California earthquakes

M1.7 earthquake 7 km SSW of Ridgemark, California

A magnitude 1.7 earthquake struck 7 km SSW of Ridgemark, California on Wed, Dec 8, 1982, 12:43 PM PST (20:43 UTC), 2 km (2 mi) below the surface.

A larger quake followed: M1.9 13 km SSE of Tres Pinos, 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
1.7 (md), micro
Local time
UTC
1982-12-08 20:43:19 UTC
Depth
2.5 km (1.6 mi), shallow
Epicenter
36.746° N, 121.387° 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 0.4 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
129°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 142 in the 60 days after this one and 28 in the 30 days before it.

After

  1. 1.913 km SSE of Tres Pinos, California · 15992 days ago · 5 km deep · 14 km away
  2. 2.49 km NNE of San Martin, California · 15992 days ago · 6 km deep · 48 km away
  3. 1.61 km S of Communications Hill, California · 15992 days ago · 4 km deep · 72 km away
  4. 1.723 km NE of Hollister, California · 15991 days ago · 0 km deep · 32 km away
  5. 2.521 km NE of Soledad, California · 15991 days ago · 7 km deep · 31 km away
  6. 1.521 km NE of Soledad, California · 15991 days ago · 6 km deep · 31 km away
  7. 2.77 km SSE of Gilroy, California · 15991 days ago · 6 km deep · 26 km away
  8. 1.824 km NE of Greenfield, California · 15991 days ago · 5 km deep · 41 km away
  9. 1.538 km W of Three Rocks, California · 15991 days ago · 0 km deep · 55 km away
  10. 1.824 km ENE of San Ardo, California · 15991 days ago · -1 km deep · 99 km away
  11. 1.526 km ENE of Greenfield, California · 15991 days ago · 0 km deep · 51 km away
  12. 2.218 km NE of East Foothills, California · 15991 days ago · 6 km deep · 90 km away
  13. 1.723 km NE of Hollister, California · 15990 days ago · 0 km deep · 32 km away
  14. 2.83 km W of San Juan Bautista, California · 15990 days ago · 6 km deep · 20 km away
  15. 1.63 km W of San Juan Bautista, California · 15990 days ago · 6 km deep · 20 km away
  16. 1.726 km ENE of Greenfield, California · 15990 days ago · 1 km deep · 49 km away
  17. 1.925 km NNE of King City, California · 15990 days ago · 1 km deep · 53 km away
  18. 2.125 km ENE of Greenfield, California · 15990 days ago · 5 km deep · 48 km away
  19. 1.919 km SSW of Volta, California · 15990 days ago · 6 km deep · 40 km away
  20. 1.815 km SSE of Tres Pinos, California · 15990 days ago · 4 km deep · 15 km away
  21. 1.521 km NE of Soledad, California · 15989 days ago · 8 km deep · 31 km away
  22. 2.016 km E of Seven Trees, California · 15989 days ago · 7 km deep · 65 km away
  23. 3.29 km NE of San Juan Bautista, California · 15989 days ago · 5 km deep · 21 km away
  24. 2.014 km SSE of Tres Pinos, California · 15987 days ago · 5 km deep · 14 km away
  25. 2.511 km S of Tres Pinos, California · 15986 days ago · 6 km deep · 10 km away
  26. 2.220 km SSE of Tres Pinos, California · 15985 days ago · 5 km deep · 20 km away
  27. 1.723 km NE of Soledad, California · 15984 days ago · 6 km deep · 30 km away
  28. 1.624 km ENE of Soledad, California · 15984 days ago · 4 km deep · 38 km away
  29. 1.921 km SE of Livermore, California · 15983 days ago · 8 km deep · 91 km away
  30. 1.65 km SSW of Gilroy, California · 15983 days ago · 7 km deep · 30 km away
  31. 2.023 km NE of San Ardo, California · 15982 days ago · 5 km deep · 86 km away
  32. 2.09 km SSW of Ridgemark, California · 15982 days ago · 5 km deep · 2 km away
  33. 3.04 km ESE of Interlaken, California · 15981 days ago · 11 km deep · 34 km away
  34. 2.121 km SSW of Three Rocks, California · 15981 days ago · 10 km deep · 90 km away
  35. 2.88 km NE of Gilroy, California · 15981 days ago · 4 km deep · 36 km away
  36. 1.630 km W of Three Rocks, California · 15981 days ago · 8 km deep · 64 km away
  37. 2.223 km SSW of Three Rocks, California · 15979 days ago · 10 km deep · 91 km away
  38. 2.225 km ENE of Greenfield, California · 15979 days ago · 3 km deep · 47 km away
  39. 1.95 km WSW of Gilroy, California · 15979 days ago · 4 km deep · 34 km away
  40. 1.924 km NW of Coalinga, California · 15978 days ago · 9 km deep · 90 km away
  41. 2.021 km NW of Coalinga, California · 15978 days ago · 8 km deep · 94 km away
  42. 2.34 km SW of Tres Pinos, California · 15977 days ago · 5 km deep · 3 km away
  43. 1.624 km SE of Tres Pinos, California · 15977 days ago · 8 km deep · 26 km away
  44. 3.53 km SSW of San Juan Bautista, California · 15976 days ago · 7 km deep · 16 km away
  45. 1.716 km SSE of Tres Pinos, California · 15976 days ago · 5 km deep · 15 km away
  46. 1.73 km S of San Juan Bautista, California · 15976 days ago · 6 km deep · 15 km away
  47. 2.022 km NE of Soledad, California · 15976 days ago · 4 km deep · 28 km away
  48. 2.04 km SSW of Gilroy, California · 15976 days ago · 6 km deep · 30 km away
  49. 1.922 km ENE of San Ardo, California · 15976 days ago · 3 km deep · 95 km away
  50. 1.93 km S of San Juan Bautista, California · 15976 days ago · 6 km deep · 15 km away
  51. 1.64 km SW of Tres Pinos, California · 15976 days ago · 8 km deep · 3 km away
  52. 2.09 km N of Hollister, California · 15975 days ago · 8 km deep · 21 km away
  53. 2.128 km W of Three Rocks, California · 15975 days ago · 9 km deep · 65 km away
  54. 2.228 km W of Three Rocks, California · 15975 days ago · 9 km deep · 65 km away
  55. 2.610 km S of Tres Pinos, California · 15974 days ago · 5 km deep · 7 km away
  56. 2.48 km ESE of East Foothills, California · 15974 days ago · 6 km deep · 74 km away
  57. 1.621 km NE of King City, California · 15973 days ago · 4 km deep · 62 km away
  58. 2.46 km WSW of Gilroy, California · 15973 days ago · 3 km deep · 35 km away
  59. 2.024 km NE of Greenfield, California · 15973 days ago · 1 km deep · 42 km away
  60. 3.316 km SSE of Tres Pinos, California · 15972 days ago · 4 km deep · 16 km away

