California earthquakes

M1.6 earthquake 23 km W of Three Rocks, California

A magnitude 1.6 earthquake struck 23 km W of Three Rocks, California on Sat, Jul 20, 2002, 8:17 AM PDT (15:17 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.9 4 km SSE 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2002-07-20 15:17:41 UTC
Depth
9.0 km (5.6 mi), shallow
Epicenter
36.462° N, 120.646° 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, 1.0 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
83°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 124 in the 60 days after this one and 78 in the 30 days before it.

After

  1. 1.87 km ENE of Gilroy, California · 8843 days ago · 7 km deep · 99 km away
  2. 1.721 km NE of Soledad, California · 8842 days ago · 5 km deep · 44 km away
  3. 1.612 km SSE of Tres Pinos, California · 8841 days ago · 7 km deep · 62 km away
  4. 1.98 km SE of San Juan Bautista, California · 8841 days ago · 3 km deep · 83 km away
  5. 2.40 km ENE of Gonzales, California · 8841 days ago · 11 km deep · 72 km away
  6. 1.79 km NW of Parkfield, California · 8840 days ago · 5 km deep · 57 km away
  7. 1.77 km NE of San Juan Bautista, California · 8840 days ago · 9 km deep · 89 km away
  8. 1.74 km S of Gilroy, California · 8840 days ago · 0 km deep · 99 km away
  9. 1.921 km NNE of Soledad, California · 8839 days ago · 7 km deep · 51 km away
  10. 2.1Central California · 8839 days ago · 4 km deep · 52 km away
  11. 1.623 km ENE of Soledad, California · 8838 days ago · 4 km deep · 39 km away
  12. 2.05 km SSE of Kettleman City, California · 8838 days ago · 20 km deep · 85 km away
  13. 1.93 km ESE of Tres Pinos, California · 8837 days ago · 9 km deep · 67 km away
  14. 1.63 km NNW of Hollister, California · 8837 days ago · 8 km deep · 83 km away
  15. 1.72 km W of Ridgemark, California · 8837 days ago · 6 km deep · 77 km away
  16. 2.22 km E of Aromas, California · 8836 days ago · 7 km deep · 99 km away
  17. 1.57 km NE of San Juan Bautista, California · 8835 days ago · 9 km deep · 89 km away
  18. 1.923 km NE of Soledad, California · 8834 days ago · 9 km deep · 44 km away
  19. 2.021 km NE of Soledad, California · 8834 days ago · 3 km deep · 47 km away
  20. 1.71 km E of Aromas, California · 8834 days ago · 8 km deep · 99 km away
  21. 1.624 km WSW of Coalinga, California · 8833 days ago · 2 km deep · 44 km away
  22. 2.425 km NW of Parkfield, California · 8833 days ago · 2 km deep · 44 km away
  23. 2.71 km ESE of Aromas, California · 8832 days ago · 8 km deep · 99 km away
  24. 1.812 km S of Tres Pinos, California · 8832 days ago · 2 km deep · 64 km away
  25. 3.124 km S of Kettleman City, California · 8832 days ago · 6 km deep · 95 km away
  26. 1.524 km S of Kettleman City, California · 8832 days ago · 1 km deep · 96 km away
  27. 1.724 km S of Kettleman City, California · 8832 days ago · 4 km deep · 95 km away
  28. 1.624 km NE of Soledad, California · 8832 days ago · 8 km deep · 44 km away
  29. 1.725 km ENE of San Ardo, California · 8832 days ago · 0 km deep · 44 km away
  30. 1.92 km ESE of Aromas, California · 8831 days ago · 8 km deep · 99 km away
  31. 1.822 km S of Kettleman City, California · 8831 days ago · 7 km deep · 94 km away
  32. 2.024 km ENE of Greenfield, California · 8831 days ago · 5 km deep · 31 km away
  33. 2.516 km NW of Parkfield, California · 8830 days ago · 4 km deep · 51 km away
  34. 1.523 km NE of Soledad, California · 8830 days ago · 9 km deep · 44 km away
  35. 1.622 km NNE of Soledad, California · 8830 days ago · 1 km deep · 52 km away
  36. 2.10 km SSW of Parkfield, California · 8829 days ago · 11 km deep · 66 km away
  37. 1.528 km SE of Big Sur, California · 8829 days ago · 8 km deep · 97 km away
  38. 1.711 km N of Coalinga, California · 8829 days ago · 8 km deep · 35 km away
  39. 1.625 km WSW of Coalinga, California · 8829 days ago · 1 km deep · 44 km away
  40. 2.13 km SSE of San Juan Bautista, California · 8829 days ago · 4 km deep · 88 km away
  41. 2.215 km NW of Parkfield, California · 8828 days ago · 10 km deep · 52 km away
  42. 2.013 km ENE of Bradley, California · 8827 days ago · 11 km deep · 60 km away
  43. 3.113 km NE of Bradley, California · 8827 days ago · 11 km deep · 59 km away
  44. 2.513 km ENE of Bradley, California · 8827 days ago · 12 km deep · 59 km away
  45. 1.824 km WNW of Coalinga, California · 8827 days ago · 12 km deep · 25 km away
  46. 1.612 km NE of Bradley, California · 8827 days ago · 10 km deep · 59 km away
  47. 2.42 km SW of San Juan Bautista, California · 8827 days ago · 7 km deep · 91 km away
  48. 1.621 km NW of Parkfield, California · 8825 days ago · 2 km deep · 47 km away
  49. 1.624 km ENE of Soledad, California · 8825 days ago · 3 km deep · 38 km away
  50. 1.8Central California · 8824 days ago · 0 km deep · 96 km away
  51. 1.633 km W of Three Rocks, California · 8824 days ago · 8 km deep · 13 km away
  52. 2.422 km NE of Soledad, California · 8824 days ago · 6 km deep · 50 km away
  53. 1.68 km W of San Ardo, California · 8823 days ago · 8 km deep · 57 km away
  54. 2.85 km ENE of Coalinga, California · 8823 days ago · 14 km deep · 45 km away
  55. 2.213 km S of Tres Pinos, California · 8822 days ago · 3 km deep · 62 km away
  56. 1.817 km SSE of Tres Pinos, California · 8821 days ago · 4 km deep · 58 km away
  57. 1.822 km NE of Soledad, California · 8821 days ago · 3 km deep · 50 km away
  58. 2.16 km W of Madera Acres, California · 8820 days ago · 0 km deep · 76 km away
  59. 2.19 km NE of Coalinga, California · 8820 days ago · 10 km deep · 44 km away
  60. 2.023 km ENE of San Ardo, California · 8818 days ago · 7 km deep · 41 km away

