California earthquakes

M1.9 earthquake 5 km SSW of Ridgemark, California

A magnitude 1.9 earthquake struck 5 km SSW of Ridgemark, California on Sat, Jun 18, 1983, 12:55 AM PDT (07:55 UTC), 11 km (7 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.

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The earthquake

Magnitude
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-06-18 07:55:48 UTC
Depth
11.2 km (6.9 mi), shallow
Epicenter
36.766° N, 121.394° 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
±0.14
Depth from
From location
Station coverage gap
29°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 107 in the 30 days before it.

After

  1. 3.021 km NE of Soledad, California · 15812 days ago · 4 km deep · 29 km away
  2. 2.925 km ESE of Big Sur, California · 15812 days ago · 8 km deep · 70 km away
  3. 1.926 km ESE of Big Sur, California · 15811 days ago · 10 km deep · 70 km away
  4. 2.625 km ESE of Big Sur, California · 15811 days ago · 6 km deep · 69 km away
  5. 2.421 km NE of Soledad, California · 15811 days ago · 3 km deep · 32 km away
  6. 1.79 km N of East Foothills, California · 15811 days ago · 6 km deep · 86 km away
  7. 1.926 km ESE of Big Sur, California · 15811 days ago · 8 km deep · 70 km away
  8. 2.12 km SE of San Ardo, California · 15811 days ago · 9 km deep · 96 km away
  9. 2.026 km ESE of Big Sur, California · 15811 days ago · 6 km deep · 70 km away
  10. 2.720 km NNW of Coalinga, California · 15810 days ago · 10 km deep · 99 km away
  11. 1.624 km SE of Big Sur, California · 15810 days ago · 3 km deep · 71 km away
  12. 2.44 km W of San Juan Bautista, California · 15810 days ago · 9 km deep · 20 km away
  13. 2.024 km ESE of Big Sur, California · 15810 days ago · 6 km deep · 70 km away
  14. 1.926 km ESE of Big Sur, California · 15810 days ago · 5 km deep · 71 km away
  15. 1.725 km ESE of Big Sur, California · 15809 days ago · 7 km deep · 71 km away
  16. 1.525 km ESE of Big Sur, California · 15809 days ago · 4 km deep · 70 km away
  17. 3.512 km SSE of Tres Pinos, California · 15809 days ago · 6 km deep · 14 km away
  18. 1.526 km ESE of Big Sur, California · 15809 days ago · 4 km deep · 71 km away
  19. 2.325 km ESE of Big Sur, California · 15809 days ago · 8 km deep · 70 km away
  20. 1.824 km NE of Greenfield, California · 15809 days ago · 6 km deep · 45 km away
  21. 2.922km SW of San Joaquin, CA · 15808 days ago · 5 km deep · 100 km away
  22. 1.823 km NE of Greenfield, California · 15808 days ago · 8 km deep · 46 km away
  23. 2.722 km NE of San Lucas, California · 15808 days ago · 6 km deep · 76 km away
  24. 2.525 km ESE of Big Sur, California · 15808 days ago · 5 km deep · 71 km away
  25. 2.225 km ESE of Big Sur, California · 15808 days ago · 7 km deep · 70 km away
  26. 1.65 km WSW of Gilroy, California · 15808 days ago · 2 km deep · 31 km away
  27. 1.621 km E of East Foothills, California · 15808 days ago · 7 km deep · 74 km away
  28. 1.926 km ESE of Big Sur, California · 15807 days ago · 5 km deep · 70 km away
  29. 1.725 km ESE of Big Sur, California · 15807 days ago · 4 km deep · 71 km away
  30. 2.17 km ENE of Hollister, California · 15807 days ago · 8 km deep · 13 km away
  31. 1.926 km ESE of Big Sur, California · 15807 days ago · 8 km deep · 71 km away
  32. 1.925 km ESE of Big Sur, California · 15807 days ago · 4 km deep · 68 km away
  33. 2.312 km SSE of Tres Pinos, California · 15807 days ago · 4 km deep · 14 km away
  34. 2.324 km ESE of Big Sur, California · 15807 days ago · 7 km deep · 70 km away
  35. 1.58 km W of Greenfield, California · 15806 days ago · 11 km deep · 49 km away
  36. 1.823 km NNE of San Ardo, California · 15806 days ago · 5 km deep · 84 km away
  37. 1.924 km ESE of Big Sur, California · 15806 days ago · 5 km deep · 70 km away
  38. 3.122 km NE of Soledad, California · 15806 days ago · 3 km deep · 27 km away
  39. 2.19 km E of San Martin, California · 15806 days ago · 4 km deep · 38 km away
  40. 1.822 km NE of Soledad, California · 15806 days ago · 2 km deep · 27 km away
  41. 1.79 km ESE of East Foothills, California · 15806 days ago · 9 km deep · 72 km away
  42. 2.19 km ESE of East Foothills, California · 15806 days ago · 8 km deep · 71 km away
  43. 1.524 km NE of Greenfield, California · 15805 days ago · 2 km deep · 45 km away
  44. 2.224 km ESE of Big Sur, California · 15805 days ago · 7 km deep · 70 km away
  45. 2.424 km ESE of Big Sur, California · 15805 days ago · 13 km deep · 70 km away
  46. 3.47 km WSW of Gilroy, California · 15805 days ago · 5 km deep · 33 km away
  47. 1.77 km WSW of Gilroy, California · 15805 days ago · 4 km deep · 33 km away
  48. 1.520 km E of East Foothills, California · 15805 days ago · 6 km deep · 71 km away
  49. 2.36 km WSW of Gilroy, California · 15805 days ago · 4 km deep · 33 km away
  50. 2.46 km WSW of Gilroy, California · 15805 days ago · 4 km deep · 33 km away
  51. 2.725 km ESE of Big Sur, California · 15805 days ago · 6 km deep · 70 km away
  52. 2.324 km ESE of Big Sur, California · 15805 days ago · 3 km deep · 70 km away
  53. 1.729 km WNW of Three Rocks, California · 15804 days ago · 16 km deep · 64 km away
  54. 2.726 km E of Tres Pinos, California · 15803 days ago · 1 km deep · 33 km away
  55. 1.622 km NE of Soledad, California · 15803 days ago · 3 km deep · 27 km away
  56. 2.521 km NE of Soledad, California · 15802 days ago · 5 km deep · 29 km away
  57. 2.021 km NE of Soledad, California · 15802 days ago · 6 km deep · 29 km away
  58. 2.126 km ESE of Big Sur, California · 15802 days ago · 8 km deep · 69 km away
  59. 2.123 km NE of Soledad, California · 15802 days ago · 9 km deep · 31 km away
  60. 2.07 km ENE of Seven Trees, California · 15801 days ago · 8 km deep · 70 km away

