California earthquakes

M1.7 earthquake 4 km W of Cobb, California

A magnitude 1.7 earthquake struck 4 km W of Cobb, California on Tue, Mar 19, 1985, 5:20 AM PST (13:20 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.7 10 km WSW of Meridian, 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
1.7 (md), micro
Local time
UTC
1985-03-19 13:20:33 UTC
Depth
0.1 km (0.0 mi), shallow
Epicenter
38.818° N, 122.778° 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
±0.16
Depth from
From location
Station coverage gap
45°
Stations used
19

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 133 in the 30 days before it.

After

  1. 2.86 km NW of Guinda, California · 15169 days ago · 0 km deep · 47 km away
  2. 2.43 km NNE of Guinda, California · 15169 days ago · -1 km deep · 52 km away
  3. 2.34 km E of Kenwood, California · 15169 days ago · 0 km deep · 52 km away
  4. 1.61 km ENE of Larkfield-Wikiup, California · 15169 days ago · 3 km deep · 33 km away
  5. 1.76 km W of Cobb, California · 15169 days ago · 3 km deep · 2 km away
  6. 1.85 km SW of Cobb, California · 15169 days ago · 1 km deep · 3 km away
  7. 1.97 km W of Cobb, California · 15168 days ago · 1 km deep · 3 km away
  8. 2.05 km WSW of Cobb, California · 15168 days ago · 0 km deep · 2 km away
  9. 2.75 km W of Cobb, California · 15167 days ago · 3 km deep · 1 km away
  10. 2.09 km W of Cobb, California · 15167 days ago · 2 km deep · 5 km away
  11. 1.85 km SW of Cobb, California · 15167 days ago · 4 km deep · 3 km away
  12. 1.65 km W of Cobb, California · 15167 days ago · -1 km deep · 1 km away
  13. 1.87 km WSW of Cobb, California · 15166 days ago · 1 km deep · 3 km away
  14. 1.819 km NNE of Upper Lake, California · 15166 days ago · 0 km deep · 57 km away
  15. 2.27 km WSW of Cobb, California · 15166 days ago · 2 km deep · 3 km away
  16. 3.04 km W of Cobb, California · 15166 days ago · -1 km deep · 1 km away
  17. 1.68 km W of Cobb, California · 15166 days ago · 0 km deep · 3 km away
  18. 2.35 km SW of Cobb, California · 15165 days ago · 1 km deep · 4 km away
  19. 1.912 km NW of Upper Lake, California · 15165 days ago · 5 km deep · 51 km away
  20. 3.27 km NNE of Hopland, California · 15165 days ago · 2 km deep · 36 km away
  21. 1.96 km W of Cobb, California · 15165 days ago · 3 km deep · 2 km away
  22. 2.09 km NNE of Angwin, California · 15165 days ago · -1 km deep · 38 km away
  23. 2.06 km SW of Cobb, California · 15164 days ago · 1 km deep · 4 km away
  24. 1.55 km SSW of Cobb, California · 15164 days ago · 1 km deep · 4 km away
  25. 2.36 km WSW of Cobb, California · 15163 days ago · -1 km deep · 3 km away
  26. 1.86 km WSW of Cobb, California · 15163 days ago · 0 km deep · 3 km away
  27. 1.87 km WSW of Cobb, California · 15163 days ago · 1 km deep · 3 km away
  28. 2.14 km WSW of Cobb, California · 15163 days ago · 2 km deep · 1 km away
  29. 1.65 km SW of Cobb, California · 15163 days ago · 1 km deep · 3 km away
  30. 1.96 km WSW of Cobb, California · 15161 days ago · 4 km deep · 2 km away
  31. 1.66 km W of Cobb, California · 15161 days ago · 3 km deep · 1 km away
  32. 1.817 km ESE of Hidden Valley Lake, California · 15160 days ago · 4 km deep · 36 km away
  33. 2.97 km W of Cobb, California · 15160 days ago · 1 km deep · 3 km away
  34. 1.6Northern California · 15160 days ago · 1 km deep · 3 km away
  35. 1.88 km W of Cobb, California · 15160 days ago · 0 km deep · 3 km away
  36. 2.25 km E of Santa Rosa, California · 15160 days ago · 0 km deep · 44 km away
  37. 1.67 km WSW of Cobb, California · 15160 days ago · 0 km deep · 3 km away
  38. 1.919 km WSW of Williams, California · 15159 days ago · 1 km deep · 48 km away
  39. 1.67 km WSW of Cobb, California · 15159 days ago · 1 km deep · 3 km away
  40. 1.64 km NNE of Clearlake, California · 15159 days ago · 0 km deep · 25 km away
  41. 1.97 km W of Cobb, California · 15159 days ago · 3 km deep · 3 km away
  42. 2.313 km SSW of Guinda, California · 15159 days ago · 0 km deep · 45 km away
  43. 1.62 km SSE of Clear Lake Riviera, California · 15159 days ago · 3 km deep · 14 km away
  44. 2.420 km WSW of Williams, California · 15158 days ago · 0 km deep · 47 km away
  45. 3.37 km W of Cobb, California · 15158 days ago · 4 km deep · 3 km away
  46. 1.818 km W of Williams, California · 15158 days ago · 4 km deep · 50 km away
  47. 1.77 km WSW of Cobb, California · 15158 days ago · 1 km deep · 3 km away
  48. 1.67 km W of Cobb, California · 15158 days ago · 3 km deep · 3 km away
  49. 1.65 km SW of Cobb, California · 15158 days ago · 0 km deep · 3 km away
  50. 1.62 km SW of Cobb, California · 15157 days ago · -1 km deep · 3 km away
  51. 1.75 km W of Cobb, California · 15157 days ago · 0 km deep · 1 km away
  52. 1.67 km W of Cobb, California · 15157 days ago · 3 km deep · 2 km away
  53. 1.78 km W of Cobb, California · 15157 days ago · 1 km deep · 4 km away
  54. 1.6Northern California · 15157 days ago · 9 km deep · 48 km away
  55. 2.56 km E of Santa Rosa, California · 15157 days ago · 1 km deep · 45 km away
  56. 1.66 km WSW of Cobb, California · 15156 days ago · 3 km deep · 2 km away
  57. 3.220 km WSW of Williams, California · 15156 days ago · 5 km deep · 47 km away
  58. 1.719 km WSW of Williams, California · 15156 days ago · 2 km deep · 48 km away
  59. 2.420 km WSW of Williams, California · 15156 days ago · 1 km deep · 48 km away
  60. 1.617 km W of Williams, California · 15156 days ago · 3 km deep · 51 km away

