California earthquakes

M2.5 earthquake 10 km SW of Ridgemark, California

A magnitude 2.5 earthquake struck 10 km SW of Ridgemark, California on Fri, Jul 3, 1987, 9:29 PM PDT (04:29 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.8 18 km SW of Gustine, 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
2.5 (md), micro
Local time
UTC
1987-07-04 04:29:14 UTC
Depth
7.4 km (4.6 mi), shallow
Epicenter
36.750° N, 121.447° 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
29°
Stations used
59

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 133 in the 60 days after this one and 54 in the 30 days before it.

After

  1. 1.67 km ENE of Hollister, California · 14333 days ago · 4 km deep · 18 km away
  2. 2.05 km SE of Tres Pinos, California · 14333 days ago · 6 km deep · 15 km away
  3. 1.623 km NE of King City, California · 14333 days ago · 5 km deep · 58 km away
  4. 1.55 km SE of Tres Pinos, California · 14332 days ago · 7 km deep · 15 km away
  5. 1.627 km NE of Soledad, California · 14332 days ago · 9 km deep · 39 km away
  6. 1.622 km SE of Big Sur, California · 14332 days ago · 13 km deep · 68 km away
  7. 1.613 km N of Morgan Hill, California · 14331 days ago · 6 km deep · 59 km away
  8. 1.514 km NNE of Morgan Hill, California · 14331 days ago · 3 km deep · 57 km away
  9. 2.023 km NE of King City, California · 14331 days ago · 4 km deep · 63 km away
  10. 1.99 km E of San Martin, California · 14331 days ago · 8 km deep · 38 km away
  11. 2.614 km NNW of Big Sur, California · 14331 days ago · 9 km deep · 57 km away
  12. 1.616 km NW of Big Sur, California · 14331 days ago · 10 km deep · 57 km away
  13. 2.113 km N of Morgan Hill, California · 14331 days ago · 5 km deep · 59 km away
  14. 1.54 km NE of Tres Pinos, California · 14330 days ago · 9 km deep · 16 km away
  15. 3.613 km N of Morgan Hill, California · 14330 days ago · 6 km deep · 59 km away
  16. 1.612 km N of Morgan Hill, California · 14330 days ago · 7 km deep · 57 km away
  17. 1.67 km ENE of Gilroy, California · 14329 days ago · 6 km deep · 33 km away
  18. 1.95 km SW of Gilroy, California · 14329 days ago · 7 km deep · 28 km away
  19. 2.013 km N of Morgan Hill, California · 14329 days ago · 5 km deep · 59 km away
  20. 1.615 km SSE of Livermore, California · 14329 days ago · 3 km deep · 92 km away
  21. 2.515 km SSE of Livermore, California · 14328 days ago · 2 km deep · 92 km away
  22. 1.715 km SSE of Livermore, California · 14328 days ago · 2 km deep · 92 km away
  23. 2.115 km SSE of Livermore, California · 14328 days ago · 2 km deep · 92 km away
  24. 1.88 km NE of San Juan Bautista, California · 14328 days ago · 8 km deep · 17 km away
  25. 1.922 km NE of San Lucas, California · 14327 days ago · 7 km deep · 75 km away
  26. 1.522 km NE of Soledad, California · 14326 days ago · 2 km deep · 38 km away
  27. 2.221 km SSE of Tres Pinos, California · 14326 days ago · 4 km deep · 25 km away
  28. 2.412 km ESE of East Foothills, California · 14326 days ago · 6 km deep · 68 km away
  29. 1.519 km SSE of Livermore, California · 14326 days ago · 3 km deep · 89 km away
  30. 1.924 km ENE of Greenfield, California · 14325 days ago · 5 km deep · 52 km away
  31. 1.923 km ENE of Soledad, California · 14325 days ago · 5 km deep · 44 km away
  32. 1.65 km SW of Ridgemark, California · 14325 days ago · 11 km deep · 4 km away
  33. 1.724 km NE of Greenfield, California · 14324 days ago · 0 km deep · 51 km away
  34. 2.917 km NW of Diablo Grande, California · 14323 days ago · 5 km deep · 86 km away
  35. 1.814 km E of Seven Trees, California · 14323 days ago · 3 km deep · 63 km away
  36. 1.814 km N of Morgan Hill, California · 14322 days ago · 6 km deep · 59 km away
  37. 1.716 km NE of Gonzales, California · 14321 days ago · 11 km deep · 22 km away
  38. 1.59 km NE of Gilroy, California · 14321 days ago · 8 km deep · 34 km away
  39. 2.49 km NE of San Martin, California · 14320 days ago · 7 km deep · 45 km away
  40. 2.58 km NE of Morgan Hill, California · 14319 days ago · 3 km deep · 49 km away
  41. 1.73 km N of Interlaken, California · 14319 days ago · 13 km deep · 36 km away
  42. 1.78 km NE of Morgan Hill, California · 14319 days ago · 3 km deep · 49 km away
  43. 1.812 km N of Morgan Hill, California · 14319 days ago · 4 km deep · 58 km away
  44. 1.914 km NE of East Foothills, California · 14319 days ago · 9 km deep · 81 km away
  45. 2.521 km NE of Soledad, California · 14318 days ago · 7 km deep · 29 km away
  46. 2.121 km NE of Soledad, California · 14318 days ago · 6 km deep · 29 km away
  47. 2.07 km E of East Foothills, California · 14318 days ago · 7 km deep · 75 km away
  48. 1.924 km ENE of Soledad, California · 14316 days ago · 2 km deep · 44 km away
  49. 1.715 km SSE of Livermore, California · 14315 days ago · 3 km deep · 92 km away
  50. 1.930 km WSW of Lockwood, California · 14314 days ago · 12 km deep · 97 km away
  51. 1.621 km NE of Soledad, California · 14314 days ago · 3 km deep · 34 km away
  52. 1.724 km NE of King City, California · 14314 days ago · 5 km deep · 64 km away
  53. 1.59 km ESE of Seven Trees, California · 14314 days ago · 4 km deep · 61 km away
  54. 2.415 km SSE of Livermore, California · 14313 days ago · 2 km deep · 92 km away
  55. 2.518 km NE of East Foothills, California · 14313 days ago · 5 km deep · 87 km away
  56. 2.615 km SSE of Livermore, California · 14313 days ago · 2 km deep · 92 km away
  57. 1.98 km ENE of Milpitas, California · 14312 days ago · 5 km deep · 87 km away
  58. 1.64 km ESE of Tres Pinos, California · 14312 days ago · 6 km deep · 15 km away
  59. 1.69 km NNE of Lockwood, California · 14311 days ago · 11 km deep · 89 km away
  60. 1.518 km NE of East Foothills, California · 14310 days ago · 6 km deep · 87 km away

