California earthquakes

M1.6 earthquake 7 km NE of Ridgemark, CA

A magnitude 1.6 earthquake struck 7 km NE of Ridgemark, CA on Tue, Apr 29, 1986, 5:09 AM PDT (12:09 UTC), 4 km (2 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1986-04-29 12:09:00 UTC
Depth
3.8 km (2.3 mi), shallow
Epicenter
36.851° N, 121.306° 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, 0.3 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
99°
Stations used
36

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 187 in the 30 days before it.

After

  1. 1.510 km S of Tres Pinos, California · 14766 days ago · 4 km deep · 17 km away
  2. 1.82 km SSE of Sunol, California · 14766 days ago · 12 km deep · 95 km away
  3. 1.623 km ENE of Soledad, California · 14766 days ago · 6 km deep · 45 km away
  4. 2.05 km ENE of Tres Pinos, California · 14766 days ago · 8 km deep · 6 km away
  5. 1.921 km NE of Soledad, California · 14766 days ago · 2 km deep · 34 km away
  6. 2.45 km NNE of Tres Pinos, California · 14765 days ago · 7 km deep · 3 km away
  7. 2.318 km NE of East Foothills, California · 14765 days ago · 7 km deep · 81 km away
  8. 1.918 km NE of East Foothills, California · 14765 days ago · 8 km deep · 81 km away
  9. 2.725 km ENE of East Foothills, California · 14765 days ago · 7 km deep · 76 km away
  10. 1.711 km NE of East Foothills, California · 14765 days ago · 3 km deep · 77 km away
  11. 2.46 km NE of Ridgemark, California · 14765 days ago · 4 km deep · 0 km away
  12. 2.26 km NE of Ridgemark, California · 14765 days ago · 4 km deep · 0 km away
  13. 1.73 km N of East Foothills, California · 14764 days ago · 3 km deep · 77 km away
  14. 1.84 km SE of Tres Pinos, California · 14764 days ago · 7 km deep · 10 km away
  15. 1.813 km NE of East Foothills, California · 14764 days ago · 8 km deep · 75 km away
  16. 2.3Central California · 14763 days ago · 7 km deep · 2 km away
  17. 1.812 km N of Morgan Hill, California · 14763 days ago · 6 km deep · 52 km away
  18. 2.618 km NE of East Foothills, California · 14763 days ago · 7 km deep · 80 km away
  19. 1.531 km ENE of Soledad, California · 14763 days ago · 7 km deep · 40 km away
  20. 1.67 km SE of La Honda, California · 14763 days ago · 5 km deep · 93 km away
  21. 1.713 km ENE of Gilroy, California · 14763 days ago · 18 km deep · 23 km away
  22. 1.918 km NE of East Foothills, California · 14763 days ago · 12 km deep · 81 km away
  23. 1.66 km NNE of Tres Pinos, California · 14762 days ago · 3 km deep · 1 km away
  24. 2.16 km NE of Ridgemark, California · 14762 days ago · 5 km deep · 0 km away
  25. 1.75 km E of Tres Pinos, California · 14762 days ago · 8 km deep · 8 km away
  26. 2.618 km NE of East Foothills, California · 14762 days ago · 7 km deep · 81 km away
  27. 2.718 km NE of East Foothills, California · 14762 days ago · 7 km deep · 81 km away
  28. 1.86 km NE of Ridgemark, California · 14762 days ago · 4 km deep · 0 km away
  29. 2.418 km NE of East Foothills, California · 14762 days ago · 7 km deep · 81 km away
  30. 1.724 km NE of Greenfield, California · 14762 days ago · 7 km deep · 47 km away
  31. 2.01 km E of San Ardo, California · 14762 days ago · 11 km deep · 100 km away
  32. 2.518 km NE of East Foothills, California · 14761 days ago · 8 km deep · 81 km away
  33. 1.818 km SSE of Livermore, California · 14761 days ago · 8 km deep · 82 km away
  34. 1.518 km SSE of Livermore, California · 14760 days ago · 8 km deep · 83 km away
  35. 2.06 km NE of Ridgemark, California · 14760 days ago · 4 km deep · 2 km away
  36. 1.56 km NE of Ridgemark, California · 14760 days ago · 4 km deep · 2 km away
  37. 1.521 km NE of Soledad, California · 14760 days ago · 7 km deep · 33 km away
  38. 1.812 km ENE of East Foothills, California · 14760 days ago · 7 km deep · 71 km away
  39. 1.922 km ENE of San Ardo, California · 14759 days ago · 3 km deep · 100 km away
  40. 1.523 km ENE of San Ardo, California · 14759 days ago · 2 km deep · 100 km away
  41. 1.54 km E of Tres Pinos, California · 14759 days ago · 8 km deep · 7 km away
  42. 1.95 km NNE of Tres Pinos, California · 14759 days ago · 4 km deep · 1 km away
  43. 1.922 km NE of Soledad, California · 14759 days ago · 3 km deep · 38 km away
  44. 1.69 km SE of Seven Trees, California · 14759 days ago · 6 km deep · 58 km away
  45. 1.917 km NE of East Foothills, California · 14759 days ago · 6 km deep · 80 km away
  46. 2.05 km NNE of Tres Pinos, California · 14758 days ago · 4 km deep · 1 km away
  47. 2.013 km ENE of East Foothills, California · 14758 days ago · 5 km deep · 74 km away
  48. 1.74 km SE of Tres Pinos, California · 14758 days ago · 7 km deep · 10 km away
  49. 2.310 km NW of Bonny Doon, California · 14758 days ago · 16 km deep · 88 km away
  50. 2.513 km ENE of East Foothills, California · 14758 days ago · 8 km deep · 74 km away
  51. 2.26 km ENE of Interlaken, California · 14758 days ago · 10 km deep · 36 km away
  52. 1.89 km NNE of East Foothills, California · 14757 days ago · 5 km deep · 79 km away
  53. 3.05 km ESE of Tres Pinos, California · 14757 days ago · 9 km deep · 10 km away
  54. 1.98 km ENE of Gilroy, California · 14757 days ago · 8 km deep · 26 km away
  55. 1.719 km SSE of Livermore, California · 14757 days ago · 7 km deep · 82 km away
  56. 1.78 km E of San Martin, California · 14757 days ago · 3 km deep · 33 km away
  57. 3.08 km NE of Ridgemark, California · 14757 days ago · 8 km deep · 3 km away
  58. 1.62 km W of San Juan Bautista, California · 14757 days ago · 5 km deep · 23 km away
  59. 1.59 km NNE of East Foothills, California · 14757 days ago · 5 km deep · 79 km away
  60. 2.119 km SSE of Livermore, California · 14757 days ago · 7 km deep · 82 km away

