California earthquakes

M2.1 earthquake 7 km WSW of Cobb, California

A magnitude 2.1 earthquake struck 7 km WSW of Cobb, California on Wed, Jul 9, 1986, 5:34 AM PDT (12:34 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M4.7 5 km NNE of Brooktrails, 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
2.1 (md), micro
Local time
UTC
1986-07-09 12:34:13 UTC
Depth
1.5 km (0.9 mi), shallow
Epicenter
38.803° N, 122.805° 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, 0.3 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
102°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 174 in the 60 days after this one and 77 in the 30 days before it.

After

  1. 1.95 km WSW of Cobb, California · 14693 days ago · 1 km deep · 2 km away
  2. 2.56 km W of Cobb, California · 14693 days ago · 4 km deep · 2 km away
  3. 1.95 km SW of Hopland, California · 14693 days ago · 4 km deep · 34 km away
  4. 1.65 km WSW of Cobb, California · 14692 days ago · 3 km deep · 2 km away
  5. 1.8Northern California · 14692 days ago · -1 km deep · 4 km away
  6. 1.77 km W of Cobb, California · 14692 days ago · 3 km deep · 1 km away
  7. 1.77 km W of Cobb, California · 14691 days ago · 1 km deep · 2 km away
  8. 2.014 km NNE of Angwin, California · 14691 days ago · 1 km deep · 38 km away
  9. 3.36 km W of Cobb, California · 14691 days ago · 1 km deep · 3 km away
  10. 2.16 km W of Cobb, California · 14691 days ago · -1 km deep · 3 km away
  11. 1.66 km W of Cobb, California · 14691 days ago · 0 km deep · 3 km away
  12. 2.07 km WSW of Cobb, California · 14691 days ago · 4 km deep · 1 km away
  13. 1.75 km WSW of Cobb, California · 14690 days ago · 3 km deep · 2 km away
  14. 2.05 km SW of Cobb, California · 14690 days ago · 0 km deep · 5 km away
  15. 1.75 km SW of Cobb, California · 14689 days ago · 0 km deep · 4 km away
  16. 1.57 km W of Cobb, California · 14689 days ago · 0 km deep · 3 km away
  17. 1.76 km W of Cobb, California · 14689 days ago · 3 km deep · 2 km away
  18. 2.45 km WSW of Cobb, California · 14688 days ago · 0 km deep · 2 km away
  19. 1.85 km WSW of Cobb, California · 14688 days ago · 1 km deep · 2 km away
  20. 2.14 km SW of Cobb, California · 14688 days ago · 0 km deep · 3 km away
  21. 1.69 km WSW of Cobb, California · 14688 days ago · 2 km deep · 2 km away
  22. 1.811 km ESE of Hopland, California · 14687 days ago · -1 km deep · 23 km away
  23. 2.16 km WSW of Cobb, California · 14687 days ago · 0 km deep · 2 km away
  24. 2.34 km WSW of Cobb, California · 14687 days ago · 1 km deep · 3 km away
  25. 2.50 km NNW of Larkfield-Wikiup, California · 14686 days ago · 2 km deep · 32 km away
  26. 1.77 km WSW of Cobb, California · 14686 days ago · 3 km deep · 1 km away
  27. 1.930 km NE of Potter Valley, California · 14685 days ago · 8 km deep · 81 km away
  28. 2.15 km SW of Cobb, California · 14685 days ago · 0 km deep · 3 km away
  29. 2.2Northern California · 14685 days ago · 4 km deep · 4 km away
  30. 2.65 km SW of Cobb, California · 14685 days ago · 0 km deep · 3 km away
  31. 2.45 km SW of Cobb, California · 14685 days ago · -1 km deep · 3 km away
  32. 1.66 km SW of Cobb, California · 14684 days ago · 4 km deep · 3 km away
  33. 1.66 km W of Cobb, California · 14684 days ago · 3 km deep · 2 km away
  34. 1.87 km W of Cobb, California · 14684 days ago · 4 km deep · 2 km away
  35. 1.95 km W of Cobb, California · 14683 days ago · -1 km deep · 3 km away
  36. 1.98 km W of Cobb, California · 14682 days ago · 1 km deep · 3 km away
  37. 1.78 km WSW of Cobb, California · 14682 days ago · 3 km deep · 1 km away
  38. 1.65 km WSW of Cobb, California · 14682 days ago · 1 km deep · 2 km away
  39. 2.119 km ENE of Potter Valley, California · 14681 days ago · 5 km deep · 65 km away
  40. 2.720 km ENE of Potter Valley, California · 14681 days ago · 6 km deep · 65 km away
  41. 1.95 km WSW of Cobb, California · 14681 days ago · 4 km deep · 2 km away
  42. 2.44 km SW of Cobb, California · 14681 days ago · 0 km deep · 4 km away
  43. 2.02 km ESE of Calpella, California · 14681 days ago · 4 km deep · 57 km away
  44. 1.9near the coast of Northern California · 14680 days ago · 3 km deep · 83 km away
  45. 1.85 km W of Cobb, California · 14680 days ago · -1 km deep · 3 km away
  46. 2.86 km W of Cobb, California · 14680 days ago · -1 km deep · 2 km away
  47. 1.56 km W of Cobb, California · 14680 days ago · -1 km deep · 3 km away
  48. 1.97 km WSW of Cobb, California · 14679 days ago · 3 km deep · 0 km away
  49. 1.85 km SW of Cobb, California · 14678 days ago · -1 km deep · 3 km away
  50. 1.98 km WSW of Cobb, California · 14678 days ago · 1 km deep · 1 km away
  51. 1.65 km SW of Cobb, California · 14678 days ago · -1 km deep · 3 km away
  52. 1.811 km WSW of Cobb, California · 14678 days ago · 3 km deep · 4 km away
  53. 2.16 km WSW of Cobb, California · 14677 days ago · 1 km deep · 1 km away
  54. 2.68 km W of Cobb, California · 14676 days ago · 1 km deep · 2 km away
  55. 1.98 km W of Cobb, California · 14676 days ago · 1 km deep · 3 km away
  56. 1.610 km NNE of Larkfield-Wikiup, California · 14676 days ago · 6 km deep · 24 km away
  57. 2.414 km S of Albion, California · 14675 days ago · 2 km deep · 88 km away
  58. 1.64 km SSW of Cobb, California · 14675 days ago · -1 km deep · 6 km away
  59. 2.07 km E of Willits, California · 14675 days ago · 7 km deep · 77 km away
  60. 1.86 km W of Cobb, California · 14675 days ago · 3 km deep · 2 km away

