California earthquakes

M2.1 earthquake 9 km SSW of Ridgemark, California

A magnitude 2.1 earthquake struck 9 km SSW of Ridgemark, California on Tue, Aug 6, 1985, 11:32 AM PDT (18:32 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.2 8 km ENE of Morgan Hill, 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
2.1 (md), micro
Local time
UTC
1985-08-06 18:32:01 UTC
Depth
5.8 km (3.6 mi), shallow
Epicenter
36.735° N, 121.403° 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
±0.17
Depth from
From location
Station coverage gap
41°
Stations used
46

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 19 in the 30 days before it.

After

  1. 2.28 km ENE of Morgan Hill, California · 15022 days ago · 2 km deep · 49 km away
  2. 1.921 km NE of Morgan Hill, California · 15021 days ago · 7 km deep · 61 km away
  3. 1.613 km SSE of Livermore, California · 15021 days ago · 5 km deep · 97 km away
  4. 1.77 km NNE of East Foothills, California · 15021 days ago · 5 km deep · 85 km away
  5. 1.833 km NE of King City, California · 15020 days ago · 7 km deep · 64 km away
  6. 1.615 km E of Seven Trees, California · 15019 days ago · 5 km deep · 66 km away
  7. 1.65 km ENE of Interlaken, California · 15019 days ago · 11 km deep · 35 km away
  8. 1.823 km ENE of Soledad, California · 15018 days ago · 5 km deep · 40 km away
  9. 1.522 km NE of San Lucas, California · 15018 days ago · 7 km deep · 72 km away
  10. 2.7Central California · 15017 days ago · 4 km deep · 32 km away
  11. 1.621 km NE of Soledad, California · 15017 days ago · 5 km deep · 32 km away
  12. 1.921 km NE of Soledad, California · 15017 days ago · 4 km deep · 32 km away
  13. 1.715 km E of Big Sur, California · 15016 days ago · 2 km deep · 56 km away
  14. 1.55 km E of Interlaken, California · 15016 days ago · 10 km deep · 34 km away
  15. 1.55 km E of Interlaken, California · 15016 days ago · 11 km deep · 35 km away
  16. 1.75 km E of Interlaken, California · 15016 days ago · 11 km deep · 35 km away
  17. 1.85 km E of Interlaken, California · 15015 days ago · 10 km deep · 34 km away
  18. 1.75 km E of Interlaken, California · 15015 days ago · 11 km deep · 34 km away
  19. 1.87 km WNW of Del Monte Forest, California · 15015 days ago · 8 km deep · 57 km away
  20. 2.03 km N of Hollister, California · 15015 days ago · 3 km deep · 16 km away
  21. 1.621 km NE of Soledad, California · 15014 days ago · 5 km deep · 32 km away
  22. 1.723 km ENE of Soledad, California · 15014 days ago · 4 km deep · 37 km away
  23. 1.614 km N of Morgan Hill, California · 15013 days ago · 6 km deep · 62 km away
  24. 2.111 km S of Big Sur, California · 15012 days ago · 18 km deep · 74 km away
  25. 2.911 km NNE of Morgan Hill, California · 15012 days ago · 5 km deep · 59 km away
  26. 1.815 km E of Seven Trees, California · 15012 days ago · 5 km deep · 67 km away
  27. 1.512 km N of Morgan Hill, California · 15012 days ago · 7 km deep · 61 km away
  28. 3.18 km ENE of San Martin, California · 15011 days ago · 8 km deep · 45 km away
  29. 2.814 km N of Morgan Hill, California · 15011 days ago · 6 km deep · 62 km away
  30. 1.614 km N of Morgan Hill, California · 15011 days ago · 5 km deep · 62 km away
  31. 1.722 km NNE of San Lucas, California · 15008 days ago · 4 km deep · 66 km away
  32. 2.421 km NE of Soledad, California · 15008 days ago · 4 km deep · 32 km away
  33. 2.321 km NE of Soledad, California · 15008 days ago · 5 km deep · 32 km away
  34. 1.59 km E of San Martin, California · 15007 days ago · 8 km deep · 40 km away
  35. 1.68 km SW of Tres Pinos, California · 15006 days ago · 6 km deep · 2 km away
  36. 2.09 km SW of Tres Pinos, California · 15006 days ago · 6 km deep · 2 km away
  37. 1.89 km NNW of Hollister, California · 15006 days ago · 0 km deep · 23 km away
  38. 3.22 km W of San Juan Bautista, California · 15005 days ago · 5 km deep · 19 km away
  39. 2.62 km W of San Juan Bautista, California · 15005 days ago · 4 km deep · 19 km away
  40. 1.99 km NE of Greenfield, California · 15005 days ago · 14 km deep · 43 km away
  41. 2.410 km ESE of Gilroy, California · 15005 days ago · 4 km deep · 26 km away
  42. 1.611 km ESE of East Foothills, California · 15004 days ago · 7 km deep · 72 km away
  43. 2.414 km E of Seven Trees, California · 15004 days ago · 3 km deep · 67 km away
  44. 2.55 km SW of Gilroy, California · 15004 days ago · 4 km deep · 32 km away
  45. 1.918 km SSW of Three Rocks, California · 15004 days ago · 9 km deep · 97 km away
  46. 1.622 km ENE of Soledad, California · 15003 days ago · 5 km deep · 37 km away
  47. 2.222 km NE of Soledad, California · 15003 days ago · 2 km deep · 33 km away
  48. 2.434 km W of Three Rocks, California · 15003 days ago · 6 km deep · 60 km away
  49. 1.824 km NE of Greenfield, California · 15003 days ago · 5 km deep · 44 km away
  50. 1.523 km ENE of San Lucas, California · 15002 days ago · 4 km deep · 78 km away
  51. 1.621 km NE of Soledad, California · 15002 days ago · 2 km deep · 27 km away
  52. 1.617 km SSE of Tres Pinos, California · 15001 days ago · 6 km deep · 18 km away
  53. 2.212 km ESE of East Foothills, California · 15000 days ago · 6 km deep · 70 km away
  54. 2.312 km ESE of East Foothills, California · 15000 days ago · 8 km deep · 70 km away
  55. 1.614 km E of Seven Trees, California · 15000 days ago · 3 km deep · 66 km away
  56. 2.023 km NE of Greenfield, California · 14999 days ago · 5 km deep · 44 km away
  57. 1.77 km ENE of Interlaken, California · 14999 days ago · 3 km deep · 36 km away
  58. 2.023 km ENE of Soledad, California · 14999 days ago · 4 km deep · 39 km away
  59. 2.515 km E of Seven Trees, California · 14999 days ago · 6 km deep · 66 km away
  60. 1.911 km ESE of East Foothills, California · 14998 days ago · 7 km deep · 72 km away

