California earthquakes

M1.9 earthquake 9 km NW of Cobb, California

A magnitude 1.9 earthquake struck 9 km NW of Cobb, California on Mon, Sep 9, 1985, 11:47 PM PDT (06:47 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.6 7 km W of Cobb, 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
1985-09-10 06:47:43 UTC
Depth
0.7 km (0.5 mi), shallow
Epicenter
38.871° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
59°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 117 in the 30 days before it.

After

  1. 1.63 km SW of Cobb, California · 14994 days ago · 0 km deep · 10 km away
  2. 2.010 km NW of Cobb, California · 14994 days ago · 0 km deep · 1 km away
  3. 2.06 km W of Cobb, California · 14994 days ago · 1 km deep · 7 km away
  4. 1.920 km NE of Upper Lake, California · 14994 days ago · -1 km deep · 49 km away
  5. 1.58 km WSW of Cobb, California · 14993 days ago · 0 km deep · 8 km away
  6. 1.96 km W of Cobb, California · 14993 days ago · 4 km deep · 6 km away
  7. 1.98 km W of Cobb, California · 14992 days ago · 1 km deep · 5 km away
  8. 1.812 km NE of Upper Lake, California · 14992 days ago · 2 km deep · 41 km away
  9. 2.13 km W of Glen Ellen, California · 14992 days ago · 8 km deep · 61 km away
  10. 1.93 km WSW of Glen Ellen, California · 14992 days ago · 8 km deep · 61 km away
  11. 2.16 km NE of Windsor, California · 14992 days ago · 5 km deep · 32 km away
  12. 2.2Northern California · 14992 days ago · 2 km deep · 40 km away
  13. 1.66 km W of Cobb, California · 14991 days ago · 0 km deep · 5 km away
  14. 2.512 km NE of Upper Lake, California · 14991 days ago · 3 km deep · 41 km away
  15. 1.64 km W of Cobb, California · 14991 days ago · 0 km deep · 6 km away
  16. 1.68 km W of Cobb, California · 14991 days ago · 1 km deep · 6 km away
  17. 2.44 km E of Williams, California · 14991 days ago · 16 km deep · 69 km away
  18. 1.65 km W of Cobb, California · 14991 days ago · 1 km deep · 6 km away
  19. 1.812 km NE of Upper Lake, California · 14990 days ago · 2 km deep · 40 km away
  20. 1.85 km W of Cobb, California · 14990 days ago · 0 km deep · 7 km away
  21. 1.612 km NE of Upper Lake, California · 14990 days ago · 4 km deep · 42 km away
  22. 1.94 km WSW of Cobb, California · 14990 days ago · 1 km deep · 8 km away
  23. 2.36 km W of Cobb, California · 14990 days ago · 3 km deep · 5 km away
  24. 1.86 km W of Cobb, California · 14989 days ago · 3 km deep · 6 km away
  25. 1.66 km WNW of Cobb, California · 14989 days ago · 1 km deep · 5 km away
  26. 1.78 km WNW of Cobb, California · 14989 days ago · -1 km deep · 1 km away
  27. 2.05 km NE of Williams, California · 14989 days ago · 18 km deep · 70 km away
  28. 1.86 km E of Williams, California · 14989 days ago · 4 km deep · 71 km away
  29. 1.66 km W of Cobb, California · 14988 days ago · 3 km deep · 6 km away
  30. 3.67 km W of Cobb, California · 14988 days ago · 10 km deep · 5 km away
  31. 2.15 km SW of Cobb, California · 14988 days ago · -1 km deep · 10 km away
  32. 1.95 km SW of Cobb, California · 14988 days ago · 0 km deep · 10 km away
  33. 1.76 km W of Cobb, California · 14988 days ago · 2 km deep · 6 km away
  34. 1.95 km SW of Cobb, California · 14988 days ago · 0 km deep · 10 km away
  35. 1.910 km NNW of Moskowite Corner, California · 14988 days ago · 9 km deep · 63 km away
  36. 1.86 km WSW of Cobb, California · 14988 days ago · 4 km deep · 7 km away
  37. 2.110 km E of Comptche, California · 14988 days ago · 8 km deep · 71 km away
  38. 1.65 km SW of Cobb, California · 14987 days ago · 0 km deep · 10 km away
  39. 2.55 km SW of Cobb, California · 14987 days ago · 1 km deep · 10 km away
  40. 2.55 km ENE of Williams, California · 14986 days ago · 10 km deep · 70 km away
  41. 2.09 km WNW of Arbuckle, California · 14986 days ago · 5 km deep · 61 km away
  42. 2.07 km ESE of Williams, California · 14986 days ago · 8 km deep · 70 km away
  43. 2.36 km ENE of Williams, California · 14986 days ago · 16 km deep · 71 km away
  44. 1.66 km SW of Cobb, California · 14986 days ago · 0 km deep · 10 km away
  45. 1.85 km E of Clearlake Oaks, California · 14986 days ago · -1 km deep · 25 km away
  46. 2.14 km SW of Cobb, California · 14985 days ago · -1 km deep · 9 km away
  47. 1.610 km NW of Cobb, California · 14985 days ago · 1 km deep · 1 km away
  48. 1.86 km WSW of Cobb, California · 14984 days ago · 1 km deep · 7 km away
  49. 1.97 km W of Cobb, California · 14984 days ago · 0 km deep · 7 km away
  50. 2.16 km W of Cobb, California · 14984 days ago · 1 km deep · 4 km away
  51. 1.86 km SW of Hopland, California · 14984 days ago · 4 km deep · 33 km away
  52. 2.27 km W of Cobb, California · 14984 days ago · 3 km deep · 6 km away
  53. 2.127 km ESE of Covelo, California · 14984 days ago · 4 km deep · 92 km away
  54. 1.95 km SW of Cobb, California · 14983 days ago · 2 km deep · 10 km away
  55. 2.46 km W of Cobb, California · 14983 days ago · 1 km deep · 5 km away
  56. 1.99 km W of Cobb, California · 14982 days ago · 0 km deep · 6 km away
  57. 1.57 km WSW of Cobb, California · 14982 days ago · 0 km deep · 8 km away
  58. 1.63 km SW of Cobb, California · 14982 days ago · 1 km deep · 10 km away
  59. 1.57 km W of Cobb, California · 14981 days ago · 1 km deep · 5 km away
  60. 1.65 km WSW of Cobb, California · 14981 days ago · 1 km deep · 8 km away

