California earthquakes

M2.1 earthquake 7 km WSW of Ridgemark, California

A magnitude 2.1 earthquake struck 7 km WSW of Ridgemark, California on Thu, Apr 15, 1976, 12:12 AM PST (08:12 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M4.6 13 km WSW of Three Rocks, 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1976-04-15 08:12:20 UTC
Depth
7.8 km (4.9 mi), shallow
Epicenter
36.786° N, 121.440° 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 0.3 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.33
Depth from
From location
Station coverage gap
50°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 180 in the 60 days after this one and 124 in the 30 days before it.

After

  1. 3.17 km NE of San Juan Bautista, California · 18433 days ago · 8 km deep · 12 km away
  2. 2.07 km NE of San Juan Bautista, California · 18433 days ago · 10 km deep · 12 km away
  3. 1.623 km ENE of Soledad, California · 18433 days ago · 2 km deep · 46 km away
  4. 2.421 km ENE of San Lucas, California · 18433 days ago · 8 km deep · 83 km away
  5. 3.023 km ENE of San Lucas, California · 18433 days ago · 5 km deep · 85 km away
  6. 2.87 km NNE of Interlaken, California · 18432 days ago · 11 km deep · 35 km away
  7. 2.029 km ENE of Soledad, California · 18432 days ago · 5 km deep · 45 km away
  8. 1.910 km S of Tres Pinos, California · 18432 days ago · 7 km deep · 13 km away
  9. 4.228 km W of Three Rocks, California · 18432 days ago · 11 km deep · 71 km away
  10. 2.329 km W of Three Rocks, California · 18432 days ago · 9 km deep · 70 km away
  11. 1.622 km NNE of Soledad, California · 18431 days ago · 5 km deep · 29 km away
  12. 1.826 km NE of Soledad, California · 18431 days ago · 8 km deep · 40 km away
  13. 2.121 km NE of Soledad, California · 18430 days ago · 2 km deep · 35 km away
  14. 1.7Central California · 18430 days ago · 3 km deep · 13 km away
  15. 1.67 km NNW of Hollister, California · 18429 days ago · 7 km deep · 15 km away
  16. 3.07 km NNW of Hollister, California · 18429 days ago · 7 km deep · 15 km away
  17. 2.27 km WSW of Gilroy, California · 18429 days ago · 5 km deep · 30 km away
  18. 1.821 km SSE of Tres Pinos, California · 18429 days ago · 6 km deep · 27 km away
  19. 2.621 km NE of Soledad, California · 18429 days ago · 7 km deep · 36 km away
  20. 1.616 km E of Seven Trees, California · 18429 days ago · 9 km deep · 58 km away
  21. 3.221 km SSE of Tres Pinos, California · 18429 days ago · 6 km deep · 27 km away
  22. 3.025 km NE of Greenfield, California · 18429 days ago · 1 km deep · 53 km away
  23. 2.610 km NE of Milpitas, California · 18428 days ago · 4 km deep · 87 km away
  24. 2.024 km NE of King City, California · 18428 days ago · 1 km deep · 62 km away
  25. 2.411 km S of Tres Pinos, California · 18428 days ago · 4 km deep · 16 km away
  26. 2.523 km ENE of San Lucas, California · 18428 days ago · 8 km deep · 83 km away
  27. 2.213 km NW of Lockwood, California · 18427 days ago · 8 km deep · 88 km away
  28. 2.46 km NE of East Foothills, California · 18427 days ago · 8 km deep · 76 km away
  29. 2.07 km NNE of San Martin, California · 18427 days ago · 5 km deep · 42 km away
  30. 1.927 km NE of Soledad, California · 18427 days ago · 9 km deep · 41 km away
  31. 3.323 km SW of Three Rocks, California · 18426 days ago · 24 km deep · 87 km away
  32. 1.98 km ENE of Gilroy, California · 18426 days ago · 7 km deep · 28 km away
  33. 2.525 km NE of Soledad, California · 18426 days ago · 7 km deep · 34 km away
  34. 1.517 km E of Tres Pinos, California · 18426 days ago · 5 km deep · 27 km away
  35. 2.917 km SSE of Tres Pinos, California · 18425 days ago · 10 km deep · 23 km away
  36. 1.6Central California · 18424 days ago · 5 km deep · 20 km away
  37. 2.4Central California · 18423 days ago · 9 km deep · 3 km away
  38. 1.94 km WSW of Ridgemark, California · 18423 days ago · 9 km deep · 3 km away
  39. 3.022 km ENE of Soledad, California · 18423 days ago · 2 km deep · 43 km away
  40. 2.68 km ESE of Gilroy, California · 18423 days ago · 4 km deep · 23 km away
  41. 3.728 km SSW of South Dos Palos, California · 18423 days ago · 8 km deep · 59 km away
  42. 2.123 km ENE of Soledad, California · 18422 days ago · 4 km deep · 43 km away
  43. 1.97 km SE of La Honda, California · 18422 days ago · 4 km deep · 87 km away
  44. 1.95 km NE of Ridgemark, California · 18422 days ago · 5 km deep · 13 km away
  45. 2.15 km SSW of Tres Pinos, California · 18422 days ago · 7 km deep · 10 km away
  46. 2.925 km ENE of Greenfield, California · 18421 days ago · 5 km deep · 56 km away
  47. 2.521 km NE of Soledad, California · 18421 days ago · 6 km deep · 32 km away
  48. 1.85 km SSW of Tres Pinos, California · 18421 days ago · 8 km deep · 10 km away
  49. 2.922 km NE of San Lucas, California · 18421 days ago · 7 km deep · 78 km away
  50. 2.024 km E of Tres Pinos, California · 18421 days ago · 0 km deep · 35 km away
  51. 1.620 km ENE of East Foothills, California · 18421 days ago · 8 km deep · 72 km away
  52. 1.63 km E of Aromas, California · 18420 days ago · 7 km deep · 19 km away
  53. 2.37 km NE of Ridgemark, California · 18419 days ago · 5 km deep · 15 km away
  54. 2.021 km NE of Soledad, California · 18418 days ago · 7 km deep · 32 km away
  55. 1.79 km NNW of Hollister, California · 18417 days ago · 4 km deep · 16 km away
  56. 2.011 km SSE of Tres Pinos, California · 18417 days ago · 8 km deep · 18 km away
  57. 2.74 km WSW of Loyola, California · 18416 days ago · 6 km deep · 88 km away
  58. 1.78 km SSW of Tres Pinos, California · 18415 days ago · 3 km deep · 11 km away
  59. 2.321 km ESE of Tres Pinos, California · 18415 days ago · 5 km deep · 32 km away
  60. 2.45 km SSW of Tres Pinos, California · 18415 days ago · 9 km deep · 10 km away

