California earthquakes

M1.7 earthquake 5 km SW of Gilroy, California

A magnitude 1.7 earthquake struck 5 km SW of Gilroy, California on Tue, Aug 20, 2002, 4:17 AM PDT (11:17 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.8 21 km NNE of Soledad, California. This one was a foreshock.

Gilroy forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2002-08-20 11:17:22 UTC
Depth
3.5 km (2.2 mi), shallow
Epicenter
36.970° N, 121.614° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
37°
Stations used
41

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 156 in the 60 days after this one and 69 in the 30 days before it.

After

  1. 2.4Central California · 8811 days ago · 6 km deep · 17 km away
  2. 1.72 km NNE of Aromas, California · 8811 days ago · 7 km deep · 7 km away
  3. 2.01 km SSE of Diablo, California · 8811 days ago · 14 km deep · 99 km away
  4. 1.71 km S of Diablo, California · 8810 days ago · 16 km deep · 99 km away
  5. 2.48 km N of East Foothills, California · 8810 days ago · 6 km deep · 57 km away
  6. 1.62 km S of Diablo, California · 8810 days ago · 13 km deep · 98 km away
  7. 2.322 km ENE of Soledad, California · 8810 days ago · 4 km deep · 68 km away
  8. 1.811 km ESE of East Foothills, California · 8810 days ago · 6 km deep · 41 km away
  9. 1.91 km SE of Diablo, California · 8810 days ago · 15 km deep · 99 km away
  10. 3.01 km SE of Diablo, California · 8810 days ago · 16 km deep · 99 km away
  11. 1.68 km ENE of Morgan Hill, California · 8810 days ago · 3 km deep · 23 km away
  12. 1.76 km NNE of Tres Pinos, California · 8809 days ago · 6 km deep · 33 km away
  13. 2.51 km SE of Diablo, California · 8809 days ago · 16 km deep · 99 km away
  14. 1.62 km SE of Diablo, California · 8809 days ago · 14 km deep · 98 km away
  15. 1.96 km NNE of Milpitas, California · 8809 days ago · 1 km deep · 61 km away
  16. 2.514 km ESE of Livermore, California · 8808 days ago · 0 km deep · 73 km away
  17. 1.614 km ESE of Livermore, California · 8808 days ago · 0 km deep · 73 km away
  18. 2.321 km NE of Soledad, California · 8807 days ago · 5 km deep · 64 km away
  19. 2.11 km SW of Campbell, California · 8807 days ago · 7 km deep · 46 km away
  20. 1.91 km SSE of Diablo, California · 8807 days ago · 15 km deep · 99 km away
  21. 2.621 km SSE of Tres Pinos, California · 8805 days ago · 6 km deep · 53 km away
  22. 2.92 km N of Castro Valley, California · 8805 days ago · 10 km deep · 93 km away
  23. 2.92 km N of Castro Valley, California · 8805 days ago · 10 km deep · 93 km away
  24. 1.618 km SSE of Tres Pinos, California · 8805 days ago · 3 km deep · 50 km away
  25. 2.210 km SSW of Tracy, California · 8804 days ago · 15 km deep · 77 km away
  26. 1.521 km SE of Big Sur, California · 8802 days ago · 7 km deep · 92 km away
  27. 2.44 km ESE of Aromas, California · 8802 days ago · 6 km deep · 11 km away
  28. 2.04 km ESE of Aromas, California · 8802 days ago · 6 km deep · 11 km away
  29. 1.623 km ENE of Soledad, California · 8801 days ago · 6 km deep · 72 km away
  30. 2.39 km SSW of Tracy, California · 8801 days ago · 14 km deep · 78 km away
  31. 2.09 km SSW of Tracy, California · 8801 days ago · 14 km deep · 78 km away
  32. 2.38 km S of Tracy, California · 8800 days ago · 14 km deep · 79 km away
  33. 2.624 km ENE of Greenfield, California · 8800 days ago · 6 km deep · 82 km away
  34. 1.9Northern California · 8800 days ago · 15 km deep · 78 km away
  35. 2.58 km SSW of Tracy, California · 8799 days ago · 14 km deep · 79 km away
  36. 2.98 km SSW of Tracy, California · 8799 days ago · 14 km deep · 79 km away
  37. 2.32 km SSW of San Juan Bautista, California · 8798 days ago · 6 km deep · 18 km away
  38. 1.90 km SW of Dublin, California · 8797 days ago · 10 km deep · 86 km away
  39. 1.51 km SSE of San Ramon, California · 8797 days ago · 10 km deep · 94 km away
  40. 2.78 km SSW of Tracy, California · 8797 days ago · 14 km deep · 79 km away
  41. 1.64 km ESE of Big Sur, California · 8796 days ago · 15 km deep · 80 km away
  42. 2.124 km NE of Greenfield, California · 8796 days ago · 5 km deep · 75 km away
  43. 1.624 km NE of Greenfield, California · 8796 days ago · 5 km deep · 75 km away
  44. 1.626 km NE of Soledad, California · 8796 days ago · 8 km deep · 65 km away
  45. 2.2Central California · 8795 days ago · 6 km deep · 43 km away
  46. 1.62 km ENE of San Leandro, California · 8795 days ago · 5 km deep · 97 km away
  47. 2.82 km SE of South Dos Palos, California · 8795 days ago · 10 km deep · 87 km away
  48. 2.48 km SSW of Tracy, California · 8795 days ago · 14 km deep · 79 km away
  49. 1.77 km SE of San Juan Bautista, California · 8794 days ago · 5 km deep · 23 km away
  50. 1.625 km NE of Soledad, California · 8794 days ago · 9 km deep · 63 km away
  51. 2.424 km NE of Soledad, California · 8793 days ago · 10 km deep · 65 km away
  52. 1.715 km SSE of Tres Pinos, California · 8793 days ago · 5 km deep · 47 km away
  53. 1.98 km NE of Milpitas, California · 8792 days ago · 14 km deep · 60 km away
  54. 2.28 km NE of San Juan Bautista, California · 8791 days ago · 5 km deep · 14 km away
  55. 2.16 km NNE of Milpitas, California · 8791 days ago · 1 km deep · 61 km away
  56. 2.125 km SSW of Los Banos, California · 8791 days ago · 0 km deep · 61 km away
  57. 2.57 km SSW of Tracy, California · 8790 days ago · 11 km deep · 80 km away
  58. 2.33 km NNE of Pleasanton, California · 8790 days ago · 15 km deep · 83 km away
  59. 1.89 km SSW of Tracy, California · 8790 days ago · 14 km deep · 78 km away
  60. 2.73 km NNE of Pleasanton, California · 8790 days ago · 14 km deep · 83 km away

