California earthquakes

M3.3 earthquake 7 km W of Cobb, California

A magnitude 3.3 earthquake struck 7 km W of Cobb, California on Sat, Mar 30, 1985, 2:52 PM PST (22:52 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.4 5 km SW of Cobb, California. This one was a foreshock.

Cobb 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
3.3 (ml), minor
Local time
UTC
1985-03-30 22:52:00 UTC
Depth
3.5 km (2.2 mi), shallow
Epicenter
38.817° N, 122.808° 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
Depth from
From location
Station coverage gap
35°
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: 179 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.96 km W of Cobb, California · 15142 days ago · 3 km deep · 1 km away
  2. 2.26 km W of Cobb, California · 15141 days ago · 3 km deep · 1 km away
  3. 3.26 km WSW of Cobb, California · 15141 days ago · 4 km deep · 2 km away
  4. 2.16 km WSW of Cobb, California · 15141 days ago · 3 km deep · 2 km away
  5. 1.56 km WSW of Cobb, California · 15141 days ago · 4 km deep · 2 km away
  6. 1.513 km ESE of Hidden Valley Lake, California · 15141 days ago · 5 km deep · 34 km away
  7. 2.08 km WSW of Cobb, California · 15141 days ago · 4 km deep · 3 km away
  8. 1.67 km WSW of Cobb, California · 15141 days ago · 1 km deep · 2 km away
  9. 2.24 km SW of Cobb, California · 15140 days ago · 1 km deep · 6 km away
  10. 2.29 km WSW of Cobb, California · 15140 days ago · 1 km deep · 3 km away
  11. 2.67 km WSW of Cobb, California · 15138 days ago · 1 km deep · 2 km away
  12. 2.57 km WSW of Cobb, California · 15138 days ago · 1 km deep · 2 km away
  13. 3.45 km SW of Cobb, California · 15137 days ago · 1 km deep · 4 km away
  14. 2.55 km SW of Cobb, California · 15137 days ago · 1 km deep · 4 km away
  15. 1.61 km S of Cotati, California · 15137 days ago · 17 km deep · 56 km away
  16. 1.67 km WSW of Cobb, California · 15137 days ago · 3 km deep · 3 km away
  17. 1.75 km W of Cobb, California · 15136 days ago · 4 km deep · 1 km away
  18. 2.23 km SW of Cobb, California · 15136 days ago · 1 km deep · 6 km away
  19. 2.0Northern California · 15136 days ago · 1 km deep · 2 km away
  20. 2.08 km WSW of Cobb, California · 15136 days ago · 3 km deep · 2 km away
  21. 2.58 km WNW of Guinda, California · 15136 days ago · 2 km deep · 46 km away
  22. 2.47 km WNW of Guinda, California · 15135 days ago · 1 km deep · 46 km away
  23. 2.28 km WSW of Cobb, California · 15135 days ago · 0 km deep · 2 km away
  24. 1.918 km NE of Upper Lake, California · 15135 days ago · 7 km deep · 53 km away
  25. 2.38 km WSW of Cobb, California · 15134 days ago · 3 km deep · 2 km away
  26. 2.0Northern California · 15133 days ago · 1 km deep · 2 km away
  27. 2.07 km W of Cobb, California · 15133 days ago · 1 km deep · 1 km away
  28. 2.221 km WSW of Williams, California · 15133 days ago · 0 km deep · 48 km away
  29. 3.710 km WSW of Meridian, California · 15132 days ago · 18 km deep · 75 km away
  30. 2.29 km WSW of Meridian, California · 15132 days ago · 12 km deep · 76 km away
  31. 1.67 km WSW of Cobb, California · 15132 days ago · 0 km deep · 2 km away
  32. 1.611 km W of Cobb, California · 15131 days ago · -1 km deep · 5 km away
  33. 1.77 km W of Cobb, California · 15131 days ago · 0 km deep · 0 km away
  34. 2.57 km W of Cobb, California · 15131 days ago · 1 km deep · 0 km away
  35. 2.57 km W of Cobb, California · 15131 days ago · 1 km deep · 0 km away
  36. 1.67 km W of Cobb, California · 15131 days ago · 1 km deep · 1 km away
  37. 2.57 km W of Cobb, California · 15131 days ago · 1 km deep · 1 km away
  38. 2.014 km N of Upper Lake, California · 15131 days ago · 5 km deep · 54 km away
  39. 2.88 km NNE of Arbuckle, California · 15131 days ago · 3 km deep · 75 km away
  40. 2.322 km WSW of Williams, California · 15130 days ago · 3 km deep · 47 km away
  41. 1.57 km W of Cobb, California · 15130 days ago · 1 km deep · 1 km away
  42. 1.66 km W of Cobb, California · 15129 days ago · 3 km deep · 1 km away
  43. 1.68 km WSW of Cobb, California · 15129 days ago · 3 km deep · 2 km away
  44. 2.41 km SSW of Green Valley, California · 15129 days ago · 12 km deep · 85 km away
  45. 2.02 km S of Green Valley, California · 15129 days ago · 11 km deep · 86 km away
  46. 2.58 km WSW of Meridian, California · 15129 days ago · 12 km deep · 77 km away
  47. 1.64 km SW of Hopland, California · 15129 days ago · 5 km deep · 33 km away
  48. 2.37 km WSW of Cobb, California · 15128 days ago · 4 km deep · 2 km away
  49. 1.66 km W of Cobb, California · 15128 days ago · 1 km deep · 1 km away
  50. 1.78 km WSW of Cobb, California · 15127 days ago · 3 km deep · 2 km away
  51. 1.85 km NNW of Geyserville, California · 15127 days ago · 5 km deep · 13 km away
  52. 1.97 km WSW of Cobb, California · 15125 days ago · 2 km deep · 2 km away
  53. 1.97 km WSW of Cobb, California · 15124 days ago · 1 km deep · 1 km away
  54. 2.16 km W of Cobb, California · 15124 days ago · 3 km deep · 1 km away
  55. 2.06 km W of Cobb, California · 15124 days ago · 3 km deep · 1 km away
  56. 2.28 km WSW of Cobb, California · 15123 days ago · 3 km deep · 2 km away
  57. 1.76 km NE of Brooktrails, California · 15123 days ago · 6 km deep · 86 km away
  58. 1.7Northern California · 15122 days ago · 2 km deep · 2 km away
  59. 2.1Northern California · 15122 days ago · 2 km deep · 30 km away
  60. 2.74 km W of Cobb, California · 15122 days ago · 0 km deep · 3 km away

The first 60 of 179.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc44999 (also filed as usp0002db3). Read Tue, Sep 22, 2026, 6:27 PM UTC.