California earthquakes

M1.6 earthquake 6 km E of Fremont, California

A magnitude 1.6 earthquake struck 6 km E of Fremont, California on Tue, Apr 9, 1985, 6:23 AM PST (14:23 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.1 12 km N of Morgan Hill, California. This one was a foreshock.

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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), micro
Local time
UTC
1985-04-09 14:23:09 UTC
Depth
9.8 km (6.1 mi), shallow
Epicenter
37.544° N, 121.919° 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, 0.5 km in depth
Magnitude uncertainty
±0.22
Depth from
From location
Station coverage gap
41°
Stations used
34

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 94 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 3.112 km N of Morgan Hill, California · 15141 days ago · 5 km deep · 42 km away
  2. 1.717 km S of Davenport, California · 15140 days ago · 3 km deep · 81 km away
  3. 2.412 km N of Morgan Hill, California · 15139 days ago · 5 km deep · 42 km away
  4. 1.813 km N of Morgan Hill, California · 15139 days ago · 4 km deep · 41 km away
  5. 1.814 km N of Morgan Hill, California · 15139 days ago · 6 km deep · 40 km away
  6. 2.44 km WNW of Saratoga, California · 15137 days ago · 4 km deep · 32 km away
  7. 2.04 km SW of Cupertino, California · 15137 days ago · 5 km deep · 31 km away
  8. 2.419 km SSW of Santa Cruz, California · 15134 days ago · 3 km deep · 84 km away
  9. 1.914 km E of Seven Trees, California · 15134 days ago · 5 km deep · 35 km away
  10. 2.03 km ESE of Aromas, California · 15133 days ago · 7 km deep · 79 km away
  11. 2.4Northern California · 15133 days ago · 8 km deep · 69 km away
  12. 2.68 km ENE of Morgan Hill, California · 15132 days ago · 3 km deep · 53 km away
  13. 1.816 km E of Seven Trees, California · 15131 days ago · 8 km deep · 38 km away
  14. 1.68 km ESE of East Foothills, California · 15131 days ago · 7 km deep · 27 km away
  15. 1.79 km ESE of East Foothills, California · 15131 days ago · 7 km deep · 27 km away
  16. 1.74 km SE of Portola Valley, California · 15130 days ago · 10 km deep · 33 km away
  17. 2.23 km ESE of Berkeley, California · 15129 days ago · 8 km deep · 45 km away
  18. 2.41 km SSW of Green Valley, California · 15129 days ago · 12 km deep · 80 km away
  19. 2.02 km S of Green Valley, California · 15129 days ago · 11 km deep · 79 km away
  20. 2.713 km ESE of Alum Rock, California · 15129 days ago · 7 km deep · 33 km away
  21. 3.08 km NE of San Martin, California · 15128 days ago · 7 km deep · 58 km away
  22. 1.97 km NW of Pescadero, California · 15128 days ago · 11 km deep · 53 km away
  23. 1.98 km ENE of San Martin, California · 15128 days ago · 7 km deep · 60 km away
  24. 2.58 km ENE of San Martin, California · 15127 days ago · 7 km deep · 58 km away
  25. 3.08 km ENE of San Martin, California · 15127 days ago · 7 km deep · 58 km away
  26. 2.09 km NE of San Martin, California · 15127 days ago · 7 km deep · 57 km away
  27. 1.72 km ENE of Union City, California · 15126 days ago · 6 km deep · 9 km away
  28. 1.623 km W of Diablo Grande, California · 15125 days ago · 6 km deep · 36 km away
  29. 1.68 km ENE of San Martin, California · 15124 days ago · 7 km deep · 60 km away
  30. 1.512 km NNE of Hollister, California · 15124 days ago · 8 km deep · 85 km away
  31. 3.15 km S of Gilroy, California · 15123 days ago · 5 km deep · 72 km away
  32. 1.72 km SE of Pittsburg, California · 15123 days ago · 16 km deep · 53 km away
  33. 1.7Northern California · 15122 days ago · 2 km deep · 36 km away
  34. 1.94 km NE of East Foothills, California · 15122 days ago · 3 km deep · 19 km away
  35. 2.13 km ESE of Berkeley, California · 15122 days ago · 8 km deep · 45 km away
  36. 2.05 km SW of Ridgemark, California · 15122 days ago · 7 km deep · 96 km away
  37. 2.33 km SSE of North Gate, California · 15122 days ago · 10 km deep · 37 km away
  38. 1.88 km ENE of San Martin, California · 15121 days ago · 5 km deep · 59 km away
  39. 3.115 km E of Seven Trees, California · 15121 days ago · 4 km deep · 37 km away
  40. 2.111 km ESE of East Foothills, California · 15119 days ago · 7 km deep · 30 km away
  41. 1.511 km ESE of East Foothills, California · 15119 days ago · 7 km deep · 31 km away
  42. 1.611 km ESE of East Foothills, California · 15119 days ago · 7 km deep · 31 km away
  43. 1.72 km SSE of San Ramon, California · 15119 days ago · 8 km deep · 25 km away
  44. 1.83 km ESE of Aromas, California · 15118 days ago · 7 km deep · 79 km away
  45. 2.18 km NE of San Martin, California · 15116 days ago · 8 km deep · 57 km away
  46. 1.69 km E of Gilroy, California · 15115 days ago · 10 km deep · 73 km away
  47. 2.0Northern California · 15115 days ago · 1 km deep · 53 km away
  48. 2.011 km NNW of Hollister, California · 15114 days ago · 4 km deep · 78 km away
  49. 1.611 km NNW of Hollister, California · 15113 days ago · 4 km deep · 78 km away
  50. 1.811 km NNW of Hollister, California · 15113 days ago · 3 km deep · 78 km away
  51. 1.74 km ENE of La Honda, California · 15112 days ago · 0 km deep · 36 km away
  52. 1.57 km ESE of East Foothills, California · 15112 days ago · 1 km deep · 26 km away
  53. 1.71 km NNE of El Cerrito, California · 15111 days ago · 5 km deep · 55 km away
  54. 1.715 km ENE of East Foothills, California · 15110 days ago · 5 km deep · 24 km away
  55. 1.79 km N of Morgan Hill, California · 15110 days ago · 5 km deep · 44 km away
  56. 1.812 km N of Morgan Hill, California · 15109 days ago · 6 km deep · 42 km away
  57. 2.32 km SW of Hollister, California · 15109 days ago · 6 km deep · 90 km away
  58. 1.88 km ENE of San Martin, California · 15109 days ago · 7 km deep · 59 km away
  59. 2.09 km ESE of East Foothills, California · 15108 days ago · 7 km deep · 27 km away
  60. 1.512 km SE of Livermore, California · 15108 days ago · 15 km deep · 22 km away

