California earthquakes

M1.5 earthquake 10 km SW of Ridgemark, California

A magnitude 1.5 earthquake struck 10 km SW of Ridgemark, California on Mon, Jan 22, 1990, 12:59 PM PST (20:59 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.1 4 km E of Interlaken, 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-01-22 20:59:07 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
36.755° N, 121.457° 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, 0.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
78°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 184 in the 60 days after this one and 189 in the 30 days before it.

After

  1. 1.97 km WSW of Saratoga, California · 13403 days ago · 9 km deep · 79 km away
  2. 2.94 km ESE of Interlaken, CA · 13403 days ago · 13 km deep · 29 km away
  3. 3.15 km ESE of Interlaken, California · 13403 days ago · 11 km deep · 28 km away
  4. 2.023 km NNE of San Lucas, California · 13402 days ago · 5 km deep · 71 km away
  5. 1.89 km SW of Davenport, California · 13402 days ago · 3 km deep · 75 km away
  6. 1.63 km ESE of Aromas, California · 13402 days ago · 10 km deep · 19 km away
  7. 1.83 km ESE of Aromas, California · 13402 days ago · 11 km deep · 19 km away
  8. 1.96 km NNE of Day Valley, California · 13401 days ago · 3 km deep · 51 km away
  9. 1.53 km N of Interlaken, California · 13401 days ago · 10 km deep · 35 km away
  10. 1.72 km ESE of San Ardo, California · 13401 days ago · 10 km deep · 97 km away
  11. 1.923 km ENE of Soledad, California · 13401 days ago · 6 km deep · 40 km away
  12. 1.96 km WNW of Volta, California · 13401 days ago · 0 km deep · 58 km away
  13. 2.16 km W of Volta, California · 13401 days ago · 0 km deep · 56 km away
  14. 1.99 km NNE of Day Valley, California · 13400 days ago · 4 km deep · 51 km away
  15. 2.111 km S of Tres Pinos, California · 13400 days ago · 4 km deep · 15 km away
  16. 3.111 km S of Tres Pinos, California · 13400 days ago · 5 km deep · 15 km away
  17. 3.911 km S of Tres Pinos, California · 13400 days ago · 5 km deep · 14 km away
  18. 1.910 km S of Tres Pinos, California · 13400 days ago · 4 km deep · 13 km away
  19. 2.110 km S of Tres Pinos, California · 13400 days ago · 5 km deep · 14 km away
  20. 2.410 km S of Tres Pinos, California · 13400 days ago · 4 km deep · 14 km away
  21. 1.711 km S of Tres Pinos, California · 13400 days ago · 4 km deep · 14 km away
  22. 1.81 km SE of Interlaken, California · 13400 days ago · 9 km deep · 31 km away
  23. 3.210 km S of Tres Pinos, California · 13400 days ago · 4 km deep · 13 km away
  24. 2.610 km S of Tres Pinos, California · 13400 days ago · 3 km deep · 14 km away
  25. 1.710 km S of Tres Pinos, California · 13399 days ago · 3 km deep · 13 km away
  26. 1.93 km NE of Interlaken, California · 13399 days ago · 6 km deep · 33 km away
  27. 2.311 km S of Tres Pinos, California · 13399 days ago · 3 km deep · 15 km away
  28. 2.711 km S of Tres Pinos, California · 13399 days ago · 4 km deep · 16 km away
  29. 3.13 km W of San Juan Bautista, California · 13399 days ago · 5 km deep · 15 km away
  30. 1.53 km NE of Interlaken, California · 13398 days ago · 8 km deep · 33 km away
  31. 1.924 km NE of King City, California · 13398 days ago · 1 km deep · 60 km away
  32. 1.59 km NNE of Day Valley, California · 13398 days ago · 3 km deep · 52 km away
  33. 2.13 km W of San Juan Bautista, California · 13398 days ago · 4 km deep · 15 km away
  34. 1.910 km WNW of Volta, California · 13398 days ago · 0 km deep · 56 km away
  35. 2.21 km NE of Interlaken, California · 13398 days ago · 14 km deep · 33 km away
  36. 1.61 km NE of Corralitos, California · 13398 days ago · 15 km deep · 41 km away
  37. 3.410 km S of Tres Pinos, California · 13398 days ago · 4 km deep · 14 km away
  38. 1.910 km S of Tres Pinos, California · 13398 days ago · 3 km deep · 14 km away
  39. 3.110 km S of Tres Pinos, California · 13398 days ago · 4 km deep · 13 km away
  40. 2.09 km S of Tres Pinos, California · 13398 days ago · 3 km deep · 12 km away
  41. 2.022 km NE of Soledad, California · 13398 days ago · 7 km deep · 37 km away
  42. 1.727 km SW of Firebaugh, California · 13398 days ago · 0 km deep · 66 km away
  43. 1.81 km NNW of Day Valley, California · 13397 days ago · 13 km deep · 49 km away
  44. 1.912 km S of Tres Pinos, California · 13397 days ago · 3 km deep · 17 km away
  45. 1.87 km SSE of Cambrian Park, California · 13397 days ago · 12 km deep · 63 km away
  46. 2.310 km S of Tres Pinos, California · 13397 days ago · 4 km deep · 14 km away
  47. 1.711 km S of Tres Pinos, California · 13397 days ago · 3 km deep · 14 km away
  48. 1.722 km WNW of Three Rocks, California · 13397 days ago · 11 km deep · 78 km away
  49. 1.914 km E of Seven Trees, California · 13397 days ago · 1 km deep · 63 km away
  50. 2.27 km SE of San Juan Bautista, California · 13397 days ago · 9 km deep · 5 km away
  51. 1.55 km ENE of Lexington Hills, California · 13397 days ago · 9 km deep · 62 km away
  52. 2.02 km WSW of Hollister, California · 13396 days ago · 2 km deep · 10 km away
  53. 1.615 km S of Davenport, California · 13396 days ago · 3 km deep · 64 km away
  54. 3.321 km NE of Soledad, California · 13396 days ago · 3 km deep · 34 km away
  55. 2.021 km NE of Soledad, California · 13396 days ago · 2 km deep · 34 km away
  56. 1.92 km WNW of Boulder Creek, California · 13395 days ago · 9 km deep · 74 km away
  57. 1.812 km SSE of Tres Pinos, California · 13395 days ago · 5 km deep · 18 km away
  58. 1.95 km SSW of Monte Sereno, California · 13395 days ago · 12 km deep · 70 km away
  59. 1.515 km E of Seven Trees, California · 13395 days ago · 3 km deep · 62 km away
  60. 1.519 km SSE of Tres Pinos, California · 13395 days ago · 5 km deep · 26 km away

