California earthquakes

M1.7 earthquake 13 km N of Brooktrails, California

A magnitude 1.7 earthquake struck 13 km N of Brooktrails, California on Sat, Aug 10, 1985, 5:05 PM PDT (00:05 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M1.9 4 km W of Cobb, California. This one was a foreshock.

Brooktrails 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
1985-08-11 00:05:51 UTC
Depth
6.4 km (4.0 mi), shallow
Epicenter
39.564° N, 123.369° 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, 1.0 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
68°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 161 in the 60 days after this one and 38 in the 30 days before it.

After

  1. 1.94 km W of Cobb, California · 15018 days ago · 0 km deep · 97 km away
  2. 1.85 km WNW of Cobb, California · 15016 days ago · 2 km deep · 94 km away
  3. 1.77 km W of Cobb, California · 15016 days ago · 0 km deep · 96 km away
  4. 2.19 km WSW of Cobb, California · 15015 days ago · 1 km deep · 97 km away
  5. 1.56 km W of Cobb, California · 15015 days ago · 3 km deep · 96 km away
  6. 2.67 km WSW of Cobb, California · 15014 days ago · 0 km deep · 97 km away
  7. 2.67 km W of Cobb, California · 15014 days ago · 3 km deep · 96 km away
  8. 1.67 km WSW of Cobb, California · 15014 days ago · 0 km deep · 98 km away
  9. 2.16 km WSW of Cobb, California · 15014 days ago · 4 km deep · 98 km away
  10. 1.90 km ESE of Redwood Valley, California · 15014 days ago · 6 km deep · 36 km away
  11. 1.69 km NE of Hopland, California · 15013 days ago · 6 km deep · 65 km away
  12. 2.08 km WSW of Cobb, California · 15012 days ago · 4 km deep · 98 km away
  13. 2.16 km W of Cobb, California · 15012 days ago · 1 km deep · 96 km away
  14. 2.022 km WSW of Williams, California · 15011 days ago · 3 km deep · 98 km away
  15. 1.613 km ENE of Clearlake Oaks, California · 15011 days ago · 5 km deep · 93 km away
  16. 2.03 km W of Cobb, California · 15011 days ago · 0 km deep · 97 km away
  17. 1.52 km NNW of Clearlake, California · 15011 days ago · 2 km deep · 90 km away
  18. 1.97 km W of Cobb, California · 15010 days ago · 3 km deep · 96 km away
  19. 1.910 km SE of Hopland, California · 15009 days ago · 29 km deep · 79 km away
  20. 1.87 km W of Cobb, California · 15009 days ago · 3 km deep · 96 km away
  21. 1.86 km W of Cobb, California · 15009 days ago · 3 km deep · 96 km away
  22. 1.66 km NNE of Cloverdale, California · 15009 days ago · 5 km deep · 85 km away
  23. 1.66 km WNW of Cobb, California · 15009 days ago · 1 km deep · 95 km away
  24. 2.09 km SSE of Willits, California · 15008 days ago · 6 km deep · 26 km away
  25. 2.35 km W of Cobb, California · 15008 days ago · -1 km deep · 97 km away
  26. 2.26 km NW of Cobb, California · 15008 days ago · -1 km deep · 93 km away
  27. 2.85 km W of Cobb, California · 15008 days ago · 1 km deep · 96 km away
  28. 1.65 km WSW of Cobb, California · 15007 days ago · 1 km deep · 98 km away
  29. 1.76 km NE of Brooktrails, California · 15007 days ago · 7 km deep · 10 km away
  30. 1.55 km WSW of Cobb, California · 15006 days ago · 0 km deep · 100 km away
  31. 1.85 km WSW of Cobb, California · 15006 days ago · 0 km deep · 100 km away
  32. 2.07 km W of Cobb, California · 15006 days ago · 3 km deep · 96 km away
  33. 1.98 km WSW of Cobb, California · 15005 days ago · 3 km deep · 98 km away
  34. 2.28 km WSW of Cobb, California · 15005 days ago · 3 km deep · 97 km away
  35. 2.93 km NNE of Clearlake, California · 15004 days ago · 1 km deep · 91 km away
  36. 1.63 km NNE of Clearlake, California · 15004 days ago · -1 km deep · 91 km away
  37. 1.97 km WSW of Cobb, California · 15004 days ago · 4 km deep · 98 km away
  38. 2.05 km WNW of Cobb, California · 15004 days ago · 1 km deep · 96 km away
  39. 1.96 km WSW of Cobb, California · 15004 days ago · 3 km deep · 98 km away
  40. 1.63 km N of Clearlake, California · 15004 days ago · -1 km deep · 91 km away
  41. 1.69 km WSW of Cobb, California · 15004 days ago · 1 km deep · 97 km away
  42. 1.66 km NNE of Hopland, California · 15003 days ago · 0 km deep · 64 km away
  43. 1.67 km WSW of Cobb, California · 15002 days ago · 0 km deep · 97 km away
  44. 1.86 km WSW of Cobb, California · 15001 days ago · 0 km deep · 98 km away
  45. 1.86 km WSW of Cobb, California · 15001 days ago · 1 km deep · 98 km away
  46. 2.20 km S of Brooktrails, California · 15001 days ago · -1 km deep · 14 km away
  47. 1.58 km W of Cobb, California · 15000 days ago · 1 km deep · 95 km away
  48. 2.07 km W of Cobb, California · 14999 days ago · 3 km deep · 96 km away
  49. 2.520 km WSW of Williams, California · 14999 days ago · 2 km deep · 99 km away
  50. 2.220 km WSW of Williams, California · 14999 days ago · 0 km deep · 99 km away
  51. 2.021 km WSW of Williams, California · 14999 days ago · 2 km deep · 98 km away
  52. 1.94 km W of Cobb, California · 14998 days ago · 1 km deep · 98 km away
  53. 1.84 km W of Cobb, California · 14998 days ago · 0 km deep · 97 km away
  54. 1.96 km W of Cobb, California · 14997 days ago · 2 km deep · 97 km away
  55. 2.26 km W of Cobb, California · 14997 days ago · 0 km deep · 97 km away
  56. 2.420 km WSW of Williams, California · 14996 days ago · 2 km deep · 99 km away
  57. 2.620 km WSW of Williams, California · 14996 days ago · 2 km deep · 98 km away
  58. 1.89 km ESE of Willits, California · 14995 days ago · 8 km deep · 22 km away
  59. 1.922 km WSW of Williams, California · 14995 days ago · 2 km deep · 98 km away
  60. 1.78 km WSW of Cobb, California · 14995 days ago · 3 km deep · 97 km away

