California earthquakes

M1.8 earthquake 6 km SSW of Ridgemark, California

A magnitude 1.8 earthquake struck 6 km SSW of Ridgemark, California on Fri, Jun 10, 1983, 2:58 AM PDT (09:58 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.0 32 km NE of Soledad, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-06-10 09:58:54 UTC
Depth
9.8 km (6.1 mi), shallow
Epicenter
36.762° N, 121.396° 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, 0.5 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
30°
Stations used
49

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 179 in the 60 days after this one and 90 in the 30 days before it.

After

  1. 1.76 km SSW of Ridgemark, California · 15819 days ago · 10 km deep · 0 km away
  2. 2.114 km N of Morgan Hill, California · 15819 days ago · 3 km deep · 60 km away
  3. 1.820 km NW of Diablo Grande, California · 15819 days ago · 2 km deep · 86 km away
  4. 2.230 km NE of Soledad, California · 15818 days ago · 7 km deep · 36 km away
  5. 1.78 km E of San Martin, California · 15818 days ago · 0 km deep · 39 km away
  6. 2.523 km SSW of Three Rocks, California · 15818 days ago · 9 km deep · 92 km away
  7. 2.45 km NE of Morgan Hill, California · 15816 days ago · 4 km deep · 49 km away
  8. 1.96 km SSE of Gilroy, California · 15815 days ago · 5 km deep · 25 km away
  9. 1.922 km ENE of San Lucas, California · 15815 days ago · 5 km deep · 81 km away
  10. 1.710 km SE of Sunol, California · 15815 days ago · 5 km deep · 93 km away
  11. 1.89 km ENE of Morgan Hill, California · 15815 days ago · 6 km deep · 46 km away
  12. 2.39 km SSW of Three Rocks, California · 15814 days ago · 7 km deep · 95 km away
  13. 1.921 km NE of East Foothills, California · 15814 days ago · 5 km deep · 84 km away
  14. 2.12 km WSW of Stevinson, California · 15813 days ago · 0 km deep · 77 km away
  15. 1.911 km ESE of East Foothills, California · 15813 days ago · 6 km deep · 69 km away
  16. 1.6Northern California · 15813 days ago · 2 km deep · 92 km away
  17. 2.016 km SE of Livermore, CA · 15813 days ago · 2 km deep · 93 km away
  18. 2.011 km ENE of Morgan Hill, California · 15813 days ago · 4 km deep · 47 km away
  19. 2.223 km ENE of San Lucas, California · 15812 days ago · 5 km deep · 81 km away
  20. 2.723 km NNE of San Ardo, California · 15812 days ago · 6 km deep · 84 km away
  21. 2.52 km SE of San Ardo, California · 15812 days ago · 10 km deep · 96 km away
  22. 1.620 km ENE of San Lucas, California · 15812 days ago · 6 km deep · 83 km away
  23. 3.126 km ESE of Big Sur, California · 15811 days ago · 7 km deep · 70 km away
  24. 2.126 km SE of Big Sur, California · 15811 days ago · 4 km deep · 71 km away
  25. 1.526 km ESE of Big Sur, California · 15811 days ago · 10 km deep · 70 km away
  26. 1.826 km ESE of Big Sur, California · 15811 days ago · 9 km deep · 69 km away
  27. 2.026 km ESE of Big Sur, California · 15811 days ago · 16 km deep · 70 km away
  28. 1.828 km ENE of Soledad, California · 15811 days ago · 5 km deep · 38 km away
  29. 2.425 km SE of Big Sur, California · 15811 days ago · 8 km deep · 71 km away
  30. 2.524 km ESE of Big Sur, California · 15811 days ago · 7 km deep · 70 km away
  31. 2.825 km ESE of Big Sur, California · 15811 days ago · 6 km deep · 69 km away
  32. 2.324 km SE of Big Sur, California · 15811 days ago · 5 km deep · 71 km away
  33. 2.416 km NE of East Foothills, California · 15811 days ago · 6 km deep · 85 km away
  34. 1.926 km ESE of Big Sur, California · 15811 days ago · 9 km deep · 70 km away
  35. 1.626 km SE of Big Sur, California · 15811 days ago · 4 km deep · 71 km away
  36. 1.95 km SSW of Ridgemark, California · 15811 days ago · 11 km deep · 0 km away
  37. 3.021 km NE of Soledad, California · 15811 days ago · 4 km deep · 29 km away
  38. 2.925 km ESE of Big Sur, California · 15811 days ago · 8 km deep · 70 km away
  39. 1.926 km ESE of Big Sur, California · 15810 days ago · 10 km deep · 70 km away
  40. 2.625 km ESE of Big Sur, California · 15810 days ago · 6 km deep · 69 km away
  41. 2.421 km NE of Soledad, California · 15810 days ago · 3 km deep · 32 km away
  42. 1.79 km N of East Foothills, California · 15810 days ago · 6 km deep · 86 km away
  43. 1.926 km ESE of Big Sur, California · 15810 days ago · 8 km deep · 69 km away
  44. 2.12 km SE of San Ardo, California · 15810 days ago · 9 km deep · 96 km away
  45. 2.026 km ESE of Big Sur, California · 15810 days ago · 6 km deep · 70 km away
  46. 2.720 km NNW of Coalinga, California · 15809 days ago · 10 km deep · 98 km away
  47. 1.624 km SE of Big Sur, California · 15809 days ago · 3 km deep · 71 km away
  48. 2.44 km W of San Juan Bautista, California · 15809 days ago · 9 km deep · 20 km away
  49. 2.024 km ESE of Big Sur, California · 15809 days ago · 6 km deep · 70 km away
  50. 1.926 km ESE of Big Sur, California · 15809 days ago · 5 km deep · 71 km away
  51. 1.725 km ESE of Big Sur, California · 15808 days ago · 7 km deep · 70 km away
  52. 1.525 km ESE of Big Sur, California · 15808 days ago · 4 km deep · 69 km away
  53. 3.512 km SSE of Tres Pinos, California · 15808 days ago · 6 km deep · 14 km away
  54. 1.526 km ESE of Big Sur, California · 15808 days ago · 4 km deep · 70 km away
  55. 2.325 km ESE of Big Sur, California · 15808 days ago · 8 km deep · 69 km away
  56. 1.824 km NE of Greenfield, California · 15808 days ago · 6 km deep · 45 km away
  57. 2.922km SW of San Joaquin, CA · 15807 days ago · 5 km deep · 100 km away
  58. 1.823 km NE of Greenfield, California · 15807 days ago · 8 km deep · 46 km away
  59. 2.722 km NE of San Lucas, California · 15807 days ago · 6 km deep · 76 km away
  60. 2.525 km ESE of Big Sur, California · 15807 days ago · 5 km deep · 70 km away

