California earthquakes

M2.3 earthquake 13 km SSE of Tres Pinos, California

A magnitude 2.3 earthquake struck 13 km SSE of Tres Pinos, California on Sun, Dec 28, 1975, 10:20 AM PST (18:20 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.5 1 km SSE of Monterey, 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
2.3 (md), micro
Local time
UTC
1975-12-28 18:20:03 UTC
Depth
5.1 km (3.2 mi), shallow
Epicenter
36.672° N, 121.272° 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, 0.6 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
52°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.82 km WSW of Monterey, California · 18515 days ago · 7 km deep · 58 km away
  2. 2.018 km SSE of Tres Pinos, California · 18515 days ago · 6 km deep · 4 km away
  3. 2.213 km SSE of Tres Pinos, California · 18515 days ago · 5 km deep · 0 km away
  4. 2.31 km ESE of Monterey, California · 18515 days ago · 3 km deep · 55 km away
  5. 1.71 km E of Del Monte Forest, California · 18515 days ago · 7 km deep · 59 km away
  6. 2.51 km SSE of Monterey, California · 18514 days ago · 5 km deep · 56 km away
  7. 2.11 km SSE of Monterey, California · 18514 days ago · 7 km deep · 56 km away
  8. 1.621 km NE of Soledad, California · 18514 days ago · 7 km deep · 19 km away
  9. 2.34 km ESE of Interlaken, California · 18514 days ago · 11 km deep · 47 km away
  10. 2.32 km WSW of Ridgemark, California · 18514 days ago · 7 km deep · 18 km away
  11. 2.08 km NNW of Hollister, California · 18514 days ago · 8 km deep · 32 km away
  12. 2.218 km NE of East Foothills, California · 18514 days ago · 7 km deep · 97 km away
  13. 2.02 km ENE of Del Monte Forest, California · 18514 days ago · 5 km deep · 59 km away
  14. 1.68 km NE of San Juan Bautista, California · 18513 days ago · 3 km deep · 32 km away
  15. 3.121 km NE of Soledad, California · 18513 days ago · 2 km deep · 14 km away
  16. 2.318 km W of Volta, California · 18513 days ago · 7 km deep · 46 km away
  17. 1.92 km SW of Monterey, California · 18512 days ago · 6 km deep · 58 km away
  18. 1.81 km ENE of Del Monte Forest, California · 18512 days ago · 7 km deep · 60 km away
  19. 1.92 km S of Ridgemark, California · 18512 days ago · 5 km deep · 15 km away
  20. 2.621 km NE of Soledad, California · 18512 days ago · 2 km deep · 16 km away
  21. 2.44 km ESE of Interlaken, California · 18512 days ago · 10 km deep · 47 km away
  22. 1.817 km E of Tres Pinos, California · 18511 days ago · 4 km deep · 20 km away
  23. 2.224 km ENE of Soledad, California · 18511 days ago · 5 km deep · 23 km away
  24. 1.835 km WSW of King City, California · 18511 days ago · 13 km deep · 70 km away
  25. 1.518 km NE of East Foothills, California · 18511 days ago · 9 km deep · 97 km away
  26. 2.022 km ENE of Soledad, California · 18511 days ago · 4 km deep · 24 km away
  27. 2.124 km NE of Greenfield, California · 18510 days ago · 4 km deep · 28 km away
  28. 2.51 km SSW of Hollister, California · 18510 days ago · 8 km deep · 22 km away
  29. 2.015 km NW of Parkfield, California · 18510 days ago · 6 km deep · 99 km away
  30. 1.827 km NE of Soledad, California · 18510 days ago · 9 km deep · 20 km away
  31. 2.727 km NNE of Hollister, California · 18510 days ago · 5 km deep · 44 km away
  32. 2.82 km SSW of Hollister, California · 18509 days ago · 8 km deep · 22 km away
  33. 1.82 km SSW of Monterey, California · 18509 days ago · 5 km deep · 57 km away
  34. 2.514 km N of Morgan Hill, California · 18509 days ago · 6 km deep · 73 km away
  35. 2.038 km NE of King City, California · 18508 days ago · 19 km deep · 45 km away
  36. 1.910 km NNW of Hollister, California · 18508 days ago · 5 km deep · 34 km away
  37. 1.69 km NE of San Juan Bautista, California · 18508 days ago · 4 km deep · 32 km away
  38. 1.77 km ENE of Morgan Hill, California · 18507 days ago · 4 km deep · 60 km away
  39. 2.625 km ENE of Greenfield, California · 18507 days ago · 1 km deep · 37 km away
  40. 2.825 km NE of Greenfield, California · 18507 days ago · 2 km deep · 34 km away
  41. 2.322 km ENE of Soledad, California · 18507 days ago · 4 km deep · 24 km away
  42. 2.217 km NW of Parkfield, California · 18507 days ago · 5 km deep · 96 km away
  43. 2.78 km NE of San Martin, California · 18506 days ago · 7 km deep · 56 km away
  44. 2.57 km NNW of Morgan Hill, California · 18506 days ago · 5 km deep · 68 km away
  45. 1.923 km NE of San Lucas, California · 18506 days ago · 6 km deep · 63 km away
  46. 2.324 km ENE of Soledad, California · 18506 days ago · 8 km deep · 22 km away
  47. 2.425 km ENE of Greenfield, California · 18505 days ago · 5 km deep · 38 km away
  48. 2.224 km ENE of Soledad, California · 18505 days ago · 2 km deep · 27 km away
  49. 2.310 km N of Hollister, California · 18505 days ago · 9 km deep · 32 km away
  50. 2.79 km NE of San Juan Bautista, California · 18505 days ago · 5 km deep · 32 km away
  51. 1.923 km ENE of Soledad, California · 18504 days ago · 5 km deep · 27 km away
  52. 2.48 km WSW of San Ardo, California · 18504 days ago · 14 km deep · 79 km away
  53. 2.87 km SSE of Gilroy, California · 18504 days ago · 5 km deep · 39 km away
  54. 1.626 km NE of Soledad, California · 18503 days ago · 7 km deep · 15 km away
  55. 1.718 km NE of East Foothills, California · 18503 days ago · 9 km deep · 97 km away
  56. 1.726 km NE of Soledad, California · 18503 days ago · 6 km deep · 17 km away
  57. 2.022 km NE of San Lucas, California · 18502 days ago · 6 km deep · 57 km away
  58. 2.222 km SE of Tres Pinos, California · 18502 days ago · 8 km deep · 10 km away
  59. 2.18 km SSW of Tres Pinos, California · 18502 days ago · 2 km deep · 9 km away
  60. 2.626 km NE of Hollister, California · 18502 days ago · 7 km deep · 41 km away

The first 60 of 190.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1028126. Read Tue, Sep 22, 2026, 11:23 AM UTC.