California earthquakes

M2.1 earthquake 6 km NE of Ridgemark, California

A magnitude 2.1 earthquake struck 6 km NE of Ridgemark, California on Tue, Jan 28, 1986, 1:52 AM PST (09:52 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.2 5 km NE 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
2.1 (md), micro
Local time
UTC
1986-01-28 09:52:43 UTC
Depth
6.7 km (4.2 mi), shallow
Epicenter
36.847° N, 121.312° 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, 0.4 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
44°
Stations used
58

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and 187 in the 30 days before it.

After

  1. 1.64 km NNE of Tres Pinos, California · 14854 days ago · 4 km deep · 3 km away
  2. 1.64 km NE of Tres Pinos, California · 14854 days ago · 7 km deep · 4 km away
  3. 1.84 km NE of Tres Pinos, California · 14854 days ago · 8 km deep · 4 km away
  4. 2.024 km NE of Greenfield, California · 14854 days ago · 7 km deep · 47 km away
  5. 1.53 km ENE of Tres Pinos, California · 14854 days ago · 4 km deep · 6 km away
  6. 2.1Central California · 14854 days ago · 8 km deep · 5 km away
  7. 2.115 km SE of Carmel Valley Village, California · 14854 days ago · 4 km deep · 56 km away
  8. 1.610 km SSW of Tres Pinos, California · 14853 days ago · 7 km deep · 16 km away
  9. 2.23 km ENE of Tres Pinos, California · 14853 days ago · 8 km deep · 5 km away
  10. 2.0Central California · 14853 days ago · 8 km deep · 5 km away
  11. 1.92 km ENE of Tres Pinos, California · 14853 days ago · 4 km deep · 6 km away
  12. 1.65 km NNE of Tres Pinos, California · 14853 days ago · 6 km deep · 2 km away
  13. 1.85 km NE of Tres Pinos, California · 14853 days ago · 6 km deep · 3 km away
  14. 2.17 km NE of Interlaken, California · 14853 days ago · 10 km deep · 36 km away
  15. 1.75 km SE of Pleasanton, California · 14853 days ago · 5 km deep · 99 km away
  16. 1.512 km NNE of Morgan Hill, California · 14853 days ago · 6 km deep · 52 km away
  17. 2.34 km ENE of Tres Pinos, California · 14852 days ago · 9 km deep · 5 km away
  18. 1.55 km NE of Tres Pinos, California · 14852 days ago · 7 km deep · 3 km away
  19. 1.64 km ENE of Tres Pinos, California · 14852 days ago · 7 km deep · 5 km away
  20. 1.924 km ENE of Greenfield, California · 14852 days ago · 1 km deep · 54 km away
  21. 1.88 km NE of Morgan Hill, California · 14852 days ago · 3 km deep · 44 km away
  22. 1.95 km NNE of Tres Pinos, California · 14852 days ago · 8 km deep · 2 km away
  23. 1.73 km NE of Tres Pinos, California · 14852 days ago · 8 km deep · 5 km away
  24. 1.75 km NNE of Tres Pinos, California · 14852 days ago · 8 km deep · 3 km away
  25. 1.64 km SE of Pleasanton, California · 14852 days ago · 5 km deep · 99 km away
  26. 1.74 km SE of Pleasanton, California · 14852 days ago · 5 km deep · 99 km away
  27. 2.54 km SE of Pleasanton, California · 14852 days ago · 4 km deep · 100 km away
  28. 3.14 km SE of Pleasanton, California · 14852 days ago · 6 km deep · 99 km away
  29. 1.64 km SE of Pleasanton, California · 14852 days ago · 5 km deep · 99 km away
  30. 1.54 km SE of Pleasanton, California · 14852 days ago · 5 km deep · 99 km away
  31. 1.84 km NE of Tres Pinos, California · 14851 days ago · 8 km deep · 4 km away
  32. 1.74 km NNE of Tres Pinos, California · 14851 days ago · 7 km deep · 2 km away
  33. 1.64 km ESE of Pleasanton, California · 14851 days ago · 4 km deep · 99 km away
  34. 2.94 km SE of Pleasanton, California · 14851 days ago · 6 km deep · 99 km away
  35. 1.622 km NE of San Lucas, California · 14851 days ago · 4 km deep · 77 km away
  36. 1.74 km ESE of Pleasanton, California · 14851 days ago · 6 km deep · 99 km away
  37. 1.54 km ESE of Pleasanton, California · 14851 days ago · 5 km deep · 100 km away
  38. 1.84 km ESE of Pleasanton, California · 14851 days ago · 6 km deep · 99 km away
  39. 2.04 km SE of Pleasanton, California · 14851 days ago · 5 km deep · 99 km away
  40. 2.66 km NE of Ridgemark, California · 14851 days ago · 7 km deep · 0 km away
  41. 2.14 km SE of Pleasanton, California · 14851 days ago · 6 km deep · 99 km away
  42. 1.85 km NNE of Tres Pinos, California · 14851 days ago · 4 km deep · 1 km away
  43. 1.64 km ESE of Pleasanton, California · 14851 days ago · 6 km deep · 100 km away
  44. 2.04 km ESE of Pleasanton, California · 14851 days ago · 7 km deep · 100 km away
  45. 2.05 km ENE of Tres Pinos, California · 14851 days ago · 8 km deep · 6 km away
  46. 1.85 km NNE of Tres Pinos, California · 14851 days ago · 7 km deep · 3 km away
  47. 1.94 km NE of Tres Pinos, California · 14851 days ago · 8 km deep · 4 km away
  48. 1.621 km NE of Soledad, California · 14851 days ago · 8 km deep · 35 km away
  49. 2.115 km N of Morgan Hill, California · 14851 days ago · 2 km deep · 56 km away
  50. 1.65 km ENE of Tres Pinos, California · 14851 days ago · 4 km deep · 6 km away
  51. 2.65 km NNE of Tres Pinos, California · 14851 days ago · 5 km deep · 3 km away
  52. 1.921 km NNE of Soledad, California · 14851 days ago · 6 km deep · 30 km away
  53. 1.63 km E of Tres Pinos, California · 14850 days ago · 9 km deep · 7 km away
  54. 2.15 km NNE of Tres Pinos, California · 14850 days ago · 7 km deep · 3 km away
  55. 1.68 km ESE of East Foothills, California · 14850 days ago · 8 km deep · 67 km away
  56. 1.722 km SSW of Los Banos, California · 14850 days ago · 0 km deep · 30 km away
  57. 1.63 km ENE of Tres Pinos, California · 14850 days ago · 8 km deep · 5 km away
  58. 2.15 km NNE of Tres Pinos, California · 14850 days ago · 8 km deep · 2 km away
  59. 1.74 km ENE of Tres Pinos, California · 14850 days ago · 9 km deep · 6 km away
  60. 2.19 km NE of Gilroy, California · 14850 days ago · 8 km deep · 28 km away

