California earthquakes

M1.8 earthquake 13 km N of Brooktrails, California

A magnitude 1.8 earthquake struck 13 km N of Brooktrails, California on Mon, Feb 11, 1985, 9:28 AM PST (17:28 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.1 7 km W of Cobb, California. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1985-02-11 17:28:59 UTC
Depth
4.0 km (2.5 mi), shallow
Epicenter
39.562° N, 123.390° 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 0.3 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
92°
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: 200 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.17 km W of Cobb, California · 15192 days ago · 4 km deep · 97 km away
  2. 1.88 km WSW of Cobb, California · 15191 days ago · 3 km deep · 98 km away
  3. 1.63 km ENE of Redwood Valley, California · 15191 days ago · 4 km deep · 37 km away
  4. 2.326 km S of Ruth, California · 15191 days ago · -1 km deep · 52 km away
  5. 1.96 km W of Cobb, California · 15191 days ago · 4 km deep · 97 km away
  6. 1.66 km WSW of Cobb, California · 15190 days ago · 3 km deep · 98 km away
  7. 2.36 km WSW of Cobb, California · 15190 days ago · 3 km deep · 98 km away
  8. 2.08 km WSW of Cobb, California · 15190 days ago · 3 km deep · 98 km away
  9. 2.05 km E of Hopland, California · 15189 days ago · 0 km deep · 72 km away
  10. 2.213 km SSW of Laytonville, California · 15189 days ago · -1 km deep · 13 km away
  11. 1.65 km W of Laytonville, California · 15189 days ago · 5 km deep · 19 km away
  12. 1.64 km WSW of Laytonville, California · 15189 days ago · 2 km deep · 17 km away
  13. 2.113 km N of Upper Lake, California · 15189 days ago · 12 km deep · 50 km away
  14. 1.68 km W of Cobb, California · 15188 days ago · 0 km deep · 96 km away
  15. 1.66 km WSW of Cobb, California · 15188 days ago · 1 km deep · 98 km away
  16. 1.9Northern California · 15188 days ago · 3 km deep · 88 km away
  17. 2.25 km W of Cobb, California · 15188 days ago · 0 km deep · 97 km away
  18. 2.03 km NNE of Cloverdale, California · 15188 days ago · 3 km deep · 87 km away
  19. 1.86 km W of Cobb, California · 15187 days ago · 2 km deep · 98 km away
  20. 2.04 km SW of Clear Lake Riviera, California · 15187 days ago · 2 km deep · 89 km away
  21. 1.56 km WSW of Cobb, California · 15186 days ago · 1 km deep · 100 km away
  22. 2.17 km WSW of Cobb, California · 15186 days ago · 4 km deep · 99 km away
  23. 1.67 km WSW of Cobb, California · 15186 days ago · 1 km deep · 98 km away
  24. 2.16 km W of Cobb, California · 15185 days ago · 3 km deep · 97 km away
  25. 2.47 km W of Cobb, California · 15185 days ago · 3 km deep · 96 km away
  26. 2.78 km W of Cobb, California · 15183 days ago · 0 km deep · 96 km away
  27. 1.87 km W of Cobb, California · 15183 days ago · -1 km deep · 97 km away
  28. 3.110 km NW of Cobb, California · 15183 days ago · 8 km deep · 90 km away
  29. 1.79 km NE of Covelo, California · 15183 days ago · 7 km deep · 38 km away
  30. 2.34 km WSW of Cobb, California · 15183 days ago · 1 km deep · 100 km away
  31. 2.24 km NNE of Clearlake, California · 15182 days ago · 1 km deep · 93 km away
  32. 2.04 km NNE of Clearlake, California · 15182 days ago · 1 km deep · 92 km away
  33. 1.66 km W of Cobb, California · 15182 days ago · 3 km deep · 97 km away
  34. 1.86 km NW of North Lakeport, California · 15182 days ago · 1 km deep · 61 km away
  35. 1.86 km W of Cobb, California · 15182 days ago · 3 km deep · 97 km away
  36. 1.87 km WSW of Cobb, California · 15182 days ago · 1 km deep · 98 km away
  37. 1.76 km NW of North Lakeport, California · 15180 days ago · 5 km deep · 61 km away
  38. 2.38 km W of Cobb, California · 15180 days ago · 0 km deep · 97 km away
  39. 1.98 km W of Cobb, California · 15180 days ago · 0 km deep · 97 km away
  40. 2.52 km SSE of Clear Lake Riviera, California · 15180 days ago · 1 km deep · 91 km away
  41. 1.90 km NNE of Clearlake, California · 15180 days ago · 4 km deep · 94 km away
  42. 1.5Northern California · 15180 days ago · -1 km deep · 91 km away
  43. 1.67 km W of Cobb, California · 15179 days ago · 3 km deep · 97 km away
  44. 1.64 km WSW of Cobb, California · 15179 days ago · 1 km deep · 100 km away
  45. 1.77 km W of Cobb, California · 15179 days ago · 3 km deep · 97 km away
  46. 2.02 km SE of Clear Lake Riviera, California · 15178 days ago · 2 km deep · 92 km away
  47. 2.77 km WSW of Cobb, California · 15178 days ago · 2 km deep · 98 km away
  48. 1.87 km WSW of Cobb, California · 15178 days ago · 2 km deep · 98 km away
  49. 3.1Northern California · 15176 days ago · 3 km deep · 97 km away
  50. 2.46 km NNE of Cloverdale, California · 15176 days ago · 18 km deep · 86 km away
  51. 1.56 km W of Cobb, California · 15176 days ago · 3 km deep · 97 km away
  52. 1.67 km W of Cobb, California · 15176 days ago · 4 km deep · 97 km away
  53. 2.82 km SE of Clear Lake Riviera, California · 15175 days ago · 2 km deep · 92 km away
  54. 3.52 km SE of Clear Lake Riviera, California · 15175 days ago · 2 km deep · 92 km away
  55. 2.94 km SE of Clear Lake Riviera, California · 15175 days ago · -1 km deep · 93 km away
  56. 1.82 km SE of Clear Lake Riviera, California · 15175 days ago · 1 km deep · 92 km away
  57. 1.92 km S of Clear Lake Riviera, California · 15175 days ago · -1 km deep · 91 km away
  58. 1.93 km SE of Clear Lake Riviera, California · 15175 days ago · 2 km deep · 92 km away
  59. 1.92 km ESE of Clear Lake Riviera, California · 15175 days ago · 4 km deep · 91 km away
  60. 1.63 km SSE of Clear Lake Riviera, California · 15175 days ago · 2 km deep · 92 km away

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc43069. Read Tue, Sep 22, 2026, 11:13 AM UTC.