California earthquakes

M2.0 earthquake 9 km WSW of Cobb, California

A magnitude 2.0 earthquake struck 9 km WSW of Cobb, California on Fri, Dec 27, 1985, 1:15 AM PST (09:15 UTC), 2 km (1 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
2.0 (md), micro
Local time
UTC
1985-12-27 09:15:13 UTC
Depth
1.7 km (1.1 mi), shallow
Epicenter
38.797° N, 122.826° 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
±0.17
Depth from
From location
Station coverage gap
51°
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: 175 in the 60 days after this one and 127 in the 30 days before it.

After

  1. 1.75 km W of Cobb, California · 14885 days ago · 1 km deep · 5 km away
  2. 1.99 km ENE of Hidden Valley Lake, California · 14885 days ago · 9 km deep · 33 km away
  3. 2.35 km SW of Cobb, California · 14885 days ago · 0 km deep · 6 km away
  4. 1.57 km WSW of Cobb, California · 14885 days ago · 2 km deep · 2 km away
  5. 2.34 km W of Cobb, California · 14884 days ago · 0 km deep · 5 km away
  6. 1.94 km W of Cobb, California · 14884 days ago · 1 km deep · 5 km away
  7. 1.64 km W of Cobb, California · 14884 days ago · -1 km deep · 6 km away
  8. 2.65 km SW of Cobb, California · 14883 days ago · 0 km deep · 5 km away
  9. 1.55 km SW of Cobb, California · 14883 days ago · 0 km deep · 5 km away
  10. 1.66 km WNW of Cobb, California · 14883 days ago · 1 km deep · 5 km away
  11. 1.57 km W of Cobb, California · 14883 days ago · 2 km deep · 4 km away
  12. 1.65 km SW of Cobb, California · 14882 days ago · 0 km deep · 5 km away
  13. 1.64 km S of Cobb, California · 14882 days ago · 1 km deep · 9 km away
  14. 1.64 km S of Cobb, California · 14882 days ago · 2 km deep · 9 km away
  15. 2.10 km SE of Redwood Valley, California · 14882 days ago · 5 km deep · 61 km away
  16. 1.95 km W of Cobb, California · 14882 days ago · 1 km deep · 5 km away
  17. 2.38 km W of Cobb, California · 14881 days ago · 1 km deep · 3 km away
  18. 1.67 km WSW of Cobb, California · 14881 days ago · 3 km deep · 2 km away
  19. 1.72 km WSW of Occidental, California · 14881 days ago · 2 km deep · 46 km away
  20. 2.06 km W of Cobb, California · 14881 days ago · 3 km deep · 3 km away
  21. 1.75 km WSW of Cobb, California · 14881 days ago · 0 km deep · 4 km away
  22. 1.66 km W of Cobb, California · 14881 days ago · 1 km deep · 4 km away
  23. 2.35 km SW of Cobb, California · 14880 days ago · 1 km deep · 4 km away
  24. 2.74 km WSW of Cobb, California · 14880 days ago · 1 km deep · 5 km away
  25. 2.45 km WSW of Cobb, California · 14880 days ago · 1 km deep · 4 km away
  26. 2.04 km SSW of Cobb, California · 14880 days ago · 0 km deep · 8 km away
  27. 1.65 km WNW of Cobb, California · 14879 days ago · 2 km deep · 6 km away
  28. 2.07 km W of Cobb, California · 14879 days ago · 3 km deep · 3 km away
  29. 2.06 km W of Cobb, California · 14878 days ago · 3 km deep · 3 km away
  30. 2.96 km W of Cobb, California · 14878 days ago · 0 km deep · 4 km away
  31. 2.46 km W of Cobb, California · 14878 days ago · 1 km deep · 4 km away
  32. 2.35 km SW of Cobb, California · 14877 days ago · 1 km deep · 4 km away
  33. 2.98 km WSW of Cobb, California · 14877 days ago · 0 km deep · 1 km away
  34. 1.68 km WSW of Cobb, California · 14877 days ago · 0 km deep · 2 km away
  35. 2.06 km WSW of Cobb, California · 14877 days ago · 0 km deep · 3 km away
  36. 1.75 km SW of Cobb, California · 14876 days ago · 0 km deep · 4 km away
  37. 2.010 km NNE of Hopland, California · 14876 days ago · 6 km deep · 36 km away
  38. 1.66 km W of Cobb, California · 14875 days ago · 3 km deep · 4 km away
  39. 1.612 km NE of Angwin, California · 14875 days ago · 11 km deep · 42 km away
  40. 2.16 km SW of Cobb, California · 14873 days ago · -1 km deep · 4 km away
  41. 1.716 km NNE of Upper Lake, California · 14873 days ago · 6 km deep · 55 km away
  42. 2.18 km ENE of Lower Lake, California · 14873 days ago · 0 km deep · 31 km away
  43. 1.919 km ENE of Potter Valley, California · 14873 days ago · 6 km deep · 66 km away
  44. 1.625 km SE of Covelo, California · 14873 days ago · 4 km deep · 93 km away
  45. 1.74 km NW of Redwood Valley, California · 14873 days ago · 5 km deep · 66 km away
  46. 2.45 km NE of Rohnert Park, California · 14873 days ago · 5 km deep · 50 km away
  47. 1.71 km E of Calpella, California · 14873 days ago · 6 km deep · 57 km away
  48. 3.68 km WSW of Kelseyville, California · 14872 days ago · 4 km deep · 18 km away
  49. 1.58 km WNW of Cobb, California · 14872 days ago · 6 km deep · 5 km away
  50. 1.94 km NW of Redwood Valley, California · 14871 days ago · -1 km deep · 66 km away
  51. 1.64 km SE of Larkfield-Wikiup, California · 14871 days ago · 12 km deep · 36 km away
  52. 2.55 km SW of Cobb, California · 14870 days ago · 0 km deep · 6 km away
  53. 1.64 km WSW of Cobb, California · 14870 days ago · 1 km deep · 5 km away
  54. 3.04 km WSW of Cobb, California · 14870 days ago · 1 km deep · 5 km away
  55. 1.69 km W of Cobb, California · 14870 days ago · 0 km deep · 2 km away
  56. 1.64 km WSW of Cobb, California · 14870 days ago · 1 km deep · 5 km away
  57. 2.06 km W of Cobb, California · 14870 days ago · 2 km deep · 3 km away
  58. 1.68 km W of Cobb, California · 14870 days ago · 4 km deep · 3 km away
  59. 2.66 km W of Cobb, California · 14869 days ago · 1 km deep · 3 km away
  60. 1.76 km W of Cobb, California · 14869 days ago · 2 km deep · 3 km away