The first 60 of 135.

Before

  1. 1.91 km SW of San Ardo, California · 15022 days ago · 10 km deep · 91 km away
  2. 2.421 km NE of Soledad, California · 15022 days ago · 6 km deep · 31 km away
  3. 1.523 km ENE of Soledad, California · 15022 days ago · 4 km deep · 37 km away
  4. 1.921 km NE of Soledad, California · 15024 days ago · 6 km deep · 29 km away
  5. 1.521 km NNE of Soledad, California · 15025 days ago · 8 km deep · 24 km away
  6. 2.816 km N of Morgan Hill, California · 15026 days ago · 8 km deep · 64 km away
  7. 1.822 km NE of Soledad, California · 15026 days ago · 2 km deep · 33 km away
  8. 1.616 km N of Morgan Hill, California · 15026 days ago · 8 km deep · 64 km away
  9. 2.222 km NE of Soledad, California · 15026 days ago · 2 km deep · 33 km away
  10. 2.06 km SE of Tres Pinos, California · 15026 days ago · 8 km deep · 12 km away
  11. 2.024 km NE of Soledad, California · 15028 days ago · 3 km deep · 34 km away
  12. 1.75 km SE of Tres Pinos, California · 15028 days ago · 8 km deep · 12 km away
  13. 1.813 km N of Morgan Hill, California · 15028 days ago · 4 km deep · 61 km away
  14. 1.921 km NE of Soledad, California · 15028 days ago · 6 km deep · 29 km away
  15. 1.636 km SSW of South Dos Palos, California · 15029 days ago · 8 km deep · 51 km away
  16. 1.720 km SW of Three Rocks, California · 15029 days ago · 5 km deep · 84 km away
  17. 1.623 km ENE of San Lucas, California · 15029 days ago · 5 km deep · 79 km away
  18. 2.122 km NNE of Soledad, California · 15029 days ago · 5 km deep · 23 km away
  19. 1.612 km S of Tres Pinos, California · 15030 days ago · 4 km deep · 11 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc53773. Read Tue, Sep 22, 2026, 5:14 PM UTC.