California earthquakes

M2.3 earthquake 5 km WSW of Cobb, California

A magnitude 2.3 earthquake struck 5 km WSW of Cobb, California on Sun, Apr 20, 1986, 5:22 PM PST (01:22 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M4.1 7 km W of Lodoga, 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
1986-04-21 01:22:27 UTC
Depth
0.3 km (0.2 mi), shallow
Epicenter
38.797° N, 122.776° 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
±0.06
Depth from
From location
Station coverage gap
90°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 155 in the 60 days after this one and 84 in the 30 days before it.

After

  1. 1.85 km WSW of Cobb, California · 14770 days ago · 0 km deep · 0 km away
  2. 2.211 km NE of Healdsburg, California · 14770 days ago · 3 km deep · 13 km away
  3. 1.94 km SSW of Cobb, California · 14769 days ago · 2 km deep · 3 km away
  4. 1.86 km WSW of Cobb, California · 14769 days ago · 2 km deep · 1 km away
  5. 1.78 km WSW of Cobb, California · 14769 days ago · 2 km deep · 3 km away
  6. 1.65 km W of Cobb, California · 14768 days ago · 0 km deep · 3 km away
  7. 1.65 km W of Cobb, California · 14768 days ago · 0 km deep · 3 km away
  8. 1.84 km W of Cobb, California · 14768 days ago · -1 km deep · 2 km away
  9. 1.76 km SW of Cobb, California · 14768 days ago · -1 km deep · 2 km away
  10. 2.24 km WNW of Cobb, California · 14768 days ago · 2 km deep · 4 km away
  11. 1.77 km W of Cobb, California · 14768 days ago · 2 km deep · 3 km away
  12. 1.93 km SW of Cobb, California · 14768 days ago · 1 km deep · 2 km away
  13. 1.82 km NNE of Talmage, California · 14767 days ago · 4 km deep · 52 km away
  14. 1.629 km NE of Potter Valley, California · 14766 days ago · 4 km deep · 82 km away
  15. 1.610 km NE of Talmage, California · 14765 days ago · 3 km deep · 52 km away
  16. 1.78 km WNW of Cloverdale, California · 14765 days ago · 2 km deep · 29 km away
  17. 1.95 km WNW of Cobb, California · 14765 days ago · 2 km deep · 5 km away
  18. 1.65 km WSW of Cobb, California · 14764 days ago · 1 km deep · 1 km away
  19. 1.87 km W of Cobb, California · 14763 days ago · 3 km deep · 4 km away
  20. 1.629 km NE of Potter Valley, California · 14763 days ago · 4 km deep · 83 km away
  21. 1.829 km NE of Potter Valley, California · 14763 days ago · 4 km deep · 83 km away
  22. 1.86 km WSW of Cobb, California · 14762 days ago · 1 km deep · 2 km away
  23. 2.23 km W of Cobb, California · 14762 days ago · 1 km deep · 3 km away
  24. 2.01 km SE of Larkfield-Wikiup, California · 14762 days ago · 4 km deep · 33 km away
  25. 1.97 km W of Cobb, California · 14761 days ago · 3 km deep · 3 km away
  26. 2.18 km WSW of Cobb, California · 14761 days ago · 4 km deep · 3 km away
  27. 2.37 km W of Cobb, California · 14761 days ago · 3 km deep · 4 km away
  28. 1.86 km W of Cobb, California · 14760 days ago · 3 km deep · 4 km away
  29. 2.14 km SW of Oakville, California · 14760 days ago · 11 km deep · 53 km away
  30. 2.02 km SSW of Green Valley, California · 14760 days ago · 6 km deep · 82 km away
  31. 1.66 km WSW of Cobb, California · 14760 days ago · 3 km deep · 2 km away
  32. 1.76 km W of Cobb, California · 14760 days ago · 4 km deep · 3 km away
  33. 1.97 km WSW of Cobb, California · 14759 days ago · 0 km deep · 2 km away
  34. 1.87 km W of Cobb, California · 14759 days ago · 3 km deep · 4 km away
  35. 1.97 km WSW of Cobb, California · 14758 days ago · 2 km deep · 2 km away
  36. 2.06 km SW of Cobb, California · 14758 days ago · 1 km deep · 1 km away
  37. 1.65 km SW of Cobb, California · 14758 days ago · 2 km deep · 0 km away
  38. 1.58 km WSW of Cobb, California · 14758 days ago · 4 km deep · 3 km away
  39. 1.76 km WSW of Cobb, California · 14757 days ago · 9 km deep · 2 km away
  40. 1.713 km SE of Hidden Valley Lake, California · 14757 days ago · -1 km deep · 30 km away
  41. 2.53 km SW of Cobb, California · 14757 days ago · 1 km deep · 2 km away
  42. 1.54 km S of Cobb, California · 14756 days ago · 2 km deep · 5 km away
  43. 1.55 km WSW of Cobb, California · 14756 days ago · 1 km deep · 1 km away
  44. 2.00 km W of Clear Lake Riviera, California · 14756 days ago · 0 km deep · 18 km away
  45. 1.74 km WSW of Cobb, California · 14756 days ago · 1 km deep · 1 km away
  46. 1.66 km W of Cobb, California · 14756 days ago · 3 km deep · 3 km away
  47. 1.75 km WNW of Cobb, California · 14755 days ago · 3 km deep · 4 km away
  48. 1.67 km W of Cobb, California · 14755 days ago · 0 km deep · 3 km away
  49. 3.612 km W of Ukiah, California · 14754 days ago · 26 km deep · 64 km away
  50. 1.67 km W of Cobb, California · 14754 days ago · 3 km deep · 4 km away
  51. 1.67 km SSE of Willits, California · 14753 days ago · 4 km deep · 77 km away
  52. 2.25 km SW of Cobb, California · 14753 days ago · 1 km deep · 2 km away
  53. 2.05 km SW of Cobb, California · 14753 days ago · 0 km deep · 1 km away
  54. 1.85 km SW of Cobb, California · 14752 days ago · 0 km deep · 1 km away
  55. 4.17 km W of Lodoga, California · 14752 days ago · 3 km deep · 59 km away
  56. 1.84 km WSW of Cobb, California · 14752 days ago · 1 km deep · 2 km away
  57. 1.65 km WSW of Cobb, California · 14752 days ago · 1 km deep · 1 km away
  58. 2.15 km W of Cobb, California · 14752 days ago · 0 km deep · 2 km away
  59. 2.14 km NNW of Cobb, California · 14750 days ago · 0 km deep · 7 km away
  60. 1.64 km W of Cobb, California · 14750 days ago · 0 km deep · 2 km away

