California earthquakes

M2.3 earthquake 7 km NE of Ridgemark, California

A magnitude 2.3 earthquake struck 7 km NE of Ridgemark, California on Thu, Jul 29, 1976, 2:57 PM PDT (21:57 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.0 23 km ENE 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
2.3 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1976-07-29 21:57:23 UTC
Depth
3.3 km (2.0 mi), shallow
Epicenter
36.857° N, 121.308° 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
±0.40
Depth from
From location
Station coverage gap
70°
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 130 in the 30 days before it.

After

  1. 2.07 km SE of Alum Rock, California · 18326 days ago · 3 km deep · 66 km away
  2. 1.923 km ENE of San Lucas, California · 18326 days ago · 7 km deep · 84 km away
  3. 1.721 km NE of Soledad, California · 18326 days ago · 6 km deep · 38 km away
  4. 1.9Central California · 18325 days ago · 8 km deep · 50 km away
  5. 2.621 km NE of Soledad, California · 18325 days ago · 6 km deep · 33 km away
  6. 3.22 km WSW of San Juan Bautista, California · 18325 days ago · 7 km deep · 23 km away
  7. 1.66 km SSW of Ridgemark, California · 18325 days ago · 6 km deep · 14 km away
  8. 2.48 km SE of San Juan Bautista, California · 18324 days ago · 4 km deep · 18 km away
  9. 1.92 km NNE of Aromas, California · 18324 days ago · 5 km deep · 29 km away
  10. 1.718 km SSE of Tres Pinos, California · 18324 days ago · 6 km deep · 25 km away
  11. 1.76 km ENE of San Martin, California · 18323 days ago · 5 km deep · 34 km away
  12. 2.024 km NNE of King City, California · 18323 days ago · 6 km deep · 59 km away
  13. 1.85 km ESE of Aromas, California · 18323 days ago · 6 km deep · 25 km away
  14. 1.85 km ENE of Tres Pinos, California · 18323 days ago · 4 km deep · 7 km away
  15. 3.023 km NE of King City, California · 18322 days ago · 4 km deep · 64 km away
  16. 1.5Central California · 18322 days ago · 3 km deep · 18 km away
  17. 2.521 km NE of Soledad, California · 18322 days ago · 3 km deep · 35 km away
  18. 1.86 km NNE of Morgan Hill, California · 18322 days ago · 4 km deep · 46 km away
  19. 1.812 km N of Morgan Hill, California · 18322 days ago · 7 km deep · 53 km away
  20. 3.025 km WSW of Three Rocks, California · 18321 days ago · 18 km deep · 74 km away
  21. 1.611 km ESE of Tres Pinos, California · 18321 days ago · 10 km deep · 16 km away
  22. 2.67 km ENE of Interlaken, California · 18321 days ago · 3 km deep · 35 km away
  23. 2.424 km NE of Greenfield, California · 18321 days ago · 4 km deep · 48 km away
  24. 2.322 km ENE of Soledad, California · 18320 days ago · 5 km deep · 43 km away
  25. 2.424 km NE of Greenfield, California · 18320 days ago · 3 km deep · 48 km away
  26. 2.222 km NE of San Lucas, California · 18320 days ago · 9 km deep · 76 km away
  27. 3.323 km NE of Greenfield, California · 18320 days ago · 7 km deep · 50 km away
  28. 2.924 km NE of Greenfield, California · 18319 days ago · 8 km deep · 51 km away
  29. 1.65 km N of Morgan Hill, California · 18318 days ago · 1 km deep · 47 km away
  30. 2.26 km SE of Sunol, California · 18318 days ago · 11 km deep · 91 km away
  31. 2.728 km NE of Soledad, California · 18318 days ago · 9 km deep · 37 km away
  32. 1.91 km ENE of Tres Pinos, California · 18317 days ago · 8 km deep · 7 km away
  33. 2.216 km E of Tres Pinos, California · 18316 days ago · 5 km deep · 16 km away
  34. 2.833 km WNW of Three Rocks, California · 18316 days ago · 4 km deep · 58 km away
  35. 2.533 km WNW of Three Rocks, California · 18316 days ago · 4 km deep · 57 km away
  36. 1.89 km NNW of Hollister, California · 18316 days ago · 4 km deep · 16 km away
  37. 2.822 km NE of San Lucas, California · 18316 days ago · 5 km deep · 73 km away
  38. 2.317 km SSE of Tres Pinos, California · 18316 days ago · 4 km deep · 24 km away
  39. 1.933 km WNW of Three Rocks, California · 18316 days ago · 4 km deep · 58 km away
  40. 2.622 km ENE of Soledad, California · 18315 days ago · 10 km deep · 40 km away
  41. 2.735 km ENE of Greenfield, California · 18314 days ago · 10 km deep · 56 km away
  42. 2.621 km NE of Soledad, California · 18314 days ago · 2 km deep · 38 km away
  43. 2.633 km NE of Soledad, California · 18314 days ago · 6 km deep · 39 km away
  44. 3.43 km SSE of Lexington Hills, California · 18314 days ago · 4 km deep · 66 km away
  45. 1.89 km NE of San Martin, California · 18314 days ago · 9 km deep · 38 km away
  46. 3.433 km WNW of Three Rocks, California · 18314 days ago · 4 km deep · 58 km away
  47. 3.812 km NE of San Martin, California · 18313 days ago · 6 km deep · 40 km away
  48. 2.011 km NE of San Martin, California · 18313 days ago · 3 km deep · 40 km away
  49. 2.530 km ENE of Soledad, California · 18313 days ago · 7 km deep · 39 km away
  50. 2.727 km NE of Soledad, California · 18313 days ago · 7 km deep · 36 km away
  51. 3.412 km NE of San Martin, California · 18313 days ago · 4 km deep · 40 km away
  52. 2.311 km NE of San Martin, California · 18313 days ago · 4 km deep · 39 km away
  53. 3.722 km NE of Soledad, California · 18312 days ago · 4 km deep · 34 km away
  54. 1.91 km S of Tres Pinos, California · 18312 days ago · 7 km deep · 9 km away
  55. 3.18 km N of Interlaken, California · 18312 days ago · 10 km deep · 41 km away
  56. 2.427 km NE of Soledad, California · 18312 days ago · 8 km deep · 38 km away
  57. 2.31 km N of Tres Pinos, California · 18312 days ago · 8 km deep · 6 km away
  58. 1.81 km N of Tres Pinos, California · 18312 days ago · 9 km deep · 6 km away
  59. 2.323 km ENE of Soledad, California · 18311 days ago · 5 km deep · 45 km away
  60. 2.418 km SSE of Tres Pinos, California · 18311 days ago · 9 km deep · 25 km away

