California earthquakes

M2.3 earthquake 6 km W of Cobb, California

A magnitude 2.3 earthquake struck 6 km W of Cobb, California on Sat, Oct 4, 1986, 8:18 PM PDT (03:18 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M4.0 4 km SW of Sea Ranch, 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
2.3 (md), micro
Local time
UTC
1986-10-05 03:18:24 UTC
Depth
1.9 km (1.2 mi), shallow
Epicenter
38.822° N, 122.796° 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
±0.07
Depth from
From location
Station coverage gap
53°
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: 148 in the 60 days after this one and 80 in the 30 days before it.

After

  1. 2.19 km WNW of Bolinas, California · 14605 days ago · 7 km deep · 98 km away
  2. 1.94 km E of Santa Rosa, California · 14605 days ago · 8 km deep · 45 km away
  3. 2.04 km NE of Windsor, California · 14605 days ago · 0 km deep · 27 km away
  4. 2.01 km WSW of Angwin, California · 14605 days ago · 4 km deep · 40 km away
  5. 2.16 km W of Cobb, California · 14604 days ago · 2 km deep · 1 km away
  6. 2.86 km W of Cobb, California · 14604 days ago · 2 km deep · 1 km away
  7. 2.06 km W of Cobb, California · 14604 days ago · 2 km deep · 1 km away
  8. 1.77 km WSW of Cobb, California · 14604 days ago · 3 km deep · 4 km away
  9. 2.110 km N of Cloverdale, California · 14604 days ago · 4 km deep · 21 km away
  10. 1.813 km S of Comptche, California · 14603 days ago · 2 km deep · 77 km away
  11. 1.6Northern California · 14603 days ago · 0 km deep · 4 km away
  12. 1.86 km W of Cobb, California · 14603 days ago · 3 km deep · 0 km away
  13. 1.67 km W of Cobb, California · 14603 days ago · 3 km deep · 1 km away
  14. 2.05 km SW of Cobb, California · 14602 days ago · 1 km deep · 4 km away
  15. 1.714 km NE of Willits, California · 14600 days ago · 4 km deep · 82 km away
  16. 1.64 km W of Angwin, California · 14600 days ago · 4 km deep · 38 km away
  17. 2.617 km SSE of Covelo, California · 14600 days ago · 4 km deep · 97 km away
  18. 1.99 km SSW of Lodoga, California · 14600 days ago · 20 km deep · 50 km away
  19. 1.65 km SW of Cobb, California · 14599 days ago · 3 km deep · 4 km away
  20. 4.04 km SW of Sea Ranch, California · 14598 days ago · 6 km deep · 63 km away
  21. 2.01 km W of Sea Ranch, California · 14598 days ago · 4 km deep · 60 km away
  22. 1.57 km SSW of Clear Lake Riviera, California · 14598 days ago · 4 km deep · 9 km away
  23. 1.77 km WSW of Cobb, California · 14598 days ago · 4 km deep · 3 km away
  24. 1.57 km W of Cobb, California · 14598 days ago · 2 km deep · 2 km away
  25. 1.77 km W of Cobb, California · 14596 days ago · 3 km deep · 1 km away
  26. 2.05 km WSW of Cobb, California · 14595 days ago · -1 km deep · 3 km away
  27. 1.63 km W of Geyserville, California · 14592 days ago · 2 km deep · 18 km away
  28. 1.810 km ENE of Hidden Valley Lake, California · 14592 days ago · 5 km deep · 29 km away
  29. 1.98 km NNE of Geyserville, California · 14592 days ago · 13 km deep · 8 km away
  30. 2.67 km W of Cobb, California · 14592 days ago · 4 km deep · 1 km away
  31. 1.818 km NNE of Upper Lake, California · 14592 days ago · 0 km deep · 54 km away
  32. 2.218 km NNE of Upper Lake, California · 14592 days ago · 7 km deep · 53 km away
  33. 1.61 km WSW of Kelseyville, California · 14592 days ago · 3 km deep · 18 km away
  34. 1.611 km N of Cloverdale, California · 14592 days ago · 1 km deep · 20 km away
  35. 2.86 km W of Cobb, California · 14591 days ago · 4 km deep · 0 km away
  36. 1.96 km W of Cobb, California · 14591 days ago · 3 km deep · 0 km away
  37. 2.67 km NNE of Hopland, California · 14591 days ago · 2 km deep · 34 km away
  38. 1.99 km WSW of Cobb, California · 14590 days ago · 1 km deep · 3 km away
  39. 1.86 km W of Cobb, California · 14590 days ago · 3 km deep · 0 km away
  40. 2.35 km SW of Cobb, California · 14590 days ago · 1 km deep · 6 km away
  41. 1.98 km E of Lower Lake, California · 14590 days ago · 1 km deep · 27 km away
  42. 2.119 km ENE of Brooktrails, California · 14589 days ago · 4 km deep · 86 km away
  43. 2.19 km WSW of Cobb, California · 14589 days ago · -1 km deep · 4 km away
  44. 2.26 km WSW of Cobb, California · 14588 days ago · 3 km deep · 2 km away
  45. 1.7Northern California · 14587 days ago · 1 km deep · 3 km away
  46. 1.85 km W of Cobb, California · 14586 days ago · 2 km deep · 1 km away
  47. 2.010 km SSE of Moskowite Corner, California · 14586 days ago · 4 km deep · 76 km away
  48. 1.97 km WSW of Cobb, California · 14585 days ago · 1 km deep · 2 km away
  49. 1.67 km WSW of Cobb, California · 14585 days ago · 2 km deep · 2 km away
  50. 1.65 km WSW of Cobb, California · 14584 days ago · 0 km deep · 3 km away
  51. 2.07 km ENE of Clearlake, California · 14583 days ago · 13 km deep · 28 km away
  52. 3.15 km W of Cobb, California · 14582 days ago · 1 km deep · 1 km away
  53. 1.714 km E of Angwin, California · 14581 days ago · 5 km deep · 51 km away
  54. 1.718 km S of Covelo, California · 14581 days ago · 4 km deep · 97 km away
  55. 2.27 km WSW of Cobb, California · 14581 days ago · 0 km deep · 2 km away
  56. 1.62 km WNW of Sea Ranch, California · 14580 days ago · 3 km deep · 60 km away
  57. 1.67 km W of Cobb, California · 14579 days ago · 6 km deep · 1 km away
  58. 1.54 km WNW of Cobb, California · 14579 days ago · -1 km deep · 3 km away
  59. 3.02 km SW of Cobb, California · 14578 days ago · 2 km deep · 5 km away
  60. 1.64 km WSW of Cobb, California · 14578 days ago · 2 km deep · 2 km away

