California earthquakes

M2.7 earthquake 4 km NNE of Ripon, California

A magnitude 2.7 earthquake struck 4 km NNE of Ripon, California on Sun, Dec 22, 1985, 6:11 PM PST (02:11 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.0 18 km WSW of Volta, California. This one was a foreshock.

Ripon 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
2.7 (md), micro
Local time
UTC
1985-12-23 02:11:37 UTC
Depth
1.6 km (1.0 mi), shallow
Epicenter
37.780° N, 121.096° 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 4.0 km horizontally, 7.6 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
287°, poorly surrounded by stations
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 110 in the 60 days after this one and 54 in the 30 days before it.

After

  1. 1.88 km E of Greeley Hill, California · 14884 days ago · 0 km deep · 94 km away
  2. 2.613 km N of Hollister, California · 14882 days ago · 6 km deep · 93 km away
  3. 2.36 km ESE of Greeley Hill, California · 14881 days ago · 21 km deep · 92 km away
  4. 3.018 km WSW of Volta, California · 14881 days ago · 3 km deep · 80 km away
  5. 1.512 km N of Morgan Hill, California · 14879 days ago · 6 km deep · 76 km away
  6. 3.00 km S of Concord, California · 14879 days ago · 16 km deep · 85 km away
  7. 1.918 km WSW of Volta, California · 14879 days ago · 2 km deep · 80 km away
  8. 2.30 km SE of Concord, California · 14879 days ago · 14 km deep · 84 km away
  9. 1.88 km ESE of Greeley Hill, California · 14878 days ago · 28 km deep · 93 km away
  10. 2.33 km NNE of Grayson, California · 14876 days ago · 8 km deep · 21 km away
  11. 1.814 km E of Seven Trees, California · 14876 days ago · 3 km deep · 74 km away
  12. 1.714 km E of Seven Trees, California · 14876 days ago · 3 km deep · 74 km away
  13. 2.57 km E of East Foothills, California · 14876 days ago · 3 km deep · 73 km away
  14. 1.516 km E of Seven Trees, California · 14875 days ago · 6 km deep · 74 km away
  15. 2.06 km E of East Foothills, California · 14874 days ago · 9 km deep · 72 km away
  16. 1.513 km ESE of Alum Rock, California · 14874 days ago · 2 km deep · 74 km away
  17. 2.69 km ESE of East Foothills, California · 14874 days ago · 8 km deep · 72 km away
  18. 1.78 km ESE of East Foothills, California · 14874 days ago · 8 km deep · 72 km away
  19. 2.13 km ESE of Diablo Grande, California · 14874 days ago · 2 km deep · 46 km away
  20. 2.11 km E of Pacheco, California · 14872 days ago · 21 km deep · 87 km away
  21. 2.713 km N of Morgan Hill, California · 14871 days ago · 5 km deep · 76 km away
  22. 1.714 km N of Morgan Hill, California · 14871 days ago · 6 km deep · 75 km away
  23. 2.014 km N of Morgan Hill, California · 14871 days ago · 3 km deep · 75 km away
  24. 3.79 km E of Gilroy, California · 14870 days ago · 9 km deep · 91 km away
  25. 1.92 km W of Country Club, California · 14869 days ago · 16 km deep · 32 km away
  26. 1.715 km W of Volta, CA · 14869 days ago · 3 km deep · 76 km away
  27. 1.916 km NE of East Foothills, California · 14867 days ago · 7 km deep · 62 km away
  28. 1.67 km SSW of Sunol, California · 14867 days ago · 6 km deep · 76 km away
  29. 1.72 km N of San Martin, California · 14865 days ago · 4 km deep · 87 km away
  30. 1.914 km NNE of East Foothills, California · 14864 days ago · 6 km deep · 65 km away
  31. 2.813 km ESE of Alum Rock, California · 14864 days ago · 7 km deep · 73 km away
  32. 1.614 km E of Seven Trees, California · 14864 days ago · 2 km deep · 75 km away
  33. 1.921 km SW of Diablo Grande, California · 14864 days ago · 4 km deep · 65 km away
  34. 1.82 km SSW of Morgan Hill, California · 14863 days ago · 16 km deep · 90 km away
  35. 2.06 km NE of East Foothills, California · 14861 days ago · 6 km deep · 71 km away
  36. 1.68 km NE of San Martin, California · 14860 days ago · 7 km deep · 82 km away
  37. 1.713 km N of Morgan Hill, California · 14859 days ago · 6 km deep · 75 km away
  38. 1.610 km NNE of Morgan Hill, California · 14859 days ago · 5 km deep · 78 km away
  39. 2.714 km N of Morgan Hill, California · 14858 days ago · 5 km deep · 75 km away
  40. 1.72 km NE of Alamo, California · 14858 days ago · 7 km deep · 81 km away
  41. 1.711 km NNE of East Foothills, California · 14857 days ago · 2 km deep · 67 km away
  42. 3.014 km N of Morgan Hill, California · 14855 days ago · 4 km deep · 76 km away
  43. 2.32 km ENE of San Martin, California · 14854 days ago · 4 km deep · 88 km away
  44. 1.610 km SE of Livermore, California · 14852 days ago · 8 km deep · 54 km away
  45. 2.08 km NNE of Bear Valley, California · 14852 days ago · 29 km deep · 89 km away
  46. 2.0Northern California · 14852 days ago · 6 km deep · 71 km away
  47. 2.99 km NNW of Hollister, California · 14851 days ago · 7 km deep · 98 km away
  48. 2.19 km NNW of Hollister, California · 14851 days ago · 5 km deep · 98 km away
  49. 1.59 km ESE of East Foothills, California · 14850 days ago · 8 km deep · 72 km away
  50. 1.82 km NNE of Ashland, California · 14849 days ago · 5 km deep · 89 km away
  51. 1.89 km ENE of Seven Trees, California · 14848 days ago · 6 km deep · 77 km away
  52. 2.012 km N of Pittsburg, California · 14848 days ago · 16 km deep · 78 km away
  53. 1.53 km NNE of San Ramon, California · 14847 days ago · 12 km deep · 76 km away
  54. 1.75 km SE of Pleasanton, California · 14847 days ago · 5 km deep · 67 km away
  55. 1.512 km NNE of Morgan Hill, California · 14847 days ago · 6 km deep · 76 km away
  56. 1.88 km NE of Morgan Hill, California · 14846 days ago · 3 km deep · 79 km away
  57. 1.64 km SE of Pleasanton, California · 14846 days ago · 5 km deep · 67 km away
  58. 1.74 km SE of Pleasanton, California · 14846 days ago · 5 km deep · 67 km away
  59. 2.54 km SE of Pleasanton, California · 14846 days ago · 4 km deep · 67 km away
  60. 3.14 km SE of Pleasanton, California · 14846 days ago · 6 km deep · 67 km away

