California earthquakes

M1.6 earthquake 5 km SSW of Ridgemark, California

A magnitude 1.6 earthquake struck 5 km SSW of Ridgemark, California on Thu, Mar 24, 1983, 7:58 AM PST (15:58 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.9 6 km S of San Juan Bautista, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-03-24 15:58:14 UTC
Depth
9.3 km (5.8 mi), shallow
Epicenter
36.768° N, 121.399° 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 0.3 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
58°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 182 in the 60 days after this one and 69 in the 30 days before it.

After

  1. 1.718 km SSE of Tres Pinos, California · 15895 days ago · 7 km deep · 21 km away
  2. 1.914 km E of Seven Trees, California · 15895 days ago · 2 km deep · 63 km away
  3. 1.516 km SSE of Tres Pinos, California · 15895 days ago · 9 km deep · 17 km away
  4. 1.636 km SSW of South Dos Palos, California · 15895 days ago · 7 km deep · 49 km away
  5. 2.16 km ENE of Big Sur, California · 15895 days ago · 13 km deep · 62 km away
  6. 1.537 km SSW of South Dos Palos, California · 15894 days ago · 3 km deep · 48 km away
  7. 2.311 km S of Tres Pinos, California · 15894 days ago · 3 km deep · 12 km away
  8. 3.137 km SSW of South Dos Palos, California · 15894 days ago · 6 km deep · 49 km away
  9. 2.037 km SSW of South Dos Palos, California · 15894 days ago · 6 km deep · 49 km away
  10. 1.610 km S of Tres Pinos, California · 15894 days ago · 2 km deep · 9 km away
  11. 1.937 km SSW of South Dos Palos, California · 15894 days ago · 4 km deep · 50 km away
  12. 1.617 km SSE of Tres Pinos, California · 15894 days ago · 6 km deep · 19 km away
  13. 3.437 km SSW of South Dos Palos, California · 15893 days ago · 7 km deep · 49 km away
  14. 2.237 km SSW of South Dos Palos, California · 15893 days ago · 6 km deep · 49 km away
  15. 2.437 km SSW of South Dos Palos, California · 15893 days ago · 3 km deep · 49 km away
  16. 1.837 km SSW of South Dos Palos, California · 15893 days ago · 7 km deep · 50 km away
  17. 2.027 km NE of Soledad, California · 15891 days ago · 8 km deep · 37 km away
  18. 1.638 km SSW of South Dos Palos, California · 15891 days ago · 6 km deep · 49 km away
  19. 2.321 km SSE of Tres Pinos, California · 15890 days ago · 4 km deep · 23 km away
  20. 2.637 km SSW of South Dos Palos, California · 15890 days ago · 7 km deep · 49 km away
  21. 2.520 km SSE of Tres Pinos, California · 15888 days ago · 8 km deep · 23 km away
  22. 1.813 km ESE of Alum Rock, California · 15888 days ago · 3 km deep · 66 km away
  23. 1.637 km SSW of South Dos Palos, California · 15888 days ago · 1 km deep · 51 km away
  24. 2.033 km NE of San Lucas, California · 15887 days ago · 9 km deep · 71 km away
  25. 2.211 km WSW of Three Rocks, California · 15887 days ago · 12 km deep · 86 km away
  26. 1.820 km WSW of Greenfield, California · 15886 days ago · 20 km deep · 59 km away
  27. 2.323 km NE of San Lucas, California · 15886 days ago · 6 km deep · 70 km away
  28. 2.86 km NNE of East Foothills, California · 15885 days ago · 5 km deep · 83 km away
  29. 1.66 km NNE of East Foothills, California · 15884 days ago · 5 km deep · 83 km away
  30. 1.811 km SSE of Livermore, California · 15884 days ago · 4 km deep · 95 km away
  31. 1.634 km SW of South Dos Palos, California · 15883 days ago · 4 km deep · 46 km away
  32. 2.09 km SE of Alum Rock, California · 15883 days ago · 3 km deep · 68 km away
  33. 2.18 km ENE of San Martin, California · 15883 days ago · 4 km deep · 40 km away
  34. 2.024 km ENE of Soledad, California · 15882 days ago · 2 km deep · 42 km away
  35. 2.112 km S of Tres Pinos, California · 15882 days ago · 4 km deep · 13 km away
  36. 2.39 km ESE of Alum Rock, California · 15882 days ago · 2 km deep · 68 km away
  37. 2.49 km ESE of Alum Rock, California · 15882 days ago · 3 km deep · 69 km away
  38. 2.017 km SSE of Tres Pinos, California · 15881 days ago · 5 km deep · 19 km away
  39. 1.96 km NNE of East Foothills, California · 15881 days ago · 7 km deep · 82 km away
  40. 1.615 km W of Diablo Grande, California · 15881 days ago · 3 km deep · 72 km away
  41. 2.07 km NE of Ridgemark, California · 15881 days ago · 3 km deep · 13 km away
  42. 1.911 km S of Tres Pinos, California · 15879 days ago · 5 km deep · 13 km away
  43. 1.79 km NNE of Interlaken, California · 15879 days ago · 9 km deep · 39 km away
  44. 1.612 km SSE of Tres Pinos, California · 15879 days ago · 4 km deep · 14 km away
  45. 1.714 km SSE of Tres Pinos, California · 15879 days ago · 4 km deep · 16 km away
  46. 2.716 km SSE of Tres Pinos, California · 15879 days ago · 5 km deep · 17 km away
  47. 1.816 km SSE of Tres Pinos, California · 15879 days ago · 5 km deep · 18 km away
  48. 1.615 km SSE of Tres Pinos, California · 15879 days ago · 5 km deep · 17 km away
  49. 1.915 km SSE of Tres Pinos, California · 15879 days ago · 5 km deep · 17 km away
  50. 1.824 km NE of Greenfield, California · 15877 days ago · 5 km deep · 48 km away
  51. 1.625 km NE of Greenfield, California · 15877 days ago · 4 km deep · 46 km away
  52. 2.217 km SSE of Tres Pinos, California · 15877 days ago · 4 km deep · 19 km away
  53. 2.12 km S of San Juan Bautista, California · 15876 days ago · 4 km deep · 14 km away
  54. 1.515 km NNE of Morgan Hill, California · 15876 days ago · 7 km deep · 58 km away
  55. 2.09 km ENE of Morgan Hill, California · 15875 days ago · 3 km deep · 46 km away
  56. 1.58 km ENE of San Martin, California · 15875 days ago · 2 km deep · 40 km away
  57. 1.822 km SE of Tres Pinos, California · 15875 days ago · 8 km deep · 25 km away
  58. 1.73 km N of Hollister, California · 15875 days ago · 11 km deep · 13 km away
  59. 1.711 km SE of Big Sur, California · 15875 days ago · 2 km deep · 69 km away
  60. 2.124 km NE of Greenfield, California · 15875 days ago · 5 km deep · 45 km away

