California earthquakes

M1.9 earthquake 4 km WNW of Cobb, California

A magnitude 1.9 earthquake struck 4 km WNW of Cobb, California on Sat, Dec 21, 1985, 11:46 PM PST (07:46 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.6 8 km WSW of Kelseyville, 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
1.9 (md), micro
Local time
UTC
1985-12-22 07:46:16 UTC
Depth
0.4 km (0.3 mi), shallow
Epicenter
38.834° N, 122.767° 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
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
43°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 177 in the 60 days after this one and 131 in the 30 days before it.

After

  1. 1.65 km W of Cobb, California · 14890 days ago · 1 km deep · 2 km away
  2. 1.57 km W of Cobb, California · 14889 days ago · 3 km deep · 4 km away
  3. 1.56 km W of Cobb, California · 14889 days ago · 1 km deep · 2 km away
  4. 1.77 km WSW of Cobb, California · 14889 days ago · 0 km deep · 5 km away
  5. 2.21 km S of Fulton, California · 14888 days ago · 6 km deep · 39 km away
  6. 1.722 km ENE of Potter Valley, California · 14888 days ago · 10 km deep · 64 km away
  7. 1.56 km W of Cobb, California · 14887 days ago · 3 km deep · 3 km away
  8. 1.77 km WSW of Cobb, California · 14887 days ago · 1 km deep · 5 km away
  9. 1.85 km W of Cobb, California · 14887 days ago · -1 km deep · 2 km away
  10. 1.97 km W of Cobb, California · 14886 days ago · 1 km deep · 4 km away
  11. 1.84 km SSW of Hopland, California · 14886 days ago · 6 km deep · 34 km away
  12. 1.910 km NNE of Brooktrails, California · 14886 days ago · 8 km deep · 92 km away
  13. 1.56 km W of Cobb, California · 14886 days ago · 3 km deep · 3 km away
  14. 1.84 km WSW of Cobb, California · 14885 days ago · 1 km deep · 3 km away
  15. 1.55 km WSW of Cobb, California · 14885 days ago · 0 km deep · 4 km away
  16. 1.64 km SSW of Hopland, California · 14885 days ago · 6 km deep · 35 km away
  17. 2.14 km SSW of Hopland, California · 14885 days ago · 6 km deep · 35 km away
  18. 2.09 km WSW of Cobb, California · 14885 days ago · 2 km deep · 7 km away
  19. 1.75 km W of Cobb, California · 14885 days ago · 1 km deep · 1 km away
  20. 1.99 km ENE of Hidden Valley Lake, California · 14884 days ago · 9 km deep · 27 km away
  21. 2.35 km SW of Cobb, California · 14884 days ago · 0 km deep · 6 km away
  22. 1.57 km WSW of Cobb, California · 14884 days ago · 2 km deep · 5 km away
  23. 2.34 km W of Cobb, California · 14883 days ago · 0 km deep · 2 km away
  24. 1.94 km W of Cobb, California · 14883 days ago · 1 km deep · 2 km away
  25. 1.64 km W of Cobb, California · 14883 days ago · -1 km deep · 1 km away
  26. 2.65 km SW of Cobb, California · 14883 days ago · 0 km deep · 5 km away
  27. 1.55 km SW of Cobb, California · 14883 days ago · 0 km deep · 5 km away
  28. 1.66 km WNW of Cobb, California · 14883 days ago · 1 km deep · 2 km away
  29. 1.57 km W of Cobb, California · 14883 days ago · 2 km deep · 4 km away
  30. 1.65 km SW of Cobb, California · 14882 days ago · 0 km deep · 4 km away
  31. 1.64 km S of Cobb, California · 14882 days ago · 1 km deep · 7 km away
  32. 1.64 km S of Cobb, California · 14882 days ago · 2 km deep · 7 km away
  33. 2.10 km SE of Redwood Valley, California · 14881 days ago · 5 km deep · 61 km away
  34. 1.95 km W of Cobb, California · 14881 days ago · 1 km deep · 2 km away
  35. 2.38 km W of Cobb, California · 14881 days ago · 1 km deep · 4 km away
  36. 1.67 km WSW of Cobb, California · 14881 days ago · 3 km deep · 5 km away
  37. 1.72 km WSW of Occidental, California · 14881 days ago · 2 km deep · 51 km away
  38. 2.06 km W of Cobb, California · 14880 days ago · 3 km deep · 3 km away
  39. 1.75 km WSW of Cobb, California · 14880 days ago · 0 km deep · 4 km away
  40. 1.66 km W of Cobb, California · 14880 days ago · 1 km deep · 3 km away
  41. 2.35 km SW of Cobb, California · 14880 days ago · 1 km deep · 5 km away
  42. 2.74 km WSW of Cobb, California · 14880 days ago · 1 km deep · 4 km away
  43. 2.45 km WSW of Cobb, California · 14880 days ago · 1 km deep · 3 km away
  44. 2.04 km SSW of Cobb, California · 14880 days ago · 0 km deep · 7 km away
  45. 1.65 km WNW of Cobb, California · 14879 days ago · 2 km deep · 1 km away
  46. 2.07 km W of Cobb, California · 14879 days ago · 3 km deep · 4 km away
  47. 2.06 km W of Cobb, California · 14878 days ago · 3 km deep · 3 km away
  48. 2.96 km W of Cobb, California · 14877 days ago · 0 km deep · 3 km away
  49. 2.46 km W of Cobb, California · 14877 days ago · 1 km deep · 3 km away
  50. 2.35 km SW of Cobb, California · 14877 days ago · 1 km deep · 5 km away
  51. 2.98 km WSW of Cobb, California · 14877 days ago · 0 km deep · 5 km away
  52. 1.68 km WSW of Cobb, California · 14877 days ago · 0 km deep · 5 km away
  53. 2.06 km WSW of Cobb, California · 14876 days ago · 0 km deep · 5 km away
  54. 1.75 km SW of Cobb, California · 14876 days ago · 0 km deep · 5 km away
  55. 2.010 km NNE of Hopland, California · 14876 days ago · 6 km deep · 36 km away
  56. 1.66 km W of Cobb, California · 14874 days ago · 3 km deep · 3 km away
  57. 1.612 km NE of Angwin, California · 14874 days ago · 11 km deep · 39 km away
  58. 2.16 km SW of Cobb, California · 14873 days ago · -1 km deep · 6 km away
  59. 1.716 km NNE of Upper Lake, California · 14873 days ago · 6 km deep · 52 km away
  60. 2.18 km ENE of Lower Lake, California · 14873 days ago · 0 km deep · 24 km away