The first 60 of 94.

Before

  1. 1.75 km E of Fremont, California · 15141 days ago · 10 km deep · 0 km away
  2. 1.65 km E of Fremont, California · 15141 days ago · 9 km deep · 0 km away
  3. 1.86 km SSW of Sunol, California · 15141 days ago · 9 km deep · 0 km away
  4. 2.46 km E of Fremont, California · 15141 days ago · 9 km deep · 0 km away
  5. 2.412 km NNE of East Foothills, California · 15141 days ago · 8 km deep · 17 km away
  6. 1.617 km ENE of East Foothills, California · 15143 days ago · 5 km deep · 29 km away
  7. 2.011 km NNW of Hollister, California · 15143 days ago · 7 km deep · 78 km away
  8. 1.814 km N of Morgan Hill, California · 15144 days ago · 5 km deep · 40 km away
  9. 2.516 km N of Morgan Hill, California · 15145 days ago · 8 km deep · 38 km away
  10. 1.710 km SW of Ridgemark, California · 15145 days ago · 8 km deep · 97 km away
  11. 2.37 km ENE of San Martin, California · 15145 days ago · 3 km deep · 59 km away
  12. 1.613 km N of Morgan Hill, California · 15147 days ago · 3 km deep · 41 km away
  13. 1.710 km NNE of Morgan Hill, California · 15148 days ago · 3 km deep · 45 km away
  14. 1.71 km N of Mountain View, California · 15148 days ago · 6 km deep · 21 km away
  15. 1.77 km ENE of San Martin, California · 15148 days ago · 3 km deep · 60 km away
  16. 2.12 km ENE of Berkeley, California · 15148 days ago · 9 km deep · 47 km away
  17. 1.67 km ENE of San Martin, California · 15149 days ago · 3 km deep · 60 km away
  18. 2.514 km N of Morgan Hill, California · 15149 days ago · 4 km deep · 40 km away
  19. 1.65 km NE of East Foothills, California · 15149 days ago · 5 km deep · 20 km away
  20. 1.516 km E of Seven Trees, California · 15150 days ago · 5 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc45717. Read Tue, Sep 22, 2026, 4:04 PM UTC.