The first 60 of 133.

Before

  1. 3.120 km SSE of Tres Pinos, California · 14335 days ago · 5 km deep · 25 km away
  2. 1.624 km NNE of King City, California · 14335 days ago · 5 km deep · 56 km away
  3. 1.521 km NE of Soledad, California · 14335 days ago · 3 km deep · 32 km away
  4. 1.72 km ENE of San Ardo, California · 14335 days ago · 10 km deep · 95 km away
  5. 1.819 km SSE of Tres Pinos, California · 14336 days ago · 9 km deep · 23 km away
  6. 1.65 km NNE of Tres Pinos, California · 14338 days ago · 6 km deep · 17 km away
  7. 1.812 km NNE of East Foothills, California · 14339 days ago · 4 km deep · 85 km away
  8. 1.85 km NNE of Tres Pinos, California · 14340 days ago · 6 km deep · 17 km away
  9. 2.518 km SE of Tres Pinos, California · 14340 days ago · 7 km deep · 27 km away
  10. 1.813 km ENE of East Foothills, California · 14341 days ago · 7 km deep · 76 km away
  11. 2.327 km E of Tres Pinos, California · 14341 days ago · 5 km deep · 39 km away
  12. 2.68 km ENE of Morgan Hill, California · 14341 days ago · 3 km deep · 47 km away
  13. 1.722 km NNE of Soledad, California · 14341 days ago · 4 km deep · 29 km away
  14. 1.823 km ESE of Big Sur, California · 14342 days ago · 13 km deep · 68 km away
  15. 1.619 km SSE of Livermore, California · 14342 days ago · 3 km deep · 89 km away
  16. 2.021 km NE of Soledad, California · 14343 days ago · 3 km deep · 33 km away
  17. 2.36 km NE of East Foothills, California · 14343 days ago · 10 km deep · 80 km away
  18. 1.65 km NNE of Tres Pinos, California · 14343 days ago · 4 km deep · 16 km away
  19. 2.128 km NW of Coalinga, California · 14344 days ago · 14 km deep · 90 km away
  20. 1.914 km E of Seven Trees, California · 14344 days ago · 1 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc102743. Read Wed, Sep 30, 2026, 11:55 AM UTC.