The first 60 of 184.

Before

  1. 2.710 km SW of Ridgemark, California · 13403 days ago · 6 km deep · 1 km away
  2. 1.719 km WSW of Volta, California · 13403 days ago · 4 km deep · 42 km away
  3. 1.824 km SE of Big Sur, California · 13403 days ago · 8 km deep · 73 km away
  4. 1.64 km E of Interlaken, California · 13403 days ago · 9 km deep · 30 km away
  5. 1.93 km NNW of Aromas, California · 13403 days ago · 7 km deep · 26 km away
  6. 1.65 km SW of Gilroy, California · 13403 days ago · 3 km deep · 29 km away
  7. 3.02 km SW of Loyola, California · 13404 days ago · 6 km deep · 87 km away
  8. 1.7Central California · 13404 days ago · 4 km deep · 72 km away
  9. 1.65 km SE of Lexington Hills, California · 13404 days ago · 10 km deep · 60 km away
  10. 2.07 km WSW of Gilroy, California · 13404 days ago · 4 km deep · 31 km away
  11. 1.76 km SSW of Gilroy, California · 13404 days ago · 7 km deep · 25 km away
  12. 1.72 km NNE of Corralitos, California · 13404 days ago · 15 km deep · 42 km away
  13. 1.78 km ENE of San Martin, California · 13404 days ago · 7 km deep · 42 km away
  14. 2.73 km WNW of Lexington Hills, California · 13405 days ago · 11 km deep · 68 km away
  15. 2.313 km SSW of Pescadero, California · 13405 days ago · 9 km deep · 95 km away
  16. 2.15 km WNW of Day Valley, California · 13405 days ago · 16 km deep · 53 km away
  17. 1.61 km WSW of Portola Valley, California · 13405 days ago · 12 km deep · 99 km away
  18. 1.67 km N of Day Valley, California · 13405 days ago · 3 km deep · 53 km away
  19. 1.717 km SSE of Tres Pinos, California · 13405 days ago · 9 km deep · 22 km away
  20. 1.53 km NW of Lexington Hills, California · 13405 days ago · 7 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc151092. Read Sat, Oct 3, 2026, 6:33 PM UTC.