The first 60 of 183.

Before

  1. 1.626 km SE of Big Sur, California · 15812 days ago · 4 km deep · 72 km away
  2. 1.926 km ESE of Big Sur, California · 15812 days ago · 9 km deep · 71 km away
  3. 2.416 km NE of East Foothills, California · 15812 days ago · 6 km deep · 85 km away
  4. 2.324 km SE of Big Sur, California · 15812 days ago · 5 km deep · 71 km away
  5. 2.825 km ESE of Big Sur, California · 15812 days ago · 6 km deep · 70 km away
  6. 2.524 km ESE of Big Sur, California · 15812 days ago · 7 km deep · 70 km away
  7. 2.425 km SE of Big Sur, California · 15812 days ago · 8 km deep · 71 km away
  8. 1.828 km ENE of Soledad, California · 15812 days ago · 5 km deep · 38 km away
  9. 2.026 km ESE of Big Sur, California · 15813 days ago · 16 km deep · 70 km away
  10. 1.826 km ESE of Big Sur, California · 15813 days ago · 9 km deep · 70 km away
  11. 1.526 km ESE of Big Sur, California · 15813 days ago · 10 km deep · 71 km away
  12. 2.126 km SE of Big Sur, California · 15813 days ago · 4 km deep · 72 km away
  13. 3.126 km ESE of Big Sur, California · 15813 days ago · 7 km deep · 70 km away
  14. 1.620 km ENE of San Lucas, California · 15813 days ago · 6 km deep · 83 km away
  15. 2.52 km SE of San Ardo, California · 15813 days ago · 10 km deep · 96 km away
  16. 2.723 km NNE of San Ardo, California · 15813 days ago · 6 km deep · 84 km away
  17. 2.223 km ENE of San Lucas, California · 15813 days ago · 5 km deep · 81 km away
  18. 2.011 km ENE of Morgan Hill, California · 15814 days ago · 4 km deep · 47 km away
  19. 2.016 km SE of Livermore, CA · 15814 days ago · 2 km deep · 92 km away
  20. 1.6Northern California · 15814 days ago · 2 km deep · 92 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1097059. Read Fri, Oct 2, 2026, 6:39 AM UTC.