California earthquakes

M1.6 earthquake 4 km SW of Ridgemark, California

A magnitude 1.6 earthquake struck 4 km SW of Ridgemark, California on Sun, May 22, 1983, 8:50 PM PDT (03:50 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.9 26 km ESE of Big Sur, 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
1983-05-23 03:50:37 UTC
Depth
4.3 km (2.6 mi), shallow
Epicenter
36.786° N, 121.407° 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
±0.20
Depth from
From location
Station coverage gap
38°
Stations used
33

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 119 in the 30 days before it.

After

  1. 2.021 km NNE of Soledad, California · 15837 days ago · 8 km deep · 26 km away
  2. 1.64 km E of Seven Trees, California · 15836 days ago · 3 km deep · 66 km away
  3. 2.024 km NE of Greenfield, California · 15836 days ago · 3 km deep · 47 km away
  4. 3.021 km NE of Soledad, California · 15835 days ago · 3 km deep · 33 km away
  5. 1.622 km ENE of San Lucas, California · 15835 days ago · 7 km deep · 81 km away
  6. 1.811 km NNW of Boulder Creek, California · 15834 days ago · 7 km deep · 83 km away
  7. 1.625 km ENE of Greenfield, California · 15834 days ago · 1 km deep · 53 km away
  8. 2.224 km SE of Tres Pinos, California · 15833 days ago · 10 km deep · 30 km away
  9. 1.923 km NNE of San Lucas, California · 15831 days ago · 5 km deep · 70 km away
  10. 1.79 km ESE of Prunedale, California · 15830 days ago · 10 km deep · 15 km away
  11. 2.06 km ESE of East Foothills, California · 15830 days ago · 2 km deep · 71 km away
  12. 2.524 km NE of Greenfield, California · 15829 days ago · 6 km deep · 47 km away
  13. 2.024 km NE of Greenfield, California · 15829 days ago · 5 km deep · 48 km away
  14. 1.725 km SW of South Dos Palos, California · 15829 days ago · -1 km deep · 48 km away
  15. 2.624 km ENE of Soledad, California · 15829 days ago · 8 km deep · 39 km away
  16. 2.324 km ENE of Soledad, California · 15829 days ago · 8 km deep · 40 km away
  17. 1.920 km SSE of Tres Pinos, California · 15829 days ago · 5 km deep · 24 km away
  18. 1.827 km WNW of Coalinga, California · 15828 days ago · 8 km deep · 91 km away
  19. 2.425 km NW of Coalinga, California · 15828 days ago · 15 km deep · 93 km away
  20. 2.032 km ENE of Greenfield, California · 15828 days ago · 6 km deep · 57 km away
  21. 1.74 km S of San Juan Bautista, California · 15828 days ago · 10 km deep · 11 km away
  22. 1.822 km ENE of San Ardo, California · 15827 days ago · 5 km deep · 98 km away
  23. 1.725 km NE of Greenfield, California · 15827 days ago · 6 km deep · 49 km away
  24. 1.915 km SSE of Tres Pinos, California · 15827 days ago · 5 km deep · 19 km away
  25. 1.621 km SSE of Tres Pinos, California · 15827 days ago · 7 km deep · 25 km away
  26. 2.518 km NE of King City, California · 15827 days ago · 5 km deep · 67 km away
  27. 2.021 km NE of Soledad, California · 15826 days ago · 7 km deep · 33 km away
  28. 1.621 km ENE of Greenfield, California · 15826 days ago · 11 km deep · 54 km away
  29. 2.036 km SSW of South Dos Palos, California · 15826 days ago · 6 km deep · 50 km away
  30. 2.024 km SE of Tres Pinos, California · 15825 days ago · 9 km deep · 30 km away
  31. 2.222 km ESE of Tres Pinos, California · 15825 days ago · 1 km deep · 30 km away
  32. 1.89 km E of San Martin, California · 15825 days ago · 9 km deep · 35 km away
  33. 2.121 km NE of Soledad, California · 15825 days ago · 5 km deep · 33 km away
  34. 1.624 km SE of Tres Pinos, California · 15825 days ago · 9 km deep · 31 km away
  35. 1.628 km ENE of Soledad, California · 15824 days ago · 8 km deep · 39 km away
  36. 1.76 km SSW of Ridgemark, California · 15824 days ago · 10 km deep · 3 km away
  37. 1.56 km ENE of East Foothills, California · 15823 days ago · 6 km deep · 76 km away
  38. 1.733 km W of Three Rocks, California · 15823 days ago · 14 km deep · 68 km away
  39. 1.723 km NNE of San Ardo, California · 15823 days ago · 5 km deep · 87 km away
  40. 1.8Central California · 15822 days ago · 5 km deep · 98 km away
  41. 1.9Northern California · 15822 days ago · 3 km deep · 39 km away
  42. 2.121 km NE of Soledad, California · 15822 days ago · 9 km deep · 36 km away
  43. 2.421 km NE of Soledad, California · 15821 days ago · 2 km deep · 32 km away
  44. 1.922 km ESE of Tres Pinos, California · 15819 days ago · 1 km deep · 30 km away
  45. 2.521 km NE of Soledad, California · 15819 days ago · 6 km deep · 32 km away
  46. 1.86 km SSW of Ridgemark, California · 15819 days ago · 10 km deep · 3 km away
  47. 1.76 km SSW of Ridgemark, California · 15819 days ago · 10 km deep · 3 km away
  48. 2.114 km N of Morgan Hill, California · 15819 days ago · 3 km deep · 57 km away
  49. 1.820 km NW of Diablo Grande, California · 15819 days ago · 2 km deep · 83 km away
  50. 2.230 km NE of Soledad, California · 15819 days ago · 7 km deep · 38 km away
  51. 1.78 km E of San Martin, California · 15818 days ago · 0 km deep · 36 km away
  52. 2.523 km SSW of Three Rocks, California · 15818 days ago · 9 km deep · 94 km away
  53. 2.45 km NE of Morgan Hill, California · 15817 days ago · 4 km deep · 46 km away
  54. 1.96 km SSE of Gilroy, California · 15815 days ago · 5 km deep · 22 km away
  55. 1.922 km ENE of San Lucas, California · 15815 days ago · 5 km deep · 83 km away
  56. 1.710 km SE of Sunol, California · 15815 days ago · 5 km deep · 91 km away
  57. 1.89 km ENE of Morgan Hill, California · 15815 days ago · 6 km deep · 43 km away
  58. 2.39 km SSW of Three Rocks, California · 15814 days ago · 7 km deep · 97 km away
  59. 1.921 km NE of East Foothills, California · 15814 days ago · 5 km deep · 82 km away
  60. 2.12 km WSW of Stevinson, California · 15813 days ago · 0 km deep · 76 km away

