California earthquakes

M1.9 earthquake 5 km SSW of Ridgemark, California

A magnitude 1.9 earthquake struck 5 km SSW of Ridgemark, California on Mon, Nov 19, 1979, 6:43 PM PST (02:43 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.3 21 km NE 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
1.9 (md), micro
Local time
UTC
1979-11-20 02:43:04 UTC
Depth
4.1 km (2.5 mi), shallow
Epicenter
36.773° N, 121.397° 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
±0.14
Depth from
From location
Station coverage gap
33°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.321 km NE of Soledad, California · 17105 days ago · 6 km deep · 30 km away
  2. 1.79 km E of Gilroy, California · 17104 days ago · 8 km deep · 28 km away
  3. 1.96 km S of Tres Pinos, California · 17104 days ago · 4 km deep · 9 km away
  4. 1.98 km NE of Gilroy, California · 17104 days ago · 4 km deep · 33 km away
  5. 2.123 km NNE of San Lucas, California · 17104 days ago · 7 km deep · 68 km away
  6. 1.83 km S of San Juan Bautista, California · 17104 days ago · 6 km deep · 14 km away
  7. 1.911 km NNW of Hollister, California · 17104 days ago · 7 km deep · 21 km away
  8. 2.28 km ENE of King City, California · 17104 days ago · 5 km deep · 66 km away
  9. 1.726 km NE of Soledad, California · 17103 days ago · 8 km deep · 30 km away
  10. 1.69 km E of Gilroy, California · 17103 days ago · 8 km deep · 28 km away
  11. 1.99 km E of Gilroy, California · 17103 days ago · 8 km deep · 28 km away
  12. 1.513 km E of Seven Trees, California · 17102 days ago · 5 km deep · 65 km away
  13. 1.91 km WNW of Cambrian Park, California · 17102 days ago · 5 km deep · 74 km away
  14. 2.420 km SSE of Tres Pinos, California · 17102 days ago · 5 km deep · 23 km away
  15. 2.114 km SSE of Tres Pinos, California · 17101 days ago · 4 km deep · 16 km away
  16. 3.28 km ENE of Gilroy, California · 17100 days ago · 8 km deep · 31 km away
  17. 2.615 km SSE of Tres Pinos, California · 17100 days ago · 7 km deep · 17 km away
  18. 1.69 km NNW of Hollister, California · 17100 days ago · 0 km deep · 18 km away
  19. 1.68 km NE of Gilroy, California · 17100 days ago · 6 km deep · 33 km away
  20. 2.92 km S of San Juan Bautista, California · 17100 days ago · 6 km deep · 14 km away
  21. 1.623 km ENE of San Lucas, California · 17099 days ago · 5 km deep · 82 km away
  22. 2.323 km ENE of San Lucas, California · 17099 days ago · 5 km deep · 82 km away
  23. 2.39 km ENE of Gilroy, California · 17099 days ago · 9 km deep · 31 km away
  24. 2.222 km NE of San Lucas, California · 17099 days ago · 7 km deep · 78 km away
  25. 1.6Central California · 17099 days ago · 4 km deep · 21 km away
  26. 1.812 km S of Tres Pinos, California · 17098 days ago · 2 km deep · 13 km away
  27. 2.221 km NE of Soledad, California · 17098 days ago · 5 km deep · 34 km away
  28. 3.017 km SSE of Tres Pinos, California · 17096 days ago · 7 km deep · 19 km away
  29. 2.617 km SSW of South Dos Palos, California · 17096 days ago · 3 km deep · 60 km away
  30. 1.714 km W of Three Rocks, California · 17096 days ago · 4 km deep · 80 km away
  31. 2.18 km NE of Gilroy, California · 17096 days ago · 4 km deep · 34 km away
  32. 2.622 km NE of Soledad, California · 17096 days ago · 3 km deep · 28 km away
  33. 1.817 km SSE of Tres Pinos, California · 17095 days ago · 6 km deep · 19 km away
  34. 1.721 km NE of Soledad, California · 17094 days ago · 8 km deep · 35 km away
  35. 2.816 km SSE of Tres Pinos, California · 17094 days ago · 7 km deep · 18 km away
  36. 2.618 km SSE of Tres Pinos, California · 17093 days ago · 6 km deep · 20 km away
  37. 1.716 km SSE of Tres Pinos, California · 17093 days ago · 6 km deep · 19 km away
  38. 2.424 km NE of Greenfield, California · 17092 days ago · 5 km deep · 49 km away
  39. 3.09 km NE of San Martin, California · 17092 days ago · 7 km deep · 44 km away
  40. 1.83 km W of Milpitas, California · 17092 days ago · 15 km deep · 87 km away
  41. 1.612 km N of Hollister, California · 17092 days ago · 7 km deep · 22 km away
  42. 2.19 km ENE of Gilroy, California · 17092 days ago · 8 km deep · 31 km away
  43. 2.321 km SSE of Tres Pinos, California · 17091 days ago · 4 km deep · 23 km away
  44. 2.521 km SSE of Tres Pinos, California · 17091 days ago · 4 km deep · 23 km away
  45. 2.521 km SSE of Tres Pinos, California · 17091 days ago · 4 km deep · 24 km away
  46. 2.421 km NNE of Soledad, California · 17091 days ago · 6 km deep · 27 km away
  47. 1.94 km SSE of Sunol, California · 17091 days ago · 8 km deep · 97 km away
  48. 1.83 km W of Hollister, California · 17090 days ago · 4 km deep · 9 km away
  49. 1.66 km ENE of East Foothills, California · 17090 days ago · 6 km deep · 76 km away
  50. 1.69 km ENE of Gilroy, California · 17089 days ago · 8 km deep · 30 km away
  51. 1.92 km WNW of Ridgemark, California · 17089 days ago · 6 km deep · 5 km away
  52. 1.88 km E of Gilroy, California · 17088 days ago · 6 km deep · 26 km away
  53. 3.23 km S of San Juan Bautista, California · 17088 days ago · 7 km deep · 13 km away
  54. 1.68 km ESE of Greenfield, California · 17088 days ago · 7 km deep · 57 km away
  55. 2.623 km NE of Greenfield, California · 17087 days ago · 7 km deep · 46 km away
  56. 1.91 km WSW of Tres Pinos, California · 17087 days ago · 2 km deep · 5 km away
  57. 2.27 km SSW of King City, California · 17086 days ago · 9 km deep · 72 km away
  58. 2.323 km NE of Greenfield, California · 17086 days ago · 7 km deep · 46 km away
  59. 2.19 km ENE of Gilroy, California · 17085 days ago · 9 km deep · 31 km away
  60. 2.09 km NE of Morgan Hill, California · 17085 days ago · 8 km deep · 49 km away

The first 60 of 183.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1048920. Read Tue, Sep 22, 2026, 11:16 AM UTC.