California earthquakes

M1.5 earthquake 5 km SSW of Ridgemark, California

A magnitude 1.5 earthquake struck 5 km SSW of Ridgemark, California on Tue, Mar 19, 1985, 2:02 AM PST (10:02 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M1.6 12 km N of Morgan Hill, 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
1.5 (md), micro
Local time
UTC
1985-03-19 10:02:16 UTC
Depth
8.7 km (5.4 mi), shallow
Epicenter
36.768° N, 121.380° 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, 0.4 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
43°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.612 km N of Morgan Hill, California · 15158 days ago · 7 km deep · 58 km away
  2. 2.219 km SSE of Tres Pinos, California · 15158 days ago · 5 km deep · 21 km away
  3. 2.723 km ENE of Soledad, California · 15158 days ago · 4 km deep · 39 km away
  4. 3.027 km E of Tres Pinos, California · 15157 days ago · 5 km deep · 32 km away
  5. 1.99 km NNW of Hollister, California · 15157 days ago · 2 km deep · 19 km away
  6. 1.79 km ENE of Morgan Hill, California · 15156 days ago · 5 km deep · 46 km away
  7. 2.323 km ENE of San Lucas, California · 15155 days ago · 6 km deep · 78 km away
  8. 2.7Central California · 15155 days ago · 5 km deep · 34 km away
  9. 1.615 km N of Morgan Hill, California · 15155 days ago · 6 km deep · 61 km away
  10. 1.624 km ENE of Greenfield, California · 15154 days ago · 6 km deep · 49 km away
  11. 1.515 km E of East Foothills, California · 15153 days ago · 8 km deep · 75 km away
  12. 1.913 km S of Tres Pinos, California · 15153 days ago · 5 km deep · 13 km away
  13. 2.321 km NE of Soledad, California · 15152 days ago · 4 km deep · 33 km away
  14. 1.98 km ENE of Morgan Hill, California · 15152 days ago · 3 km deep · 47 km away
  15. 3.216 km E of Seven Trees, California · 15151 days ago · 6 km deep · 62 km away
  16. 1.722 km NE of King City, California · 15150 days ago · 6 km deep · 61 km away
  17. 1.516 km E of Seven Trees, California · 15150 days ago · 5 km deep · 62 km away
  18. 1.624 km ENE of San Lucas, California · 15150 days ago · 9 km deep · 82 km away
  19. 1.719 km SE of Big Sur, California · 15150 days ago · 16 km deep · 71 km away
  20. 1.65 km NE of East Foothills, California · 15149 days ago · 5 km deep · 79 km away
  21. 2.514 km N of Morgan Hill, California · 15149 days ago · 4 km deep · 59 km away
  22. 1.723 km NE of San Lucas, California · 15149 days ago · 8 km deep · 73 km away
  23. 1.67 km ENE of San Martin, California · 15149 days ago · 3 km deep · 40 km away
  24. 1.627 km E of Tres Pinos, California · 15148 days ago · 4 km deep · 32 km away
  25. 1.77 km ENE of San Martin, California · 15148 days ago · 3 km deep · 40 km away
  26. 1.71 km N of Mountain View, California · 15148 days ago · 6 km deep · 94 km away
  27. 1.710 km NNE of Morgan Hill, California · 15148 days ago · 3 km deep · 54 km away
  28. 2.023 km NE of King City, California · 15147 days ago · 5 km deep · 60 km away
  29. 1.613 km N of Morgan Hill, California · 15147 days ago · 3 km deep · 58 km away
  30. 1.625 km NE of Greenfield, California · 15147 days ago · 3 km deep · 48 km away
  31. 2.37 km ENE of San Martin, California · 15146 days ago · 3 km deep · 40 km away
  32. 1.710 km SW of Ridgemark, California · 15146 days ago · 8 km deep · 7 km away
  33. 2.516 km N of Morgan Hill, California · 15145 days ago · 8 km deep · 61 km away
  34. 1.814 km N of Morgan Hill, California · 15145 days ago · 5 km deep · 60 km away
  35. 1.924 km ENE of Soledad, California · 15144 days ago · 8 km deep · 38 km away
  36. 2.9Central California · 15144 days ago · 7 km deep · 31 km away
  37. 3.326 km NE of Soledad, California · 15144 days ago · 8 km deep · 31 km away
  38. 2.011 km NNW of Hollister, California · 15143 days ago · 7 km deep · 22 km away
  39. 1.617 km ENE of East Foothills, California · 15143 days ago · 5 km deep · 76 km away
  40. 1.832 km W of Three Rocks, California · 15142 days ago · 9 km deep · 64 km away
  41. 2.133 km W of Three Rocks, California · 15142 days ago · 9 km deep · 63 km away
  42. 2.412 km NNE of East Foothills, California · 15141 days ago · 8 km deep · 86 km away
  43. 2.722 km NE of Soledad, California · 15141 days ago · 2 km deep · 27 km away
  44. 2.46 km E of Fremont, California · 15141 days ago · 9 km deep · 98 km away
  45. 1.86 km SSW of Sunol, California · 15141 days ago · 9 km deep · 99 km away
  46. 1.65 km E of Fremont, California · 15141 days ago · 9 km deep · 99 km away
  47. 1.75 km E of Fremont, California · 15141 days ago · 10 km deep · 99 km away
  48. 1.66 km E of Fremont, California · 15141 days ago · 10 km deep · 99 km away
  49. 3.112 km N of Morgan Hill, California · 15141 days ago · 5 km deep · 57 km away
  50. 1.717 km S of Davenport, California · 15141 days ago · 3 km deep · 75 km away
  51. 2.412 km N of Morgan Hill, California · 15139 days ago · 5 km deep · 57 km away
  52. 1.711 km S of Tres Pinos, California · 15139 days ago · 10 km deep · 11 km away
  53. 1.813 km N of Morgan Hill, California · 15139 days ago · 4 km deep · 58 km away
  54. 1.814 km N of Morgan Hill, California · 15139 days ago · 6 km deep · 60 km away
  55. 2.224 km NE of Greenfield, California · 15139 days ago · 5 km deep · 45 km away
  56. 1.66 km W of Greenfield, California · 15139 days ago · 9 km deep · 51 km away
  57. 1.529 km SSW of Los Banos, California · 15139 days ago · 2 km deep · 40 km away
  58. 1.64 km W of South Dos Palos, California · 15139 days ago · 10 km deep · 64 km away
  59. 3.123 km ENE of San Lucas, California · 15138 days ago · 6 km deep · 78 km away
  60. 2.324 km NE of King City, California · 15137 days ago · 7 km deep · 61 km away

The first 60 of 159.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc44203. Read Tue, Sep 22, 2026, 7:49 PM UTC.