California earthquakes

M1.7 earthquake 6 km W of Cobb, California

A magnitude 1.7 earthquake struck 6 km W of Cobb, California on Fri, Dec 20, 1985, 6:08 AM PST (14:08 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M1.9 5 km W 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
1985-12-20 14:08:46 UTC
Depth
1.1 km (0.7 mi), shallow
Epicenter
38.831° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
48°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 174 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.95 km W of Cobb, California · 14876 days ago · 1 km deep · 1 km away
  2. 2.38 km W of Cobb, California · 14876 days ago · 1 km deep · 2 km away
  3. 1.67 km WSW of Cobb, California · 14876 days ago · 3 km deep · 3 km away
  4. 1.72 km WSW of Occidental, California · 14875 days ago · 2 km deep · 50 km away
  5. 2.06 km W of Cobb, California · 14875 days ago · 3 km deep · 1 km away
  6. 1.75 km WSW of Cobb, California · 14875 days ago · 0 km deep · 4 km away
  7. 1.66 km W of Cobb, California · 14875 days ago · 1 km deep · 0 km away
  8. 2.35 km SW of Cobb, California · 14875 days ago · 1 km deep · 5 km away
  9. 2.74 km WSW of Cobb, California · 14875 days ago · 1 km deep · 4 km away
  10. 2.45 km WSW of Cobb, California · 14875 days ago · 1 km deep · 3 km away
  11. 2.04 km SSW of Cobb, California · 14874 days ago · 0 km deep · 8 km away
  12. 1.65 km WNW of Cobb, California · 14874 days ago · 2 km deep · 2 km away
  13. 2.07 km W of Cobb, California · 14873 days ago · 3 km deep · 2 km away
  14. 2.06 km W of Cobb, California · 14872 days ago · 3 km deep · 1 km away
  15. 2.96 km W of Cobb, California · 14872 days ago · 0 km deep · 1 km away
  16. 2.46 km W of Cobb, California · 14872 days ago · 1 km deep · 1 km away
  17. 2.35 km SW of Cobb, California · 14872 days ago · 1 km deep · 5 km away
  18. 2.98 km WSW of Cobb, California · 14872 days ago · 0 km deep · 3 km away
  19. 1.68 km WSW of Cobb, California · 14872 days ago · 0 km deep · 3 km away
  20. 2.06 km WSW of Cobb, California · 14871 days ago · 0 km deep · 4 km away
  21. 1.75 km SW of Cobb, California · 14871 days ago · 0 km deep · 5 km away
  22. 2.010 km NNE of Hopland, California · 14870 days ago · 6 km deep · 34 km away
  23. 1.66 km W of Cobb, California · 14869 days ago · 3 km deep · 1 km away
  24. 1.612 km NE of Angwin, California · 14869 days ago · 11 km deep · 42 km away
  25. 2.16 km SW of Cobb, California · 14868 days ago · -1 km deep · 5 km away
  26. 1.716 km NNE of Upper Lake, California · 14868 days ago · 6 km deep · 52 km away
  27. 2.18 km ENE of Lower Lake, California · 14868 days ago · 0 km deep · 27 km away
  28. 1.919 km ENE of Potter Valley, California · 14868 days ago · 6 km deep · 63 km away
  29. 1.625 km SE of Covelo, California · 14867 days ago · 4 km deep · 90 km away
  30. 1.74 km NW of Redwood Valley, California · 14867 days ago · 5 km deep · 64 km away
  31. 2.45 km NE of Rohnert Park, California · 14867 days ago · 5 km deep · 53 km away
  32. 1.71 km E of Calpella, California · 14867 days ago · 6 km deep · 56 km away
  33. 3.68 km WSW of Kelseyville, California · 14866 days ago · 4 km deep · 16 km away
  34. 1.58 km WNW of Cobb, California · 14866 days ago · 6 km deep · 2 km away
  35. 1.94 km NW of Redwood Valley, California · 14866 days ago · -1 km deep · 64 km away
  36. 1.64 km SE of Larkfield-Wikiup, California · 14865 days ago · 12 km deep · 39 km away
  37. 2.55 km SW of Cobb, California · 14865 days ago · 0 km deep · 6 km away
  38. 1.64 km WSW of Cobb, California · 14864 days ago · 1 km deep · 4 km away
  39. 3.04 km WSW of Cobb, California · 14864 days ago · 1 km deep · 4 km away
  40. 1.69 km W of Cobb, California · 14864 days ago · 0 km deep · 3 km away
  41. 1.64 km WSW of Cobb, California · 14864 days ago · 1 km deep · 3 km away
  42. 2.06 km W of Cobb, California · 14864 days ago · 2 km deep · 2 km away
  43. 1.68 km W of Cobb, California · 14864 days ago · 4 km deep · 2 km away
  44. 2.66 km W of Cobb, California · 14864 days ago · 1 km deep · 2 km away
  45. 1.76 km W of Cobb, California · 14863 days ago · 2 km deep · 2 km away
  46. 1.86 km W of Cobb, California · 14863 days ago · 3 km deep · 1 km away
  47. 1.54 km WSW of Cobb, California · 14862 days ago · 1 km deep · 4 km away
  48. 1.67 km W of Cobb, California · 14862 days ago · 3 km deep · 2 km away
  49. 1.65 km W of Cobb, California · 14862 days ago · 2 km deep · 1 km away
  50. 1.66 km W of Cobb, California · 14862 days ago · 3 km deep · 1 km away
  51. 1.84 km SW of Cobb, California · 14862 days ago · 0 km deep · 5 km away
  52. 2.29 km WSW of Cobb, California · 14861 days ago · 1 km deep · 5 km away
  53. 2.26 km W of Cobb, California · 14861 days ago · 3 km deep · 1 km away
  54. 1.55 km SW of Cobb, California · 14860 days ago · 0 km deep · 5 km away
  55. 1.612 km NNE of Brooktrails, California · 14860 days ago · 4 km deep · 93 km away
  56. 1.55 km SW of Cobb, California · 14860 days ago · 2 km deep · 5 km away
  57. 1.76 km WSW of Cobb, California · 14860 days ago · 3 km deep · 3 km away
  58. 2.39 km SW of Hopland, California · 14860 days ago · -1 km deep · 36 km away
  59. 2.99 km SW of Hopland, California · 14860 days ago · -1 km deep · 36 km away
  60. 1.79 km W of Cobb, California · 14860 days ago · 1 km deep · 4 km away

The first 60 of 174.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc61912. Read Tue, Sep 22, 2026, 8:25 PM UTC.