The first 60 of 179.

Before

  1. 2.521 km NE of Soledad, California · 15819 days ago · 6 km deep · 29 km away
  2. 1.922 km ESE of Tres Pinos, California · 15819 days ago · 1 km deep · 28 km away
  3. 1.518 km NNW of Coalinga, California · 15821 days ago · 8 km deep · 99 km away
  4. 1.617 km NNW of Coalinga, California · 15821 days ago · 7 km deep · 99 km away
  5. 2.421 km NE of Soledad, California · 15821 days ago · 2 km deep · 30 km away
  6. 1.517 km NNW of Coalinga, California · 15822 days ago · 10 km deep · 100 km away
  7. 1.817 km NNW of Coalinga, California · 15822 days ago · 10 km deep · 100 km away
  8. 2.121 km NE of Soledad, California · 15822 days ago · 9 km deep · 34 km away
  9. 1.9Northern California · 15822 days ago · 3 km deep · 41 km away
  10. 1.8Central California · 15822 days ago · 5 km deep · 95 km away
  11. 1.718 km NNW of Coalinga, California · 15822 days ago · 8 km deep · 99 km away
  12. 1.723 km NNE of San Ardo, California · 15823 days ago · 5 km deep · 85 km away
  13. 1.733 km W of Three Rocks, California · 15823 days ago · 14 km deep · 66 km away
  14. 1.56 km ENE of East Foothills, California · 15823 days ago · 6 km deep · 78 km away
  15. 1.76 km SSW of Ridgemark, California · 15824 days ago · 10 km deep · 0 km away
  16. 1.628 km ENE of Soledad, California · 15824 days ago · 8 km deep · 37 km away
  17. 1.624 km SE of Tres Pinos, California · 15825 days ago · 9 km deep · 29 km away
  18. 2.121 km NE of Soledad, California · 15825 days ago · 5 km deep · 31 km away
  19. 1.89 km E of San Martin, California · 15825 days ago · 9 km deep · 38 km away
  20. 2.222 km ESE of Tres Pinos, California · 15825 days ago · 1 km deep · 28 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1096510. Read Thu, Oct 1, 2026, 6:06 AM UTC.