California earthquakes

M1.5 earthquake 8 km WSW of Cobb, California

A magnitude 1.5 earthquake struck 8 km WSW of Cobb, California on Sat, Aug 10, 1985, 12:40 PM PDT (19:40 UTC), 4 km (2 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
1.5 (md), micro
Local time
UTC
1985-08-10 19:40:01 UTC
Depth
3.6 km (2.2 mi), shallow
Epicenter
38.800° N, 122.811° 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, 0.5 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
80°
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: 186 in the 60 days after this one and 90 in the 30 days before it.

After

  1. 1.713 km N of Brooktrails, California · 15024 days ago · 6 km deep · 98 km away
  2. 1.94 km W of Cobb, California · 15024 days ago · 0 km deep · 4 km away
  3. 1.85 km WNW of Cobb, California · 15022 days ago · 2 km deep · 6 km away
  4. 2.19 km E of Hidden Valley Lake, California · 15022 days ago · 7 km deep · 31 km away
  5. 1.77 km W of Cobb, California · 15022 days ago · 0 km deep · 2 km away
  6. 2.19 km WSW of Cobb, California · 15021 days ago · 1 km deep · 1 km away
  7. 1.56 km W of Cobb, California · 15021 days ago · 3 km deep · 2 km away
  8. 2.67 km WSW of Cobb, California · 15020 days ago · 0 km deep · 1 km away
  9. 2.67 km W of Cobb, California · 15020 days ago · 3 km deep · 1 km away
  10. 1.67 km WSW of Cobb, California · 15020 days ago · 0 km deep · 1 km away
  11. 2.16 km WSW of Cobb, California · 15020 days ago · 4 km deep · 2 km away
  12. 1.90 km ESE of Redwood Valley, California · 15020 days ago · 6 km deep · 62 km away
  13. 1.69 km NE of Hopland, California · 15019 days ago · 6 km deep · 33 km away
  14. 2.05 km SW of Cobb, California · 15019 days ago · 2 km deep · 3 km away
  15. 2.08 km WSW of Cobb, California · 15018 days ago · 4 km deep · 1 km away
  16. 2.16 km W of Cobb, California · 15018 days ago · 1 km deep · 3 km away
  17. 2.022 km WSW of Williams, California · 15017 days ago · 3 km deep · 48 km away
  18. 1.613 km ENE of Clearlake Oaks, California · 15017 days ago · 5 km deep · 38 km away
  19. 2.03 km W of Cobb, California · 15017 days ago · 0 km deep · 5 km away
  20. 1.52 km NNW of Clearlake, California · 15017 days ago · 2 km deep · 25 km away
  21. 1.97 km W of Cobb, California · 15016 days ago · 3 km deep · 1 km away
  22. 1.910 km SE of Hopland, California · 15015 days ago · 29 km deep · 22 km away
  23. 1.87 km W of Cobb, California · 15015 days ago · 3 km deep · 2 km away
  24. 1.86 km W of Cobb, California · 15015 days ago · 3 km deep · 2 km away
  25. 1.66 km NNE of Cloverdale, California · 15015 days ago · 5 km deep · 16 km away
  26. 1.66 km WNW of Cobb, California · 15015 days ago · 1 km deep · 4 km away
  27. 2.09 km SSE of Willits, California · 15014 days ago · 6 km deep · 73 km away
  28. 2.35 km W of Cobb, California · 15014 days ago · -1 km deep · 4 km away
  29. 2.26 km NW of Cobb, California · 15014 days ago · -1 km deep · 7 km away
  30. 2.85 km W of Cobb, California · 15013 days ago · 1 km deep · 4 km away
  31. 1.65 km WSW of Cobb, California · 15013 days ago · 1 km deep · 2 km away
  32. 1.76 km NE of Brooktrails, California · 15013 days ago · 7 km deep · 87 km away
  33. 1.55 km SW of Cobb, California · 15012 days ago · 1 km deep · 4 km away
  34. 1.55 km WSW of Cobb, California · 15012 days ago · 0 km deep · 3 km away
  35. 1.85 km WSW of Cobb, California · 15012 days ago · 0 km deep · 3 km away
  36. 2.07 km W of Cobb, California · 15012 days ago · 3 km deep · 2 km away
  37. 1.98 km WSW of Cobb, California · 15011 days ago · 3 km deep · 0 km away
  38. 2.28 km WSW of Cobb, California · 15011 days ago · 3 km deep · 0 km away
  39. 2.93 km NNE of Clearlake, California · 15010 days ago · 1 km deep · 27 km away
  40. 1.63 km NNE of Clearlake, California · 15010 days ago · -1 km deep · 27 km away
  41. 1.97 km WSW of Cobb, California · 15010 days ago · 4 km deep · 0 km away
  42. 2.05 km WNW of Cobb, California · 15010 days ago · 1 km deep · 4 km away
  43. 1.96 km WSW of Cobb, California · 15010 days ago · 3 km deep · 1 km away
  44. 1.63 km N of Clearlake, California · 15010 days ago · -1 km deep · 27 km away
  45. 1.69 km WSW of Cobb, California · 15009 days ago · 1 km deep · 2 km away
  46. 1.66 km NNE of Hopland, California · 15009 days ago · 0 km deep · 35 km away
  47. 2.19 km NNW of Kenwood, California · 15008 days ago · 6 km deep · 39 km away
  48. 1.67 km WSW of Cobb, California · 15007 days ago · 0 km deep · 1 km away
  49. 2.113 km NNW of Moskowite Corner, California · 15007 days ago · 0 km deep · 54 km away
  50. 1.86 km WSW of Cobb, California · 15007 days ago · 0 km deep · 2 km away
  51. 1.86 km WSW of Cobb, California · 15007 days ago · 1 km deep · 2 km away
  52. 2.20 km S of Brooktrails, California · 15007 days ago · -1 km deep · 86 km away
  53. 1.58 km W of Cobb, California · 15006 days ago · 1 km deep · 2 km away
  54. 2.013 km NW of Moskowite Corner, California · 15006 days ago · 0 km deep · 54 km away
  55. 2.513 km NW of Moskowite Corner, California · 15006 days ago · 0 km deep · 54 km away
  56. 2.015 km NNW of Moskowite Corner, California · 15006 days ago · 15 km deep · 55 km away
  57. 1.614 km NNW of Moskowite Corner, California · 15006 days ago · 3 km deep · 55 km away
  58. 1.58 km NNW of Moskowite Corner, California · 15005 days ago · 6 km deep · 60 km away
  59. 1.913 km NNW of Moskowite Corner, California · 15005 days ago · 2 km deep · 55 km away
  60. 2.25 km SW of Cobb, California · 15005 days ago · 0 km deep · 4 km away

