California earthquakes

M1.9 earthquake 2 km S of Ridgemark, California

A magnitude 1.9 earthquake struck 2 km S of Ridgemark, California on Thu, Jan 11, 1990, 9:23 AM PST (17:23 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.3 36 km WSW of Three Rocks, 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-01-11 17:23:15 UTC
Depth
3.2 km (2.0 mi), shallow
Epicenter
36.786° N, 121.372° 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
±0.17
Depth from
From location
Station coverage gap
47°
Stations used
43

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 189 in the 30 days before it.

After

  1. 1.722 km NE of Soledad, California · 13414 days ago · 3 km deep · 32 km away
  2. 1.64 km NNE of Soquel, California · 13414 days ago · 4 km deep · 56 km away
  3. 1.96 km WSW of Gilroy, California · 13414 days ago · 3 km deep · 31 km away
  4. 1.710 km S of Tres Pinos, California · 13414 days ago · 5 km deep · 10 km away
  5. 2.024 km NE of Greenfield, California · 13414 days ago · 7 km deep · 49 km away
  6. 1.54 km NNW of Aromas, California · 13414 days ago · 10 km deep · 30 km away
  7. 1.68 km NNE of Day Valley, California · 13414 days ago · 3 km deep · 55 km away
  8. 4.336 km WSW of Three Rocks, California · 13414 days ago · 13 km deep · 66 km away
  9. 1.735 km WSW of Three Rocks, California · 13414 days ago · 12 km deep · 66 km away
  10. 1.737 km NE of King City, California · 13414 days ago · 11 km deep · 65 km away
  11. 1.835 km WSW of Three Rocks, California · 13414 days ago · 12 km deep · 66 km away
  12. 1.636 km W of Three Rocks, California · 13414 days ago · 7 km deep · 64 km away
  13. 1.737 km WSW of Three Rocks, California · 13414 days ago · 12 km deep · 67 km away
  14. 1.713 km SSE of Davenport, California · 13414 days ago · 6 km deep · 71 km away
  15. 2.114 km S of South Dos Palos, California · 13413 days ago · 5 km deep · 61 km away
  16. 1.83 km NNE of Amesti, California · 13413 days ago · 14 km deep · 42 km away
  17. 1.536 km NE of King City, California · 13413 days ago · 9 km deep · 64 km away
  18. 1.813 km S of South Dos Palos, California · 13413 days ago · 7 km deep · 63 km away
  19. 1.836 km WSW of Three Rocks, California · 13413 days ago · 12 km deep · 66 km away
  20. 1.635 km NE of King City, California · 13413 days ago · 2 km deep · 60 km away
  21. 1.88 km SSW of Tres Pinos, California · 13413 days ago · 3 km deep · 8 km away
  22. 1.54 km NE of Soquel, California · 13413 days ago · 2 km deep · 56 km away
  23. 2.021 km NE of Soledad, California · 13413 days ago · 6 km deep · 32 km away
  24. 1.97 km N of Day Valley, California · 13413 days ago · 3 km deep · 55 km away
  25. 1.54 km E of Interlaken, California · 13413 days ago · 10 km deep · 33 km away
  26. 1.624 km NE of Greenfield, California · 13413 days ago · 6 km deep · 47 km away
  27. 2.317 km SSE of Tres Pinos, California · 13413 days ago · 4 km deep · 19 km away
  28. 1.74 km W of San Juan Bautista, California · 13413 days ago · 4 km deep · 20 km away
  29. 2.02 km SSE of Lexington Hills, California · 13412 days ago · 9 km deep · 66 km away
  30. 2.48 km SSW of Ridgemark, California · 13412 days ago · 6 km deep · 6 km away
  31. 2.011 km S of Tres Pinos, California · 13412 days ago · 4 km deep · 12 km away
  32. 2.621 km NE of Soledad, California · 13412 days ago · 2 km deep · 29 km away
  33. 1.63 km NNW of Aromas, California · 13412 days ago · 9 km deep · 29 km away
  34. 2.623 km ENE of Soledad, California · 13412 days ago · 5 km deep · 39 km away
  35. 1.66 km S of Tres Pinos, California · 13411 days ago · 9 km deep · 8 km away
  36. 1.8Near the coast of Central California · 13411 days ago · 6 km deep · 90 km away
  37. 2.26 km SW of Monte Sereno, California · 13411 days ago · 14 km deep · 76 km away
  38. 1.822 km ENE of Soledad, California · 13411 days ago · 5 km deep · 39 km away
  39. 2.524 km NE of Greenfield, California · 13411 days ago · 4 km deep · 49 km away
  40. 1.623 km ENE of Soledad, California · 13411 days ago · 6 km deep · 40 km away
  41. 1.917 km SSE of Tres Pinos, California · 13411 days ago · 4 km deep · 19 km away
  42. 1.623 km ENE of Soledad, California · 13410 days ago · 5 km deep · 40 km away
  43. 1.821 km NE of Soledad, California · 13410 days ago · 7 km deep · 29 km away
  44. 1.89 km S of Tres Pinos, California · 13410 days ago · 4 km deep · 10 km away
  45. 2.510 km ESE of East Foothills, California · 13410 days ago · 7 km deep · 69 km away
  46. 1.910 km ESE of East Foothills, California · 13410 days ago · 7 km deep · 69 km away
  47. 1.62 km SSE of Los Gatos, California · 13410 days ago · 2 km deep · 70 km away
  48. 2.78 km N of Day Valley, California · 13410 days ago · 4 km deep · 57 km away
  49. 1.54 km N of Interlaken, California · 13409 days ago · 14 km deep · 40 km away
  50. 3.11 km ENE of Aromas, California · 13408 days ago · 6 km deep · 26 km away
  51. 1.55 km S of Tres Pinos, California · 13408 days ago · 6 km deep · 6 km away
  52. 1.89 km ESE of East Foothills, California · 13408 days ago · 5 km deep · 70 km away
  53. 3.02 km W of Lexington Hills, California · 13407 days ago · 10 km deep · 70 km away
  54. 2.05 km ESE of Interlaken, California · 13407 days ago · 11 km deep · 32 km away
  55. 2.821 km NE of Soledad, California · 13407 days ago · 8 km deep · 34 km away
  56. 1.67 km N of Day Valley, California · 13406 days ago · 5 km deep · 55 km away
  57. 2.911 km S of Tres Pinos, California · 13406 days ago · 4 km deep · 12 km away
  58. 1.93 km ENE of Interlaken, California · 13406 days ago · 12 km deep · 34 km away
  59. 1.811 km S of Tres Pinos, California · 13406 days ago · 4 km deep · 12 km away
  60. 2.311 km S of Tres Pinos, California · 13406 days ago · 4 km deep · 12 km away

