California earthquakes

M2.0 earthquake 7 km W of Cobb, California

A magnitude 2.0 earthquake struck 7 km W of Cobb, California on Wed, Aug 27, 1986, 6:23 PM PDT (01:23 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M4.5 26 km NE of Potter Valley, 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
2.0 (md), micro
Local time
UTC
1986-08-28 01:23:55 UTC
Depth
1.0 km (0.6 mi), shallow
Epicenter
38.812° N, 122.809° 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 0.4 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
112°
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: 163 in the 60 days after this one and 92 in the 30 days before it.

After

  1. 1.67 km W of Cobb, California · 14644 days ago · 3 km deep · 1 km away
  2. 1.64 km W of Cobb, California · 14644 days ago · 1 km deep · 3 km away
  3. 2.05 km WSW of Cobb, California · 14643 days ago · -1 km deep · 2 km away
  4. 1.64 km SW of Cobb, California · 14643 days ago · -1 km deep · 5 km away
  5. 1.76 km SW of Cobb, California · 14643 days ago · 0 km deep · 4 km away
  6. 1.96 km W of Cobb, California · 14643 days ago · 1 km deep · 2 km away
  7. 1.84 km SW of Glen Ellen, California · 14642 days ago · 5 km deep · 57 km away
  8. 1.97 km NNW of Redwood Valley, California · 14642 days ago · 2 km deep · 68 km away
  9. 2.12 km NNW of Larkfield-Wikiup, California · 14642 days ago · 8 km deep · 31 km away
  10. 1.79 km NNE of Larkfield-Wikiup, California · 14642 days ago · 4 km deep · 26 km away
  11. 2.08 km ESE of Hopland, California · 14642 days ago · 3 km deep · 24 km away
  12. 1.88 km W of Cobb, California · 14642 days ago · 2 km deep · 1 km away
  13. 1.710 km W of Cobb, California · 14642 days ago · -1 km deep · 3 km away
  14. 2.05 km WSW of Cobb, California · 14642 days ago · 0 km deep · 3 km away
  15. 1.75 km WSW of Cobb, California · 14642 days ago · 0 km deep · 3 km away
  16. 1.66 km WSW of Cobb, California · 14641 days ago · 1 km deep · 1 km away
  17. 2.56 km W of Cobb, California · 14641 days ago · 3 km deep · 1 km away
  18. 1.96 km WSW of Cobb, California · 14640 days ago · 0 km deep · 2 km away
  19. 1.55 km SW of Cobb, California · 14640 days ago · 0 km deep · 4 km away
  20. 2.115 km NNE of Angwin, California · 14639 days ago · 4 km deep · 38 km away
  21. 2.63 km WNW of Cobb, California · 14638 days ago · 0 km deep · 5 km away
  22. 2.13 km WNW of Cobb, California · 14638 days ago · 0 km deep · 5 km away
  23. 2.73 km WNW of Cobb, California · 14638 days ago · 0 km deep · 5 km away
  24. 1.75 km SW of Cobb, California · 14638 days ago · 0 km deep · 5 km away
  25. 1.86 km W of Cobb, California · 14638 days ago · 3 km deep · 1 km away
  26. 3.122 km W of Elk Creek, California · 14638 days ago · 30 km deep · 85 km away
  27. 2.35 km WSW of Cobb, California · 14638 days ago · -1 km deep · 3 km away
  28. 1.96 km WSW of Cobb, California · 14638 days ago · 0 km deep · 3 km away
  29. 1.66 km ENE of Larkfield-Wikiup, California · 14638 days ago · 4 km deep · 33 km away
  30. 1.55 km WSW of Cobb, California · 14637 days ago · 1 km deep · 3 km away
  31. 2.85 km SW of Cobb, California · 14637 days ago · 0 km deep · 5 km away
  32. 2.32 km WNW of Cobb, California · 14637 days ago · -1 km deep · 6 km away
  33. 1.75 km SW of Cobb, California · 14637 days ago · 2 km deep · 3 km away
  34. 1.913 km SE of Hidden Valley Lake, California · 14637 days ago · 5 km deep · 34 km away
  35. 1.66 km W of Cobb, California · 14637 days ago · 3 km deep · 2 km away
  36. 2.55 km SW of Cobb, California · 14636 days ago · 0 km deep · 5 km away
  37. 1.74 km W of Cobb, California · 14636 days ago · 1 km deep · 3 km away
  38. 2.37 km W of Cobb, California · 14635 days ago · 0 km deep · 1 km away
  39. 2.94 km S of Cobb, California · 14635 days ago · 1 km deep · 8 km away
  40. 1.83 km S of Cobb, California · 14635 days ago · 1 km deep · 8 km away
  41. 3.46 km W of Cobb, California · 14635 days ago · 1 km deep · 2 km away
  42. 3.46 km W of Cobb, California · 14635 days ago · -1 km deep · 2 km away
  43. 1.76 km W of Cobb, California · 14635 days ago · 3 km deep · 1 km away
  44. 1.52 km NW of Larkfield-Wikiup, California · 14634 days ago · 3 km deep · 31 km away
  45. 1.84 km W of Cobb, California · 14634 days ago · 0 km deep · 3 km away
  46. 1.95 km SW of Cobb, California · 14633 days ago · 2 km deep · 3 km away
  47. 1.922 km NNE of Upper Lake, California · 14633 days ago · 13 km deep · 60 km away
  48. 2.03 km WNW of Cobb, California · 14632 days ago · 0 km deep · 4 km away
  49. 1.710 km E of Calpella, California · 14632 days ago · 2 km deep · 51 km away
  50. 2.03 km W of Forestville, California · 14632 days ago · 0 km deep · 39 km away
  51. 1.75 km WNW of Cobb, California · 14631 days ago · 1 km deep · 3 km away
  52. 1.64 km W of Brooktrails, California · 14631 days ago · 4 km deep · 90 km away
  53. 1.97 km WSW of Cobb, California · 14630 days ago · 2 km deep · 1 km away
  54. 2.018 km NE of Upper Lake, California · 14630 days ago · 4 km deep · 54 km away
  55. 4.526 km NE of Potter Valley, California · 14629 days ago · 4 km deep · 73 km away
  56. 1.611 km WSW of Cloverdale, California · 14629 days ago · 4 km deep · 28 km away
  57. 2.26 km W of Cobb, California · 14629 days ago · 1 km deep · 2 km away
  58. 2.04 km WSW of Cobb, California · 14629 days ago · 1 km deep · 3 km away
  59. 2.22 km NNW of Talmage, California · 14628 days ago · -1 km deep · 50 km away
  60. 2.05 km WNW of Cobb, California · 14628 days ago · 2 km deep · 4 km away

