California earthquakes

M3.0 earthquake 10 km WSW of Ridgemark, California

A magnitude 3.0 earthquake struck 10 km WSW of Ridgemark, California on Tue, Sep 21, 1976, 4:23 PM PDT (23:23 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.8 3 km W of San Juan Bautista, 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
3.0 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1976-09-21 23:23:08 UTC
Depth
6.4 km (4.0 mi), shallow
Epicenter
36.766° N, 121.467° 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, 0.4 km in depth
Magnitude uncertainty
±0.27
Depth from
From location
Station coverage gap
52°
Stations used
53

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 176 in the 60 days after this one and 135 in the 30 days before it.

After

  1. 2.6Central California · 18272 days ago · 8 km deep · 78 km away
  2. 2.310 km NNW of Hollister, California · 18271 days ago · 4 km deep · 18 km away
  3. 3.09 km S of Tres Pinos, California · 18271 days ago · 8 km deep · 16 km away
  4. 1.821 km NE of Soledad, California · 18271 days ago · 5 km deep · 33 km away
  5. 1.719 km SSE of Tres Pinos, California · 18270 days ago · 4 km deep · 25 km away
  6. 2.228 km NE of Soledad, California · 18270 days ago · 5 km deep · 41 km away
  7. 1.916 km SW of Los Banos, California · 18269 days ago · 2 km deep · 49 km away
  8. 1.62 km NE of Monte Sereno, California · 18269 days ago · 6 km deep · 70 km away
  9. 3.17 km NE of Hollister, California · 18268 days ago · 6 km deep · 18 km away
  10. 2.613 km S of South Dos Palos, California · 18268 days ago · 0 km deep · 71 km away
  11. 2.918 km SSE of Tres Pinos, California · 18268 days ago · 5 km deep · 25 km away
  12. 1.6Central California · 18268 days ago · 5 km deep · 18 km away
  13. 2.718 km SSE of Tres Pinos, California · 18268 days ago · 4 km deep · 25 km away
  14. 2.77 km ENE of Hollister, California · 18268 days ago · 5 km deep · 18 km away
  15. 1.87 km WSW of Gilroy, California · 18267 days ago · 6 km deep · 28 km away
  16. 1.99 km NNW of Hollister, California · 18267 days ago · 4 km deep · 18 km away
  17. 1.810 km NNW of Hollister, California · 18267 days ago · 4 km deep · 20 km away
  18. 2.423 km ENE of Soledad, California · 18267 days ago · 5 km deep · 45 km away
  19. 2.25 km SW of Gonzales, California · 18267 days ago · 11 km deep · 33 km away
  20. 2.324 km ENE of Soledad, California · 18267 days ago · 3 km deep · 46 km away
  21. 2.35 km ENE of Interlaken, California · 18267 days ago · 11 km deep · 29 km away
  22. 1.710 km SE of Livermore, California · 18267 days ago · 8 km deep · 96 km away
  23. 1.811 km S of Tres Pinos, California · 18266 days ago · 8 km deep · 15 km away
  24. 2.418 km SSE of Tres Pinos, California · 18266 days ago · 3 km deep · 24 km away
  25. 2.521 km NE of Soledad, California · 18266 days ago · 3 km deep · 35 km away
  26. 2.32 km NE of Interlaken, California · 18265 days ago · 12 km deep · 31 km away
  27. 2.623 km NNE of San Ardo, California · 18265 days ago · 7 km deep · 89 km away
  28. 2.824 km ENE of Soledad, California · 18265 days ago · 4 km deep · 46 km away
  29. 2.025 km NE of Soledad, California · 18264 days ago · 7 km deep · 39 km away
  30. 2.622 km ENE of Soledad, California · 18264 days ago · 3 km deep · 40 km away
  31. 2.216 km SSE of Tres Pinos, California · 18264 days ago · 6 km deep · 22 km away
  32. 2.119 km ENE of East Foothills, California · 18264 days ago · 8 km deep · 76 km away
  33. 1.713 km N of Morgan Hill, California · 18264 days ago · 7 km deep · 56 km away
  34. 2.425 km NNE of King City, California · 18264 days ago · 1 km deep · 59 km away
  35. 1.82 km E of Aromas, California · 18264 days ago · 4 km deep · 19 km away
  36. 1.625 km SE of Tres Pinos, California · 18263 days ago · 5 km deep · 33 km away
  37. 1.96 km ENE of Interlaken, California · 18263 days ago · 10 km deep · 29 km away
  38. 3.126 km NE of Soledad, California · 18262 days ago · 7 km deep · 40 km away
  39. 3.011 km S of Tres Pinos, California · 18262 days ago · 2 km deep · 16 km away
  40. 2.17 km NNE of Interlaken, California · 18262 days ago · 6 km deep · 35 km away
  41. 2.17 km NNE of Interlaken, California · 18261 days ago · 6 km deep · 35 km away
  42. 2.05 km NNE of Tres Pinos, California · 18261 days ago · 6 km deep · 16 km away
  43. 2.13 km SSW of Los Altos Hills, California · 18260 days ago · 5 km deep · 89 km away
  44. 2.23 km SSW of Los Altos Hills, California · 18260 days ago · 6 km deep · 89 km away
  45. 2.04 km SE of Tres Pinos, California · 18260 days ago · 9 km deep · 17 km away
  46. 1.930 km SSW of South Dos Palos, California · 18260 days ago · 11 km deep · 59 km away
  47. 2.923 km NE of King City, California · 18259 days ago · 6 km deep · 63 km away
  48. 1.65 km NE of East Foothills, California · 18259 days ago · 3 km deep · 78 km away
  49. 1.922 km ESE of Tres Pinos, California · 18259 days ago · 5 km deep · 35 km away
  50. 1.78 km NE of Ridgemark, California · 18258 days ago · 3 km deep · 19 km away
  51. 2.16 km S of Volta, California · 18258 days ago · 10 km deep · 56 km away
  52. 2.09 km NW of Hollister, California · 18258 days ago · 4 km deep · 17 km away
  53. 3.313 km S of Tracy, California · 18258 days ago · 3 km deep · 95 km away
  54. 1.96 km SE of Lexington Hills, California · 18258 days ago · 12 km deep · 56 km away
  55. 1.68 km S of Livermore, California · 18257 days ago · 5 km deep · 98 km away
  56. 1.87 km NNE of Interlaken, California · 18256 days ago · 5 km deep · 36 km away
  57. 2.321 km NE of Soledad, California · 18256 days ago · 5 km deep · 33 km away
  58. 3.424 km NE of Greenfield, California · 18256 days ago · 5 km deep · 50 km away
  59. 2.4Central California · 18256 days ago · 5 km deep · 23 km away
  60. 1.77 km NNE of Interlaken, California · 18255 days ago · 6 km deep · 35 km away