The first 60 of 190.

Before

  1. 1.731 km NE of Soledad, California · 13415 days ago · 8 km deep · 37 km away
  2. 2.121 km NE of Soledad, California · 13415 days ago · 6 km deep · 28 km away
  3. 2.32 km SSW of Lexington Hills, California · 13415 days ago · 12 km deep · 67 km away
  4. 1.821 km NE of Soledad, California · 13415 days ago · 6 km deep · 32 km away
  5. 2.45 km NNE of Corralitos, California · 13415 days ago · 8 km deep · 46 km away
  6. 2.09 km NNE of East Foothills, California · 13416 days ago · 7 km deep · 83 km away
  7. 1.624 km NE of Greenfield, California · 13416 days ago · 4 km deep · 44 km away
  8. 1.710 km S of Tres Pinos, California · 13416 days ago · 5 km deep · 11 km away
  9. 1.78 km ENE of San Martin, California · 13416 days ago · 6 km deep · 39 km away
  10. 1.624 km ENE of Greenfield, California · 13416 days ago · 3 km deep · 50 km away
  11. 1.93 km W of Lexington Hills, California · 13417 days ago · 11 km deep · 71 km away
  12. 1.81 km NNE of Lexington Hills, California · 13417 days ago · 5 km deep · 69 km away
  13. 1.66 km NE of East Foothills, California · 13417 days ago · 7 km deep · 79 km away
  14. 1.58 km SE of Livermore, California · 13418 days ago · 6 km deep · 98 km away
  15. 3.04 km ESE of Aromas, California · 13418 days ago · 6 km deep · 22 km away
  16. 2.23 km NNE of Amesti, California · 13418 days ago · 15 km deep · 42 km away
  17. 2.37 km S of Tres Pinos, California · 13418 days ago · 9 km deep · 8 km away
  18. 1.74 km ESE of Interlaken, California · 13418 days ago · 11 km deep · 32 km away
  19. 2.55 km WSW of Gilroy, California · 13418 days ago · 4 km deep · 31 km away
  20. 1.94 km ESE of Interlaken, California · 13418 days ago · 10 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc150475. Read Sun, Oct 4, 2026, 12:18 AM UTC.