The first 60 of 190.

Before

  1. 2.221 km NE of Soledad, California · 18327 days ago · 7 km deep · 39 km away
  2. 2.17 km NE of San Martin, California · 18327 days ago · 5 km deep · 39 km away
  3. 2.023 km NE of Soledad, California · 18327 days ago · 8 km deep · 38 km away
  4. 2.11 km ENE of Aromas, California · 18327 days ago · 5 km deep · 29 km away
  5. 1.710 km NNW of Hollister, California · 18328 days ago · 4 km deep · 16 km away
  6. 1.721 km NE of Soledad, California · 18328 days ago · 6 km deep · 37 km away
  7. 2.322 km NE of Soledad, California · 18328 days ago · 10 km deep · 36 km away
  8. 2.821 km NE of Soledad, California · 18328 days ago · 6 km deep · 38 km away
  9. 1.921 km NE of Soledad, California · 18328 days ago · 6 km deep · 37 km away
  10. 2.1Central California · 18328 days ago · 3 km deep · 26 km away
  11. 3.220 km NE of San Ardo, California · 18328 days ago · 3 km deep · 91 km away
  12. 1.73 km SSE of Portola Valley, California · 18329 days ago · 9 km deep · 98 km away
  13. 1.62 km ESE of Tres Pinos, California · 18329 days ago · 6 km deep · 9 km away
  14. 2.926 km WSW of Three Rocks, California · 18329 days ago · 16 km deep · 73 km away
  15. 2.016 km E of Seven Trees, California · 18329 days ago · 6 km deep · 56 km away
  16. 1.84 km SE of Tres Pinos, California · 18329 days ago · 7 km deep · 11 km away
  17. 3.721 km NE of Soledad, California · 18330 days ago · 5 km deep · 38 km away
  18. 2.821 km NE of Soledad, California · 18330 days ago · 5 km deep · 38 km away
  19. 2.521 km ENE of San Lucas, California · 18331 days ago · 7 km deep · 85 km away
  20. 2.02 km SSW of San Juan Bautista, California · 18331 days ago · 5 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1030680. Read Fri, Oct 2, 2026, 7:17 AM UTC.