California earthquakes

M1.6 earthquake 1 km S of Ridgemark, California

A magnitude 1.6 earthquake struck 1 km S of Ridgemark, California on Tue, Mar 11, 1986, 10:59 PM PST (06:59 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M5.7 15 km NE of East Foothills, 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), micro
Local time
UTC
1986-03-12 06:59:52 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
36.797° N, 121.366° 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, 0.5 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
62°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and 151 in the 30 days before it.

After

  1. 2.121 km NNE of Soledad, California · 14809 days ago · 8 km deep · 27 km away
  2. 1.69 km E of San Martin, California · 14809 days ago · 8 km deep · 34 km away
  3. 2.74 km SW of Tres Pinos, California · 14809 days ago · 9 km deep · 4 km away
  4. 2.021 km NE of Soledad, California · 14809 days ago · 7 km deep · 29 km away
  5. 1.65 km NNE of Tres Pinos, California · 14808 days ago · 6 km deep · 8 km away
  6. 2.0Central California · 14808 days ago · 11 km deep · 87 km away
  7. 1.76 km NE of Ridgemark, California · 14808 days ago · 5 km deep · 8 km away
  8. 1.723 km NE of San Lucas, California · 14808 days ago · 7 km deep · 75 km away
  9. 1.722 km SSW of Los Banos, California · 14808 days ago · 1 km deep · 36 km away
  10. 1.730 km ENE of Soledad, California · 14808 days ago · 8 km deep · 39 km away
  11. 2.015 km N of Morgan Hill, California · 14807 days ago · 2 km deep · 58 km away
  12. 1.86 km NE of Ridgemark, California · 14807 days ago · 7 km deep · 7 km away
  13. 1.8Central California · 14806 days ago · 7 km deep · 4 km away
  14. 1.64 km SE of Tres Pinos, California · 14805 days ago · 9 km deep · 8 km away
  15. 2.35 km E of Fremont, California · 14805 days ago · 9 km deep · 97 km away
  16. 2.620 km S of Three Rocks, California · 14805 days ago · 10 km deep · 99 km away
  17. 2.020 km S of Three Rocks, California · 14805 days ago · 12 km deep · 98 km away
  18. 2.118 km SSW of Three Rocks, California · 14805 days ago · 10 km deep · 97 km away
  19. 1.79 km ENE of Morgan Hill, California · 14805 days ago · 5 km deep · 43 km away
  20. 1.61 km SW of Tres Pinos, California · 14804 days ago · 4 km deep · 4 km away
  21. 1.79 km NNE of Tres Pinos, California · 14803 days ago · 8 km deep · 11 km away
  22. 1.613 km N of Morgan Hill, California · 14803 days ago · 3 km deep · 56 km away
  23. 1.515 km NE of East Foothills, California · 14802 days ago · 8 km deep · 81 km away
  24. 2.014 km E of Seven Trees, California · 14802 days ago · 2 km deep · 62 km away
  25. 3.018 km SSW of Volta, California · 14802 days ago · 0 km deep · 35 km away
  26. 2.113 km ESE of East Foothills, California · 14801 days ago · 8 km deep · 65 km away
  27. 1.919 km SE of Big Sur, California · 14801 days ago · 15 km deep · 74 km away
  28. 1.98 km WSW of San Ardo, California · 14800 days ago · 10 km deep · 97 km away
  29. 2.75 km NE of Hollister, California · 14800 days ago · 6 km deep · 10 km away
  30. 1.65 km SE of Tres Pinos, California · 14800 days ago · 7 km deep · 9 km away
  31. 1.55 km NE of Hollister, California · 14800 days ago · 6 km deep · 10 km away
  32. 2.523 km ENE of San Ardo, California · 14800 days ago · 6 km deep · 98 km away
  33. 2.35 km NE of Tres Pinos, California · 14800 days ago · 8 km deep · 8 km away
  34. 2.08 km ENE of Hollister, California · 14799 days ago · 5 km deep · 11 km away
  35. 2.222 km NE of Soledad, California · 14799 days ago · 4 km deep · 28 km away
  36. 1.74 km ESE of Tres Pinos, California · 14799 days ago · 8 km deep · 8 km away
  37. 2.124 km ENE of Soledad, California · 14799 days ago · 1 km deep · 43 km away
  38. 1.8Central California · 14799 days ago · 8 km deep · 8 km away
  39. 2.915 km NE of East Foothills, California · 14799 days ago · 9 km deep · 81 km away
  40. 2.616 km NE of East Foothills, California · 14799 days ago · 8 km deep · 81 km away
  41. 1.711 km NNE of Hollister, California · 14798 days ago · 6 km deep · 17 km away
  42. 1.616 km NE of East Foothills, California · 14798 days ago · 8 km deep · 81 km away
  43. 2.34 km ESE of Tres Pinos, California · 14798 days ago · 8 km deep · 8 km away
  44. 1.9Northern California · 14798 days ago · 8 km deep · 81 km away
  45. 1.5Central California · 14798 days ago · 9 km deep · 8 km away
  46. 3.021 km NE of Soledad, California · 14798 days ago · 3 km deep · 31 km away
  47. 1.67 km NNE of Tres Pinos, California · 14797 days ago · 7 km deep · 9 km away
  48. 1.85 km NNE of Tres Pinos, California · 14797 days ago · 4 km deep · 7 km away
  49. 2.16 km NNE of Tres Pinos, California · 14797 days ago · 4 km deep · 8 km away
  50. 2.44 km NE of Tres Pinos, California · 14796 days ago · 8 km deep · 8 km away
  51. 2.05 km NE of Hollister, California · 14795 days ago · 5 km deep · 10 km away
  52. 3.214 km N of Morgan Hill, California · 14795 days ago · 6 km deep · 57 km away
  53. 1.627 km ENE of Soledad, California · 14794 days ago · 7 km deep · 38 km away
  54. 1.92 km SSW of San Juan Bautista, California · 14794 days ago · 6 km deep · 17 km away
  55. 2.24 km NNE of Tres Pinos, California · 14793 days ago · 5 km deep · 7 km away
  56. 1.714 km E of Tres Pinos, California · 14792 days ago · 5 km deep · 19 km away
  57. 1.63 km ENE of Tres Pinos, California · 14792 days ago · 8 km deep · 8 km away
  58. 1.74 km ENE of Tres Pinos, California · 14792 days ago · 9 km deep · 8 km away
  59. 2.715 km NE of East Foothills, California · 14791 days ago · 8 km deep · 81 km away
  60. 1.727 km ENE of Soledad, California · 14791 days ago · 11 km deep · 38 km away