The first 60 of 175.

Before

  1. 2.14 km SSW of Hopland, California · 14885 days ago · 6 km deep · 32 km away
  2. 1.64 km SSW of Hopland, California · 14885 days ago · 6 km deep · 32 km away
  3. 1.55 km WSW of Cobb, California · 14886 days ago · 0 km deep · 4 km away
  4. 1.84 km WSW of Cobb, California · 14886 days ago · 1 km deep · 5 km away
  5. 1.56 km W of Cobb, California · 14886 days ago · 3 km deep · 3 km away
  6. 1.910 km NNE of Brooktrails, California · 14886 days ago · 8 km deep · 93 km away
  7. 1.84 km SSW of Hopland, California · 14887 days ago · 6 km deep · 31 km away
  8. 1.97 km W of Cobb, California · 14887 days ago · 1 km deep · 3 km away
  9. 1.85 km W of Cobb, California · 14887 days ago · -1 km deep · 5 km away
  10. 1.77 km WSW of Cobb, California · 14887 days ago · 1 km deep · 2 km away
  11. 1.56 km W of Cobb, California · 14887 days ago · 3 km deep · 4 km away
  12. 1.722 km ENE of Potter Valley, California · 14888 days ago · 10 km deep · 68 km away
  13. 2.21 km S of Fulton, California · 14889 days ago · 6 km deep · 35 km away
  14. 1.77 km WSW of Cobb, California · 14890 days ago · 0 km deep · 2 km away
  15. 1.56 km W of Cobb, California · 14890 days ago · 1 km deep · 5 km away
  16. 1.57 km W of Cobb, California · 14890 days ago · 3 km deep · 2 km away
  17. 1.65 km W of Cobb, California · 14890 days ago · 1 km deep · 5 km away
  18. 1.94 km WNW of Cobb, California · 14890 days ago · 0 km deep · 7 km away
  19. 2.17 km WSW of Cobb, California · 14890 days ago · 1 km deep · 2 km away
  20. 1.78 km W of Cobb, California · 14890 days ago · 1 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc62280. Read Mon, Sep 28, 2026, 9:47 AM UTC.