California earthquakes

M3.0 earthquake 10 km WSW of Ridgemark, California

A magnitude 3.0 earthquake struck 10 km WSW of Ridgemark, California on Tue, Apr 22, 1986, 9:47 AM PST (17:47 UTC), 6 km (4 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
3.0 (ml), minor
Local time
UTC
1986-04-22 17:47:50 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
36.764° N, 121.462° 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
Depth from
From location
Station coverage gap
45°
Stations used
72

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 189 in the 30 days before it.

After

  1. 1.618 km NE of East Foothills, California · 14769 days ago · 7 km deep · 86 km away
  2. 1.99 km S of Tres Pinos, California · 14769 days ago · 4 km deep · 13 km away
  3. 1.710 km S of Tres Pinos, California · 14769 days ago · 4 km deep · 13 km away
  4. 2.417 km NE of East Foothills, California · 14769 days ago · 7 km deep · 85 km away
  5. 1.816 km NE of East Foothills, California · 14769 days ago · 12 km deep · 83 km away
  6. 1.713 km NE of East Foothills, California · 14769 days ago · 9 km deep · 79 km away
  7. 2.44 km N of East Foothills, California · 14768 days ago · 3 km deep · 79 km away
  8. 2.74 km N of East Foothills, California · 14768 days ago · 2 km deep · 79 km away
  9. 2.42 km E of San Ardo, California · 14768 days ago · 11 km deep · 98 km away
  10. 1.613 km ENE of East Foothills, California · 14768 days ago · 6 km deep · 78 km away
  11. 1.79 km NNW of Hollister, California · 14768 days ago · 2 km deep · 19 km away
  12. 2.417 km NE of East Foothills, California · 14768 days ago · 8 km deep · 85 km away
  13. 2.05 km NE of Tres Pinos, California · 14768 days ago · 9 km deep · 18 km away
  14. 1.918 km NE of East Foothills, California · 14767 days ago · 5 km deep · 85 km away
  15. 1.75 km SE of Tres Pinos, California · 14767 days ago · 7 km deep · 17 km away
  16. 1.810 km S of Tres Pinos, California · 14766 days ago · 4 km deep · 13 km away
  17. 2.513 km ENE of East Foothills, California · 14766 days ago · 7 km deep · 79 km away
  18. 1.613 km ENE of East Foothills, California · 14766 days ago · 5 km deep · 74 km away
  19. 2.06 km ENE of Interlaken, California · 14766 days ago · 10 km deep · 30 km away
  20. 1.819 km NE of Morgan Hill, California · 14766 days ago · 0 km deep · 53 km away
  21. 2.512 km ENE of East Foothills, California · 14766 days ago · 7 km deep · 77 km away
  22. 1.617 km NE of East Foothills, California · 14765 days ago · 3 km deep · 82 km away
  23. 2.716 km SSE of Tres Pinos, California · 14765 days ago · 7 km deep · 22 km away
  24. 1.86 km ENE of Interlaken, California · 14765 days ago · 11 km deep · 29 km away
  25. 2.07 km ESE of Lexington Hills, California · 14764 days ago · 17 km deep · 56 km away
  26. 1.515 km NE of Hollister, California · 14764 days ago · 11 km deep · 26 km away
  27. 1.612 km N of Morgan Hill, California · 14764 days ago · 6 km deep · 56 km away
  28. 2.318 km SSE of Livermore, California · 14764 days ago · 8 km deep · 87 km away
  29. 1.519 km SSE of Livermore, California · 14764 days ago · 7 km deep · 87 km away
  30. 2.24 km SE of Tres Pinos, California · 14764 days ago · 6 km deep · 16 km away
  31. 1.74 km SE of Tres Pinos, California · 14764 days ago · 6 km deep · 16 km away
  32. 2.32 km E of San Ardo, California · 14763 days ago · 12 km deep · 98 km away
  33. 3.515 km NE of East Foothills, California · 14763 days ago · 8 km deep · 81 km away
  34. 3.65 km ENE of Tres Pinos, California · 14763 days ago · 8 km deep · 18 km away
  35. 1.618 km NE of East Foothills, California · 14763 days ago · 8 km deep · 85 km away
  36. 1.81 km ENE of Del Monte Forest, California · 14763 days ago · 5 km deep · 46 km away
  37. 2.129 km E of Tres Pinos, California · 14763 days ago · 1 km deep · 42 km away
  38. 1.75 km ENE of Tres Pinos, California · 14763 days ago · 8 km deep · 18 km away
  39. 1.75 km ENE of Tres Pinos, California · 14763 days ago · 8 km deep · 18 km away
  40. 1.918 km NE of East Foothills, California · 14763 days ago · 6 km deep · 85 km away
  41. 2.45 km ENE of Tres Pinos, California · 14763 days ago · 8 km deep · 18 km away
  42. 1.67 km NE of Ridgemark, CA · 14763 days ago · 4 km deep · 17 km away
  43. 1.510 km S of Tres Pinos, California · 14762 days ago · 4 km deep · 14 km away
  44. 1.82 km SSE of Sunol, California · 14762 days ago · 12 km deep · 97 km away
  45. 1.623 km ENE of Soledad, California · 14762 days ago · 6 km deep · 46 km away
  46. 2.05 km ENE of Tres Pinos, California · 14762 days ago · 8 km deep · 18 km away
  47. 1.921 km NE of Soledad, California · 14762 days ago · 2 km deep · 35 km away
  48. 2.45 km NNE of Tres Pinos, California · 14761 days ago · 7 km deep · 17 km away
  49. 2.318 km NE of East Foothills, California · 14761 days ago · 7 km deep · 86 km away
  50. 1.918 km NE of East Foothills, California · 14761 days ago · 8 km deep · 86 km away
  51. 2.725 km ENE of East Foothills, California · 14761 days ago · 7 km deep · 83 km away
  52. 1.711 km NE of East Foothills, California · 14761 days ago · 3 km deep · 80 km away
  53. 2.46 km NE of Ridgemark, California · 14761 days ago · 4 km deep · 17 km away
  54. 2.26 km NE of Ridgemark, California · 14761 days ago · 4 km deep · 17 km away
  55. 1.73 km N of East Foothills, California · 14760 days ago · 3 km deep · 79 km away
  56. 1.84 km SE of Tres Pinos, California · 14760 days ago · 7 km deep · 16 km away
  57. 1.813 km NE of East Foothills, California · 14760 days ago · 8 km deep · 79 km away
  58. 2.3Central California · 14760 days ago · 7 km deep · 17 km away
  59. 1.812 km N of Morgan Hill, California · 14759 days ago · 6 km deep · 55 km away
  60. 2.618 km NE of East Foothills, California · 14759 days ago · 7 km deep · 85 km away