The first 60 of 179.

Before

  1. 1.7Northern California · 15169 days ago · 0 km deep · 1 km away
  2. 2.06 km W of Cobb, California · 15170 days ago · 2 km deep · 2 km away
  3. 1.56 km W of Cobb, California · 15170 days ago · 1 km deep · 2 km away
  4. 2.07 km WSW of Cobb, California · 15170 days ago · 0 km deep · 3 km away
  5. 1.55 km SW of Cobb, California · 15170 days ago · 0 km deep · 4 km away
  6. 2.48 km WSW of Cobb, California · 15170 days ago · 4 km deep · 4 km away
  7. 1.97 km WSW of Cobb, California · 15171 days ago · 1 km deep · 3 km away
  8. 1.87 km W of Cobb, California · 15171 days ago · 2 km deep · 3 km away
  9. 2.56 km W of Cobb, California · 15171 days ago · 1 km deep · 2 km away
  10. 2.05 km W of Glen Ellen, California · 15172 days ago · 0 km deep · 53 km away
  11. 2.54 km W of Glen Ellen, California · 15172 days ago · 9 km deep · 53 km away
  12. 3.020 km NNE of Upper Lake, California · 15172 days ago · 10 km deep · 57 km away
  13. 4.111 km NNE of Cloverdale, California · 15172 days ago · 13 km deep · 17 km away
  14. 1.98 km WSW of Cobb, California · 15172 days ago · 3 km deep · 4 km away
  15. 1.86 km WSW of Clear Lake Riviera, California · 15172 days ago · 6 km deep · 12 km away
  16. 1.56 km W of Cobb, California · 15173 days ago · 4 km deep · 1 km away
  17. 2.05 km SW of Cobb, California · 15174 days ago · 0 km deep · 3 km away
  18. 1.84 km ESE of Healdsburg, California · 15175 days ago · 6 km deep · 24 km away
  19. 1.59 km WSW of Cobb, California · 15175 days ago · 1 km deep · 5 km away
  20. 1.74 km W of Cobb, California · 15176 days ago · 0 km deep · 0 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc45202. Read Tue, Sep 29, 2026, 3:26 PM UTC.