The first 60 of 148.

Before

  1. 2.615 km ENE of Potter Valley, California · 14607 days ago · 6 km deep · 60 km away
  2. 1.919 km ENE of Potter Valley, California · 14608 days ago · 4 km deep · 62 km away
  3. 3.020 km ENE of Potter Valley, California · 14608 days ago · 14 km deep · 61 km away
  4. 1.514 km ESE of Hidden Valley Lake, California · 14608 days ago · 3 km deep · 34 km away
  5. 2.25 km E of Redwood Valley, California · 14609 days ago · 1 km deep · 57 km away
  6. 2.024 km NNE of Potter Valley, California · 14609 days ago · 8 km deep · 79 km away
  7. 2.15 km WSW of Cobb, California · 14609 days ago · -1 km deep · 4 km away
  8. 1.95 km WSW of Cobb, California · 14609 days ago · 2 km deep · 2 km away
  9. 1.97 km W of Cobb, California · 14609 days ago · 1 km deep · 1 km away
  10. 2.47 km W of Cobb, California · 14609 days ago · 1 km deep · 1 km away
  11. 1.84 km WSW of Cobb, California · 14610 days ago · -1 km deep · 2 km away
  12. 2.26 km SSW of Kelseyville, California · 14610 days ago · 39 km deep · 12 km away
  13. 2.44 km WSW of Lakeport, California · 14610 days ago · 14 km deep · 26 km away
  14. 2.26 km WSW of Cobb, California · 14610 days ago · 0 km deep · 2 km away
  15. 1.97 km W of Cobb, California · 14610 days ago · 3 km deep · 1 km away
  16. 2.66 km W of Cobb, California · 14611 days ago · 3 km deep · 0 km away
  17. 1.95 km E of Penngrove, California · 14612 days ago · 4 km deep · 60 km away
  18. 2.86 km WSW of Cobb, California · 14612 days ago · 1 km deep · 2 km away
  19. 1.9Northern California · 14612 days ago · 1 km deep · 1 km away
  20. 2.97 km W of Cobb, CA · 14612 days ago · 1 km deep · 0 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc84693. Read Wed, Sep 30, 2026, 5:36 PM UTC.