California earthquakes

M1.8 earthquake 6 km W of Cobb, California

A magnitude 1.8 earthquake struck 6 km W of Cobb, California on Thu, Apr 3, 1986, 5:04 AM PST (13:04 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.1 9 km SE of Willits, 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
1.8 (md), micro
Local time
UTC
1986-04-03 13:04:51 UTC
Depth
3.5 km (2.2 mi), shallow
Epicenter
38.820° N, 122.801° 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
±0.07
Depth from
From location
Station coverage gap
46°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 172 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.19 km SE of Willits, California · 14782 days ago · 5 km deep · 72 km away
  2. 1.76 km W of Cobb, California · 14782 days ago · 2 km deep · 1 km away
  3. 1.76 km SW of Cobb, California · 14782 days ago · 0 km deep · 5 km away
  4. 1.77 km W of Cobb, California · 14781 days ago · 3 km deep · 1 km away
  5. 2.04 km WSW of Cobb, California · 14781 days ago · 1 km deep · 3 km away
  6. 2.17 km WSW of Cobb, California · 14781 days ago · 1 km deep · 2 km away
  7. 1.76 km WSW of Cobb, California · 14781 days ago · 1 km deep · 2 km away
  8. 2.57 km WSW of Cobb, California · 14781 days ago · 0 km deep · 2 km away
  9. 1.614 km SE of Laytonville, California · 14781 days ago · 7 km deep · 99 km away
  10. 1.76 km W of Cobb, California · 14780 days ago · 2 km deep · 0 km away
  11. 1.77 km WSW of Cobb, California · 14780 days ago · 0 km deep · 2 km away
  12. 1.77 km WSW of Cobb, California · 14780 days ago · 4 km deep · 3 km away
  13. 1.97 km WSW of Cobb, California · 14779 days ago · 1 km deep · 2 km away
  14. 1.75 km S of Cobb, California · 14779 days ago · 2 km deep · 9 km away
  15. 1.56 km W of Cobb, California · 14776 days ago · 2 km deep · 1 km away
  16. 2.06 km W of Cobb, California · 14776 days ago · 2 km deep · 1 km away
  17. 2.415 km W of Guinda, California · 14775 days ago · 13 km deep · 37 km away
  18. 1.55 km W of Cobb, California · 14775 days ago · 0 km deep · 2 km away
  19. 2.18 km WSW of Cobb, California · 14775 days ago · -1 km deep · 2 km away
  20. 1.78 km W of Cobb, California · 14774 days ago · 2 km deep · 2 km away
  21. 1.96 km SW of Cobb, California · 14774 days ago · 1 km deep · 5 km away
  22. 1.84 km WSW of Cobb, California · 14774 days ago · 1 km deep · 2 km away
  23. 1.96 km W of Cobb, California · 14774 days ago · 2 km deep · 1 km away
  24. 2.111 km ESE of Willits, California · 14773 days ago · 7 km deep · 72 km away
  25. 1.77 km WSW of Cobb, California · 14773 days ago · 4 km deep · 2 km away
  26. 1.66 km WSW of Cobb, California · 14773 days ago · 0 km deep · 2 km away
  27. 1.65 km WSW of Cobb, California · 14773 days ago · -1 km deep · 3 km away
  28. 1.73 km NNW of Clear Lake Riviera, California · 14772 days ago · -1 km deep · 19 km away
  29. 1.97 km W of Cobb, California · 14771 days ago · 3 km deep · 1 km away
  30. 2.910 km NW of Philo, California · 14770 days ago · 5 km deep · 72 km away
  31. 1.57 km W of Cobb, California · 14769 days ago · 4 km deep · 1 km away
  32. 1.94 km W of Cobb, California · 14769 days ago · 1 km deep · 2 km away
  33. 1.77 km W of Cobb, California · 14769 days ago · 3 km deep · 1 km away
  34. 1.710 km SW of Boonville, California · 14768 days ago · 1 km deep · 60 km away
  35. 2.72 km SW of Green Valley, California · 14768 days ago · 6 km deep · 84 km away
  36. 1.513 km SE of Laytonville, California · 14767 days ago · 5 km deep · 100 km away
  37. 1.710 km NNW of Redwood Valley, California · 14767 days ago · 7 km deep · 70 km away
  38. 2.46 km W of Cobb, California · 14767 days ago · 4 km deep · 0 km away
  39. 1.87 km W of Cobb, California · 14766 days ago · 3 km deep · 1 km away
  40. 1.66 km W of Cobb, California · 14766 days ago · 3 km deep · 0 km away
  41. 1.610 km WNW of Potter Valley, California · 14766 days ago · 7 km deep · 70 km away
  42. 2.58 km WSW of Cobb, California · 14766 days ago · 3 km deep · 3 km away
  43. 1.76 km SW of Cobb, California · 14766 days ago · 0 km deep · 5 km away
  44. 1.67 km WSW of Cobb, California · 14765 days ago · 3 km deep · 2 km away
  45. 2.35 km WSW of Cobb, California · 14765 days ago · 0 km deep · 3 km away
  46. 1.85 km WSW of Cobb, California · 14765 days ago · 0 km deep · 3 km away
  47. 2.211 km NE of Healdsburg, California · 14765 days ago · 3 km deep · 16 km away
  48. 1.94 km SSW of Cobb, California · 14764 days ago · 2 km deep · 6 km away
  49. 1.86 km WSW of Cobb, California · 14764 days ago · 2 km deep · 4 km away
  50. 1.78 km WSW of Cobb, California · 14764 days ago · 2 km deep · 3 km away
  51. 1.65 km W of Cobb, California · 14764 days ago · 0 km deep · 1 km away
  52. 1.65 km W of Cobb, California · 14764 days ago · 0 km deep · 2 km away
  53. 1.84 km W of Cobb, California · 14764 days ago · -1 km deep · 2 km away
  54. 1.76 km SW of Cobb, California · 14764 days ago · -1 km deep · 4 km away
  55. 2.24 km WNW of Cobb, California · 14763 days ago · 2 km deep · 2 km away
  56. 1.77 km W of Cobb, California · 14763 days ago · 2 km deep · 1 km away
  57. 1.93 km SW of Cobb, California · 14763 days ago · 1 km deep · 5 km away
  58. 1.82 km NNE of Talmage, California · 14762 days ago · 4 km deep · 49 km away
  59. 1.629 km NE of Potter Valley, California · 14761 days ago · 4 km deep · 79 km away
  60. 1.610 km NE of Talmage, California · 14760 days ago · 3 km deep · 49 km away

The first 60 of 172.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc69331. Read Wed, Sep 23, 2026, 4:23 AM UTC.