California earthquakes

M1.6 earthquake 8 km SSW of Ridgemark, California

A magnitude 1.6 earthquake struck 8 km SSW of Ridgemark, California on Fri, Jun 8, 1984, 2:14 AM PDT (09:14 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.8 6 km NNE of Interlaken, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-06-08 09:14:58 UTC
Depth
6.7 km (4.1 mi), shallow
Epicenter
36.741° N, 121.411° 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, 0.3 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
37°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 179 in the 60 days after this one and 189 in the 30 days before it.

After

  1. 1.92 km WNW of Cambrian Park, California · 15458 days ago · 7 km deep · 76 km away
  2. 1.812 km N of Morgan Hill, California · 15458 days ago · 4 km deep · 60 km away
  3. 1.615 km N of Morgan Hill, California · 15458 days ago · 6 km deep · 63 km away
  4. 1.6Northern California · 15458 days ago · 5 km deep · 63 km away
  5. 1.66 km E of Morgan Hill, California · 15458 days ago · 1 km deep · 47 km away
  6. 2.48 km ENE of Milpitas, California · 15458 days ago · 6 km deep · 88 km away
  7. 1.614 km NNE of Morgan Hill, California · 15457 days ago · 2 km deep · 59 km away
  8. 1.58 km NNE of San Martin, California · 15457 days ago · 0 km deep · 47 km away
  9. 1.58 km NNE of San Martin, California · 15457 days ago · 0 km deep · 47 km away
  10. 3.016 km E of Seven Trees, California · 15457 days ago · 6 km deep · 64 km away
  11. 1.614 km N of Morgan Hill, California · 15457 days ago · 7 km deep · 62 km away
  12. 1.715 km NNE of Morgan Hill, California · 15457 days ago · 1 km deep · 60 km away
  13. 1.915 km E of East Foothills, California · 15456 days ago · 6 km deep · 75 km away
  14. 1.533 km WSW of Three Rocks, California · 15456 days ago · 14 km deep · 70 km away
  15. 2.711 km NNE of Morgan Hill, California · 15456 days ago · 4 km deep · 57 km away
  16. 2.28 km N of East Foothills, California · 15456 days ago · 5 km deep · 87 km away
  17. 1.515 km E of Seven Trees, California · 15455 days ago · 7 km deep · 65 km away
  18. 1.621 km NE of Soledad, California · 15455 days ago · 6 km deep · 32 km away
  19. 1.515 km N of Morgan Hill, California · 15455 days ago · 8 km deep · 62 km away
  20. 1.614 km ENE of East Foothills, California · 15455 days ago · 6 km deep · 79 km away
  21. 2.114 km NNE of Morgan Hill, California · 15455 days ago · 3 km deep · 59 km away
  22. 2.612 km ESE of East Foothills, California · 15455 days ago · 6 km deep · 70 km away
  23. 1.68 km NE of San Martin, California · 15455 days ago · 1 km deep · 47 km away
  24. 1.97 km ENE of Morgan Hill, California · 15454 days ago · 2 km deep · 48 km away
  25. 2.612 km ESE of Gilroy, California · 15454 days ago · 5 km deep · 24 km away
  26. 1.97 km ENE of Morgan Hill, California · 15453 days ago · 2 km deep · 47 km away
  27. 1.613 km N of Morgan Hill, California · 15453 days ago · 4 km deep · 60 km away
  28. 2.47 km NNE of San Martin, California · 15453 days ago · 3 km deep · 47 km away
  29. 1.98 km NE of Morgan Hill, California · 15453 days ago · 3 km deep · 51 km away
  30. 1.76 km SE of Alum Rock, California · 15453 days ago · 7 km deep · 72 km away
  31. 1.524 km SE of Tres Pinos, California · 15453 days ago · 8 km deep · 28 km away
  32. 1.511 km NNW of Hollister, California · 15452 days ago · 3 km deep · 24 km away
  33. 2.314 km NNW of Big Sur, California · 15452 days ago · 10 km deep · 56 km away
  34. 1.715 km E of Tres Pinos, California · 15452 days ago · 2 km deep · 24 km away
  35. 2.419 km ENE of East Foothills, California · 15452 days ago · 6 km deep · 81 km away
  36. 1.912 km N of Morgan Hill, California · 15452 days ago · 5 km deep · 59 km away
  37. 1.913 km ESE of East Foothills, California · 15452 days ago · 7 km deep · 69 km away
  38. 1.815 km E of Seven Trees, California · 15451 days ago · 8 km deep · 65 km away
  39. 2.03 km SSE of Seven Trees, California · 15451 days ago · 2 km deep · 68 km away
  40. 1.57 km S of Sunol, California · 15451 days ago · 8 km deep · 97 km away
  41. 3.013 km ESE of Alum Rock, California · 15451 days ago · 6 km deep · 68 km away
  42. 2.813 km ESE of Alum Rock, California · 15451 days ago · 7 km deep · 68 km away
  43. 1.83 km SSE of Seven Trees, California · 15451 days ago · 3 km deep · 68 km away
  44. 1.814 km SSE of Tres Pinos, California · 15451 days ago · 4 km deep · 14 km away
  45. 3.415 km E of Seven Trees, California · 15451 days ago · 6 km deep · 65 km away
  46. 2.69 km ESE of East Foothills, California · 15450 days ago · 7 km deep · 74 km away
  47. 1.77 km ENE of Morgan Hill, California · 15449 days ago · 4 km deep · 48 km away
  48. 1.611 km ESE of East Foothills, California · 15449 days ago · 7 km deep · 71 km away
  49. 1.99 km NE of Morgan Hill, California · 15449 days ago · 8 km deep · 54 km away
  50. 1.724 km NE of Greenfield, California · 15449 days ago · 7 km deep · 43 km away
  51. 2.38 km NNE of San Martin, California · 15449 days ago · 1 km deep · 48 km away
  52. 1.84 km WNW of San Juan Bautista, California · 15449 days ago · 6 km deep · 20 km away
  53. 1.93 km SE of Seven Trees, California · 15448 days ago · 1 km deep · 68 km away
  54. 2.15 km N of East Foothills, California · 15448 days ago · 3 km deep · 85 km away
  55. 2.010 km ESE of East Foothills, California · 15448 days ago · 7 km deep · 73 km away
  56. 2.08 km ENE of Morgan Hill, California · 15447 days ago · 3 km deep · 50 km away
  57. 2.041 km NE of Greenfield, California · 15447 days ago · 5 km deep · 51 km away
  58. 2.220 km SE of Tres Pinos, California · 15447 days ago · 6 km deep · 23 km away
  59. 1.923 km ENE of Soledad, California · 15447 days ago · 5 km deep · 41 km away
  60. 1.914 km E of Seven Trees, California · 15447 days ago · 5 km deep · 66 km away

