California earthquakes

M1.8 earthquake 6 km WSW of Cobb, California

A magnitude 1.8 earthquake struck 6 km WSW of Cobb, California on Fri, Feb 15, 1985, 1:06 AM PST (09:06 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M4.1 11 km NNE of Cloverdale, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1985-02-15 09:06:19 UTC
Depth
0.8 km (0.5 mi), shallow
Epicenter
38.806° N, 122.794° 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 0.1 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
57°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 188 in the 60 days after this one and 113 in the 30 days before it.

After

  1. 3.46 km WSW of Cobb, California · 15203 days ago · 0 km deep · 1 km away
  2. 2.07 km WSW of Cobb, California · 15203 days ago · 0 km deep · 1 km away
  3. 2.922 km NNE of Potter Valley, California · 15203 days ago · 7 km deep · 79 km away
  4. 2.022 km NNE of Potter Valley, California · 15203 days ago · 7 km deep · 79 km away
  5. 1.68 km W of Cobb, California · 15202 days ago · 0 km deep · 3 km away
  6. 1.75 km SW of Cobb, California · 15202 days ago · 1 km deep · 3 km away
  7. 2.37 km W of Cobb, California · 15202 days ago · 1 km deep · 3 km away
  8. 2.75 km SW of Cobb, California · 15202 days ago · 1 km deep · 4 km away
  9. 2.07 km W of Cobb, California · 15201 days ago · 3 km deep · 2 km away
  10. 1.69 km ESE of Hidden Valley Lake, California · 15201 days ago · 6 km deep · 30 km away
  11. 1.81 km SE of Clearlake, California · 15201 days ago · 9 km deep · 22 km away
  12. 2.17 km W of Cobb, California · 15201 days ago · 4 km deep · 1 km away
  13. 1.88 km WSW of Cobb, California · 15200 days ago · 3 km deep · 2 km away
  14. 1.63 km ENE of Redwood Valley, California · 15200 days ago · 4 km deep · 61 km away
  15. 1.96 km W of Cobb, California · 15200 days ago · 4 km deep · 2 km away
  16. 1.66 km WSW of Cobb, California · 15199 days ago · 3 km deep · 0 km away
  17. 2.36 km WSW of Cobb, California · 15199 days ago · 3 km deep · 0 km away
  18. 1.75 km SW of Cobb, California · 15199 days ago · 1 km deep · 4 km away
  19. 2.08 km WSW of Cobb, California · 15199 days ago · 3 km deep · 2 km away
  20. 2.05 km E of Hopland, California · 15198 days ago · 0 km deep · 29 km away
  21. 1.65 km SW of Cobb, California · 15198 days ago · 1 km deep · 3 km away
  22. 2.113 km N of Upper Lake, California · 15198 days ago · 12 km deep · 54 km away
  23. 1.95 km SW of Cobb, California · 15198 days ago · 0 km deep · 2 km away
  24. 2.53 km SSW of Cobb, California · 15197 days ago · 1 km deep · 4 km away
  25. 1.68 km W of Cobb, California · 15197 days ago · 0 km deep · 3 km away
  26. 1.66 km WSW of Cobb, California · 15197 days ago · 1 km deep · 0 km away
  27. 1.9Northern California · 15197 days ago · 3 km deep · 14 km away
  28. 2.25 km W of Cobb, California · 15197 days ago · 0 km deep · 2 km away
  29. 2.03 km NNE of Cloverdale, California · 15197 days ago · 3 km deep · 19 km away
  30. 1.86 km W of Cobb, California · 15196 days ago · 2 km deep · 1 km away
  31. 2.04 km SW of Clear Lake Riviera, California · 15196 days ago · 2 km deep · 14 km away
  32. 1.56 km WSW of Cobb, California · 15195 days ago · 1 km deep · 1 km away
  33. 2.17 km WSW of Cobb, California · 15195 days ago · 4 km deep · 2 km away
  34. 1.67 km WSW of Cobb, California · 15195 days ago · 1 km deep · 1 km away
  35. 1.5Northern California · 15194 days ago · 1 km deep · 2 km away
  36. 2.16 km W of Cobb, California · 15194 days ago · 3 km deep · 2 km away
  37. 2.47 km W of Cobb, California · 15194 days ago · 3 km deep · 2 km away
  38. 1.76 km ENE of Santa Rosa, California · 15193 days ago · 10 km deep · 41 km away
  39. 2.03 km W of Forestville, California · 15192 days ago · 0 km deep · 39 km away
  40. 2.78 km W of Cobb, California · 15192 days ago · 0 km deep · 2 km away
  41. 1.87 km W of Cobb, California · 15192 days ago · -1 km deep · 2 km away
  42. 3.110 km NW of Cobb, California · 15192 days ago · 8 km deep · 9 km away
  43. 2.34 km WSW of Cobb, California · 15192 days ago · 1 km deep · 2 km away
  44. 2.24 km NNE of Clearlake, California · 15191 days ago · 1 km deep · 27 km away
  45. 2.04 km NNE of Clearlake, California · 15191 days ago · 1 km deep · 26 km away
  46. 1.79 km ESE of Black Point-Green Point, California · 15191 days ago · 14 km deep · 87 km away
  47. 1.66 km W of Cobb, California · 15191 days ago · 3 km deep · 2 km away
  48. 1.86 km NW of North Lakeport, California · 15191 days ago · 1 km deep · 38 km away
  49. 1.86 km W of Cobb, California · 15191 days ago · 3 km deep · 2 km away
  50. 1.87 km WSW of Cobb, California · 15191 days ago · 1 km deep · 1 km away
  51. 2.45 km SW of Cobb, California · 15190 days ago · 2 km deep · 3 km away
  52. 1.76 km NW of North Lakeport, California · 15189 days ago · 5 km deep · 38 km away
  53. 2.38 km W of Cobb, California · 15189 days ago · 0 km deep · 2 km away
  54. 1.98 km W of Cobb, California · 15189 days ago · 0 km deep · 2 km away
  55. 2.52 km SSE of Clear Lake Riviera, California · 15189 days ago · 1 km deep · 16 km away
  56. 1.90 km NNE of Clearlake, California · 15189 days ago · 4 km deep · 23 km away
  57. 1.5Northern California · 15189 days ago · -1 km deep · 15 km away
  58. 2.15 km SW of Cobb, California · 15189 days ago · 1 km deep · 4 km away
  59. 1.67 km W of Cobb, California · 15188 days ago · 3 km deep · 2 km away
  60. 1.64 km WSW of Cobb, California · 15188 days ago · 1 km deep · 2 km away