The first 60 of 163.

Before

  1. 2.5Northern California · 14644 days ago · 12 km deep · 75 km away
  2. 1.64 km W of Cobb, California · 14644 days ago · 1 km deep · 3 km away
  3. 1.70 km WNW of Redwood Valley, California · 14645 days ago · 6 km deep · 62 km away
  4. 1.97 km NNE of Madison, California · 14645 days ago · 9 km deep · 75 km away
  5. 2.412 km NNE of Moskowite Corner, California · 14645 days ago · 14 km deep · 67 km away
  6. 1.75 km W of Middletown, California · 14645 days ago · 7 km deep · 12 km away
  7. 3.66 km E of Talmage, California · 14645 days ago · 4 km deep · 43 km away
  8. 2.26 km SW of Cobb, California · 14645 days ago · 1 km deep · 5 km away
  9. 2.05 km W of Cobb, California · 14645 days ago · 0 km deep · 2 km away
  10. 1.76 km W of Cobb, California · 14645 days ago · 1 km deep · 2 km away
  11. 2.88 km ESE of Point Arena, California · 14645 days ago · -1 km deep · 70 km away
  12. 1.84 km SW of Cobb, California · 14646 days ago · 0 km deep · 4 km away
  13. 2.17 km W of Cobb, California · 14646 days ago · 1 km deep · 1 km away
  14. 2.57 km W of Cobb, California · 14646 days ago · 0 km deep · 1 km away
  15. 1.87 km W of Cobb, California · 14646 days ago · 1 km deep · 1 km away
  16. 1.76 km W of Cobb, California · 14647 days ago · 3 km deep · 1 km away
  17. 2.03 km W of Cobb, California · 14647 days ago · 0 km deep · 4 km away
  18. 1.64 km W of Cobb, California · 14647 days ago · 2 km deep · 4 km away
  19. 2.33 km WNW of Cobb, California · 14647 days ago · 0 km deep · 4 km away
  20. 1.85 km W of Cobb, California · 14647 days ago · 0 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1142949. Read Wed, Sep 30, 2026, 6:29 PM UTC.