The first 60 of 182.

Before

  1. 2.122 km NE of Soledad, California · 15898 days ago · 3 km deep · 28 km away
  2. 1.825 km NE of Greenfield, CA · 15899 days ago · 5 km deep · 50 km away
  3. 1.81 km E of San Ardo, California · 15899 days ago · 10 km deep · 95 km away
  4. 1.71 km E of San Ardo, California · 15900 days ago · 10 km deep · 95 km away
  5. 1.73 km SSE of San Juan Bautista, California · 15901 days ago · 3 km deep · 13 km away
  6. 1.61 km WSW of Hollister, California · 15901 days ago · 5 km deep · 9 km away
  7. 1.922 km NE of Soledad, California · 15901 days ago · 7 km deep · 27 km away
  8. 1.623 km ENE of Soledad, California · 15901 days ago · 6 km deep · 38 km away
  9. 1.99 km ENE of Gilroy, California · 15902 days ago · 9 km deep · 31 km away
  10. 1.936 km SSW of South Dos Palos, California · 15902 days ago · 6 km deep · 50 km away
  11. 2.416 km ENE of San Martin, California · 15903 days ago · 6 km deep · 44 km away
  12. 2.123 km W of Three Rocks, California · 15903 days ago · 9 km deep · 74 km away
  13. 1.524 km ENE of Greenfield, California · 15903 days ago · -1 km deep · 53 km away
  14. 2.137 km SSW of South Dos Palos, California · 15903 days ago · 6 km deep · 50 km away
  15. 1.513 km S of Tres Pinos, California · 15904 days ago · 3 km deep · 14 km away
  16. 1.523 km ENE of Soledad, California · 15904 days ago · 3 km deep · 42 km away
  17. 1.723 km ENE of Soledad, California · 15904 days ago · 3 km deep · 41 km away
  18. 1.910 km N of Hollister, California · 15904 days ago · 9 km deep · 19 km away
  19. 1.622 km NE of Soledad, California · 15906 days ago · 6 km deep · 27 km away
  20. 1.731 km ENE of Soledad, California · 15906 days ago · 6 km deep · 44 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1089548. Read Thu, Oct 1, 2026, 3:10 PM UTC.