California earthquakes

M2.0 earthquake 5 km SSW of Ridgemark, California

A magnitude 2.0 earthquake struck 5 km SSW of Ridgemark, California on Tue, Dec 1, 1981, 8:49 PM PST (04:49 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.1 22 km NE of San Ardo, 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.0 (md), micro
Local time
UTC
1981-12-02 04:49:34 UTC
Depth
9.2 km (5.7 mi), shallow
Epicenter
36.766° N, 121.395° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
27°
Stations used
52

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 139 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 1.721 km WSW of Greenfield, California · 16365 days ago · 12 km deep · 61 km away
  2. 1.730 km SW of South Dos Palos, California · 16365 days ago · 1 km deep · 45 km away
  3. 1.830 km SW of South Dos Palos, California · 16365 days ago · 4 km deep · 46 km away
  4. 3.122 km NE of San Ardo, California · 16363 days ago · 8 km deep · 89 km away
  5. 1.72 km NNW of Hollister, California · 16363 days ago · 7 km deep · 12 km away
  6. 1.921 km NE of Soledad, California · 16361 days ago · 6 km deep · 33 km away
  7. 2.38 km NE of San Martin, California · 16360 days ago · 8 km deep · 42 km away
  8. 1.716 km E of East Foothills, California · 16359 days ago · 6 km deep · 71 km away
  9. 2.07 km NW of El Nido, California · 16359 days ago · 10 km deep · 89 km away
  10. 2.1Central California · 16359 days ago · 3 km deep · 4 km away
  11. 1.99 km SSW of Tres Pinos, California · 16358 days ago · 3 km deep · 8 km away
  12. 2.3Northern California · 16358 days ago · 15 km deep · 60 km away
  13. 2.3Northern California · 16358 days ago · 16 km deep · 61 km away
  14. 1.69 km E of San Martin, California · 16357 days ago · 8 km deep · 37 km away
  15. 2.54 km WNW of San Juan Bautista, California · 16357 days ago · 6 km deep · 20 km away
  16. 1.730 km SE of Big Sur, California · 16357 days ago · 11 km deep · 80 km away
  17. 3.225 km ENE of Greenfield, California · 16357 days ago · 7 km deep · 53 km away
  18. 1.79 km NE of San Martin, California · 16356 days ago · 5 km deep · 46 km away
  19. 1.96 km SSE of Gilroy, California · 16356 days ago · 4 km deep · 24 km away
  20. 1.89 km NNE of San Juan Bautista, California · 16356 days ago · 2 km deep · 21 km away
  21. 1.638 km W of Three Rocks, California · 16355 days ago · 7 km deep · 58 km away
  22. 2.29 km E of Gilroy, California · 16355 days ago · 6 km deep · 27 km away
  23. 2.623 km NE of San Ardo, California · 16354 days ago · 8 km deep · 89 km away
  24. 1.521 km NE of Soledad, California · 16354 days ago · 2 km deep · 30 km away
  25. 2.425 km ENE of Greenfield, California · 16354 days ago · 7 km deep · 53 km away
  26. 1.8Central California · 16354 days ago · 6 km deep · 53 km away
  27. 2.08 km ENE of San Martin, California · 16352 days ago · 7 km deep · 41 km away
  28. 1.68 km ENE of San Martin, California · 16352 days ago · 7 km deep · 41 km away
  29. 1.722 km NE of Soledad, California · 16351 days ago · 2 km deep · 35 km away
  30. 1.65 km SSW of Ridgemark, California · 16351 days ago · 5 km deep · 2 km away
  31. 2.038 km W of Three Rocks, California · 16351 days ago · 7 km deep · 57 km away
  32. 1.638 km W of Three Rocks, California · 16351 days ago · 6 km deep · 57 km away
  33. 3.038 km W of Three Rocks, California · 16351 days ago · 7 km deep · 57 km away
  34. 1.88 km ENE of Morgan Hill, California · 16351 days ago · 4 km deep · 46 km away
  35. 1.632 km W of Three Rocks, California · 16351 days ago · 28 km deep · 63 km away
  36. 2.638 km W of Three Rocks, California · 16351 days ago · 6 km deep · 58 km away
  37. 1.725 km ENE of Greenfield, California · 16351 days ago · 1 km deep · 50 km away
  38. 2.738 km W of Three Rocks, California · 16351 days ago · 5 km deep · 57 km away
  39. 1.537 km W of Three Rocks, California · 16350 days ago · -1 km deep · 58 km away
  40. 1.524 km ENE of Greenfield, California · 16350 days ago · 5 km deep · 50 km away
  41. 2.516 km E of East Foothills, California · 16350 days ago · 6 km deep · 71 km away
  42. 2.538 km W of Three Rocks, California · 16350 days ago · 6 km deep · 57 km away
  43. 2.523 km ENE of Soledad, California · 16350 days ago · 5 km deep · 41 km away
  44. 1.629 km ENE of Soledad, California · 16349 days ago · 5 km deep · 39 km away
  45. 1.737 km W of Lockwood, California · 16349 days ago · 14 km deep · 89 km away
  46. 2.037 km W of Three Rocks, California · 16349 days ago · 7 km deep · 58 km away
  47. 1.938 km W of Three Rocks, California · 16349 days ago · 5 km deep · 57 km away
  48. 1.914 km WSW of Three Rocks, California · 16348 days ago · 14 km deep · 82 km away
  49. 2.324 km NE of Greenfield, California · 16348 days ago · 4 km deep · 45 km away
  50. 1.624 km ENE of Greenfield, California · 16347 days ago · 1 km deep · 50 km away
  51. 1.737 km W of Three Rocks, California · 16347 days ago · 5 km deep · 58 km away
  52. 1.925 km NE of Soledad, California · 16347 days ago · 9 km deep · 32 km away
  53. 1.825 km NE of Soledad, California · 16347 days ago · 9 km deep · 32 km away
  54. 1.523 km ENE of Soledad, California · 16347 days ago · 2 km deep · 41 km away
  55. 1.77 km NE of Aromas, California · 16346 days ago · 6 km deep · 24 km away
  56. 1.84 km SE of Tres Pinos, California · 16346 days ago · 7 km deep · 10 km away
  57. 1.68 km ESE of East Foothills, California · 16346 days ago · 6 km deep · 73 km away
  58. 1.8Central California · 16346 days ago · 3 km deep · 32 km away
  59. 1.64 km ESE of Aromas, California · 16345 days ago · 7 km deep · 21 km away
  60. 2.021 km NE of Soledad, California · 16345 days ago · 8 km deep · 28 km away

