California earthquakes

M2.4 earthquake 6 km NE of Ridgemark, California

A magnitude 2.4 earthquake struck 6 km NE of Ridgemark, California on Thu, May 1, 1986, 12:17 AM PDT (07:17 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.7 18 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
2.4 (md), micro
Local time
UTC
1986-05-01 07:17:38 UTC
Depth
4.2 km (2.6 mi), shallow
Epicenter
36.851° N, 121.305° 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, 0.4 km in depth
Magnitude uncertainty
±0.31
Depth from
From location
Station coverage gap
100°
Stations used
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 177 in the 60 days after this one and 186 in the 30 days before it.

After

  1. 2.26 km NE of Ridgemark, California · 14763 days ago · 4 km deep · 0 km away
  2. 1.73 km N of East Foothills, California · 14762 days ago · 3 km deep · 77 km away
  3. 1.84 km SE of Tres Pinos, California · 14762 days ago · 7 km deep · 10 km away
  4. 1.813 km NE of East Foothills, California · 14762 days ago · 8 km deep · 75 km away
  5. 2.3Central California · 14761 days ago · 7 km deep · 2 km away
  6. 1.812 km N of Morgan Hill, California · 14761 days ago · 6 km deep · 52 km away
  7. 2.618 km NE of East Foothills, California · 14761 days ago · 7 km deep · 80 km away
  8. 1.531 km ENE of Soledad, California · 14761 days ago · 7 km deep · 40 km away
  9. 1.67 km SE of La Honda, California · 14761 days ago · 5 km deep · 93 km away
  10. 1.713 km ENE of Gilroy, California · 14761 days ago · 18 km deep · 23 km away
  11. 1.918 km NE of East Foothills, California · 14760 days ago · 12 km deep · 81 km away
  12. 1.66 km NNE of Tres Pinos, California · 14760 days ago · 3 km deep · 1 km away
  13. 2.16 km NE of Ridgemark, California · 14760 days ago · 5 km deep · 0 km away
  14. 1.75 km E of Tres Pinos, California · 14760 days ago · 8 km deep · 8 km away
  15. 2.618 km NE of East Foothills, California · 14760 days ago · 7 km deep · 81 km away
  16. 2.718 km NE of East Foothills, California · 14760 days ago · 7 km deep · 81 km away
  17. 1.86 km NE of Ridgemark, California · 14760 days ago · 4 km deep · 0 km away
  18. 2.418 km NE of East Foothills, California · 14760 days ago · 7 km deep · 81 km away
  19. 1.724 km NE of Greenfield, California · 14760 days ago · 7 km deep · 47 km away
  20. 2.01 km E of San Ardo, California · 14760 days ago · 11 km deep · 100 km away
  21. 2.518 km NE of East Foothills, California · 14759 days ago · 8 km deep · 81 km away
  22. 1.818 km SSE of Livermore, California · 14759 days ago · 8 km deep · 82 km away
  23. 1.518 km SSE of Livermore, California · 14758 days ago · 8 km deep · 83 km away
  24. 2.06 km NE of Ridgemark, California · 14758 days ago · 4 km deep · 2 km away
  25. 1.56 km NE of Ridgemark, California · 14758 days ago · 4 km deep · 2 km away
  26. 1.521 km NE of Soledad, California · 14758 days ago · 7 km deep · 33 km away
  27. 1.812 km ENE of East Foothills, California · 14758 days ago · 7 km deep · 71 km away
  28. 1.922 km ENE of San Ardo, California · 14757 days ago · 3 km deep · 100 km away
  29. 1.523 km ENE of San Ardo, California · 14757 days ago · 2 km deep · 100 km away
  30. 1.54 km E of Tres Pinos, California · 14757 days ago · 8 km deep · 7 km away
  31. 1.95 km NNE of Tres Pinos, California · 14757 days ago · 4 km deep · 1 km away
  32. 1.922 km NE of Soledad, California · 14757 days ago · 3 km deep · 38 km away
  33. 1.69 km SE of Seven Trees, California · 14757 days ago · 6 km deep · 58 km away
  34. 1.917 km NE of East Foothills, California · 14756 days ago · 6 km deep · 80 km away
  35. 2.05 km NNE of Tres Pinos, California · 14756 days ago · 4 km deep · 1 km away
  36. 2.013 km ENE of East Foothills, California · 14756 days ago · 5 km deep · 74 km away
  37. 1.74 km SE of Tres Pinos, California · 14756 days ago · 7 km deep · 10 km away
  38. 2.310 km NW of Bonny Doon, California · 14756 days ago · 16 km deep · 88 km away
  39. 2.513 km ENE of East Foothills, California · 14756 days ago · 8 km deep · 74 km away
  40. 2.26 km ENE of Interlaken, California · 14756 days ago · 10 km deep · 36 km away
  41. 1.89 km NNE of East Foothills, California · 14755 days ago · 5 km deep · 79 km away
  42. 3.05 km ESE of Tres Pinos, California · 14755 days ago · 9 km deep · 10 km away
  43. 1.98 km ENE of Gilroy, California · 14755 days ago · 8 km deep · 26 km away
  44. 1.719 km SSE of Livermore, California · 14755 days ago · 7 km deep · 82 km away
  45. 1.78 km E of San Martin, California · 14755 days ago · 3 km deep · 33 km away
  46. 3.08 km NE of Ridgemark, California · 14755 days ago · 8 km deep · 3 km away
  47. 1.62 km W of San Juan Bautista, California · 14755 days ago · 5 km deep · 23 km away
  48. 1.59 km NNE of East Foothills, California · 14755 days ago · 5 km deep · 79 km away
  49. 2.119 km SSE of Livermore, California · 14755 days ago · 7 km deep · 82 km away
  50. 2.65 km SE of Tres Pinos, California · 14754 days ago · 9 km deep · 10 km away
  51. 1.817 km NE of East Foothills, California · 14754 days ago · 8 km deep · 81 km away
  52. 1.85 km ESE of Tres Pinos, California · 14754 days ago · 8 km deep · 10 km away
  53. 2.29 km NNE of East Foothills, California · 14754 days ago · 5 km deep · 79 km away
  54. 2.610 km NNE of East Foothills, California · 14754 days ago · 9 km deep · 80 km away
  55. 1.711 km ESE of East Foothills, California · 14754 days ago · 7 km deep · 64 km away
  56. 1.57 km NE of Ridgemark, California · 14753 days ago · 3 km deep · 2 km away
  57. 1.918 km NE of East Foothills, California · 14753 days ago · 5 km deep · 80 km away
  58. 2.48 km NE of Ridgemark, California · 14753 days ago · 6 km deep · 2 km away
  59. 1.812 km N of Morgan Hill, California · 14753 days ago · 3 km deep · 53 km away
  60. 2.117 km SSE of Tres Pinos, California · 14753 days ago · 5 km deep · 24 km away