The first 60 of 186.

Before

  1. 2.16 km W of Cobb, California · 15024 days ago · 0 km deep · 3 km away
  2. 1.96 km W of Cobb, California · 15024 days ago · 1 km deep · 3 km away
  3. 2.16 km W of Cobb, California · 15025 days ago · 3 km deep · 3 km away
  4. 2.08 km SSW of Colusa, California · 15025 days ago · 6 km deep · 76 km away
  5. 1.64 km WSW of Cobb, California · 15026 days ago · 1 km deep · 4 km away
  6. 2.14 km NW of Redwood Valley, California · 15026 days ago · 5 km deep · 66 km away
  7. 2.15 km SW of Cobb, California · 15026 days ago · 0 km deep · 3 km away
  8. 4.05 km SW of Cobb, California · 15026 days ago · -1 km deep · 3 km away
  9. 3.25 km SW of Cobb, California · 15026 days ago · 2 km deep · 4 km away
  10. 1.66 km SW of Cobb, California · 15026 days ago · 0 km deep · 4 km away
  11. 2.34 km NNE of Boonville, California · 15026 days ago · 4 km deep · 54 km away
  12. 1.66 km WSW of Cobb, California · 15027 days ago · 0 km deep · 1 km away
  13. 1.910 km SW of Williams, California · 15027 days ago · 15 km deep · 59 km away
  14. 2.14 km WSW of Cobb, California · 15027 days ago · 1 km deep · 4 km away
  15. 3.27 km W of Cobb, California · 15028 days ago · 1 km deep · 2 km away
  16. 2.26 km WSW of Cobb, California · 15028 days ago · 0 km deep · 1 km away
  17. 2.87 km W of Cobb, California · 15030 days ago · 3 km deep · 2 km away
  18. 1.53 km SSW of Cobb, California · 15031 days ago · 1 km deep · 6 km away
  19. 1.86 km E of Calpella, California · 15031 days ago · 5 km deep · 56 km away
  20. 2.021 km NNE of Upper Lake, California · 15031 days ago · 6 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc52692. Read Mon, Sep 28, 2026, 8:03 PM UTC.