California earthquakes

M1.9 earthquake 6 km WSW of Cobb, California

A magnitude 1.9 earthquake struck 6 km WSW of Cobb, California on Thu, Jun 27, 1985, 6:38 AM PDT (13:38 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.3 12 km WSW of Kelseyville, 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
1.9 (md), micro
Local time
UTC
1985-06-27 13:38:50 UTC
Depth
3.5 km (2.1 mi), shallow
Epicenter
38.806° N, 122.795° 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
±0.10
Depth from
From location
Station coverage gap
37°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 170 in the 60 days after this one and 119 in the 30 days before it.

After

  1. 2.04 km WSW of Cobb, California · 15067 days ago · 1 km deep · 2 km away
  2. 2.58 km SSW of Colusa, California · 15066 days ago · 5 km deep · 75 km away
  3. 2.06 km W of Cobb, California · 15066 days ago · 3 km deep · 2 km away
  4. 1.66 km W of Cobb, California · 15065 days ago · 3 km deep · 2 km away
  5. 2.14 km SSE of Green Valley, California · 15065 days ago · 9 km deep · 86 km away
  6. 1.86 km W of Cobb, California · 15064 days ago · 0 km deep · 2 km away
  7. 2.06 km W of Cobb, California · 15064 days ago · 2 km deep · 1 km away
  8. 1.96 km W of Cobb, California · 15064 days ago · 2 km deep · 1 km away
  9. 2.47 km WSW of Cobb, California · 15064 days ago · 1 km deep · 1 km away
  10. 1.612 km E of Cloverdale, California · 15063 days ago · 5 km deep · 7 km away
  11. 1.84 km WSW of Cobb, California · 15063 days ago · 1 km deep · 2 km away
  12. 1.66 km W of Cobb, California · 15062 days ago · 3 km deep · 1 km away
  13. 4.312 km WSW of Kelseyville, California · 15062 days ago · 4 km deep · 21 km away
  14. 1.77 km WSW of Cobb, California · 15062 days ago · 2 km deep · 1 km away
  15. 2.17 km SSW of Colusa, California · 15061 days ago · 13 km deep · 75 km away
  16. 1.76 km NE of Williams, California · 15061 days ago · 12 km deep · 74 km away
  17. 1.95 km SSE of Clear Lake Riviera, California · 15061 days ago · 1 km deep · 15 km away
  18. 2.37 km SW of Colusa, California · 15060 days ago · 15 km deep · 75 km away
  19. 2.37 km W of Cobb, California · 15060 days ago · 1 km deep · 2 km away
  20. 3.07 km W of Cobb, California · 15060 days ago · 3 km deep · 2 km away
  21. 1.94 km W of Cobb, California · 15059 days ago · 2 km deep · 3 km away
  22. 2.37 km WSW of Cobb, California · 15059 days ago · 3 km deep · 1 km away
  23. 2.28 km ESE of Willows, California · 15059 days ago · 14 km deep · 97 km away
  24. 1.57 km W of Cobb, California · 15058 days ago · 3 km deep · 2 km away
  25. 2.023 km SE of Covelo, California · 15058 days ago · 4 km deep · 95 km away
  26. 1.88 km WSW of Cobb, California · 15057 days ago · 2 km deep · 2 km away
  27. 2.07 km W of Cobb, California · 15057 days ago · 2 km deep · 2 km away
  28. 1.85 km WSW of Cobb, California · 15057 days ago · 0 km deep · 1 km away
  29. 1.98 km WSW of Meridian, California · 15056 days ago · 4 km deep · 76 km away
  30. 1.74 km W of Cobb, California · 15056 days ago · 0 km deep · 3 km away
  31. 1.76 km W of Cobb, California · 15055 days ago · 1 km deep · 3 km away
  32. 1.84 km WSW of Cobb, California · 15055 days ago · 1 km deep · 2 km away
  33. 2.36 km WSW of Eldridge, California · 15054 days ago · 7 km deep · 57 km away
  34. 1.728 km NE of Potter Valley, California · 15054 days ago · 8 km deep · 78 km away
  35. 2.56 km WSW of Eldridge, California · 15054 days ago · 7 km deep · 57 km away
  36. 2.57 km SSE of Suisun, California · 15053 days ago · 0 km deep · 98 km away
  37. 1.75 km SW of Cobb, California · 15053 days ago · 0 km deep · 4 km away
  38. 1.73 km SW of Cobb, California · 15053 days ago · 1 km deep · 4 km away
  39. 2.16 km WSW of Eldridge, California · 15053 days ago · 6 km deep · 57 km away
  40. 2.36 km ESE of Suisun, California · 15053 days ago · 5 km deep · 97 km away
  41. 1.7Northern California · 15052 days ago · 6 km deep · 57 km away
  42. 3.37 km W of Cobb, California · 15052 days ago · 0 km deep · 2 km away
  43. 1.77 km W of Cobb, California · 15052 days ago · 1 km deep · 3 km away
  44. 1.59 km W of Cobb, California · 15052 days ago · -1 km deep · 3 km away
  45. 1.87 km W of Cobb, California · 15052 days ago · 1 km deep · 3 km away
  46. 1.88 km W of Cobb, California · 15052 days ago · 1 km deep · 3 km away
  47. 1.65 km SSE of Cobb, California · 15052 days ago · 16 km deep · 9 km away
  48. 2.27 km SSW of Colusa, California · 15051 days ago · 15 km deep · 75 km away
  49. 1.58 km WSW of Cobb, California · 15051 days ago · 3 km deep · 2 km away
  50. 1.66 km WSW of Cobb, California · 15051 days ago · 3 km deep · 0 km away
  51. 1.810 km S of Kelseyville, California · 15050 days ago · 4 km deep · 10 km away
  52. 2.024 km NNE of Potter Valley, California · 15050 days ago · 4 km deep · 83 km away
  53. 2.110 km S of Kelseyville, California · 15049 days ago · 4 km deep · 10 km away
  54. 2.34 km WSW of Cobb, California · 15049 days ago · 1 km deep · 2 km away
  55. 1.67 km WSW of Cobb, California · 15049 days ago · 1 km deep · 1 km away
  56. 1.86 km W of Cobb, California · 15049 days ago · 3 km deep · 2 km away
  57. 2.26 km W of Cobb, California · 15049 days ago · 3 km deep · 2 km away
  58. 1.96 km WSW of Cobb, California · 15048 days ago · 3 km deep · 0 km away
  59. 2.57 km W of Cobb, California · 15048 days ago · 3 km deep · 1 km away
  60. 1.76 km W of Cobb, California · 15048 days ago · 3 km deep · 1 km away