The first 60 of 178.

Before

  1. 1.916 km NE of East Foothills, California · 14770 days ago · 1 km deep · 82 km away
  2. 1.94 km WNW of San Juan Bautista, California · 14770 days ago · 5 km deep · 15 km away
  3. 1.918 km NE of East Foothills, California · 14770 days ago · 7 km deep · 86 km away
  4. 2.224 km NE of Greenfield, California · 14770 days ago · 7 km deep · 50 km away
  5. 1.818 km NE of East Foothills, California · 14770 days ago · 10 km deep · 82 km away
  6. 2.18 km SSW of Tres Pinos, California · 14770 days ago · 3 km deep · 10 km away
  7. 1.56 km NE of Ridgemark, California · 14770 days ago · 6 km deep · 16 km away
  8. 1.723 km W of Three Rocks, California · 14770 days ago · 9 km deep · 77 km away
  9. 1.610 km S of Tres Pinos, California · 14770 days ago · 4 km deep · 15 km away
  10. 1.918 km NE of East Foothills, California · 14771 days ago · 6 km deep · 86 km away
  11. 1.620 km S of Davenport, California · 14771 days ago · 2 km deep · 64 km away
  12. 2.616 km NE of East Foothills, California · 14771 days ago · 2 km deep · 81 km away
  13. 1.65 km NNE of Tres Pinos, California · 14771 days ago · 4 km deep · 17 km away
  14. 2.05 km S of Gilroy, California · 14771 days ago · 6 km deep · 24 km away
  15. 1.93 km SSE of Los Banos, California · 14771 days ago · 18 km deep · 63 km away
  16. 1.76 km WSW of Gilroy, California · 14771 days ago · 3 km deep · 29 km away
  17. 2.55 km SW of Gilroy, California · 14772 days ago · 6 km deep · 26 km away
  18. 1.713 km ENE of East Foothills, California · 14772 days ago · 7 km deep · 77 km away
  19. 1.722 km NNE of Soledad, California · 14772 days ago · 2 km deep · 30 km away
  20. 1.5Northern California · 14773 days ago · 3 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc70906 (also filed as usp0002t43). Read Tue, Sep 29, 2026, 1:29 AM UTC.