The first 60 of 156.

Before

  1. 1.812 km ESE of East Foothills, California · 8812 days ago · 5 km deep · 40 km away
  2. 1.610 km S of Tres Pinos, California · 8812 days ago · 12 km deep · 41 km away
  3. 1.86 km SW of Tres Pinos, California · 8815 days ago · 6 km deep · 34 km away
  4. 2.318 km WSW of Volta, California · 8815 days ago · 3 km deep · 45 km away
  5. 1.62 km SW of San Juan Bautista, California · 8815 days ago · 8 km deep · 16 km away
  6. 1.63 km ESE of Tres Pinos, California · 8816 days ago · 9 km deep · 36 km away
  7. 1.511 km SSE of Livermore, California · 8816 days ago · 6 km deep · 70 km away
  8. 2.023 km NE of King City, California · 8817 days ago · 6 km deep · 87 km away
  9. 2.922 km NE of Soledad, California · 8818 days ago · 4 km deep · 57 km away
  10. 1.85 km NNE of Milpitas, California · 8819 days ago · 0 km deep · 60 km away
  11. 1.822 km NE of Soledad, California · 8821 days ago · 3 km deep · 58 km away
  12. 1.817 km SSE of Tres Pinos, California · 8821 days ago · 4 km deep · 49 km away
  13. 2.213 km S of Tres Pinos, California · 8822 days ago · 3 km deep · 44 km away
  14. 2.422 km NE of Soledad, California · 8824 days ago · 6 km deep · 57 km away
  15. 1.633 km W of Three Rocks, California · 8824 days ago · 8 km deep · 90 km away
  16. 1.93 km N of East Foothills, California · 8824 days ago · 1 km deep · 52 km away
  17. 1.624 km ENE of Soledad, California · 8825 days ago · 3 km deep · 72 km away
  18. 1.97 km E of East Foothills, California · 8825 days ago · 7 km deep · 46 km away
  19. 1.74 km S of Diablo Grande, California · 8826 days ago · 7 km deep · 53 km away
  20. 1.615 km E of Seven Trees, California · 8826 days ago · 2 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc21241432. Read Mon, Oct 5, 2026, 12:04 PM UTC.