The first 60 of 190.

Before

  1. 1.89 km ENE of Seven Trees, California · 14854 days ago · 6 km deep · 64 km away
  2. 2.05 km NE of Tres Pinos, California · 14854 days ago · 8 km deep · 3 km away
  3. 1.84 km NNE of Tres Pinos, California · 14854 days ago · 5 km deep · 2 km away
  4. 2.15 km NNE of Tres Pinos, California · 14854 days ago · 5 km deep · 2 km away
  5. 1.54 km NE of Tres Pinos, California · 14854 days ago · 7 km deep · 4 km away
  6. 2.45 km NE of Tres Pinos, California · 14854 days ago · 9 km deep · 4 km away
  7. 1.66 km NNE of Tres Pinos, California · 14854 days ago · 4 km deep · 1 km away
  8. 2.85 km NNE of Tres Pinos, California · 14854 days ago · 5 km deep · 2 km away
  9. 1.55 km NE of Tres Pinos, California · 14854 days ago · 8 km deep · 3 km away
  10. 2.46 km NNE of Tres Pinos, California · 14854 days ago · 4 km deep · 1 km away
  11. 2.25 km NNE of Tres Pinos, California · 14854 days ago · 7 km deep · 3 km away
  12. 2.64 km NNE of Tres Pinos, California · 14854 days ago · 4 km deep · 3 km away
  13. 2.64 km NNE of Tres Pinos, California · 14854 days ago · 4 km deep · 2 km away
  14. 2.16 km NNE of Tres Pinos, California · 14854 days ago · 7 km deep · 2 km away
  15. 1.84 km NE of Tres Pinos, California · 14854 days ago · 4 km deep · 4 km away
  16. 1.64 km ENE of Tres Pinos, California · 14854 days ago · 8 km deep · 6 km away
  17. 1.8Central California · 14854 days ago · 8 km deep · 3 km away
  18. 2.54 km NE of Tres Pinos, California · 14854 days ago · 8 km deep · 4 km away
  19. 1.522 km NE of Soledad, California · 14854 days ago · 5 km deep · 31 km away
  20. 1.54 km NE of Tres Pinos, California · 14854 days ago · 7 km deep · 4 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc64685. Read Tue, Sep 29, 2026, 8:39 AM UTC.