California earthquakes

M1.8 earthquake 6 km W of Cobb, California

A magnitude 1.8 earthquake struck 6 km W of Cobb, California on Sun, May 12, 1985, 2:38 PM PDT (21:38 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.2 10 km ESE of Williams, 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
1.8 (md), micro
Local time
UTC
1985-05-12 21:38:43 UTC
Depth
3.0 km (1.9 mi), shallow
Epicenter
38.820° N, 122.799° 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, 0.4 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
50°
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: 183 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.210 km ESE of Williams, California · 15099 days ago · 14 km deep · 73 km away
  2. 1.57 km E of Williams, California · 15099 days ago · 3 km deep · 74 km away
  3. 1.84 km W of Cobb, California · 15099 days ago · 0 km deep · 2 km away
  4. 1.95 km W of Cobb, California · 15099 days ago · 1 km deep · 1 km away
  5. 2.37 km W of Cobb, California · 15099 days ago · 0 km deep · 1 km away
  6. 1.99 km W of Cobb, California · 15099 days ago · 0 km deep · 3 km away
  7. 1.67 km W of Cobb, California · 15097 days ago · 3 km deep · 1 km away
  8. 3.07 km WSW of Cobb, California · 15097 days ago · 4 km deep · 3 km away
  9. 2.06 km W of Cobb, California · 15096 days ago · 3 km deep · 1 km away
  10. 2.16 km W of Cobb, California · 15096 days ago · 4 km deep · 1 km away
  11. 1.66 km W of Cobb, California · 15096 days ago · 3 km deep · 0 km away
  12. 1.88 km WSW of Cobb, California · 15096 days ago · 1 km deep · 3 km away
  13. 2.614 km N of Upper Lake, California · 15096 days ago · 9 km deep · 54 km away
  14. 1.913 km N of Upper Lake, California · 15096 days ago · 8 km deep · 53 km away
  15. 2.47 km SW of Colusa, California · 15095 days ago · 25 km deep · 74 km away
  16. 2.38 km SSW of Colusa, California · 15095 days ago · 28 km deep · 75 km away
  17. 2.316 km NNE of Angwin, California · 15095 days ago · -1 km deep · 37 km away
  18. 2.26 km W of Cobb, California · 15094 days ago · 3 km deep · 0 km away
  19. 2.16 km W of Cobb, California · 15094 days ago · 3 km deep · 0 km away
  20. 3.012 km ESE of Hidden Valley Lake, California · 15094 days ago · 8 km deep · 33 km away
  21. 2.55 km SW of Cobb, California · 15094 days ago · 2 km deep · 4 km away
  22. 1.713 km SE of Hidden Valley Lake, California · 15094 days ago · 3 km deep · 34 km away
  23. 1.65 km SW of Cobb, California · 15094 days ago · 1 km deep · 5 km away
  24. 2.25 km SW of Cobb, California · 15094 days ago · 0 km deep · 5 km away
  25. 1.85 km SW of Cobb, California · 15094 days ago · 0 km deep · 5 km away
  26. 1.53 km NNE of Santa Rosa, California · 15094 days ago · 3 km deep · 40 km away
  27. 2.46 km W of Cobb, California · 15094 days ago · 3 km deep · 1 km away
  28. 1.57 km WSW of Cobb, California · 15094 days ago · 2 km deep · 1 km away
  29. 1.57 km W of Cobb, California · 15094 days ago · 3 km deep · 0 km away
  30. 2.64 km W of Meridian, California · 15093 days ago · 6 km deep · 80 km away
  31. 2.08 km N of Cloverdale, California · 15092 days ago · 3 km deep · 20 km away
  32. 2.23 km SW of Cobb, California · 15092 days ago · 2 km deep · 5 km away
  33. 2.67 km WSW of Cobb, California · 15092 days ago · 0 km deep · 2 km away
  34. 2.08 km WSW of Cobb, California · 15092 days ago · 0 km deep · 2 km away
  35. 1.612 km ENE of Upper Lake, California · 15091 days ago · 9 km deep · 45 km away
  36. 1.71 km NNE of Talmage, California · 15091 days ago · 4 km deep · 48 km away
  37. 1.85 km W of Cobb, California · 15090 days ago · 1 km deep · 1 km away
  38. 2.17 km W of Cobb, California · 15090 days ago · 3 km deep · 1 km away
  39. 2.19 km WSW of Meridian, California · 15090 days ago · 5 km deep · 75 km away
  40. 2.510 km ESE of Williams, California · 15090 days ago · 18 km deep · 73 km away
  41. 2.6Northern California · 15089 days ago · 1 km deep · 2 km away
  42. 2.16 km E of Williams, California · 15089 days ago · 22 km deep · 73 km away
  43. 2.810 km NNE of Arbuckle, California · 15089 days ago · 9 km deep · 74 km away
  44. 3.69 km ESE of Williams, California · 15089 days ago · 13 km deep · 73 km away
  45. 2.39 km SSW of Colusa, California · 15089 days ago · 16 km deep · 74 km away
  46. 1.86 km SSW of Colusa, California · 15089 days ago · 5 km deep · 76 km away
  47. 3.5Northern California · 15089 days ago · 23 km deep · 75 km away
  48. 1.84 km SSW of Dunnigan, California · 15089 days ago · 5 km deep · 70 km away
  49. 2.28 km NNE of Arbuckle, California · 15089 days ago · 4 km deep · 74 km away
  50. 1.96 km W of Meridian, California · 15089 days ago · 5 km deep · 79 km away
  51. 1.67 km SSW of Colusa, California · 15088 days ago · 5 km deep · 75 km away
  52. 1.88 km W of Cobb, California · 15088 days ago · 1 km deep · 2 km away
  53. 2.48 km W of Cobb, California · 15088 days ago · 1 km deep · 2 km away
  54. 2.610 km WSW of Cobb, California · 15088 days ago · 2 km deep · 4 km away
  55. 1.77 km NE of Clearlake, California · 15088 days ago · 1 km deep · 29 km away
  56. 1.87 km W of Cobb, California · 15087 days ago · 0 km deep · 1 km away
  57. 1.65 km W of Lower Lake, California · 15087 days ago · 4 km deep · 14 km away
  58. 1.86 km W of Lower Lake, California · 15087 days ago · 4 km deep · 14 km away
  59. 1.65km WNW of Lakeport, CA · 15087 days ago · 24 km deep · 30 km away
  60. 1.78 km W of Cobb, California · 15086 days ago · 0 km deep · 2 km away

The first 60 of 183.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc47676. Read Tue, Sep 22, 2026, 5:22 PM UTC.