The first 60 of 155.

Before

  1. 1.67 km WSW of Cobb, California · 14770 days ago · 3 km deep · 3 km away
  2. 1.76 km SW of Cobb, California · 14771 days ago · 0 km deep · 2 km away
  3. 2.58 km WSW of Cobb, California · 14771 days ago · 3 km deep · 3 km away
  4. 1.610 km WNW of Potter Valley, California · 14771 days ago · 7 km deep · 74 km away
  5. 1.66 km W of Cobb, California · 14771 days ago · 3 km deep · 4 km away
  6. 1.87 km W of Cobb, California · 14771 days ago · 3 km deep · 3 km away
  7. 2.46 km W of Cobb, California · 14772 days ago · 4 km deep · 3 km away
  8. 1.710 km NNW of Redwood Valley, California · 14772 days ago · 7 km deep · 73 km away
  9. 2.72 km SW of Green Valley, California · 14773 days ago · 6 km deep · 81 km away
  10. 1.710 km SW of Boonville, California · 14773 days ago · 1 km deep · 62 km away
  11. 1.77 km W of Cobb, California · 14774 days ago · 3 km deep · 3 km away
  12. 1.94 km W of Cobb, California · 14774 days ago · 1 km deep · 2 km away
  13. 1.57 km W of Cobb, California · 14774 days ago · 4 km deep · 4 km away
  14. 2.910 km NW of Philo, California · 14774 days ago · 5 km deep · 75 km away
  15. 1.97 km W of Cobb, California · 14775 days ago · 3 km deep · 4 km away
  16. 1.73 km NNW of Clear Lake Riviera, California · 14777 days ago · -1 km deep · 21 km away
  17. 1.65 km WSW of Cobb, California · 14777 days ago · -1 km deep · 1 km away
  18. 1.66 km WSW of Cobb, California · 14778 days ago · 0 km deep · 1 km away
  19. 1.77 km WSW of Cobb, California · 14778 days ago · 4 km deep · 3 km away
  20. 2.111 km ESE of Willits, California · 14778 days ago · 7 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc70749. Read Sun, Sep 27, 2026, 11:57 PM UTC.