The first 60 of 179.

Before

  1. 2.229 km SW of Three Rocks, California · 15837 days ago · 9 km deep · 85 km away
  2. 1.740 km W of Three Rocks, California · 15838 days ago · 11 km deep · 56 km away
  3. 1.721 km SW of Three Rocks, California · 15838 days ago · 16 km deep · 86 km away
  4. 2.023 km ENE of Soledad, California · 15838 days ago · 5 km deep · 42 km away
  5. 1.723 km ENE of Soledad, California · 15838 days ago · 4 km deep · 42 km away
  6. 1.99 km SSW of Tres Pinos, California · 15839 days ago · 2 km deep · 10 km away
  7. 2.29 km SSW of Tres Pinos, California · 15839 days ago · 2 km deep · 10 km away
  8. 2.24 km SSE of San Juan Bautista, California · 15839 days ago · 3 km deep · 10 km away
  9. 1.621 km NE of Soledad, California · 15839 days ago · 4 km deep · 33 km away
  10. 1.68 km ENE of San Martin, California · 15839 days ago · 5 km deep · 38 km away
  11. 1.521 km NE of Soledad, California · 15840 days ago · 6 km deep · 34 km away
  12. 1.924 km NE of San Ardo, California · 15841 days ago · 0 km deep · 87 km away
  13. 1.86 km SE of Alum Rock, California · 15841 days ago · 8 km deep · 68 km away
  14. 3.66 km SE of Alum Rock, California · 15841 days ago · 8 km deep · 68 km away
  15. 1.67 km SE of Alum Rock, California · 15841 days ago · 8 km deep · 68 km away
  16. 2.17 km NE of Hollister, California · 15841 days ago · 6 km deep · 13 km away
  17. 1.924 km NE of Greenfield, California · 15842 days ago · 5 km deep · 46 km away
  18. 2.024 km NE of Greenfield, California · 15842 days ago · 5 km deep · 49 km away
  19. 1.531 km SW of King City, California · 15842 days ago · 3 km deep · 81 km away
  20. 2.923 km NE of Greenfield, California · 15842 days ago · 9 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1095293. Read Thu, Oct 1, 2026, 7:44 AM UTC.