The first 60 of 139.

Before

  1. 1.625 km SSW of Los Banos, California · 16366 days ago · 2 km deep · 42 km away
  2. 1.612 km N of Hollister, California · 16366 days ago · 6 km deep · 22 km away
  3. 1.59 km NE of Morgan Hill, California · 16367 days ago · 5 km deep · 50 km away
  4. 1.69 km NE of San Martin, California · 16367 days ago · 8 km deep · 45 km away
  5. 2.09 km E of Gilroy, California · 16367 days ago · 9 km deep · 26 km away
  6. 1.624 km NE of Greenfield, California · 16368 days ago · 5 km deep · 44 km away
  7. 1.530 km ENE of Soledad, California · 16368 days ago · 6 km deep · 39 km away
  8. 2.120 km SSE of Tres Pinos, California · 16368 days ago · 4 km deep · 23 km away
  9. 2.12 km E of San Juan Bautista, California · 16368 days ago · 8 km deep · 13 km away
  10. 1.89 km ESE of East Foothills, California · 16368 days ago · 7 km deep · 72 km away
  11. 2.39 km ESE of East Foothills, California · 16368 days ago · 7 km deep · 71 km away
  12. 1.721 km NE of Soledad, California · 16369 days ago · 7 km deep · 32 km away
  13. 1.77 km E of East Foothills, California · 16369 days ago · 9 km deep · 75 km away
  14. 1.95 km SSE of San Juan Bautista, California · 16369 days ago · 6 km deep · 11 km away
  15. 1.86 km WNW of San Ardo, California · 16369 days ago · 6 km deep · 89 km away
  16. 1.95 km SSE of San Juan Bautista, California · 16370 days ago · 6 km deep · 11 km away
  17. 2.45 km SSE of San Juan Bautista, California · 16370 days ago · 7 km deep · 12 km away
  18. 2.35 km SSE of San Juan Bautista, California · 16370 days ago · 7 km deep · 12 km away
  19. 1.76 km WNW of San Ardo, California · 16370 days ago · 6 km deep · 89 km away
  20. 2.65 km SSE of San Juan Bautista, California · 16370 days ago · 7 km deep · 12 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1069920. Read Tue, Sep 22, 2026, 5:27 PM UTC.