The first 60 of 180.

Before

  1. 2.82 km ESE of Aromas, California · 18433 days ago · 6 km deep · 19 km away
  2. 3.621 km NE of Soledad, California · 18434 days ago · 3 km deep · 35 km away
  3. 2.523 km ENE of Soledad, California · 18434 days ago · 5 km deep · 44 km away
  4. 2.425 km NE of Greenfield, California · 18434 days ago · 7 km deep · 54 km away
  5. 2.221 km NNE of Soledad, California · 18434 days ago · 8 km deep · 29 km away
  6. 2.66 km ENE of Aromas, California · 18435 days ago · 4 km deep · 20 km away
  7. 2.121 km NE of Soledad, California · 18435 days ago · 3 km deep · 32 km away
  8. 2.3Central California · 18435 days ago · 6 km deep · 20 km away
  9. 3.11 km ESE of Aromas, California · 18435 days ago · 8 km deep · 20 km away
  10. 2.17 km WSW of Gilroy, California · 18436 days ago · 4 km deep · 28 km away
  11. 2.522 km ENE of Soledad, California · 18436 days ago · 5 km deep · 44 km away
  12. 2.18 km WSW of Gilroy, California · 18436 days ago · 3 km deep · 27 km away
  13. 1.922 km ENE of Soledad, California · 18437 days ago · 4 km deep · 43 km away
  14. 3.57 km WSW of Gilroy, California · 18437 days ago · 4 km deep · 27 km away
  15. 1.839 km W of Three Rocks, California · 18437 days ago · 11 km deep · 61 km away
  16. 2.031 km NE of Soledad, California · 18437 days ago · 9 km deep · 42 km away
  17. 2.916 km E of Seven Trees, California · 18438 days ago · 7 km deep · 58 km away
  18. 2.424 km NE of Soledad, California · 18438 days ago · 8 km deep · 38 km away
  19. 3.023 km NNE of San Lucas, California · 18438 days ago · 4 km deep · 71 km away
  20. 3.522 km NE of Soledad, California · 18439 days ago · 4 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1029425. Read Sat, Oct 3, 2026, 1:39 PM UTC.