The first 60 of 161.

Before

  1. 1.58 km WSW of Cobb, California · 15018 days ago · 4 km deep · 98 km away
  2. 2.16 km W of Cobb, California · 15018 days ago · 0 km deep · 96 km away
  3. 1.96 km W of Cobb, California · 15018 days ago · 1 km deep · 96 km away
  4. 2.16 km W of Cobb, California · 15019 days ago · 3 km deep · 96 km away
  5. 1.69 km SW of Alderpoint, California · 15019 days ago · 22 km deep · 66 km away
  6. 1.64 km WSW of Cobb, California · 15020 days ago · 1 km deep · 99 km away
  7. 2.14 km NW of Redwood Valley, California · 15020 days ago · 5 km deep · 32 km away
  8. 2.15 km SW of Cobb, California · 15020 days ago · 0 km deep · 100 km away
  9. 4.05 km SW of Cobb, California · 15020 days ago · -1 km deep · 100 km away
  10. 2.34 km NNE of Boonville, California · 15020 days ago · 4 km deep · 57 km away
  11. 1.56 km W of Covelo, California · 15021 days ago · 6 km deep · 27 km away
  12. 1.66 km WSW of Cobb, California · 15021 days ago · 0 km deep · 98 km away
  13. 2.015 km SW of Paskenta, California · 15021 days ago · 6 km deep · 64 km away
  14. 2.14 km WSW of Cobb, California · 15021 days ago · 1 km deep · 99 km away
  15. 3.27 km W of Cobb, California · 15022 days ago · 1 km deep · 96 km away
  16. 2.26 km WSW of Cobb, California · 15022 days ago · 0 km deep · 99 km away
  17. 2.87 km W of Cobb, California · 15024 days ago · 3 km deep · 96 km away
  18. 1.86 km E of Calpella, California · 15025 days ago · 5 km deep · 41 km away
  19. 2.021 km NNE of Upper Lake, California · 15025 days ago · 6 km deep · 50 km away
  20. 1.65 km WSW of Hopland, California · 15026 days ago · 5 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc54278. Read Tue, Sep 22, 2026, 8:28 PM UTC.