 3.62 km SSE of Three Rocks, California · 18689 days ago · 8 km deep · 6 km away
  14. 3.65 km SSE of Three Rocks, California · 18689 days ago · 9 km deep · 3 km away
  15. 3.96 km S of Three Rocks, California · 18689 days ago · 9 km deep · 4 km away
  16. 3.08 km SSE of Three Rocks, California · 18689 days ago · 10 km deep · 1 km away
  17. 4.63 km SSW of Three Rocks, California · 18689 days ago · 11 km deep · 6 km away
  18. 3.63 km S of Three Rocks, California · 18689 days ago · 10 km deep · 6 km away
  19. 2.94 km S of Three Rocks, California · 18689 days ago · 12 km deep · 5 km away
  20. 4.14 km SW of Cantua Creek, California · 18689 days ago · 5 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1025261. Read Fri, Oct 2, 2026, 9:48 PM UTC.