The first 60 of 177.

Before

  1. 2.17 km WSW of Cobb, California · 14890 days ago · 1 km deep · 4 km away
  2. 1.78 km W of Cobb, California · 14890 days ago · 1 km deep · 4 km away
  3. 2.57 km W of Cobb, California · 14890 days ago · 1 km deep · 4 km away
  4. 1.78 km W of Cobb, California · 14890 days ago · 0 km deep · 5 km away
  5. 1.76 km W of Cobb, California · 14891 days ago · 1 km deep · 3 km away
  6. 1.57 km W of Cobb, California · 14892 days ago · 3 km deep · 4 km away
  7. 1.68 km WSW of Cobb, California · 14892 days ago · 0 km deep · 5 km away
  8. 2.39 km WSW of Cobb, California · 14893 days ago · 1 km deep · 7 km away
  9. 1.76 km W of Cobb, California · 14893 days ago · 3 km deep · 3 km away
  10. 1.518 km ENE of Sea Ranch, California · 14893 days ago · 3 km deep · 44 km away
  11. 1.77 km WSW of Cobb, California · 14894 days ago · 1 km deep · 4 km away
  12. 1.67 km W of Cobb, California · 14894 days ago · 4 km deep · 4 km away
  13. 1.54 km WSW of Cobb, California · 14894 days ago · 1 km deep · 3 km away
  14. 2.05 km SW of Cobb, California · 14895 days ago · 1 km deep · 6 km away
  15. 1.96 km W of Cobb, California · 14895 days ago · 3 km deep · 3 km away
  16. 1.68 km W of Cobb, California · 14896 days ago · 1 km deep · 4 km away
  17. 2.25 km SW of Cobb, California · 14896 days ago · 0 km deep · 6 km away
  18. 1.916 km NE of Lucerne, California · 14896 days ago · 5 km deep · 42 km away
  19. 1.66 km WSW of Cobb, California · 14896 days ago · 3 km deep · 4 km away
  20. 1.67 km E of Willits, California · 14897 days ago · 8 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc62013. Read Sun, Sep 27, 2026, 11:22 PM UTC.