The first 60 of 178.

Before

  1. 1.78 km W of Cobb, California · 14994 days ago · 0 km deep · 7 km away
  2. 1.89 km W of Cobb, California · 14994 days ago · 1 km deep · 7 km away
  3. 1.59 km ESE of Hidden Valley Lake, California · 14994 days ago · 4 km deep · 32 km away
  4. 1.98 km W of Cobb, California · 14995 days ago · 1 km deep · 6 km away
  5. 1.74 km SSW of Cobb, California · 14996 days ago · 2 km deep · 11 km away
  6. 2.012 km NNW of Moskowite Corner, California · 14996 days ago · 0 km deep · 61 km away
  7. 3.49 km NNW of Princeton, California · 14996 days ago · 19 km deep · 94 km away
  8. 1.85 km SW of Cobb, California · 14997 days ago · 0 km deep · 10 km away
  9. 2.74 km WSW of Cobb, California · 14997 days ago · 2 km deep · 8 km away
  10. 1.65 km WSW of Cobb, California · 14997 days ago · 1 km deep · 7 km away
  11. 2.16 km W of Cobb, California · 14997 days ago · 2 km deep · 6 km away
  12. 1.87 km W of Cobb, California · 14997 days ago · 0 km deep · 6 km away
  13. 2.58 km W of Cobb, California · 14997 days ago · 0 km deep · 6 km away
  14. 2.36 km W of Cobb, California · 14997 days ago · 3 km deep · 6 km away
  15. 1.69 km W of Cobb, California · 14997 days ago · 2 km deep · 5 km away
  16. 2.54 km WSW of Cobb, California · 14997 days ago · 2 km deep · 9 km away
  17. 1.64 km N of Cobb, California · 14997 days ago · 2 km deep · 8 km away
  18. 1.77 km WNW of Cobb, California · 14998 days ago · -1 km deep · 4 km away
  19. 1.68 km NW of Moskowite Corner, California · 14998 days ago · 2 km deep · 63 km away
  20. 1.96 km WSW of Cobb, California · 14998 days ago · 3 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc54927. Read Tue, Sep 29, 2026, 1:36 PM UTC.