California earthquakes

M1.6 earthquake 17 km W of Williams, California

A magnitude 1.6 earthquake struck 17 km W of Williams, California on Mon, Apr 1, 1985, 9:17 AM PST (17:17 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.6 7 km WSW 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
1.6 (md), micro
Local time
UTC
1985-04-01 17:17:47 UTC
Depth
2.9 km (1.8 mi), shallow
Epicenter
39.136° N, 122.356° 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 1.9 km horizontally, 6.9 km in depth
Depth from
From location
Station coverage gap
241°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 181 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.67 km WSW of Cobb, California · 15138 days ago · 1 km deep · 54 km away
  2. 2.57 km WSW of Cobb, California · 15138 days ago · 1 km deep · 54 km away
  3. 3.45 km SW of Cobb, California · 15137 days ago · 1 km deep · 53 km away
  4. 2.55 km SW of Cobb, California · 15137 days ago · 1 km deep · 52 km away
  5. 1.61 km S of Cotati, California · 15137 days ago · 17 km deep · 96 km away
  6. 1.67 km WSW of Cobb, California · 15137 days ago · 3 km deep · 54 km away
  7. 1.75 km W of Cobb, California · 15136 days ago · 4 km deep · 51 km away
  8. 2.23 km SW of Cobb, California · 15136 days ago · 1 km deep · 51 km away
  9. 2.0Northern California · 15136 days ago · 1 km deep · 53 km away
  10. 2.08 km WSW of Cobb, California · 15136 days ago · 3 km deep · 54 km away
  11. 2.58 km WNW of Guinda, California · 15136 days ago · 2 km deep · 32 km away
  12. 2.47 km WNW of Guinda, California · 15135 days ago · 1 km deep · 32 km away
  13. 2.28 km WSW of Cobb, California · 15135 days ago · 0 km deep · 54 km away
  14. 1.918 km NE of Upper Lake, California · 15135 days ago · 7 km deep · 41 km away
  15. 2.38 km WSW of Cobb, California · 15135 days ago · 3 km deep · 54 km away
  16. 2.0Northern California · 15133 days ago · 1 km deep · 52 km away
  17. 2.17 km NNW of Richvale, California · 15133 days ago · 5 km deep · 68 km away
  18. 2.07 km W of Cobb, California · 15133 days ago · 1 km deep · 52 km away
  19. 2.221 km WSW of Williams, California · 15133 days ago · 0 km deep · 5 km away
  20. 3.710 km WSW of Meridian, California · 15132 days ago · 18 km deep · 28 km away
  21. 2.29 km WSW of Meridian, California · 15132 days ago · 12 km deep · 29 km away
  22. 1.67 km WSW of Cobb, California · 15132 days ago · 0 km deep · 54 km away
  23. 1.611 km W of Cobb, California · 15131 days ago · -1 km deep · 57 km away
  24. 1.77 km W of Cobb, California · 15131 days ago · 0 km deep · 53 km away
  25. 2.57 km W of Cobb, California · 15131 days ago · 1 km deep · 53 km away
  26. 2.57 km W of Cobb, California · 15131 days ago · 1 km deep · 52 km away
  27. 1.67 km W of Cobb, California · 15131 days ago · 1 km deep · 52 km away
  28. 2.57 km W of Cobb, California · 15131 days ago · 1 km deep · 53 km away
  29. 2.014 km N of Upper Lake, California · 15131 days ago · 5 km deep · 52 km away
  30. 2.88 km NNE of Arbuckle, California · 15131 days ago · 3 km deep · 30 km away
  31. 1.710 km ESE of Covelo, California · 15130 days ago · 1 km deep · 96 km away
  32. 2.322 km WSW of Williams, California · 15130 days ago · 3 km deep · 6 km away
  33. 1.57 km W of Cobb, California · 15130 days ago · 1 km deep · 52 km away
  34. 1.66 km W of Cobb, California · 15129 days ago · 3 km deep · 52 km away
  35. 1.68 km WSW of Cobb, California · 15129 days ago · 3 km deep · 54 km away
  36. 2.58 km WSW of Meridian, California · 15129 days ago · 12 km deep · 30 km away
  37. 1.64 km SW of Hopland, California · 15129 days ago · 5 km deep · 72 km away
  38. 2.37 km WSW of Cobb, California · 15128 days ago · 4 km deep · 54 km away
  39. 1.66 km W of Cobb, California · 15128 days ago · 1 km deep · 52 km away
  40. 1.78 km WSW of Cobb, California · 15127 days ago · 3 km deep · 54 km away
  41. 1.85 km NNW of Geyserville, California · 15127 days ago · 5 km deep · 66 km away
  42. 1.97 km WSW of Cobb, California · 15125 days ago · 2 km deep · 54 km away
  43. 1.97 km WSW of Cobb, California · 15124 days ago · 1 km deep · 53 km away
  44. 2.16 km W of Cobb, California · 15124 days ago · 3 km deep · 52 km away
  45. 2.06 km W of Cobb, California · 15124 days ago · 3 km deep · 52 km away
  46. 2.28 km WSW of Cobb, California · 15123 days ago · 3 km deep · 55 km away
  47. 1.76 km NE of Brooktrails, California · 15123 days ago · 6 km deep · 92 km away
  48. 1.7Northern California · 15122 days ago · 2 km deep · 53 km away
  49. 2.1Northern California · 15122 days ago · 2 km deep · 74 km away
  50. 2.74 km W of Cobb, California · 15122 days ago · 0 km deep · 50 km away
  51. 1.66 km W of Cobb, California · 15122 days ago · -1 km deep · 51 km away
  52. 1.66 km W of Cobb, California · 15122 days ago · -1 km deep · 51 km away
  53. 1.69 km W of Cobb, California · 15122 days ago · 1 km deep · 55 km away
  54. 1.59 km W of Cobb, California · 15122 days ago · 1 km deep · 55 km away
  55. 1.77 km WSW of Cobb, California · 15121 days ago · 1 km deep · 54 km away
  56. 2.45 km SW of Cobb, California · 15121 days ago · 0 km deep · 53 km away
  57. 2.06 km WNW of Guinda, California · 15121 days ago · 3 km deep · 33 km away
  58. 1.85 km SW of Cobb, California · 15121 days ago · 2 km deep · 53 km away
  59. 1.77 km WSW of Cobb, California · 15121 days ago · 1 km deep · 53 km away
  60. 2.55 km WSW of Cobb, California · 15120 days ago · 3 km deep · 53 km away

The first 60 of 181.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc45137. Read Tue, Sep 22, 2026, 9:18 PM UTC.