California earthquakes

M1.7 earthquake 6 km NE of Ridgemark, California

A magnitude 1.7 earthquake struck 6 km NE of Ridgemark, California on Thu, Nov 6, 1986, 4:29 AM PST (12:29 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.1 21 km SSE of Tres Pinos, California. This one was a foreshock.

Ridgemark 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), micro
Local time
UTC
1986-11-06 12:29:20 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
36.858° N, 121.318° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
57°
Stations used
40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 169 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 3.121 km SSE of Tres Pinos, California · 14547 days ago · 6 km deep · 29 km away
  2. 1.812 km ENE of East Foothills, California · 14547 days ago · 8 km deep · 72 km away
  3. 2.324 km NE of Greenfield, California · 14547 days ago · 5 km deep · 51 km away
  4. 1.618 km NE of East Foothills, California · 14546 days ago · 6 km deep · 80 km away
  5. 1.97 km SSW of Ridgemark, California · 14546 days ago · 1 km deep · 14 km away
  6. 1.55 km ENE of Hollister, California · 14545 days ago · 6 km deep · 3 km away
  7. 1.616 km SSE of Livermore, California · 14545 days ago · 3 km deep · 83 km away
  8. 1.622 km NE of San Ardo, California · 14545 days ago · 4 km deep · 95 km away
  9. 2.216 km SSE of Tres Pinos, California · 14545 days ago · 9 km deep · 24 km away
  10. 1.725 km NE of Soledad, California · 14544 days ago · 9 km deep · 37 km away
  11. 2.012 km NE of East Foothills, California · 14544 days ago · 7 km deep · 77 km away
  12. 1.95 km ESE of Aromas, California · 14544 days ago · 6 km deep · 25 km away
  13. 2.516 km N of Morgan Hill, California · 14543 days ago · 6 km deep · 55 km away
  14. 1.516 km SSE of Livermore, California · 14542 days ago · 2 km deep · 84 km away
  15. 1.52 km SSW of La Honda, California · 14542 days ago · 6 km deep · 99 km away
  16. 2.25 km ENE of Hollister, California · 14541 days ago · 6 km deep · 3 km away
  17. 1.621 km NE of Soledad, California · 14541 days ago · 7 km deep · 33 km away
  18. 1.84 km NE of Tres Pinos, California · 14540 days ago · 8 km deep · 5 km away
  19. 1.73 km NNW of Hollister, California · 14539 days ago · 7 km deep · 9 km away
  20. 2.45 km NNE of Tres Pinos, California · 14539 days ago · 4 km deep · 2 km away
  21. 2.112 km ESE of East Foothills, California · 14539 days ago · 7 km deep · 61 km away
  22. 2.214 km N of Morgan Hill, California · 14539 days ago · 5 km deep · 54 km away
  23. 1.722 km ENE of Soledad, California · 14539 days ago · 2 km deep · 40 km away
  24. 1.522 km ENE of Soledad, California · 14538 days ago · 3 km deep · 40 km away
  25. 1.922 km SSE of Tres Pinos, California · 14538 days ago · 7 km deep · 29 km away
  26. 2.415 km N of Morgan Hill, California · 14538 days ago · 6 km deep · 54 km away
  27. 1.624 km NE of Greenfield, California · 14537 days ago · 5 km deep · 50 km away
  28. 2.015 km N of Morgan Hill, California · 14537 days ago · 7 km deep · 54 km away
  29. 1.87 km SW of Ridgemark, California · 14537 days ago · 1 km deep · 14 km away
  30. 1.75 km NNE of Tres Pinos, California · 14536 days ago · 6 km deep · 3 km away
  31. 1.513 km N of Morgan Hill, California · 14536 days ago · 3 km deep · 52 km away
  32. 2.2Northern California · 14536 days ago · 7 km deep · 73 km away
  33. 2.115 km N of Morgan Hill, California · 14535 days ago · 6 km deep · 54 km away
  34. 1.88 km ENE of Tres Pinos, California · 14535 days ago · 8 km deep · 10 km away
  35. 1.79 km NE of San Martin, California · 14535 days ago · 8 km deep · 38 km away
  36. 1.66 km SSW of Tres Pinos, California · 14534 days ago · 4 km deep · 14 km away
  37. 2.325 km NE of Soledad, California · 14534 days ago · 8 km deep · 34 km away
  38. 2.132 km ENE of Soledad, California · 14534 days ago · 7 km deep · 44 km away
  39. 2.124 km NE of Greenfield, California · 14534 days ago · 5 km deep · 50 km away
  40. 2.07 km NNE of Tres Pinos, California · 14534 days ago · 8 km deep · 2 km away
  41. 1.59 km ESE of Tres Pinos, California · 14533 days ago · 0 km deep · 14 km away
  42. 2.08 km ENE of Hollister, California · 14533 days ago · 6 km deep · 3 km away
  43. 1.83 km N of East Foothills, California · 14532 days ago · 0 km deep · 76 km away
  44. 2.112 km NNW of Big Sur, California · 14532 days ago · 4 km deep · 73 km away
  45. 2.824 km NE of Greenfield, California · 14532 days ago · 7 km deep · 50 km away
  46. 2.613 km NE of East Foothills, California · 14531 days ago · 9 km deep · 77 km away
  47. 1.81 km ESE of Davenport, California · 14531 days ago · 4 km deep · 78 km away
  48. 1.624 km NE of Greenfield, California · 14531 days ago · 5 km deep · 51 km away
  49. 1.716 km SSE of Livermore, California · 14531 days ago · 2 km deep · 84 km away
  50. 2.024 km NE of Greenfield, California · 14531 days ago · 5 km deep · 51 km away
  51. 1.69 km NNE of Hollister, California · 14530 days ago · 7 km deep · 8 km away
  52. 3.016 km SSE of Livermore, California · 14530 days ago · 2 km deep · 84 km away
  53. 1.726 km W of Volta, California · 14530 days ago · 4 km deep · 26 km away
  54. 2.218 km NE of East Foothills, California · 14530 days ago · 6 km deep · 80 km away
  55. 1.924 km NE of Greenfield, California · 14530 days ago · 5 km deep · 51 km away
  56. 2.05 km SW of Gilroy, California · 14530 days ago · 4 km deep · 28 km away
  57. 4.116 km SSE of Livermore, California · 14530 days ago · 2 km deep · 84 km away
  58. 1.916 km SE of Livermore, California · 14530 days ago · 2 km deep · 84 km away
  59. 1.816 km SSE of Livermore, California · 14530 days ago · 3 km deep · 84 km away
  60. 2.016 km SSE of Livermore, California · 14530 days ago · 3 km deep · 84 km away

The first 60 of 169.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc87360. Read Tue, Sep 22, 2026, 9:11 AM UTC.