California earthquakes

M2.1 earthquake 6 km NE of Ridgemark, California

A magnitude 2.1 earthquake struck 6 km NE of Ridgemark, California on Sat, May 3, 1986, 3:43 AM PDT (10:43 UTC), 5 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
2.1 (md), micro
Local time
UTC
1986-05-03 10:43:27 UTC
Depth
4.7 km (2.9 mi), shallow
Epicenter
36.852° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
44°
Stations used
60

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 180 in the 60 days after this one and 184 in the 30 days before it.

After

  1. 1.75 km E of Tres Pinos, California · 14759 days ago · 8 km deep · 9 km away
  2. 2.618 km NE of East Foothills, California · 14759 days ago · 7 km deep · 81 km away
  3. 2.718 km NE of East Foothills, California · 14759 days ago · 7 km deep · 81 km away
  4. 1.86 km NE of Ridgemark, California · 14758 days ago · 4 km deep · 0 km away
  5. 2.418 km NE of East Foothills, California · 14758 days ago · 7 km deep · 81 km away
  6. 1.724 km NE of Greenfield, California · 14758 days ago · 7 km deep · 47 km away
  7. 2.01 km E of San Ardo, California · 14758 days ago · 11 km deep · 100 km away
  8. 2.518 km NE of East Foothills, California · 14758 days ago · 8 km deep · 81 km away
  9. 1.818 km SSE of Livermore, California · 14757 days ago · 8 km deep · 82 km away
  10. 1.518 km SSE of Livermore, California · 14756 days ago · 8 km deep · 83 km away
  11. 2.06 km NE of Ridgemark, California · 14756 days ago · 4 km deep · 2 km away
  12. 1.56 km NE of Ridgemark, California · 14756 days ago · 4 km deep · 2 km away
  13. 1.521 km NE of Soledad, California · 14756 days ago · 7 km deep · 33 km away
  14. 1.812 km ENE of East Foothills, California · 14756 days ago · 7 km deep · 71 km away
  15. 1.922 km ENE of San Ardo, California · 14756 days ago · 3 km deep · 100 km away
  16. 1.523 km ENE of San Ardo, California · 14755 days ago · 2 km deep · 100 km away
  17. 1.54 km E of Tres Pinos, California · 14755 days ago · 8 km deep · 7 km away
  18. 1.95 km NNE of Tres Pinos, California · 14755 days ago · 4 km deep · 2 km away
  19. 1.922 km NE of Soledad, California · 14755 days ago · 3 km deep · 38 km away
  20. 1.69 km SE of Seven Trees, California · 14755 days ago · 6 km deep · 58 km away
  21. 1.917 km NE of East Foothills, California · 14755 days ago · 6 km deep · 80 km away
  22. 2.05 km NNE of Tres Pinos, California · 14755 days ago · 4 km deep · 1 km away
  23. 2.013 km ENE of East Foothills, California · 14755 days ago · 5 km deep · 74 km away
  24. 1.74 km SE of Tres Pinos, California · 14754 days ago · 7 km deep · 10 km away
  25. 2.310 km NW of Bonny Doon, California · 14754 days ago · 16 km deep · 88 km away
  26. 2.513 km ENE of East Foothills, California · 14754 days ago · 8 km deep · 74 km away
  27. 2.26 km ENE of Interlaken, California · 14754 days ago · 10 km deep · 36 km away
  28. 1.89 km NNE of East Foothills, California · 14754 days ago · 5 km deep · 79 km away
  29. 3.05 km ESE of Tres Pinos, California · 14754 days ago · 9 km deep · 10 km away
  30. 1.98 km ENE of Gilroy, California · 14754 days ago · 8 km deep · 26 km away
  31. 1.719 km SSE of Livermore, California · 14753 days ago · 7 km deep · 82 km away
  32. 1.78 km E of San Martin, California · 14753 days ago · 3 km deep · 33 km away
  33. 3.08 km NE of Ridgemark, California · 14753 days ago · 8 km deep · 3 km away
  34. 1.62 km W of San Juan Bautista, California · 14753 days ago · 5 km deep · 23 km away
  35. 1.59 km NNE of East Foothills, California · 14753 days ago · 5 km deep · 79 km away
  36. 2.119 km SSE of Livermore, California · 14753 days ago · 7 km deep · 81 km away
  37. 2.65 km SE of Tres Pinos, California · 14753 days ago · 9 km deep · 10 km away
  38. 1.817 km NE of East Foothills, California · 14753 days ago · 8 km deep · 80 km away
  39. 1.85 km ESE of Tres Pinos, California · 14752 days ago · 8 km deep · 10 km away
  40. 2.29 km NNE of East Foothills, California · 14752 days ago · 5 km deep · 79 km away
  41. 2.610 km NNE of East Foothills, California · 14752 days ago · 9 km deep · 80 km away
  42. 1.711 km ESE of East Foothills, California · 14752 days ago · 7 km deep · 64 km away
  43. 1.57 km NE of Ridgemark, California · 14752 days ago · 3 km deep · 2 km away
  44. 1.918 km NE of East Foothills, California · 14752 days ago · 5 km deep · 80 km away
  45. 2.48 km NE of Ridgemark, California · 14751 days ago · 6 km deep · 2 km away
  46. 1.812 km N of Morgan Hill, California · 14751 days ago · 3 km deep · 53 km away
  47. 2.117 km SSE of Tres Pinos, California · 14751 days ago · 5 km deep · 24 km away
  48. 1.617 km SSE of Tres Pinos, California · 14751 days ago · 5 km deep · 24 km away
  49. 2.05 km SE of Tres Pinos, California · 14751 days ago · 7 km deep · 10 km away
  50. 1.613 km N of Morgan Hill, California · 14751 days ago · 3 km deep · 53 km away
  51. 2.69 km NNE of East Foothills, California · 14750 days ago · 5 km deep · 78 km away
  52. 1.94 km NE of Interlaken, California · 14750 days ago · 10 km deep · 38 km away
  53. 2.318 km NE of East Foothills, California · 14750 days ago · 8 km deep · 80 km away
  54. 3.114 km NE of East Foothills, California · 14750 days ago · 7 km deep · 75 km away
  55. 1.818 km NE of East Foothills, California · 14749 days ago · 7 km deep · 81 km away
  56. 1.613 km ENE of East Foothills, California · 14749 days ago · 7 km deep · 74 km away
  57. 3.26 km NNE of Tres Pinos, California · 14749 days ago · 6 km deep · 1 km away
  58. 1.813 km ENE of East Foothills, California · 14749 days ago · 7 km deep · 73 km away
  59. 1.717 km NE of East Foothills, California · 14749 days ago · 6 km deep · 80 km away
  60. 1.711 km ENE of East Foothills, California · 14749 days ago · 7 km deep · 71 km away