The first 60 of 124.

Before

  1. 2.121 km SE of Big Sur, California · 8843 days ago · 2 km deep · 98 km away
  2. 1.732 km WNW of Coalinga, California · 8845 days ago · 13 km deep · 21 km away
  3. 1.822 km WSW of Three Rocks, California · 8845 days ago · 15 km deep · 1 km away
  4. 1.810 km WSW of Ridgemark, California · 8845 days ago · 6 km deep · 80 km away
  5. 2.817 km SSE of Tres Pinos, California · 8846 days ago · 10 km deep · 58 km away
  6. 2.37 km ENE of Gilroy, California · 8846 days ago · 8 km deep · 98 km away
  7. 2.325 km SE of Tres Pinos, California · 8846 days ago · 8 km deep · 46 km away
  8. 1.89 km ESE of Huron, California · 8846 days ago · 8 km deep · 66 km away
  9. 1.58 km W of Paso Robles, California · 8847 days ago · 11 km deep · 93 km away
  10. 1.78 km NNE of Cambria, California · 8847 days ago · 7 km deep · 99 km away
  11. 2.117 km SSE of Tres Pinos, California · 8847 days ago · 6 km deep · 58 km away
  12. 2.622 km NE of Soledad, California · 8847 days ago · 3 km deep · 50 km away
  13. 1.513 km W of Oak Shores, California · 8847 days ago · 6 km deep · 86 km away
  14. 2.519 km SW of King City, California · 8847 days ago · 12 km deep · 71 km away
  15. 1.725 km ENE of Soledad, California · 8848 days ago · 9 km deep · 41 km away
  16. 1.923 km NNE of San Lucas, California · 8848 days ago · 3 km deep · 28 km away
  17. 1.72 km W of Ridgemark, California · 8848 days ago · 7 km deep · 77 km away
  18. 2.917 km NNW of Coalinga, California · 8849 days ago · 10 km deep · 29 km away
  19. 2.033 km WSW of Lockwood, California · 8849 days ago · 1 km deep · 97 km away
  20. 1.72 km W of Ridgemark, California · 8850 days ago · 6 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc21236465. Read Mon, Oct 5, 2026, 12:00 PM UTC.