California earthquakes

M2.6 earthquake 20 km WSW of Williams, California

A magnitude 2.6 earthquake struck 20 km WSW of Williams, California on Mon, Sep 2, 1985, 12:15 AM PDT (07:15 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.6 7 km W of Cobb, California. This one was a foreshock.

Williams 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
2.6 (md), micro
Local time
UTC
1985-09-02 07:15:44 UTC
Depth
1.9 km (1.2 mi), shallow
Epicenter
39.117° N, 122.383° 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, 5.5 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
110°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 179 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.98 km W of Cobb, California · 14985 days ago · 1 km deep · 50 km away
  2. 1.812 km NE of Upper Lake, California · 14985 days ago · 2 km deep · 39 km away
  3. 2.13 km W of Glen Ellen, California · 14985 days ago · 8 km deep · 86 km away
  4. 1.93 km WSW of Glen Ellen, California · 14985 days ago · 8 km deep · 86 km away
  5. 2.16 km NE of Windsor, California · 14985 days ago · 5 km deep · 67 km away
  6. 2.2Northern California · 14985 days ago · 2 km deep · 38 km away
  7. 1.66 km W of Cobb, California · 14984 days ago · 0 km deep · 48 km away
  8. 2.512 km NE of Upper Lake, California · 14984 days ago · 3 km deep · 38 km away
  9. 1.64 km W of Cobb, California · 14984 days ago · 0 km deep · 47 km away
  10. 1.68 km W of Cobb, California · 14984 days ago · 1 km deep · 50 km away
  11. 2.44 km E of Williams, California · 14984 days ago · 16 km deep · 25 km away
  12. 1.65 km W of Cobb, California · 14984 days ago · 1 km deep · 48 km away
  13. 1.812 km NE of Upper Lake, California · 14984 days ago · 2 km deep · 38 km away
  14. 1.85 km W of Cobb, California · 14983 days ago · 0 km deep · 49 km away
  15. 1.612 km NE of Upper Lake, California · 14983 days ago · 4 km deep · 40 km away
  16. 1.94 km WSW of Cobb, California · 14983 days ago · 1 km deep · 48 km away
  17. 2.36 km W of Cobb, California · 14983 days ago · 3 km deep · 49 km away
  18. 1.86 km W of Cobb, California · 14982 days ago · 3 km deep · 49 km away
  19. 1.66 km WNW of Cobb, California · 14982 days ago · 1 km deep · 47 km away
  20. 1.78 km WNW of Cobb, California · 14982 days ago · -1 km deep · 46 km away
  21. 2.05 km NE of Williams, California · 14982 days ago · 18 km deep · 26 km away
  22. 1.86 km E of Williams, California · 14982 days ago · 4 km deep · 27 km away
  23. 1.66 km W of Cobb, California · 14982 days ago · 3 km deep · 49 km away
  24. 3.67 km W of Cobb, California · 14981 days ago · 10 km deep · 49 km away
  25. 2.15 km SW of Cobb, California · 14981 days ago · -1 km deep · 50 km away
  26. 1.95 km SW of Cobb, California · 14981 days ago · 0 km deep · 50 km away
  27. 1.76 km W of Cobb, California · 14981 days ago · 2 km deep · 49 km away
  28. 1.95 km SW of Cobb, California · 14981 days ago · 0 km deep · 50 km away
  29. 1.910 km NNW of Moskowite Corner, California · 14981 days ago · 9 km deep · 66 km away
  30. 1.86 km WSW of Cobb, California · 14981 days ago · 4 km deep · 50 km away
  31. 2.110 km E of Comptche, California · 14981 days ago · 8 km deep · 95 km away
  32. 1.65 km SW of Cobb, California · 14981 days ago · 0 km deep · 50 km away
  33. 2.55 km SW of Cobb, California · 14980 days ago · 1 km deep · 50 km away
  34. 2.55 km ENE of Williams, California · 14980 days ago · 10 km deep · 25 km away
  35. 2.09 km WNW of Arbuckle, California · 14980 days ago · 5 km deep · 21 km away
  36. 2.07 km ESE of Williams, California · 14980 days ago · 8 km deep · 27 km away
  37. 2.36 km ENE of Williams, California · 14980 days ago · 16 km deep · 27 km away
  38. 1.66 km SW of Cobb, California · 14979 days ago · 0 km deep · 50 km away
  39. 1.85 km E of Clearlake Oaks, California · 14979 days ago · -1 km deep · 22 km away
  40. 2.14 km SW of Cobb, California · 14978 days ago · -1 km deep · 48 km away
  41. 1.610 km NW of Cobb, California · 14978 days ago · 1 km deep · 46 km away
  42. 2.013 km SW of Durham, California · 14978 days ago · 18 km deep · 64 km away
  43. 1.86 km WSW of Cobb, California · 14978 days ago · 1 km deep · 50 km away
  44. 1.97 km W of Cobb, California · 14978 days ago · 0 km deep · 51 km away
  45. 2.16 km W of Cobb, California · 14977 days ago · 1 km deep · 48 km away
  46. 1.86 km SW of Hopland, California · 14977 days ago · 4 km deep · 72 km away
  47. 2.27 km W of Cobb, California · 14977 days ago · 3 km deep · 49 km away
  48. 2.127 km ESE of Covelo, California · 14977 days ago · 4 km deep · 81 km away
  49. 1.95 km SW of Cobb, California · 14976 days ago · 2 km deep · 50 km away
  50. 2.46 km W of Cobb, California · 14976 days ago · 1 km deep · 48 km away
  51. 1.99 km W of Cobb, California · 14975 days ago · 0 km deep · 51 km away
  52. 1.57 km WSW of Cobb, California · 14975 days ago · 0 km deep · 51 km away
  53. 1.63 km SW of Cobb, California · 14975 days ago · 1 km deep · 48 km away
  54. 1.57 km W of Cobb, California · 14974 days ago · 1 km deep · 49 km away
  55. 1.65 km WSW of Cobb, California · 14974 days ago · 1 km deep · 49 km away
  56. 1.85 km NNE of Windsor, California · 14974 days ago · 5 km deep · 68 km away
  57. 2.36 km NNE of Windsor, California · 14974 days ago · 1 km deep · 67 km away
  58. 2.510 km N of Cloverdale, California · 14974 days ago · -1 km deep · 59 km away
  59. 3.15 km WSW of Cobb, California · 14973 days ago · -1 km deep · 49 km away
  60. 1.95 km WSW of Cobb, California · 14973 days ago · 0 km deep · 49 km away

The first 60 of 179.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc54316. Read Tue, Sep 22, 2026, 5:23 PM UTC.