California earthquakes

M1.9 earthquake 6 km NE of Ridgemark, California

A magnitude 1.9 earthquake struck 6 km NE of Ridgemark, California on Thu, Jul 24, 1986, 5:44 AM PDT (12:44 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.0 16 km E of Seven Trees, 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
1.9 (md), micro
Local time
UTC
1986-07-24 12:44:20 UTC
Depth
5.3 km (3.3 mi), shallow
Epicenter
36.849° N, 121.314° 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
±0.16
Depth from
From location
Station coverage gap
84°
Stations used
39

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 173 in the 60 days after this one and 146 in the 30 days before it.

After

  1. 2.16 km NE of Ridgemark, California · 14676 days ago · 5 km deep · 0 km away
  2. 2.321 km NE of Soledad, California · 14676 days ago · 9 km deep · 36 km away
  3. 1.521 km NNE of Soledad, California · 14675 days ago · 8 km deep · 31 km away
  4. 2.314 km E of Seven Trees, California · 14675 days ago · 3 km deep · 58 km away
  5. 2.515 km E of Seven Trees, California · 14675 days ago · 3 km deep · 58 km away
  6. 1.913 km S of Tres Pinos, California · 14675 days ago · 4 km deep · 20 km away
  7. 1.84 km SE of Tres Pinos, California · 14675 days ago · 7 km deep · 10 km away
  8. 1.813 km S of Tres Pinos, California · 14675 days ago · 4 km deep · 20 km away
  9. 2.46 km ENE of Hollister, California · 14675 days ago · 9 km deep · 4 km away
  10. 2.65 km WNW of San Juan Bautista, California · 14675 days ago · 7 km deep · 25 km away
  11. 2.019 km NE of East Foothills, California · 14675 days ago · 6 km deep · 80 km away
  12. 2.16 km ENE of Hollister, California · 14675 days ago · 9 km deep · 4 km away
  13. 2.84 km SW of Gonzales, California · 14675 days ago · 11 km deep · 44 km away
  14. 1.67 km NE of Ridgemark, California · 14675 days ago · 4 km deep · 2 km away
  15. 1.616 km ESE of Livermore, California · 14675 days ago · 14 km deep · 88 km away
  16. 2.85 km WNW of San Juan Bautista, California · 14675 days ago · 6 km deep · 25 km away
  17. 2.65 km WNW of San Juan Bautista, California · 14675 days ago · 7 km deep · 25 km away
  18. 1.66 km NE of Ridgemark, California · 14675 days ago · 5 km deep · 0 km away
  19. 3.318 km NE of East Foothills, California · 14674 days ago · 8 km deep · 81 km away
  20. 1.612 km ENE of East Foothills, California · 14674 days ago · 6 km deep · 73 km away
  21. 2.118 km NE of East Foothills, California · 14673 days ago · 7 km deep · 81 km away
  22. 3.018 km NE of East Foothills, California · 14673 days ago · 8 km deep · 81 km away
  23. 1.926 km W of Volta, California · 14673 days ago · 5 km deep · 25 km away
  24. 1.516 km SSE of Tres Pinos, California · 14673 days ago · 6 km deep · 22 km away
  25. 1.514 km SSE of Livermore, California · 14672 days ago · 2 km deep · 87 km away
  26. 1.85 km NNE of Tres Pinos, California · 14672 days ago · 4 km deep · 3 km away
  27. 1.715 km SSE of Tres Pinos, California · 14672 days ago · 5 km deep · 22 km away
  28. 2.218 km NE of East Foothills, California · 14672 days ago · 6 km deep · 81 km away
  29. 1.624 km SE of Tres Pinos, California · 14672 days ago · 5 km deep · 29 km away
  30. 1.712 km S of Tres Pinos, California · 14671 days ago · 3 km deep · 19 km away
  31. 2.211 km NNE of Morgan Hill, California · 14671 days ago · 5 km deep · 51 km away
  32. 2.424 km NE of Greenfield, California · 14671 days ago · 5 km deep · 52 km away
  33. 1.614 km N of Morgan Hill, California · 14671 days ago · 5 km deep · 54 km away
  34. 2.16 km NNE of Interlaken, California · 14670 days ago · 8 km deep · 39 km away
  35. 2.22 km SSE of Big Sur, California · 14670 days ago · 9 km deep · 79 km away
  36. 2.614 km ENE of Greenfield, California · 14670 days ago · 17 km deep · 57 km away
  37. 1.611 km S of Tres Pinos, California · 14670 days ago · 4 km deep · 18 km away
  38. 2.018 km NE of East Foothills, California · 14670 days ago · 6 km deep · 80 km away
  39. 1.618 km NE of East Foothills, California · 14669 days ago · 6 km deep · 81 km away
  40. 1.617 km SSE of Tres Pinos, California · 14669 days ago · 6 km deep · 24 km away
  41. 2.24 km N of East Foothills, California · 14669 days ago · 2 km deep · 77 km away
  42. 1.718 km SSE of Livermore, California · 14669 days ago · 8 km deep · 82 km away
  43. 1.98 km W of Diablo Grande, California · 14669 days ago · 3 km deep · 60 km away
  44. 1.717 km NE of East Foothills, California · 14669 days ago · 6 km deep · 80 km away
  45. 1.619 km SSE of Livermore, California · 14669 days ago · 6 km deep · 82 km away
  46. 1.712 km NE of East Foothills, California · 14668 days ago · 8 km deep · 78 km away
  47. 1.721 km NE of Soledad, California · 14668 days ago · 7 km deep · 36 km away
  48. 1.89 km SSW of Ridgemark, California · 14668 days ago · 6 km deep · 15 km away
  49. 2.69 km SSW of Ridgemark, California · 14668 days ago · 6 km deep · 15 km away
  50. 1.96 km S of Big Sur, California · 14667 days ago · 15 km deep · 83 km away
  51. 2.513 km ENE of East Foothills, California · 14667 days ago · 8 km deep · 72 km away
  52. 3.422 km NNE of Soledad, California · 14666 days ago · 6 km deep · 30 km away
  53. 1.622 km NNE of Soledad, California · 14666 days ago · 6 km deep · 30 km away
  54. 2.022 km NNE of Soledad, California · 14666 days ago · 5 km deep · 30 km away
  55. 2.322 km NNE of Soledad, California · 14666 days ago · 6 km deep · 30 km away
  56. 1.66 km WSW of Gilroy, California · 14666 days ago · 4 km deep · 32 km away
  57. 1.919 km NE of East Foothills, California · 14666 days ago · 6 km deep · 81 km away
  58. 2.422 km NNE of Soledad, California · 14666 days ago · 6 km deep · 29 km away
  59. 2.124 km NE of Greenfield, California · 14666 days ago · 0 km deep · 52 km away
  60. 1.524 km ENE of Greenfield, California · 14666 days ago · 4 km deep · 52 km away