The first 60 of 178.

Before

  1. 2.45 km ENE of Tres Pinos, California · 14767 days ago · 8 km deep · 6 km away
  2. 1.918 km NE of East Foothills, California · 14767 days ago · 6 km deep · 80 km away
  3. 1.75 km ENE of Tres Pinos, California · 14767 days ago · 8 km deep · 6 km away
  4. 1.75 km ENE of Tres Pinos, California · 14767 days ago · 8 km deep · 6 km away
  5. 2.129 km E of Tres Pinos, California · 14767 days ago · 1 km deep · 30 km away
  6. 1.81 km ENE of Del Monte Forest, California · 14767 days ago · 5 km deep · 62 km away
  7. 1.618 km NE of East Foothills, California · 14767 days ago · 8 km deep · 80 km away
  8. 3.65 km ENE of Tres Pinos, California · 14767 days ago · 8 km deep · 6 km away
  9. 3.515 km NE of East Foothills, California · 14767 days ago · 8 km deep · 77 km away
  10. 2.32 km E of San Ardo, California · 14767 days ago · 12 km deep · 100 km away
  11. 1.74 km SE of Tres Pinos, California · 14767 days ago · 6 km deep · 10 km away
  12. 2.24 km SE of Tres Pinos, California · 14767 days ago · 6 km deep · 10 km away
  13. 1.519 km SSE of Livermore, California · 14767 days ago · 7 km deep · 82 km away
  14. 2.318 km SSE of Livermore, California · 14768 days ago · 8 km deep · 82 km away
  15. 1.612 km N of Morgan Hill, California · 14768 days ago · 6 km deep · 54 km away
  16. 1.515 km NE of Hollister, California · 14768 days ago · 11 km deep · 11 km away
  17. 2.07 km ESE of Lexington Hills, California · 14768 days ago · 17 km deep · 61 km away
  18. 1.86 km ENE of Interlaken, California · 14768 days ago · 11 km deep · 34 km away
  19. 2.716 km SSE of Tres Pinos, California · 14769 days ago · 7 km deep · 23 km away
  20. 1.617 km NE of East Foothills, California · 14769 days ago · 3 km deep · 77 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc71382. Read Fri, Oct 2, 2026, 8:47 PM UTC.