The first 60 of 174.

Before

  1. 1.89 km ESE of Willits, California · 14694 days ago · 8 km deep · 75 km away
  2. 2.27 km W of Cobb, California · 14694 days ago · 2 km deep · 3 km away
  3. 1.77 km W of Cobb, California · 14695 days ago · 1 km deep · 2 km away
  4. 2.35 km W of Forestville, California · 14695 days ago · 0 km deep · 39 km away
  5. 1.77 km WSW of Cobb, California · 14695 days ago · 4 km deep · 0 km away
  6. 1.65 km W of Cobb, California · 14696 days ago · 0 km deep · 2 km away
  7. 3.25 km SW of Cobb, California · 14696 days ago · 1 km deep · 3 km away
  8. 1.53 km N of Larkfield-Wikiup, California · 14696 days ago · 6 km deep · 29 km away
  9. 1.56 km SW of Cobb, California · 14696 days ago · 1 km deep · 3 km away
  10. 1.66 km WNW of Cobb, California · 14697 days ago · 1 km deep · 4 km away
  11. 1.75 km WNW of Cobb, California · 14697 days ago · -1 km deep · 4 km away
  12. 1.85 km W of Cobb, California · 14697 days ago · -1 km deep · 3 km away
  13. 1.56 km W of Cobb, California · 14698 days ago · 3 km deep · 2 km away
  14. 1.86 km WSW of Cobb, California · 14698 days ago · 0 km deep · 1 km away
  15. 2.60 km NE of Larkfield-Wikiup, California · 14699 days ago · 3 km deep · 32 km away
  16. 1.52 km SSE of Cloverdale, California · 14699 days ago · 5 km deep · 18 km away
  17. 2.06 km WSW of Cobb, California · 14700 days ago · 4 km deep · 1 km away
  18. 2.27 km W of Cobb, California · 14700 days ago · 1 km deep · 1 km away
  19. 1.77 km W of Cobb, California · 14700 days ago · 3 km deep · 1 km away
  20. 2.99 km ESE of Willits, California · 14701 days ago · 6 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc76087. Read Wed, Sep 30, 2026, 9:19 PM UTC.