The first 60 of 177.

Before

  1. 1.711 km NE of East Foothills, California · 14763 days ago · 3 km deep · 77 km away
  2. 2.725 km ENE of East Foothills, California · 14763 days ago · 7 km deep · 76 km away
  3. 1.918 km NE of East Foothills, California · 14763 days ago · 8 km deep · 81 km away
  4. 2.318 km NE of East Foothills, California · 14763 days ago · 7 km deep · 81 km away
  5. 2.45 km NNE of Tres Pinos, California · 14763 days ago · 7 km deep · 3 km away
  6. 1.921 km NE of Soledad, California · 14763 days ago · 2 km deep · 34 km away
  7. 2.05 km ENE of Tres Pinos, California · 14764 days ago · 8 km deep · 6 km away
  8. 1.623 km ENE of Soledad, California · 14764 days ago · 6 km deep · 45 km away
  9. 1.82 km SSE of Sunol, California · 14764 days ago · 12 km deep · 95 km away
  10. 1.510 km S of Tres Pinos, California · 14764 days ago · 4 km deep · 17 km away
  11. 1.67 km NE of Ridgemark, CA · 14764 days ago · 4 km deep · 0 km away
  12. 2.45 km ENE of Tres Pinos, California · 14765 days ago · 8 km deep · 6 km away
  13. 1.918 km NE of East Foothills, California · 14765 days ago · 6 km deep · 80 km away
  14. 1.75 km ENE of Tres Pinos, California · 14765 days ago · 8 km deep · 6 km away
  15. 1.75 km ENE of Tres Pinos, California · 14765 days ago · 8 km deep · 6 km away
  16. 2.129 km E of Tres Pinos, California · 14765 days ago · 1 km deep · 30 km away
  17. 1.81 km ENE of Del Monte Forest, California · 14765 days ago · 5 km deep · 63 km away
  18. 1.618 km NE of East Foothills, California · 14765 days ago · 8 km deep · 80 km away
  19. 3.65 km ENE of Tres Pinos, California · 14765 days ago · 8 km deep · 6 km away
  20. 3.515 km NE of East Foothills, California · 14765 days ago · 8 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc71590. Read Wed, Sep 30, 2026, 7:05 PM UTC.