The first 60 of 173.

Before

  1. 1.618 km NE of East Foothills, California · 14676 days ago · 7 km deep · 81 km away
  2. 2.610 km ESE of East Foothills, California · 14676 days ago · 8 km deep · 65 km away
  3. 1.916 km E of Seven Trees, California · 14677 days ago · 4 km deep · 60 km away
  4. 2.018 km NE of East Foothills, California · 14677 days ago · 7 km deep · 80 km away
  5. 2.014 km SW of Mendota, California · 14677 days ago · -1 km deep · 77 km away
  6. 1.918 km NE of East Foothills, California · 14677 days ago · 7 km deep · 81 km away
  7. 1.523 km ENE of Soledad, California · 14678 days ago · 4 km deep · 43 km away
  8. 1.810 km NNW of Hollister, California · 14678 days ago · 3 km deep · 16 km away
  9. 2.420 km S of Big Sur, California · 14678 days ago · 17 km deep · 97 km away
  10. 2.810 km NNW of Hollister, California · 14678 days ago · 2 km deep · 17 km away
  11. 1.618 km SSE of Tres Pinos, California · 14678 days ago · 6 km deep · 24 km away
  12. 1.612 km NE of East Foothills, California · 14679 days ago · 5 km deep · 78 km away
  13. 2.534 km SE of Big Sur, California · 14679 days ago · 17 km deep · 94 km away
  14. 2.121 km S of Big Sur, California · 14680 days ago · 17 km deep · 98 km away
  15. 1.66 km NNE of Tres Pinos, California · 14680 days ago · 6 km deep · 2 km away
  16. 3.15 km NNE of Tres Pinos, California · 14680 days ago · 8 km deep · 2 km away
  17. 2.05 km NNE of Tres Pinos, California · 14680 days ago · 4 km deep · 3 km away
  18. 1.623 km ENE of San Lucas, California · 14680 days ago · 6 km deep · 81 km away
  19. 1.74 km ESE of Tres Pinos, California · 14680 days ago · 8 km deep · 9 km away
  20. 1.63 km ESE of Tres Pinos, California · 14681 days ago · 7 km deep · 9 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc77071. Read Mon, Sep 28, 2026, 5:49 PM UTC.