California earthquakes

M1.8 earthquake 21 km NE of Soledad, California

A magnitude 1.8 earthquake struck 21 km NE of Soledad, California on Sun, Oct 16, 1977, 9:23 AM PDT (16:23 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.0 15 km N of Morgan Hill, California. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1977-10-16 16:23:51 UTC
Depth
3.2 km (2.0 mi), shallow
Epicenter
36.566° N, 121.160° 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
±0.17
Depth from
From location
Station coverage gap
58°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 185 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.015 km N of Morgan Hill, California · 17868 days ago · 7 km deep · 90 km away
  2. 1.816 km NW of Parkfield, California · 17868 days ago · 4 km deep · 83 km away
  3. 1.616 km NW of Parkfield, California · 17868 days ago · 3 km deep · 83 km away
  4. 1.624 km NE of Greenfield, California · 17868 days ago · 6 km deep · 14 km away
  5. 1.629 km WNW of Coalinga, California · 17867 days ago · 9 km deep · 58 km away
  6. 1.66 km ENE of Coalinga, California · 17867 days ago · 12 km deep · 90 km away
  7. 2.03 km WNW of San Ardo, California · 17866 days ago · 11 km deep · 62 km away
  8. 2.115 km SSE of Tres Pinos, California · 17865 days ago · 3 km deep · 14 km away
  9. 3.115 km SSE of Tres Pinos, California · 17865 days ago · 3 km deep · 14 km away
  10. 2.88 km NW of Hollister, California · 17863 days ago · 8 km deep · 47 km away
  11. 1.914 km E of Seven Trees, California · 17863 days ago · 3 km deep · 92 km away
  12. 1.715 km E of Seven Trees, California · 17863 days ago · 3 km deep · 92 km away
  13. 2.16 km SSE of San Juan Bautista, California · 17863 days ago · 8 km deep · 41 km away
  14. 1.727 km ENE of Soledad, California · 17862 days ago · 9 km deep · 8 km away
  15. 2.218 km E of Tres Pinos, California · 17861 days ago · 0 km deep · 23 km away
  16. 3.321 km NE of Soledad, California · 17861 days ago · 5 km deep · 2 km away
  17. 2.414 km SSE of Tres Pinos, California · 17861 days ago · 4 km deep · 15 km away
  18. 1.614 km SSE of Tres Pinos, California · 17861 days ago · 3 km deep · 15 km away
  19. 1.912 km S of Tres Pinos, California · 17861 days ago · 3 km deep · 18 km away
  20. 1.73 km SE of San Ardo, California · 17861 days ago · 13 km deep · 68 km away
  21. 2.19 km S of Tres Pinos, California · 17860 days ago · 2 km deep · 22 km away
  22. 1.82 km WSW of San Juan Bautista, California · 17860 days ago · 3 km deep · 47 km away
  23. 1.719 km SSE of Tres Pinos, California · 17860 days ago · 10 km deep · 10 km away
  24. 1.622 km NE of San Lucas, California · 17859 days ago · 5 km deep · 40 km away
  25. 2.215 km SSE of Tres Pinos, California · 17859 days ago · 3 km deep · 14 km away
  26. 2.123 km ENE of Soledad, California · 17859 days ago · 3 km deep · 11 km away
  27. 2.521 km NW of Parkfield, California · 17859 days ago · 4 km deep · 77 km away
  28. 2.321 km NE of Soledad, California · 17858 days ago · 2 km deep · 3 km away
  29. 1.917 km N of San Simeon, California · 17858 days ago · 11 km deep · 85 km away
  30. 1.923 km ENE of Soledad, California · 17858 days ago · 5 km deep · 10 km away
  31. 1.625 km ENE of Greenfield, California · 17857 days ago · 5 km deep · 23 km away
  32. 1.518 km NW of Parkfield, California · 17857 days ago · 3 km deep · 81 km away
  33. 1.724 km ENE of Soledad, California · 17857 days ago · 4 km deep · 11 km away
  34. 2.67 km NNE of Interlaken, California · 17856 days ago · 9 km deep · 70 km away
  35. 1.623 km NE of Greenfield, California · 17856 days ago · 5 km deep · 15 km away
  36. 2.410 km S of Tres Pinos, California · 17856 days ago · 5 km deep · 22 km away
  37. 2.122 km NW of Coalinga, California · 17856 days ago · 8 km deep · 64 km away
  38. 3.317 km SW of Lockwood, California · 17855 days ago · 11 km deep · 81 km away
  39. 1.524 km NW of Parkfield, California · 17855 days ago · 4 km deep · 75 km away
  40. 1.912 km N of Morgan Hill, California · 17855 days ago · 4 km deep · 87 km away
  41. 2.924 km ENE of Greenfield, California · 17855 days ago · 7 km deep · 21 km away
  42. 1.626 km ENE of Greenfield, California · 17855 days ago · 7 km deep · 22 km away
  43. 3.025 km ENE of Greenfield, California · 17855 days ago · 7 km deep · 21 km away
  44. 2.025 km ENE of Greenfield, California · 17855 days ago · 6 km deep · 21 km away
  45. 1.825 km ENE of Greenfield, California · 17855 days ago · 7 km deep · 21 km away
  46. 1.825 km ENE of Greenfield, California · 17855 days ago · 6 km deep · 21 km away
  47. 1.625 km ENE of Greenfield, California · 17855 days ago · 6 km deep · 21 km away
  48. 1.99 km NW of Hollister, California · 17854 days ago · 7 km deep · 47 km away
  49. 2.425 km ENE of Greenfield, California · 17854 days ago · 7 km deep · 21 km away
  50. 1.523 km ENE of Soledad, California · 17854 days ago · 5 km deep · 9 km away
  51. 2.232 km WSW of Three Rocks, California · 17854 days ago · 11 km deep · 47 km away
  52. 2.622 km NE of Soledad, California · 17854 days ago · 6 km deep · 3 km away
  53. 1.521 km NE of Soledad, California · 17854 days ago · 6 km deep · 3 km away
  54. 3.322 km NE of Soledad, California · 17854 days ago · 6 km deep · 4 km away
  55. 3.421 km NE of Soledad, California · 17854 days ago · 6 km deep · 3 km away
  56. 3.418 km NNE of Soledad, California · 17854 days ago · 7 km deep · 5 km away
  57. 1.921 km NE of Soledad, California · 17854 days ago · 6 km deep · 4 km away
  58. 1.621 km NE of Soledad, California · 17854 days ago · 6 km deep · 1 km away
  59. 1.621 km NE of Soledad, California · 17854 days ago · 6 km deep · 3 km away
  60. 2.421 km NE of Soledad, California · 17854 days ago · 6 km deep · 2 km away

The first 60 of 185.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1037292. Read Tue, Sep 22, 2026, 11:24 AM UTC.