The first 60 of 176.

Before

  1. 1.66 km ENE of Interlaken, California · 18273 days ago · 9 km deep · 29 km away
  2. 1.6Central California · 18273 days ago · 9 km deep · 29 km away
  3. 2.212 km NNW of Hollister, California · 18275 days ago · 7 km deep · 21 km away
  4. 1.812 km SSE of Tres Pinos, California · 18276 days ago · 4 km deep · 20 km away
  5. 2.324 km ENE of Greenfield, California · 18276 days ago · 3 km deep · 54 km away
  6. 1.925 km ENE of Greenfield, California · 18276 days ago · 2 km deep · 54 km away
  7. 2.112 km S of Tres Pinos, California · 18276 days ago · 8 km deep · 16 km away
  8. 1.79 km SSW of Tres Pinos, California · 18277 days ago · 2 km deep · 11 km away
  9. 2.114 km E of Seven Trees, California · 18277 days ago · 3 km deep · 62 km away
  10. 2.814 km E of Seven Trees, California · 18277 days ago · 3 km deep · 61 km away
  11. 1.814 km S of Tres Pinos, California · 18278 days ago · 3 km deep · 20 km away
  12. 2.06 km ESE of East Foothills, California · 18278 days ago · 0 km deep · 70 km away
  13. 3.16 km ESE of East Foothills, California · 18278 days ago · 0 km deep · 70 km away
  14. 1.8Northern California · 18278 days ago · 1 km deep · 71 km away
  15. 2.68 km ESE of East Foothills, California · 18278 days ago · 0 km deep · 70 km away
  16. 2.56 km ESE of East Foothills, California · 18278 days ago · 0 km deep · 70 km away
  17. 1.76 km NW of Hollister, California · 18278 days ago · 6 km deep · 15 km away
  18. 2.08 km NE of San Juan Bautista, California · 18279 days ago · 5 km deep · 16 km away
  19. 2.622 km NE of San Lucas, California · 18279 days ago · 6 km deep · 78 km away
  20. 2.222 km NE of San Lucas, California · 18279 days ago · 6 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1031621. Read Fri, Oct 2, 2026, 3:03 PM UTC.