The first 60 of 142.

Before

  1. 2.18 km SSW of Tres Pinos, California · 15994 days ago · 3 km deep · 3 km away
  2. 3.18 km SSW of Tres Pinos, California · 15994 days ago · 3 km deep · 3 km away
  3. 2.019 km NNW of Coalinga, California · 15995 days ago · 11 km deep · 97 km away
  4. 1.94 km ESE of Interlaken, California · 15995 days ago · 10 km deep · 34 km away
  5. 3.14 km ESE of Interlaken, California · 15995 days ago · 12 km deep · 34 km away
  6. 2.217 km SSE of Tres Pinos, California · 15995 days ago · 5 km deep · 16 km away
  7. 1.730 km SE of Tres Pinos, California · 15995 days ago · 8 km deep · 33 km away
  8. 1.79 km ENE of Gilroy, California · 15996 days ago · 8 km deep · 33 km away
  9. 1.824 km ENE of Soledad, California · 15997 days ago · -1 km deep · 40 km away
  10. 1.814 km SSE of Tres Pinos, California · 15997 days ago · 4 km deep · 14 km away
  11. 1.817 km SSE of Tres Pinos, California · 15998 days ago · 6 km deep · 16 km away
  12. 1.66 km SW of Ridgemark, California · 15999 days ago · 10 km deep · 4 km away
  13. 2.012 km S of Tres Pinos, California · 15999 days ago · 5 km deep · 10 km away
  14. 1.69 km ESE of East Foothills, California · 16000 days ago · 8 km deep · 74 km away
  15. 1.69 km ESE of East Foothills, California · 16000 days ago · 8 km deep · 74 km away
  16. 2.09 km NE of Milpitas, California · 16001 days ago · 7 km deep · 90 km away
  17. 1.818 km SW of Three Rocks, California · 16001 days ago · 18 km deep · 84 km away
  18. 1.716 km SW of Three Rocks, California · 16002 days ago · 21 km deep · 86 km away
  19. 1.723 km ENE of Greenfield, California · 16002 days ago · 4 km deep · 49 km away
  20. 2.024 km ENE of Soledad, California · 16002 days ago · 4 km deep · 39 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1082814. Read Tue, Sep 22, 2026, 9:29 PM UTC.