California earthquakes

M1.5 earthquake 4 km SW of Cobb, California

A magnitude 1.5 earthquake struck 4 km SW of Cobb, California on Sat, Dec 13, 1986, 12:14 AM PST (08:14 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.9 8 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
1.5 (md), micro
Local time
UTC
1986-12-13 08:14:33 UTC
Depth
2.8 km (1.7 mi), shallow
Epicenter
38.799° N, 122.764° 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 1.0 km horizontally, 4.0 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
119°
Stations used
8

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. 1.98 km W of Cobb, California · 14520 days ago · 0 km deep · 6 km away
  2. 1.65 km SW of Cobb, California · 14520 days ago · -1 km deep · 1 km away
  3. 1.57 km E of Hidden Valley Lake, California · 14520 days ago · 8 km deep · 25 km away
  4. 1.67 km W of Hopland, California · 14519 days ago · 4 km deep · 42 km away
  5. 1.77 km W of Cobb, California · 14519 days ago · -1 km deep · 5 km away
  6. 1.95 km WSW of Cobb, California · 14519 days ago · 1 km deep · 2 km away
  7. 1.614 km ESE of Hidden Valley Lake, California · 14519 days ago · 1 km deep · 32 km away
  8. 2.19 km W of Cobb, California · 14519 days ago · 0 km deep · 6 km away
  9. 1.96 km WNW of Cobb, California · 14519 days ago · 0 km deep · 5 km away
  10. 2.15 km ENE of Willits, California · 14518 days ago · 2 km deep · 84 km away
  11. 1.75 km ENE of Willits, California · 14518 days ago · 2 km deep · 84 km away
  12. 1.65 km SW of Cobb, California · 14518 days ago · -1 km deep · 2 km away
  13. 2.07 km E of Willits, California · 14518 days ago · 7 km deep · 80 km away
  14. 2.44 km WNW of Cobb, California · 14518 days ago · 0 km deep · 5 km away
  15. 2.49 km ESE of Hidden Valley Lake, California · 14518 days ago · 8 km deep · 27 km away
  16. 2.39 km WSW of Cobb, California · 14517 days ago · 2 km deep · 5 km away
  17. 1.78 km ESE of Hidden Valley Lake, California · 14517 days ago · 4 km deep · 26 km away
  18. 1.610 km ESE of Hidden Valley Lake, California · 14517 days ago · 7 km deep · 28 km away
  19. 1.74 km WSW of Cobb, California · 14516 days ago · 1 km deep · 1 km away
  20. 1.613 km E of Comptche, California · 14516 days ago · 3 km deep · 78 km away
  21. 1.79 km W of Cobb, California · 14516 days ago · -1 km deep · 6 km away
  22. 2.16 km WSW of Cobb, California · 14516 days ago · 0 km deep · 3 km away
  23. 1.76 km WSW of Cobb, California · 14516 days ago · -1 km deep · 3 km away
  24. 1.68 km E of Willits, California · 14516 days ago · 9 km deep · 80 km away
  25. 2.25 km WSW of Cobb, California · 14515 days ago · 0 km deep · 1 km away
  26. 3.06 km W of Cobb, California · 14515 days ago · 2 km deep · 4 km away
  27. 2.17 km W of Cobb, California · 14514 days ago · 2 km deep · 5 km away
  28. 1.821 km ENE of Potter Valley, California · 14513 days ago · 0 km deep · 66 km away
  29. 1.98 km E of Hidden Valley Lake, California · 14512 days ago · 9 km deep · 26 km away
  30. 1.79 km W of Cobb, California · 14512 days ago · 0 km deep · 7 km away
  31. 1.79 km W of Cobb, California · 14512 days ago · 0 km deep · 7 km away
  32. 1.94 km WNW of Cobb, California · 14512 days ago · 2 km deep · 5 km away
  33. 2.111 km W of Cobb, California · 14512 days ago · 4 km deep · 8 km away
  34. 1.84 km WSW of Cobb, California · 14511 days ago · 0 km deep · 0 km away
  35. 1.55 km WSW of Cobb, California · 14511 days ago · 3 km deep · 2 km away
  36. 2.27 km W of Cobb, California · 14510 days ago · 4 km deep · 4 km away
  37. 1.77 km W of Cobb, California · 14510 days ago · 3 km deep · 5 km away
  38. 1.85 km SW of Cobb, California · 14510 days ago · -1 km deep · 1 km away
  39. 2.27 km W of Cobb, California · 14510 days ago · 1 km deep · 5 km away
  40. 3.17 km W of Cobb, California · 14510 days ago · 1 km deep · 4 km away
  41. 2.87 km W of Cobb, California · 14510 days ago · -1 km deep · 5 km away
  42. 1.77 km W of Cobb, California · 14510 days ago · 1 km deep · 5 km away
  43. 1.77 km W of Cobb, California · 14510 days ago · -1 km deep · 4 km away
  44. 2.07 km W of Cobb, California · 14510 days ago · 0 km deep · 5 km away
  45. 1.88 km ESE of Hidden Valley Lake, California · 14509 days ago · 7 km deep · 27 km away
  46. 1.92 km E of Rohnert Park, California · 14509 days ago · 3 km deep · 52 km away
  47. 1.87 km W of Cobb, California · 14509 days ago · 2 km deep · 4 km away
  48. 2.42 km E of Rohnert Park, California · 14508 days ago · 4 km deep · 52 km away
  49. 1.82 km E of Rohnert Park, California · 14508 days ago · 3 km deep · 52 km away
  50. 2.12 km E of Rohnert Park, California · 14508 days ago · 4 km deep · 52 km away
  51. 1.72 km E of Rohnert Park, California · 14508 days ago · 2 km deep · 52 km away
  52. 2.22 km E of Rohnert Park, California · 14508 days ago · 3 km deep · 52 km away
  53. 1.63 km SSE of Roseland, California · 14508 days ago · 3 km deep · 46 km away
  54. 2.57 km W of Cobb, California · 14508 days ago · 4 km deep · 4 km away
  55. 2.17 km W of Cobb, California · 14507 days ago · 4 km deep · 4 km away
  56. 2.25 km SW of Yountville, California · 14507 days ago · 6 km deep · 57 km away
  57. 2.39 km SE of Knights Landing, California · 14507 days ago · 16 km deep · 97 km away
  58. 1.66 km W of Cobb, California · 14507 days ago · 1 km deep · 4 km away
  59. 1.96 km W of Cobb, California · 14506 days ago · 3 km deep · 4 km away
  60. 2.15 km SW of Cobb, California · 14506 days ago · 0 km deep · 2 km away

The first 60 of 175.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1145833. Read Tue, Sep 22, 2026, 10:01 AM UTC.