California earthquakes

M2.7 earthquake 5 km W of Cobb, California

A magnitude 2.7 earthquake struck 5 km W of Cobb, California on Thu, Mar 21, 1985, 12:41 AM PST (08:41 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.2 20 km WSW of Williams, 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.7 (md), micro
Local time
UTC
1985-03-21 08:41:58 UTC
Depth
2.8 km (1.8 mi), shallow
Epicenter
38.820° N, 122.792° 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
±0.11
Depth from
From location
Station coverage gap
39°
Stations used
33

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 0 in the 30 days before it.

After

  1. 1.818 km W of Williams, California · 15151 days ago · 4 km deep · 50 km away
  2. 1.77 km WSW of Cobb, California · 15151 days ago · 1 km deep · 2 km away
  3. 1.67 km W of Cobb, California · 15151 days ago · 3 km deep · 2 km away
  4. 1.65 km SW of Cobb, California · 15151 days ago · 0 km deep · 4 km away
  5. 1.62 km SW of Cobb, California · 15151 days ago · -1 km deep · 4 km away
  6. 1.75 km W of Cobb, California · 15151 days ago · 0 km deep · 0 km away
  7. 1.67 km W of Cobb, California · 15151 days ago · 3 km deep · 1 km away
  8. 1.78 km W of Cobb, California · 15150 days ago · 1 km deep · 2 km away
  9. 1.6Northern California · 15150 days ago · 9 km deep · 49 km away
  10. 2.56 km E of Santa Rosa, California · 15150 days ago · 1 km deep · 45 km away
  11. 1.66 km WSW of Cobb, California · 15149 days ago · 3 km deep · 2 km away
  12. 3.220 km WSW of Williams, California · 15149 days ago · 5 km deep · 47 km away
  13. 1.719 km WSW of Williams, California · 15149 days ago · 2 km deep · 49 km away
  14. 2.420 km WSW of Williams, California · 15149 days ago · 1 km deep · 49 km away
  15. 1.617 km W of Williams, California · 15149 days ago · 3 km deep · 52 km away
  16. 1.56 km ESE of Hopland, California · 15149 days ago · 1 km deep · 27 km away
  17. 2.220 km WSW of Williams, California · 15149 days ago · 6 km deep · 48 km away
  18. 2.520 km WSW of Williams, California · 15149 days ago · 5 km deep · 48 km away
  19. 1.57 km WSW of Cobb, California · 15149 days ago · 5 km deep · 3 km away
  20. 1.64 km W of Cobb, California · 15149 days ago · -1 km deep · 2 km away
  21. 2.417 km WSW of Williams, California · 15148 days ago · 5 km deep · 51 km away
  22. 3.15 km WSW of Cobb, California · 15148 days ago · 0 km deep · 3 km away
  23. 1.95 km W of Cobb, California · 15147 days ago · 0 km deep · 1 km away
  24. 1.95 km SW of Cobb, California · 15147 days ago · 0 km deep · 3 km away
  25. 2.219 km WSW of Williams, California · 15146 days ago · 4 km deep · 49 km away
  26. 2.120 km WSW of Williams, California · 15146 days ago · 2 km deep · 48 km away
  27. 2.18 km WSW of Cobb, California · 15146 days ago · 3 km deep · 3 km away
  28. 1.76 km W of Cobb, California · 15146 days ago · 3 km deep · 1 km away
  29. 1.97 km WSW of Cobb, California · 15146 days ago · 1 km deep · 2 km away
  30. 1.94 km N of Larkfield-Wikiup, California · 15146 days ago · 3 km deep · 30 km away
  31. 2.67 km WSW of Cobb, California · 15145 days ago · 0 km deep · 2 km away
  32. 2.27 km NNE of Elk Creek, California · 15145 days ago · 12 km deep · 97 km away
  33. 1.68 km W of Cobb, California · 15145 days ago · 1 km deep · 2 km away
  34. 2.04 km NNW of Larkfield-Wikiup, California · 15145 days ago · 3 km deep · 30 km away
  35. 1.94 km W of Cobb, CA · 15145 days ago · 0 km deep · 2 km away
  36. 2.09 km N of Upper Lake, California · 15145 days ago · 4 km deep · 48 km away
  37. 2.63 km SSE of Clear Lake Riviera, California · 15144 days ago · 2 km deep · 14 km away
  38. 1.72 km SSE of Clear Lake Riviera, California · 15144 days ago · 1 km deep · 15 km away
  39. 1.56 km WSW of Cobb, California · 15144 days ago · 0 km deep · 1 km away
  40. 2.15 km WSW of Cobb, California · 15144 days ago · 1 km deep · 1 km away
  41. 1.66 km WSW of Cobb, California · 15144 days ago · -1 km deep · 1 km away
  42. 1.75 km W of Cobb, California · 15144 days ago · 1 km deep · 1 km away
  43. 3.114 km N of Brooktrails, California · 15143 days ago · -1 km deep · 97 km away
  44. 1.820 km WSW of Williams, California · 15143 days ago · 4 km deep · 47 km away
  45. 2.55 km N of Windsor, California · 15143 days ago · 5 km deep · 25 km away
  46. 3.16 km W of Cobb, California · 15143 days ago · 4 km deep · 1 km away
  47. 1.78 km W of Cobb, California · 15143 days ago · 0 km deep · 2 km away
  48. 1.96 km W of Cobb, California · 15143 days ago · 0 km deep · 1 km away
  49. 2.15 km SW of Cobb, California · 15142 days ago · 1 km deep · 4 km away
  50. 1.76 km W of Cobb, California · 15142 days ago · 3 km deep · 1 km away
  51. 1.96 km W of Cobb, California · 15142 days ago · 3 km deep · 1 km away
  52. 2.26 km W of Cobb, California · 15141 days ago · 3 km deep · 0 km away
  53. 3.26 km WSW of Cobb, California · 15141 days ago · 4 km deep · 1 km away
  54. 2.16 km WSW of Cobb, California · 15141 days ago · 3 km deep · 1 km away
  55. 1.56 km WSW of Cobb, California · 15141 days ago · 4 km deep · 2 km away
  56. 1.513 km ESE of Hidden Valley Lake, California · 15141 days ago · 5 km deep · 33 km away
  57. 2.08 km WSW of Cobb, California · 15141 days ago · 4 km deep · 4 km away
  58. 1.67 km WSW of Cobb, California · 15141 days ago · 1 km deep · 2 km away
  59. 2.24 km SW of Cobb, California · 15140 days ago · 1 km deep · 5 km away
  60. 2.29 km WSW of Cobb, California · 15140 days ago · 1 km deep · 4 km away

The first 60 of 179.

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc44424. Read Tue, Sep 22, 2026, 8:27 PM UTC.