The first 60 of 170.

Before

  1. 1.66 km E of Calpella, California · 15068 days ago · 4 km deep · 56 km away
  2. 2.25 km E of Calpella, California · 15068 days ago · 7 km deep · 56 km away
  3. 2.310 km NNW of Stonyford, California · 15069 days ago · 4 km deep · 76 km away
  4. 1.87 km W of Cobb, California · 15069 days ago · 3 km deep · 2 km away
  5. 2.210 km NNW of Stonyford, California · 15070 days ago · 7 km deep · 76 km away
  6. 1.75 km SSW of Cobb, California · 15070 days ago · -1 km deep · 4 km away
  7. 1.76 km SSW of Calistoga, California · 15071 days ago · 5 km deep · 36 km away
  8. 1.94 km SW of Cobb, California · 15072 days ago · 0 km deep · 3 km away
  9. 2.18 km WSW of Cobb, California · 15072 days ago · 4 km deep · 2 km away
  10. 1.72 km W of Santa Rosa, California · 15072 days ago · 6 km deep · 40 km away
  11. 1.610 km NNW of Sutter, California · 15072 days ago · 4 km deep · 97 km away
  12. 2.06 km SW of Cobb, California · 15072 days ago · 1 km deep · 3 km away
  13. 2.47 km W of Cobb, California · 15073 days ago · 3 km deep · 2 km away
  14. 2.67 km W of Cobb, California · 15073 days ago · 3 km deep · 2 km away
  15. 2.05 km NNE of Williams, California · 15073 days ago · 16 km deep · 73 km away
  16. 1.64 km W of Cobb, California · 15073 days ago · 1 km deep · 2 km away
  17. 1.97 km W of Cobb, California · 15073 days ago · 3 km deep · 2 km away
  18. 2.617 km N of Upper Lake, California · 15074 days ago · 11 km deep · 58 km away
  19. 1.97 km W of Cobb, California · 15074 days ago · 1 km deep · 2 km away
  20. 1.53 km ENE of Williams, California · 15074 days ago · 14 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc50256. Read Mon, Sep 28, 2026, 8:03 PM UTC.