California earthquakes

M1.9 earthquake 9 km SSW of Ridgemark, California

A magnitude 1.9 earthquake struck 9 km SSW of Ridgemark, California on Tue, Apr 16, 1985, 4:16 AM PST (12:16 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.4 19 km SSW of Santa Cruz, 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
1.9 (md), micro
Local time
UTC
1985-04-16 12:16:35 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
36.736° N, 121.404° 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
±0.19
Depth from
From location
Station coverage gap
32°
Stations used
48

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 153 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.419 km SSW of Santa Cruz, California · 15134 days ago · 3 km deep · 61 km away
  2. 1.914 km E of Seven Trees, California · 15134 days ago · 5 km deep · 67 km away
  3. 1.722 km NE of San Lucas, California · 15134 days ago · 6 km deep · 72 km away
  4. 2.03 km ESE of Aromas, California · 15133 days ago · 7 km deep · 24 km away
  5. 2.4Northern California · 15133 days ago · 8 km deep · 34 km away
  6. 2.68 km ENE of Morgan Hill, California · 15133 days ago · 3 km deep · 49 km away
  7. 1.65 km S of Three Rocks, California · 15132 days ago · 3 km deep · 96 km away
  8. 1.816 km E of Seven Trees, California · 15131 days ago · 8 km deep · 64 km away
  9. 1.68 km ESE of East Foothills, California · 15131 days ago · 7 km deep · 75 km away
  10. 1.79 km ESE of East Foothills, California · 15131 days ago · 7 km deep · 74 km away
  11. 2.59 km S of Tres Pinos, California · 15130 days ago · 2 km deep · 7 km away
  12. 2.39 km S of Tres Pinos, California · 15130 days ago · 3 km deep · 7 km away
  13. 1.826 km NE of Greenfield, California · 15130 days ago · 6 km deep · 46 km away
  14. 1.516 km SSE of Tres Pinos, California · 15130 days ago · 5 km deep · 15 km away
  15. 1.74 km SE of Portola Valley, California · 15130 days ago · 10 km deep · 99 km away
  16. 2.010 km S of Tres Pinos, California · 15130 days ago · 3 km deep · 9 km away
  17. 2.1Near the coast of Central California · 15130 days ago · 15 km deep · 85 km away
  18. 2.713 km ESE of Alum Rock, California · 15129 days ago · 7 km deep · 69 km away
  19. 2.318 km SSE of Tres Pinos, California · 15129 days ago · 6 km deep · 18 km away
  20. 1.629 km SE of Big Sur, California · 15128 days ago · 6 km deep · 70 km away
  21. 3.08 km NE of San Martin, California · 15128 days ago · 7 km deep · 45 km away
  22. 1.629 km SE of Big Sur, California · 15128 days ago · 7 km deep · 70 km away
  23. 1.98 km ENE of San Martin, California · 15128 days ago · 7 km deep · 43 km away
  24. 2.923 km ENE of Soledad, California · 15128 days ago · 4 km deep · 38 km away
  25. 2.58 km ENE of San Martin, California · 15128 days ago · 7 km deep · 45 km away
  26. 3.08 km ENE of San Martin, California · 15127 days ago · 7 km deep · 45 km away
  27. 2.09 km NE of San Martin, California · 15127 days ago · 7 km deep · 46 km away
  28. 1.523 km ENE of Soledad, California · 15127 days ago · 4 km deep · 38 km away
  29. 1.615 km NW of Coalinga, California · 15126 days ago · 6 km deep · 100 km away
  30. 2.226 km NE of Soledad, California · 15126 days ago · 8 km deep · 31 km away
  31. 1.921 km NE of Soledad, California · 15126 days ago · 2 km deep · 31 km away
  32. 1.622 km NE of Soledad, California · 15126 days ago · 6 km deep · 33 km away
  33. 1.623 km W of Diablo Grande, California · 15125 days ago · 6 km deep · 77 km away
  34. 1.68 km ENE of San Martin, California · 15125 days ago · 7 km deep · 43 km away
  35. 1.68 km S of San Ardo, California · 15124 days ago · 8 km deep · 99 km away
  36. 3.024 km ENE of Greenfield, California · 15124 days ago · 8 km deep · 48 km away
  37. 1.512 km NNE of Hollister, California · 15124 days ago · 8 km deep · 25 km away
  38. 2.323 km ENE of Soledad, California · 15124 days ago · 2 km deep · 37 km away
  39. 2.413 km S of Tres Pinos, California · 15124 days ago · 4 km deep · 12 km away
  40. 2.221 km NE of Soledad, California · 15124 days ago · 4 km deep · 27 km away
  41. 3.15 km S of Gilroy, California · 15123 days ago · 5 km deep · 29 km away
  42. 3.012 km S of Tres Pinos, California · 15123 days ago · 4 km deep · 12 km away
  43. 1.624 km NE of Greenfield, California · 15123 days ago · 6 km deep · 45 km away
  44. 1.624 km ENE of Soledad, California · 15123 days ago · 3 km deep · 40 km away
  45. 2.412 km S of Tres Pinos, California · 15123 days ago · 5 km deep · 11 km away
  46. 1.713 km S of Tres Pinos, California · 15123 days ago · 4 km deep · 12 km away
  47. 1.65 km SE of Tres Pinos, California · 15123 days ago · 8 km deep · 12 km away
  48. 1.7Northern California · 15122 days ago · 2 km deep · 66 km away
  49. 1.94 km NE of East Foothills, California · 15122 days ago · 3 km deep · 83 km away
  50. 2.05 km SW of Ridgemark, California · 15122 days ago · 7 km deep · 5 km away
  51. 1.828 km SE of Big Sur, California · 15122 days ago · 3 km deep · 73 km away
  52. 1.624 km NE of Greenfield, California · 15122 days ago · 7 km deep · 46 km away
  53. 1.88 km ENE of San Martin, California · 15121 days ago · 5 km deep · 43 km away
  54. 3.115 km E of Seven Trees, California · 15121 days ago · 4 km deep · 65 km away
  55. 1.630 km NE of Soledad, California · 15121 days ago · 7 km deep · 37 km away
  56. 2.815 km SSE of Tres Pinos, California · 15120 days ago · 5 km deep · 15 km away
  57. 2.111 km ESE of East Foothills, California · 15119 days ago · 7 km deep · 71 km away
  58. 1.511 km ESE of East Foothills, California · 15119 days ago · 7 km deep · 71 km away
  59. 1.611 km ESE of East Foothills, California · 15119 days ago · 7 km deep · 71 km away
  60. 1.83 km ESE of Aromas, California · 15118 days ago · 7 km deep · 24 km away

The first 60 of 153.

Before

  1. 2.126 km NE of Soledad, California · 15135 days ago · 8 km deep · 35 km away
  2. 1.927 km E of Tres Pinos, California · 15136 days ago · 4 km deep · 34 km away
  3. 2.224 km NE of King City, California · 15137 days ago · 8 km deep · 60 km away
  4. 2.04 km SW of Cupertino, California · 15137 days ago · 5 km deep · 85 km away
  5. 2.44 km WNW of Saratoga, California · 15137 days ago · 4 km deep · 85 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc46189. Read Tue, Sep 22, 2026, 7:50 PM UTC.