The first 60 of 190.

Before

  1. 1.71 km S of Ridgemark, California · 14810 days ago · 4 km deep · 0 km away
  2. 1.73 km N of East Foothills, California · 14811 days ago · 0 km deep · 80 km away
  3. 1.910 km SSW of Tres Pinos, California · 14811 days ago · 6 km deep · 11 km away
  4. 1.96 km WSW of Gilroy, California · 14811 days ago · 6 km deep · 32 km away
  5. 1.620 km SSE of Tres Pinos, California · 14812 days ago · 4 km deep · 24 km away
  6. 1.623 km NE of San Lucas, California · 14812 days ago · 6 km deep · 71 km away
  7. 1.922 km NNE of Soledad, California · 14812 days ago · 5 km deep · 26 km away
  8. 1.65 km NNE of Tres Pinos, California · 14812 days ago · 4 km deep · 7 km away
  9. 1.715 km N of Morgan Hill, California · 14812 days ago · 6 km deep · 59 km away
  10. 1.68 km ENE of Gilroy, California · 14813 days ago · 6 km deep · 28 km away
  11. 2.29 km S of Tres Pinos, California · 14813 days ago · 7 km deep · 12 km away
  12. 1.66 km NNE of Tres Pinos, California · 14813 days ago · 3 km deep · 8 km away
  13. 1.95 km NNE of Tres Pinos, California · 14813 days ago · 4 km deep · 7 km away
  14. 1.523 km NE of San Ardo, California · 14814 days ago · 7 km deep · 88 km away
  15. 1.714 km E of Seven Trees, California · 14814 days ago · 3 km deep · 61 km away
  16. 1.614 km E of Seven Trees, California · 14814 days ago · 1 km deep · 61 km away
  17. 1.65 km NNE of Tres Pinos, California · 14814 days ago · 6 km deep · 8 km away
  18. 2.18 km ENE of San Martin, California · 14814 days ago · 6 km deep · 38 km away
  19. 2.35 km NE of Tres Pinos, California · 14814 days ago · 8 km deep · 8 km away
  20. 2.17 km ENE of Gilroy, California · 14815 days ago · 6 km deep · 28 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc67971. Read Mon, Sep 28, 2026, 2:26 PM UTC.