California earthquakes

M1.9 earthquake 5 km NNE of Ridgemark, California

A magnitude 1.9 earthquake struck 5 km NNE of Ridgemark, California on Wed, Mar 6, 1974, 9:37 PM PDT (04:37 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.4 26 km NE of Greenfield, 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1974-03-07 04:37:00 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
36.858° N, 121.339° 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, 0.7 km in depth
Magnitude uncertainty
±0.55
Depth from
From location
Station coverage gap
62°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 173 in the 30 days before it.

After

  1. 2.9Northern California · 19203 days ago · 2 km deep · 38 km away
  2. 1.98 km NE of Gilroy, California · 19203 days ago · 4 km deep · 26 km away
  3. 3.85 km SSW of Gilroy, California · 19203 days ago · 6 km deep · 24 km away
  4. 3.131 km W of Three Rocks, California · 19203 days ago · 13 km deep · 69 km away
  5. 1.714 km N of Morgan Hill, California · 19203 days ago · 2 km deep · 52 km away
  6. 1.75 km S of Gilroy, California · 19203 days ago · 4 km deep · 23 km away
  7. 2.526 km NE of San Lucas, California · 19203 days ago · 10 km deep · 75 km away
  8. 2.321 km NE of Soledad, California · 19202 days ago · 5 km deep · 34 km away
  9. 2.627 km NE of Soledad, California · 19202 days ago · 8 km deep · 39 km away
  10. 3.316 km SSE of Tres Pinos, California · 19202 days ago · 3 km deep · 24 km away
  11. 3.316 km SSE of Tres Pinos, California · 19202 days ago · 3 km deep · 24 km away
  12. 4.016 km SSE of Tres Pinos, California · 19202 days ago · 3 km deep · 24 km away
  13. 2.129 km SE of Tres Pinos, California · 19201 days ago · 7 km deep · 36 km away
  14. 1.94 km E of Interlaken, California · 19201 days ago · 7 km deep · 33 km away
  15. 2.024 km NE of Greenfield, California · 19201 days ago · 5 km deep · 50 km away
  16. 2.225 km ENE of Greenfield, California · 19200 days ago · 4 km deep · 54 km away
  17. 2.921 km NE of Soledad, California · 19200 days ago · 4 km deep · 34 km away
  18. 3.122 km NE of Soledad, California · 19200 days ago · 5 km deep · 34 km away
  19. 2.27 km S of Tres Pinos, California · 19200 days ago · 15 km deep · 15 km away
  20. 2.77 km ENE of Gilroy, California · 19200 days ago · 6 km deep · 23 km away
  21. 3.24 km ENE of Tres Pinos, California · 19200 days ago · 4 km deep · 9 km away
  22. 3.016 km N of Morgan Hill, California · 19199 days ago · 9 km deep · 54 km away
  23. 1.92 km SW of San Juan Bautista, California · 19199 days ago · 7 km deep · 20 km away
  24. 3.724 km ENE of Greenfield, California · 19199 days ago · 6 km deep · 58 km away
  25. 2.223 km ENE of Soledad, California · 19199 days ago · 4 km deep · 46 km away
  26. 2.123 km ENE of Soledad, California · 19199 days ago · 4 km deep · 46 km away
  27. 2.424 km ENE of Greenfield, California · 19199 days ago · 5 km deep · 58 km away
  28. 2.06 km ENE of Hollister, California · 19199 days ago · 4 km deep · 2 km away
  29. 1.818 km SSE of Tres Pinos, California · 19198 days ago · 8 km deep · 27 km away
  30. 2.36 km NE of San Martin, California · 19198 days ago · 2 km deep · 35 km away
  31. 2.013 km ENE of Hollister, California · 19198 days ago · 5 km deep · 8 km away
  32. 3.62 km NE of La Honda, California · 19198 days ago · 10 km deep · 97 km away
  33. 1.57 km NNE of Interlaken, California · 19198 days ago · 6 km deep · 37 km away
  34. 1.57 km E of Gilroy, California · 19198 days ago · 4 km deep · 21 km away
  35. 1.828 km NE of Soledad, California · 19198 days ago · 6 km deep · 37 km away
  36. 3.5Central California · 19197 days ago · 3 km deep · 34 km away
  37. 2.35 km S of Gilroy, California · 19197 days ago · 6 km deep · 24 km away
  38. 2.614 km S of Tres Pinos, California · 19196 days ago · 8 km deep · 23 km away
  39. 1.65 km NE of San Martin, California · 19196 days ago · 4 km deep · 36 km away
  40. 2.824 km ENE of Soledad, California · 19196 days ago · 4 km deep · 46 km away
  41. 2.121 km NE of Soledad, California · 19196 days ago · 5 km deep · 35 km away
  42. 1.843 km SSW of South Dos Palos, California · 19196 days ago · 3 km deep · 50 km away
  43. 3.321 km NE of Soledad, California · 19196 days ago · 7 km deep · 39 km away
  44. 1.68 km E of Gilroy, California · 19196 days ago · 4 km deep · 20 km away
  45. 1.917 km WSW of Volta, California · 19194 days ago · 10 km deep · 28 km away
  46. 2.121 km NE of Soledad, California · 19194 days ago · 4 km deep · 34 km away
  47. 2.412 km NE of Hollister, California · 19194 days ago · 7 km deep · 9 km away
  48. 3.38 km N of Interlaken, California · 19194 days ago · 10 km deep · 39 km away
  49. 3.821 km NE of Soledad, California · 19193 days ago · 2 km deep · 37 km away
  50. 2.37 km N of Interlaken, California · 19193 days ago · 9 km deep · 38 km away
  51. 1.84 km ESE of Aromas, California · 19193 days ago · 4 km deep · 23 km away
  52. 2.526 km NE of Soledad, California · 19193 days ago · 6 km deep · 36 km away
  53. 2.77 km NNE of Interlaken, California · 19193 days ago · 9 km deep · 38 km away
  54. 1.822 km ENE of San Lucas, California · 19193 days ago · 6 km deep · 84 km away
  55. 3.019 km W of Three Rocks, California · 19193 days ago · 14 km deep · 77 km away
  56. 2.917 km WSW of Volta, California · 19193 days ago · 8 km deep · 28 km away
  57. 2.127 km NE of Soledad, California · 19193 days ago · 9 km deep · 39 km away
  58. 1.610 km NNE of San Juan Bautista, California · 19193 days ago · 4 km deep · 15 km away
  59. 2.19 km NW of Hollister, California · 19193 days ago · 3 km deep · 13 km away
  60. 2.420 km NNE of Soledad, California · 19193 days ago · 6 km deep · 31 km away

