California earthquakes

M1.7 earthquake 6 km W of Cobb, California

A magnitude 1.7 earthquake struck 6 km W of Cobb, California on Sun, Dec 8, 1985, 1:14 AM PST (09:14 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.3 9 km WSW 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
1.7 (md), micro
Local time
UTC
1985-12-08 09:14:26 UTC
Depth
1.7 km (1.1 mi), shallow
Epicenter
38.813° N, 122.798° 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 0.3 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
74°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 175 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.518 km ENE of Sea Ranch, California · 14888 days ago · 3 km deep · 41 km away
  2. 1.76 km W of Cobb, California · 14888 days ago · 3 km deep · 1 km away
  3. 2.39 km WSW of Cobb, California · 14887 days ago · 1 km deep · 3 km away
  4. 1.68 km WSW of Cobb, California · 14887 days ago · 0 km deep · 2 km away
  5. 1.57 km W of Cobb, California · 14887 days ago · 3 km deep · 1 km away
  6. 1.76 km W of Cobb, California · 14886 days ago · 1 km deep · 2 km away
  7. 1.78 km W of Cobb, California · 14885 days ago · 0 km deep · 2 km away
  8. 2.57 km W of Cobb, California · 14885 days ago · 1 km deep · 1 km away
  9. 1.78 km W of Cobb, California · 14885 days ago · 1 km deep · 2 km away
  10. 2.17 km WSW of Cobb, California · 14885 days ago · 1 km deep · 1 km away
  11. 1.94 km WNW of Cobb, California · 14885 days ago · 0 km deep · 4 km away
  12. 1.65 km W of Cobb, California · 14884 days ago · 1 km deep · 2 km away
  13. 1.57 km W of Cobb, California · 14884 days ago · 3 km deep · 1 km away
  14. 1.56 km W of Cobb, California · 14884 days ago · 1 km deep · 2 km away
  15. 1.77 km WSW of Cobb, California · 14884 days ago · 0 km deep · 1 km away
  16. 2.21 km S of Fulton, California · 14883 days ago · 6 km deep · 36 km away
  17. 1.722 km ENE of Potter Valley, California · 14882 days ago · 10 km deep · 66 km away
  18. 1.56 km W of Cobb, California · 14882 days ago · 3 km deep · 1 km away
  19. 1.77 km WSW of Cobb, California · 14882 days ago · 1 km deep · 1 km away
  20. 1.85 km W of Cobb, California · 14882 days ago · -1 km deep · 2 km away
  21. 1.97 km W of Cobb, California · 14881 days ago · 1 km deep · 2 km away
  22. 1.84 km SSW of Hopland, California · 14881 days ago · 6 km deep · 33 km away
  23. 1.910 km NNE of Brooktrails, California · 14880 days ago · 8 km deep · 93 km away
  24. 1.56 km W of Cobb, California · 14880 days ago · 3 km deep · 1 km away
  25. 1.84 km WSW of Cobb, California · 14880 days ago · 1 km deep · 3 km away
  26. 1.55 km WSW of Cobb, California · 14880 days ago · 0 km deep · 2 km away
  27. 1.64 km SSW of Hopland, California · 14880 days ago · 6 km deep · 33 km away
  28. 2.14 km SSW of Hopland, California · 14880 days ago · 6 km deep · 33 km away
  29. 2.09 km WSW of Cobb, California · 14879 days ago · 2 km deep · 3 km away
  30. 1.75 km W of Cobb, California · 14879 days ago · 1 km deep · 3 km away
  31. 1.99 km ENE of Hidden Valley Lake, California · 14879 days ago · 9 km deep · 30 km away
  32. 2.35 km SW of Cobb, California · 14879 days ago · 0 km deep · 5 km away
  33. 1.57 km WSW of Cobb, California · 14879 days ago · 2 km deep · 1 km away
  34. 2.34 km W of Cobb, California · 14878 days ago · 0 km deep · 2 km away
  35. 1.94 km W of Cobb, California · 14878 days ago · 1 km deep · 2 km away
  36. 1.64 km W of Cobb, California · 14878 days ago · -1 km deep · 3 km away
  37. 2.65 km SW of Cobb, California · 14878 days ago · 0 km deep · 4 km away
  38. 1.55 km SW of Cobb, California · 14878 days ago · 0 km deep · 4 km away
  39. 1.66 km WNW of Cobb, California · 14878 days ago · 1 km deep · 3 km away
  40. 1.57 km W of Cobb, California · 14878 days ago · 2 km deep · 2 km away
  41. 1.65 km SW of Cobb, California · 14877 days ago · 0 km deep · 3 km away
  42. 1.64 km S of Cobb, California · 14877 days ago · 1 km deep · 7 km away
  43. 1.64 km S of Cobb, California · 14877 days ago · 2 km deep · 8 km away
  44. 2.10 km SE of Redwood Valley, California · 14876 days ago · 5 km deep · 61 km away
  45. 1.95 km W of Cobb, California · 14876 days ago · 1 km deep · 2 km away
  46. 2.38 km W of Cobb, California · 14876 days ago · 1 km deep · 2 km away
  47. 1.67 km WSW of Cobb, California · 14876 days ago · 3 km deep · 1 km away
  48. 1.72 km WSW of Occidental, California · 14875 days ago · 2 km deep · 48 km away
  49. 2.06 km W of Cobb, California · 14875 days ago · 3 km deep · 1 km away
  50. 1.75 km WSW of Cobb, California · 14875 days ago · 0 km deep · 2 km away
  51. 1.66 km W of Cobb, California · 14875 days ago · 1 km deep · 2 km away
  52. 2.35 km SW of Cobb, California · 14875 days ago · 1 km deep · 3 km away
  53. 2.74 km WSW of Cobb, California · 14875 days ago · 1 km deep · 3 km away
  54. 2.45 km WSW of Cobb, California · 14875 days ago · 1 km deep · 2 km away
  55. 2.04 km SSW of Cobb, California · 14874 days ago · 0 km deep · 7 km away
  56. 1.65 km WNW of Cobb, California · 14874 days ago · 2 km deep · 3 km away
  57. 2.07 km W of Cobb, California · 14873 days ago · 3 km deep · 1 km away
  58. 2.06 km W of Cobb, California · 14872 days ago · 3 km deep · 1 km away
  59. 2.96 km W of Cobb, California · 14872 days ago · 0 km deep · 1 km away
  60. 2.46 km W of Cobb, California · 14872 days ago · 1 km deep · 1 km away

The first 60 of 175.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1133613. Read Tue, Sep 22, 2026, 7:47 PM UTC.