California earthquakes

M2.7 earthquake 6 km SW of Cobb, California

A magnitude 2.7 earthquake struck 6 km SW of Cobb, California on Wed, Dec 17, 1986, 12:56 PM PST (20:56 UTC), 0 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
1986-12-17 20:56:50 UTC
Depth
0.1 km (0.0 mi), shallow
Epicenter
38.783° N, 122.772° 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
±0.16
Depth from
From location
Station coverage gap
47°
Stations used
28

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. 1.78 km ESE of Hidden Valley Lake, California · 14517 days ago · 4 km deep · 26 km away
  2. 1.610 km ESE of Hidden Valley Lake, California · 14517 days ago · 7 km deep · 28 km away
  3. 1.74 km WSW of Cobb, California · 14516 days ago · 1 km deep · 2 km away
  4. 1.613 km E of Comptche, California · 14516 days ago · 3 km deep · 79 km away
  5. 1.79 km W of Cobb, California · 14516 days ago · -1 km deep · 6 km away
  6. 2.16 km WSW of Cobb, California · 14516 days ago · 0 km deep · 3 km away
  7. 1.76 km WSW of Cobb, California · 14515 days ago · -1 km deep · 4 km away
  8. 1.68 km E of Willits, California · 14515 days ago · 9 km deep · 81 km away
  9. 2.25 km WSW of Cobb, California · 14515 days ago · 0 km deep · 2 km away
  10. 3.06 km W of Cobb, California · 14515 days ago · 2 km deep · 5 km away
  11. 2.17 km W of Cobb, California · 14514 days ago · 2 km deep · 5 km away
  12. 1.821 km ENE of Potter Valley, California · 14513 days ago · 0 km deep · 68 km away
  13. 1.98 km E of Hidden Valley Lake, California · 14512 days ago · 9 km deep · 27 km away
  14. 1.79 km W of Cobb, California · 14512 days ago · 0 km deep · 7 km away
  15. 1.79 km W of Cobb, California · 14512 days ago · 0 km deep · 7 km away
  16. 1.94 km WNW of Cobb, California · 14512 days ago · 2 km deep · 6 km away
  17. 2.111 km W of Cobb, California · 14512 days ago · 4 km deep · 8 km away
  18. 1.84 km WSW of Cobb, California · 14511 days ago · 0 km deep · 2 km away
  19. 1.55 km WSW of Cobb, California · 14511 days ago · 3 km deep · 2 km away
  20. 2.27 km W of Cobb, California · 14510 days ago · 4 km deep · 5 km away
  21. 1.77 km W of Cobb, California · 14510 days ago · 3 km deep · 5 km away
  22. 1.85 km SW of Cobb, California · 14510 days ago · -1 km deep · 1 km away
  23. 2.27 km W of Cobb, California · 14510 days ago · 1 km deep · 6 km away
  24. 3.17 km W of Cobb, California · 14510 days ago · 1 km deep · 5 km away
  25. 2.87 km W of Cobb, California · 14510 days ago · -1 km deep · 6 km away
  26. 1.77 km W of Cobb, California · 14510 days ago · 1 km deep · 6 km away
  27. 1.77 km W of Cobb, California · 14510 days ago · -1 km deep · 4 km away
  28. 2.07 km W of Cobb, California · 14510 days ago · 0 km deep · 6 km away
  29. 1.88 km ESE of Hidden Valley Lake, California · 14509 days ago · 7 km deep · 27 km away
  30. 1.92 km E of Rohnert Park, California · 14509 days ago · 3 km deep · 50 km away
  31. 1.87 km W of Cobb, California · 14509 days ago · 2 km deep · 5 km away
  32. 2.42 km E of Rohnert Park, California · 14508 days ago · 4 km deep · 50 km away
  33. 1.82 km E of Rohnert Park, California · 14508 days ago · 3 km deep · 50 km away
  34. 2.12 km E of Rohnert Park, California · 14508 days ago · 4 km deep · 50 km away
  35. 1.72 km E of Rohnert Park, California · 14508 days ago · 2 km deep · 50 km away
  36. 2.22 km E of Rohnert Park, California · 14508 days ago · 3 km deep · 50 km away
  37. 1.63 km SSE of Roseland, California · 14508 days ago · 3 km deep · 44 km away
  38. 2.57 km W of Cobb, California · 14507 days ago · 4 km deep · 5 km away
  39. 2.17 km W of Cobb, California · 14507 days ago · 4 km deep · 5 km away
  40. 2.25 km SW of Yountville, California · 14507 days ago · 6 km deep · 56 km away
  41. 2.39 km SE of Knights Landing, California · 14507 days ago · 16 km deep · 97 km away
  42. 1.66 km W of Cobb, California · 14507 days ago · 1 km deep · 5 km away
  43. 1.96 km W of Cobb, California · 14506 days ago · 3 km deep · 5 km away
  44. 2.15 km SW of Cobb, California · 14506 days ago · 0 km deep · 0 km away
  45. 1.68 km W of Cobb, California · 14505 days ago · 1 km deep · 6 km away
  46. 2.45 km SW of Cobb, California · 14505 days ago · 1 km deep · 0 km away
  47. 1.717 km WSW of Elk Creek, California · 14504 days ago · 3 km deep · 83 km away
  48. 1.66 km W of Cobb, California · 14504 days ago · 3 km deep · 5 km away
  49. 1.74 km WNW of Cobb, California · 14504 days ago · 2 km deep · 6 km away
  50. 2.04 km WSW of North Lakeport, California · 14503 days ago · 4 km deep · 36 km away
  51. 3.45 km SW of Cobb, California · 14503 days ago · 0 km deep · 1 km away
  52. 1.96 km SW of Cobb, California · 14503 days ago · 1 km deep · 0 km away
  53. 2.64 km NNW of Benicia, California · 14502 days ago · 11 km deep · 93 km away
  54. 1.64 km NNE of Crockett, California · 14502 days ago · 7 km deep · 92 km away
  55. 1.74 km NNE of Crockett, California · 14502 days ago · 8 km deep · 93 km away
  56. 2.47 km E of Hidden Valley Lake, California · 14501 days ago · 8 km deep · 26 km away
  57. 2.14 km WSW of Cobb, California · 14501 days ago · 1 km deep · 2 km away
  58. 2.49 km SE of Knights Landing, California · 14501 days ago · 14 km deep · 98 km away
  59. 1.75 km ESE of Talmage, California · 14501 days ago · 5 km deep · 47 km away
  60. 1.54 km N of Port Costa, California · 14501 days ago · 13 km deep · 93 km away

The first 60 of 175.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc90459. Read Tue, Sep 22, 2026, 6:39 AM UTC.