California earthquakes

M2.7 earthquake 5 km WSW of Cobb, California

A magnitude 2.7 earthquake struck 5 km WSW of Cobb, California on Tue, Dec 2, 1986, 1:51 AM PST (09:51 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M3.0 6 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
2.7 (md), micro
Local time
UTC
1986-12-02 09:51:16 UTC
Depth
-0.7 km (-0.4 mi), shallow
Epicenter
38.803° N, 122.778° 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, 0.6 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
58°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.57 km WSW of Cobb, California · 14525 days ago · 1 km deep · 2 km away
  2. 2.57 km E of Hidden Valley Lake, California · 14525 days ago · 9 km deep · 27 km away
  3. 1.78 km ESE of Hidden Valley Lake, California · 14524 days ago · 7 km deep · 27 km away
  4. 1.88 km ESE of Hidden Valley Lake, California · 14524 days ago · 7 km deep · 27 km away
  5. 1.718 km ENE of Potter Valley, California · 14524 days ago · 5 km deep · 62 km away
  6. 2.76 km SW of Cobb, California · 14523 days ago · 0 km deep · 2 km away
  7. 1.77 km E of Geyserville, California · 14523 days ago · 2 km deep · 12 km away
  8. 1.98 km ESE of Hidden Valley Lake, California · 14523 days ago · 7 km deep · 27 km away
  9. 1.69 km NW of Cobb, California · 14523 days ago · 1 km deep · 8 km away
  10. 1.98 km ESE of Hidden Valley Lake, California · 14523 days ago · 7 km deep · 27 km away
  11. 1.96 km ENE of Sonoma, California · 14522 days ago · 10 km deep · 64 km away
  12. 1.66 km W of Cobb, California · 14522 days ago · 3 km deep · 3 km away
  13. 2.5Northern California · 14522 days ago · 9 km deep · 75 km away
  14. 1.87 km WSW of Cobb, California · 14521 days ago · 0 km deep · 3 km away
  15. 2.58 km E of Willits, California · 14521 days ago · 8 km deep · 79 km away
  16. 1.88 km ESE of Hidden Valley Lake, California · 14521 days ago · 6 km deep · 27 km away
  17. 2.17 km ENE of Napa, California · 14521 days ago · 4 km deep · 72 km away
  18. 1.86 km N of Green Valley, California · 14521 days ago · 10 km deep · 76 km away
  19. 2.16 km SW of Cobb, California · 14521 days ago · 1 km deep · 2 km away
  20. 1.66 km W of Cobb, California · 14521 days ago · 3 km deep · 2 km away
  21. 1.75 km W of Cobb, California · 14521 days ago · -1 km deep · 3 km away
  22. 2.06 km W of Cobb, California · 14520 days ago · 0 km deep · 3 km away
  23. 1.86 km WNW of Cobb, California · 14520 days ago · -1 km deep · 4 km away
  24. 1.56 km W of Cobb, California · 14520 days ago · 1 km deep · 3 km away
  25. 1.76 km W of Cobb, California · 14520 days ago · -1 km deep · 3 km away
  26. 1.98 km W of Cobb, California · 14520 days ago · 0 km deep · 4 km away
  27. 1.65 km SW of Cobb, California · 14519 days ago · -1 km deep · 1 km away
  28. 1.57 km E of Hidden Valley Lake, California · 14519 days ago · 8 km deep · 27 km away
  29. 1.67 km W of Hopland, California · 14519 days ago · 4 km deep · 41 km away
  30. 1.77 km W of Cobb, California · 14519 days ago · -1 km deep · 4 km away
  31. 1.95 km WSW of Cobb, California · 14519 days ago · 1 km deep · 0 km away
  32. 1.614 km ESE of Hidden Valley Lake, California · 14519 days ago · 1 km deep · 33 km away
  33. 2.19 km W of Cobb, California · 14519 days ago · 0 km deep · 5 km away
  34. 1.96 km WNW of Cobb, California · 14519 days ago · 0 km deep · 4 km away
  35. 2.15 km ENE of Willits, California · 14518 days ago · 2 km deep · 83 km away
  36. 1.75 km ENE of Willits, California · 14518 days ago · 2 km deep · 83 km away
  37. 1.65 km SW of Cobb, California · 14518 days ago · -1 km deep · 3 km away
  38. 2.07 km E of Willits, California · 14518 days ago · 7 km deep · 79 km away
  39. 2.44 km WNW of Cobb, California · 14518 days ago · 0 km deep · 4 km away
  40. 2.49 km ESE of Hidden Valley Lake, California · 14517 days ago · 8 km deep · 28 km away
  41. 2.39 km WSW of Cobb, California · 14517 days ago · 2 km deep · 4 km away
  42. 1.78 km ESE of Hidden Valley Lake, California · 14517 days ago · 4 km deep · 27 km away
  43. 1.610 km ESE of Hidden Valley Lake, California · 14517 days ago · 7 km deep · 29 km away
  44. 1.74 km WSW of Cobb, California · 14516 days ago · 1 km deep · 0 km away
  45. 1.613 km E of Comptche, California · 14516 days ago · 3 km deep · 77 km away
  46. 1.79 km W of Cobb, California · 14516 days ago · -1 km deep · 5 km away
  47. 2.16 km WSW of Cobb, California · 14516 days ago · 0 km deep · 2 km away
  48. 1.76 km WSW of Cobb, California · 14515 days ago · -1 km deep · 2 km away
  49. 1.68 km E of Willits, California · 14515 days ago · 9 km deep · 79 km away
  50. 2.25 km WSW of Cobb, California · 14515 days ago · 0 km deep · 1 km away
  51. 3.06 km W of Cobb, California · 14515 days ago · 2 km deep · 3 km away
  52. 2.17 km W of Cobb, California · 14514 days ago · 2 km deep · 3 km away
  53. 1.821 km ENE of Potter Valley, California · 14513 days ago · 0 km deep · 65 km away
  54. 1.98 km E of Hidden Valley Lake, California · 14512 days ago · 9 km deep · 27 km away
  55. 1.79 km W of Cobb, California · 14512 days ago · 0 km deep · 5 km away
  56. 1.79 km W of Cobb, California · 14512 days ago · 0 km deep · 5 km away
  57. 1.94 km WNW of Cobb, California · 14512 days ago · 2 km deep · 4 km away
  58. 2.111 km W of Cobb, California · 14512 days ago · 4 km deep · 7 km away
  59. 1.84 km WSW of Cobb, California · 14511 days ago · 0 km deep · 1 km away
  60. 1.55 km WSW of Cobb, California · 14511 days ago · 3 km deep · 1 km away

The first 60 of 178.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc89161. Read Tue, Sep 22, 2026, 6:31 AM UTC.