The first 60 of 180.

Before

  1. 1.66 km NNE of Tres Pinos, California · 14759 days ago · 3 km deep · 1 km away
  2. 1.918 km NE of East Foothills, California · 14759 days ago · 12 km deep · 81 km away
  3. 1.713 km ENE of Gilroy, California · 14759 days ago · 18 km deep · 23 km away
  4. 1.67 km SE of La Honda, California · 14759 days ago · 5 km deep · 93 km away
  5. 1.531 km ENE of Soledad, California · 14759 days ago · 7 km deep · 40 km away
  6. 2.618 km NE of East Foothills, California · 14759 days ago · 7 km deep · 80 km away
  7. 1.812 km N of Morgan Hill, California · 14760 days ago · 6 km deep · 52 km away
  8. 2.3Central California · 14760 days ago · 7 km deep · 2 km away
  9. 1.813 km NE of East Foothills, California · 14760 days ago · 8 km deep · 75 km away
  10. 1.84 km SE of Tres Pinos, California · 14760 days ago · 7 km deep · 10 km away
  11. 1.73 km N of East Foothills, California · 14760 days ago · 3 km deep · 77 km away
  12. 2.26 km NE of Ridgemark, California · 14761 days ago · 4 km deep · 0 km away
  13. 2.46 km NE of Ridgemark, California · 14761 days ago · 4 km deep · 0 km away
  14. 1.711 km NE of East Foothills, California · 14761 days ago · 3 km deep · 77 km away
  15. 2.725 km ENE of East Foothills, California · 14761 days ago · 7 km deep · 76 km away
  16. 1.918 km NE of East Foothills, California · 14762 days ago · 8 km deep · 81 km away
  17. 2.318 km NE of East Foothills, California · 14762 days ago · 7 km deep · 81 km away
  18. 2.45 km NNE of Tres Pinos, California · 14762 days ago · 7 km deep · 3 km away
  19. 1.921 km NE of Soledad, California · 14762 days ago · 2 km deep · 34 km away
  20. 2.05 km ENE of Tres Pinos, California · 14762 days ago · 8 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc71816. Read Tue, Sep 29, 2026, 7:17 AM UTC.