California earthquakes

M1.8 earthquake 9 km SSW of Ridgemark, California

A magnitude 1.8 earthquake struck 9 km SSW of Ridgemark, California on Sat, Jan 2, 1982, 9:21 AM PST (17:21 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.1 28 km SE 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
1.8 (md), micro
Local time
UTC
1982-01-02 17:21:47 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
36.739° N, 121.413° 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 2.7 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
217°, poorly surrounded by stations
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: 149 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 1.524 km ENE of Greenfield, California · 16333 days ago · 5 km deep · 51 km away
  2. 1.64 km ENE of Lompico, California · 16332 days ago · 7 km deep · 68 km away
  3. 3.128 km SE of Tres Pinos, California · 16332 days ago · 11 km deep · 33 km away
  4. 2.22 km SSW of Hollister, California · 16332 days ago · 8 km deep · 11 km away
  5. 1.79 km NE of San Martin, California · 16330 days ago · 6 km deep · 48 km away
  6. 1.921 km WSW of Three Rocks, California · 16330 days ago · 11 km deep · 77 km away
  7. 2.217 km E of East Foothills, California · 16328 days ago · 6 km deep · 74 km away
  8. 2.123 km NE of Greenfield, California · 16328 days ago · 6 km deep · 45 km away
  9. 1.929 km SE of Tres Pinos, California · 16328 days ago · 10 km deep · 33 km away
  10. 2.17 km E of East Foothills, California · 16327 days ago · 8 km deep · 77 km away
  11. 1.816 km SSE of Tres Pinos, California · 16326 days ago · 2 km deep · 17 km away
  12. 2.122 km NNE of Soledad, California · 16326 days ago · 5 km deep · 24 km away
  13. 1.611 km S of Tres Pinos, California · 16326 days ago · 4 km deep · 11 km away
  14. 2.69 km S of South Dos Palos, California · 16325 days ago · -1 km deep · 71 km away
  15. 2.510 km S of South Dos Palos, California · 16325 days ago · 3 km deep · 71 km away
  16. 2.411 km S of Tres Pinos, California · 16325 days ago · 4 km deep · 11 km away
  17. 2.713 km SSE of Tres Pinos, California · 16325 days ago · 3 km deep · 14 km away
  18. 2.516 km ENE of East Foothills, California · 16325 days ago · 3 km deep · 78 km away
  19. 2.723 km ENE of Soledad, California · 16325 days ago · 5 km deep · 37 km away
  20. 2.39 km NE of Gilroy, California · 16325 days ago · 9 km deep · 37 km away
  21. 2.611 km S of Tres Pinos, California · 16324 days ago · 4 km deep · 11 km away
  22. 1.920 km SSE of Tres Pinos, California · 16324 days ago · 4 km deep · 21 km away
  23. 1.624 km ENE of Soledad, California · 16323 days ago · 2 km deep · 40 km away
  24. 2.017 km SSW of South Dos Palos, California · 16323 days ago · 3 km deep · 59 km away
  25. 2.910 km S of Tres Pinos, California · 16322 days ago · 4 km deep · 10 km away
  26. 1.716 km SSE of Tres Pinos, California · 16321 days ago · 3 km deep · 17 km away
  27. 2.124 km NE of San Lucas, California · 16320 days ago · 4 km deep · 69 km away
  28. 2.08 km NE of Hollister, California · 16319 days ago · 2 km deep · 19 km away
  29. 2.821 km WSW of Greenfield, California · 16318 days ago · 11 km deep · 57 km away
  30. 2.425 km ENE of Greenfield, California · 16317 days ago · 4 km deep · 53 km away
  31. 1.525 km NE of Greenfield, California · 16317 days ago · 1 km deep · 48 km away
  32. 2.05 km SSE of San Juan Bautista, California · 16317 days ago · 7 km deep · 11 km away
  33. 1.733 km W of Three Rocks, California · 16316 days ago · 12 km deep · 67 km away
  34. 2.210 km NNW of Hollister, California · 16315 days ago · 4 km deep · 22 km away
  35. 2.425 km NE of Greenfield, California · 16314 days ago · 0 km deep · 47 km away
  36. 2.121 km SW of Three Rocks, California · 16312 days ago · 38 km deep · 85 km away
  37. 2.121 km NE of Soledad, California · 16312 days ago · 6 km deep · 30 km away
  38. 2.421 km NE of Soledad, California · 16312 days ago · 7 km deep · 31 km away
  39. 2.122 km NE of San Lucas, California · 16311 days ago · 5 km deep · 72 km away
  40. 2.122 km NE of Soledad, California · 16311 days ago · 4 km deep · 32 km away
  41. 1.821 km NE of Soledad, California · 16311 days ago · 3 km deep · 32 km away
  42. 1.714 km NE of East Foothills, California · 16309 days ago · 5 km deep · 85 km away
  43. 2.225 km SE of Tres Pinos, California · 16309 days ago · 6 km deep · 27 km away
  44. 1.79 km NE of San Martin, California · 16309 days ago · 8 km deep · 47 km away
  45. 2.422 km NE of Soledad, California · 16309 days ago · 5 km deep · 32 km away
  46. 3.0Northern California · 16309 days ago · 12 km deep · 40 km away
  47. 1.7Northern California · 16309 days ago · 11 km deep · 41 km away
  48. 1.8Central California · 16309 days ago · 10 km deep · 35 km away
  49. 2.514 km NE of East Foothills, California · 16308 days ago · 4 km deep · 85 km away
  50. 1.84 km SW of Ridgemark, California · 16308 days ago · 4 km deep · 5 km away
  51. 2.029 km ESE of Tres Pinos, California · 16308 days ago · 0 km deep · 37 km away
  52. 1.738 km W of Three Rocks, California · 16306 days ago · 5 km deep · 57 km away
  53. 1.612 km NNE of Morgan Hill, California · 16306 days ago · 6 km deep · 58 km away
  54. 2.28 km NW of El Nido, California · 16304 days ago · 14 km deep · 90 km away
  55. 1.79 km NE of Gilroy, California · 16304 days ago · 8 km deep · 37 km away
  56. 2.938 km W of Lockwood, California · 16304 days ago · 14 km deep · 86 km away
  57. 2.822 km NE of Tres Pinos, California · 16304 days ago · 2 km deep · 32 km away
  58. 1.924 km ENE of Greenfield, California · 16304 days ago · 5 km deep · 50 km away
  59. 2.017 km SSE of Tres Pinos, California · 16304 days ago · 8 km deep · 20 km away
  60. 2.221 km NE of Soledad, California · 16304 days ago · 6 km deep · 30 km away