The first 60 of 188.

Before

  1. 1.66 km WSW of Cobb, California · 15203 days ago · 3 km deep · 0 km away
  2. 1.8Northern California · 15203 days ago · 1 km deep · 1 km away
  3. 2.122 km NNE of Potter Valley, California · 15204 days ago · 7 km deep · 79 km away
  4. 1.96 km W of Cobb, California · 15204 days ago · 3 km deep · 2 km away
  5. 1.68 km WSW of Upper Lake, California · 15205 days ago · 4 km deep · 40 km away
  6. 1.66 km W of Cobb, California · 15205 days ago · 3 km deep · 1 km away
  7. 1.56 km W of Cobb, California · 15206 days ago · 1 km deep · 2 km away
  8. 1.67 km N of Cloverdale, California · 15206 days ago · 1 km deep · 21 km away
  9. 2.76 km WNW of Cobb, California · 15206 days ago · 0 km deep · 3 km away
  10. 1.56 km W of Cobb, California · 15206 days ago · 3 km deep · 1 km away
  11. 2.15 km SW of Cobb, California · 15207 days ago · 1 km deep · 3 km away
  12. 1.813 km N of Brooktrails, California · 15207 days ago · 4 km deep · 98 km away
  13. 2.14 km WSW of Cobb, California · 15207 days ago · 1 km deep · 2 km away
  14. 1.67 km W of Cobb, California · 15207 days ago · 3 km deep · 2 km away
  15. 1.84 km W of Cobb, California · 15208 days ago · 0 km deep · 2 km away
  16. 2.53 km NNE of Clearlake, California · 15208 days ago · 0 km deep · 26 km away
  17. 2.07 km WSW of Cobb, California · 15208 days ago · 2 km deep · 1 km away
  18. 2.17 km WSW of Cobb, California · 15208 days ago · 2 km deep · 1 km away
  19. 1.94 km W of Cobb, California · 15209 days ago · 0 km deep · 2 km away
  20. 1.74 km NNE of Lucerne, California · 15209 days ago · 17 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc41026. Read Thu, Oct 1, 2026, 9:20 AM UTC.