The first 60 of 179.

Before

  1. 1.87 km NNE of San Martin, California · 15459 days ago · 4 km deep · 47 km away
  2. 1.75 km SSW of Gilroy, California · 15459 days ago · 6 km deep · 29 km away
  3. 1.616 km E of Seven Trees, California · 15459 days ago · 5 km deep · 64 km away
  4. 1.815 km E of Seven Trees, California · 15459 days ago · 5 km deep · 64 km away
  5. 2.67 km ENE of Morgan Hill, California · 15459 days ago · 2 km deep · 48 km away
  6. 1.926 km NE of Greenfield, California · 15459 days ago · 6 km deep · 47 km away
  7. 1.79 km NNE of East Foothills, California · 15460 days ago · 6 km deep · 86 km away
  8. 1.723 km SW of Los Banos, California · 15460 days ago · 0 km deep · 40 km away
  9. 1.98 km ENE of Morgan Hill, California · 15460 days ago · 1 km deep · 48 km away
  10. 2.312 km ESE of East Foothills, California · 15460 days ago · 7 km deep · 70 km away
  11. 1.515 km NNE of Morgan Hill, California · 15460 days ago · 1 km deep · 60 km away
  12. 1.914 km N of Morgan Hill, California · 15460 days ago · 6 km deep · 61 km away
  13. 1.716 km E of Seven Trees, California · 15460 days ago · 5 km deep · 64 km away
  14. 1.71 km N of Hollister, California · 15460 days ago · 5 km deep · 14 km away
  15. 1.77 km ENE of Morgan Hill, California · 15460 days ago · 4 km deep · 47 km away
  16. 1.615 km NNE of Morgan Hill, California · 15461 days ago · 1 km deep · 60 km away
  17. 2.315 km NNE of Morgan Hill, California · 15461 days ago · 1 km deep · 60 km away
  18. 1.615 km NNE of Morgan Hill, California · 15461 days ago · 2 km deep · 61 km away
  19. 1.69 km NNE of Hollister, California · 15461 days ago · 6 km deep · 21 km away
  20. 1.815 km NNE of Morgan Hill, California · 15461 days ago · 2 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc20406. Read Sun, Oct 4, 2026, 4:11 PM UTC.