The first 60 of 149.

Before

  1. 2.38 km ENE of Patterson, California · 16334 days ago · 10 km deep · 91 km away
  2. 1.625 km ENE of Greenfield, California · 16335 days ago · 5 km deep · 53 km away
  3. 1.724 km ENE of San Lucas, California · 16335 days ago · 5 km deep · 81 km away
  4. 2.128 km NE of Greenfield, California · 16337 days ago · 9 km deep · 46 km away
  5. 1.525 km SE of Tres Pinos, California · 16337 days ago · 6 km deep · 29 km away
  6. 2.024 km NE of King City, California · 16338 days ago · 0 km deep · 56 km away
  7. 1.833 km SE of Tres Pinos, California · 16339 days ago · 7 km deep · 38 km away
  8. 1.621 km NE of Soledad, California · 16340 days ago · 3 km deep · 29 km away
  9. 2.19 km NW of Hollister, California · 16340 days ago · 7 km deep · 21 km away
  10. 1.612 km ENE of Hollister, California · 16340 days ago · 4 km deep · 23 km away
  11. 1.68 km NNE of Interlaken, California · 16340 days ago · 10 km deep · 39 km away
  12. 1.610 km SE of San Juan Bautista, California · 16341 days ago · 7 km deep · 6 km away
  13. 1.521 km NE of Soledad, California · 16341 days ago · 8 km deep · 33 km away
  14. 1.85 km SW of Gilroy, California · 16341 days ago · 3 km deep · 31 km away
  15. 2.024 km NE of San Lucas, California · 16341 days ago · 6 km deep · 75 km away
  16. 1.825 km ENE of Greenfield, California · 16342 days ago · 6 km deep · 52 km away
  17. 1.812 km W of Three Rocks, California · 16342 days ago · 10 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1070903. Read Tue, Sep 22, 2026, 3:08 PM UTC.