The first 60 of 110.

Before

  1. 2.011 km E of Blackhawk, California · 14887 days ago · 21 km deep · 61 km away
  2. 2.03 km N of Pittsburg, California · 14887 days ago · 18 km deep · 76 km away
  3. 2.13 km SSE of Sunol, California · 14887 days ago · 8 km deep · 73 km away
  4. 1.613 km N of Morgan Hill, California · 14888 days ago · 2 km deep · 76 km away
  5. 2.210 km SE of Buck Meadows, California · 14888 days ago · 4 km deep · 97 km away
  6. 2.50 km W of Pleasant Hill, California · 14890 days ago · 9 km deep · 87 km away
  7. 1.90 km NNW of Concord, California · 14890 days ago · 16 km deep · 85 km away
  8. 2.86 km NE of East Foothills, California · 14891 days ago · 4 km deep · 71 km away
  9. 2.3Central California · 14892 days ago · 19 km deep · 97 km away
  10. 2.59 km NE of San Martin, California · 14892 days ago · 8 km deep · 80 km away
  11. 1.77 km W of Gilroy, California · 14893 days ago · 9 km deep · 100 km away
  12. 1.63 km N of East Foothills, California · 14893 days ago · 0 km deep · 76 km away
  13. 2.212 km NE of Bear Valley, California · 14893 days ago · 4 km deep · 97 km away
  14. 1.616 km E of Seven Trees, California · 14893 days ago · 6 km deep · 75 km away
  15. 1.78 km ENE of Morgan Hill, California · 14893 days ago · 3 km deep · 80 km away
  16. 1.96 km NE of East Foothills, California · 14894 days ago · 4 km deep · 71 km away
  17. 1.926 km W of Volta, California · 14896 days ago · 4 km deep · 78 km away
  18. 2.13 km N of East Foothills, California · 14896 days ago · 0 km deep · 75 km away
  19. 2.14 km S of Buck Meadows, California · 14896 days ago · 4 km deep · 90 km away
  20. 1.812 km SE of Buck Meadows, California · 14896 days ago · 4 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1134076. Read Wed, Sep 23, 2026, 3:49 PM UTC.