California earthquakes

M1.9 earthquake 5 km SW of Cobb, California

A magnitude 1.9 earthquake struck 5 km SW of Cobb, California on Thu, Mar 27, 1986, 8:45 PM PST (04:45 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M2.0 7 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
1.9 (md), micro
Local time
UTC
1986-03-28 04:45:31 UTC
Depth
-0.8 km (-0.5 mi), shallow
Epicenter
38.786° N, 122.768° 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, 0.8 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
74°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.512 km NE of Comptche, California · 14786 days ago · 5 km deep · 88 km away
  2. 1.57 km W of Cobb, California · 14786 days ago · 3 km deep · 5 km away
  3. 2.07 km W of Cobb, California · 14786 days ago · 3 km deep · 5 km away
  4. 1.66 km W of Cobb, California · 14786 days ago · 1 km deep · 6 km away
  5. 1.52 km E of Clear Lake Riviera, California · 14786 days ago · 3 km deep · 20 km away
  6. 2.116 km N of Upper Lake, California · 14785 days ago · 7 km deep · 60 km away
  7. 2.37 km WSW of Cobb, California · 14785 days ago · 0 km deep · 3 km away
  8. 1.65 km SW of Cobb, California · 14785 days ago · 1 km deep · 1 km away
  9. 1.55 km WSW of Cobb, California · 14785 days ago · 1 km deep · 2 km away
  10. 3.08 km W of Cobb, California · 14784 days ago · 1 km deep · 7 km away
  11. 1.75 km SW of Cobb, California · 14784 days ago · 0 km deep · 1 km away
  12. 1.69 km W of Cobb, California · 14784 days ago · 0 km deep · 6 km away
  13. 1.88 km WSW of Cobb, California · 14784 days ago · 0 km deep · 5 km away
  14. 1.811 km W of Cobb, California · 14784 days ago · -1 km deep · 8 km away
  15. 2.56 km W of Cobb, California · 14783 days ago · 3 km deep · 5 km away
  16. 1.55 km SW of Cobb, California · 14783 days ago · 1 km deep · 1 km away
  17. 2.77 km W of Cobb, California · 14783 days ago · 4 km deep · 5 km away
  18. 1.86 km W of Cobb, California · 14783 days ago · 3 km deep · 5 km away
  19. 2.16 km W of Cobb, California · 14783 days ago · 3 km deep · 5 km away
  20. 2.19 km SE of Willits, California · 14782 days ago · 5 km deep · 77 km away
  21. 1.76 km W of Cobb, California · 14782 days ago · 2 km deep · 4 km away
  22. 1.76 km SW of Cobb, California · 14782 days ago · 0 km deep · 1 km away
  23. 1.77 km W of Cobb, California · 14781 days ago · 3 km deep · 5 km away
  24. 2.04 km WSW of Cobb, California · 14781 days ago · 1 km deep · 2 km away
  25. 2.17 km WSW of Cobb, California · 14781 days ago · 1 km deep · 3 km away
  26. 1.76 km WSW of Cobb, California · 14781 days ago · 1 km deep · 3 km away
  27. 2.57 km WSW of Cobb, California · 14781 days ago · 0 km deep · 3 km away
  28. 1.76 km W of Cobb, California · 14780 days ago · 2 km deep · 4 km away
  29. 1.77 km WSW of Cobb, California · 14780 days ago · 0 km deep · 4 km away
  30. 1.77 km WSW of Cobb, California · 14780 days ago · 4 km deep · 4 km away
  31. 1.97 km WSW of Cobb, California · 14779 days ago · 1 km deep · 4 km away
  32. 1.75 km S of Cobb, California · 14779 days ago · 2 km deep · 4 km away
  33. 1.56 km W of Cobb, California · 14776 days ago · 2 km deep · 4 km away
  34. 2.06 km W of Cobb, California · 14776 days ago · 2 km deep · 4 km away
  35. 2.415 km W of Guinda, California · 14775 days ago · 13 km deep · 35 km away
  36. 1.55 km W of Cobb, California · 14775 days ago · 0 km deep · 4 km away
  37. 2.18 km WSW of Cobb, California · 14775 days ago · -1 km deep · 5 km away
  38. 1.78 km W of Cobb, California · 14774 days ago · 2 km deep · 6 km away
  39. 1.96 km SW of Cobb, California · 14774 days ago · 1 km deep · 1 km away
  40. 1.84 km WSW of Cobb, California · 14774 days ago · 1 km deep · 3 km away
  41. 1.96 km W of Cobb, California · 14774 days ago · 2 km deep · 4 km away
  42. 2.111 km ESE of Willits, California · 14773 days ago · 7 km deep · 76 km away
  43. 1.77 km WSW of Cobb, California · 14773 days ago · 4 km deep · 4 km away
  44. 1.66 km WSW of Cobb, California · 14773 days ago · 0 km deep · 2 km away
  45. 1.65 km WSW of Cobb, California · 14773 days ago · -1 km deep · 2 km away
  46. 1.73 km NNW of Clear Lake Riviera, California · 14772 days ago · -1 km deep · 22 km away
  47. 1.97 km W of Cobb, California · 14771 days ago · 3 km deep · 5 km away
  48. 2.910 km NW of Philo, California · 14770 days ago · 5 km deep · 76 km away
  49. 1.57 km W of Cobb, California · 14769 days ago · 4 km deep · 5 km away
  50. 1.94 km W of Cobb, California · 14769 days ago · 1 km deep · 3 km away
  51. 1.77 km W of Cobb, California · 14769 days ago · 3 km deep · 5 km away
  52. 1.710 km SW of Boonville, California · 14768 days ago · 1 km deep · 63 km away
  53. 2.72 km SW of Green Valley, California · 14768 days ago · 6 km deep · 79 km away
  54. 1.710 km NNW of Redwood Valley, California · 14767 days ago · 7 km deep · 75 km away
  55. 2.46 km W of Cobb, California · 14767 days ago · 4 km deep · 5 km away
  56. 1.87 km W of Cobb, California · 14766 days ago · 3 km deep · 5 km away
  57. 1.66 km W of Cobb, California · 14766 days ago · 3 km deep · 5 km away
  58. 1.610 km WNW of Potter Valley, California · 14766 days ago · 7 km deep · 75 km away
  59. 2.58 km WSW of Cobb, California · 14766 days ago · 3 km deep · 4 km away
  60. 1.76 km SW of Cobb, California · 14766 days ago · 0 km deep · 1 km away

The first 60 of 171.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1136818. Read Wed, Sep 23, 2026, 5:14 AM UTC.