The first 60 of 194.

Before

  1. 1.526 km SE of Tres Pinos, California · 19203 days ago · 9 km deep · 33 km away
  2. 1.623 km ENE of Soledad, California · 19204 days ago · 2 km deep · 46 km away
  3. 2.35 km SSW of Gilroy, California · 19204 days ago · 5 km deep · 25 km away
  4. 1.821 km NE of Soledad, California · 19204 days ago · 5 km deep · 40 km away
  5. 1.511 km S of Tres Pinos, California · 19204 days ago · 5 km deep · 19 km away
  6. 1.8Central California · 19204 days ago · 6 km deep · 40 km away
  7. 1.58 km ESE of East Foothills, California · 19205 days ago · 2 km deep · 65 km away
  8. 2.89 km NNE of Morgan Hill, California · 19205 days ago · 4 km deep · 45 km away
  9. 2.523 km ENE of Soledad, California · 19206 days ago · 4 km deep · 46 km away
  10. 2.523 km ENE of Soledad, California · 19206 days ago · 4 km deep · 46 km away
  11. 2.422 km NNE of Soledad, California · 19206 days ago · 9 km deep · 30 km away
  12. 1.6Central California · 19206 days ago · 14 km deep · 14 km away
  13. 2.611 km NE of Tres Pinos, California · 19206 days ago · 5 km deep · 10 km away
  14. 1.721 km NE of Soledad, California · 19206 days ago · 7 km deep · 39 km away
  15. 2.9Central California · 19206 days ago · 7 km deep · 39 km away
  16. 1.74 km E of Interlaken, California · 19206 days ago · 9 km deep · 32 km away
  17. 1.94 km SSW of Gilroy, California · 19206 days ago · 5 km deep · 25 km away
  18. 3.023 km ENE of Greenfield, California · 19206 days ago · -1 km deep · 56 km away
  19. 2.222 km NE of Soledad, California · 19206 days ago · 9 km deep · 39 km away
  20. 1.67 km S of Tres Pinos, California · 19206 days ago · 14 km deep · 15 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1018921. Read Sat, Oct 3, 2026, 10:15 AM UTC.