California earthquakes

M3.4 earthquake 5 km SW of Cobb, California

A magnitude 3.4 earthquake struck 5 km SW of Cobb, California on Sat, Apr 13, 1985, 2:15 AM PST (10:15 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.6 9 km ESE 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
3.4 (md), minor
Local time
UTC
1985-04-13 10:15:25 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
38.791° N, 122.774° 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, 0.3 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
33°
Stations used
40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.28 km WSW of Cobb, California · 15123 days ago · 3 km deep · 4 km away
  2. 1.76 km NE of Brooktrails, California · 15123 days ago · 6 km deep · 90 km away
  3. 1.7Northern California · 15122 days ago · 2 km deep · 2 km away
  4. 2.1Northern California · 15122 days ago · 2 km deep · 27 km away
  5. 2.74 km W of Cobb, California · 15122 days ago · 0 km deep · 4 km away
  6. 1.66 km W of Cobb, California · 15122 days ago · -1 km deep · 5 km away
  7. 1.66 km W of Cobb, California · 15122 days ago · -1 km deep · 5 km away
  8. 1.69 km W of Cobb, California · 15122 days ago · 1 km deep · 5 km away
  9. 1.59 km W of Cobb, California · 15122 days ago · 1 km deep · 6 km away
  10. 1.77 km WSW of Cobb, California · 15121 days ago · 1 km deep · 3 km away
  11. 2.45 km SW of Cobb, California · 15121 days ago · 0 km deep · 0 km away
  12. 2.06 km WNW of Guinda, California · 15121 days ago · 3 km deep · 44 km away
  13. 1.85 km SW of Cobb, California · 15121 days ago · 2 km deep · 0 km away
  14. 1.77 km WSW of Cobb, California · 15121 days ago · 1 km deep · 3 km away
  15. 2.55 km WSW of Cobb, California · 15120 days ago · 3 km deep · 0 km away
  16. 2.57 km SW of Meridian, California · 15120 days ago · 10 km deep · 76 km away
  17. 2.16 km W of Cobb, California · 15120 days ago · 3 km deep · 4 km away
  18. 1.77 km W of Cobb, California · 15119 days ago · 1 km deep · 4 km away
  19. 1.85 km ESE of Willits, California · 15119 days ago · 0 km deep · 80 km away
  20. 2.321 km WSW of Williams, California · 15119 days ago · 0 km deep · 48 km away
  21. 1.85 km W of Angwin, California · 15117 days ago · 8 km deep · 33 km away
  22. 1.86 km W of Cobb, California · 15117 days ago · -1 km deep · 4 km away
  23. 2.15 km SSW of Cobb, California · 15116 days ago · 1 km deep · 2 km away
  24. 1.712 km WNW of Cobb, California · 15116 days ago · 1 km deep · 10 km away
  25. 1.610 km NW of Cobb, California · 15115 days ago · 2 km deep · 10 km away
  26. 1.67 km W of Cobb, California · 15115 days ago · 3 km deep · 4 km away
  27. 1.6Northern California · 15114 days ago · 3 km deep · 4 km away
  28. 1.54 km S of Cobb, California · 15114 days ago · 2 km deep · 5 km away
  29. 1.88 km W of Cobb, California · 15113 days ago · 1 km deep · 5 km away
  30. 1.68 km W of Cobb, California · 15113 days ago · 1 km deep · 5 km away
  31. 1.86 km W of Cobb, California · 15112 days ago · 0 km deep · 4 km away
  32. 2.36 km W of Cobb, California · 15112 days ago · 0 km deep · 4 km away
  33. 1.56 km W of Cobb, California · 15112 days ago · 0 km deep · 5 km away
  34. 1.69 km WSW of Cobb, California · 15111 days ago · 2 km deep · 4 km away
  35. 1.57 km WSW of Cobb, California · 15111 days ago · 2 km deep · 3 km away
  36. 1.55 km SW of Cobb, California · 15110 days ago · 0 km deep · 1 km away
  37. 2.36 km W of Cobb, California · 15110 days ago · 2 km deep · 3 km away
  38. 2.27 km W of Cobb, California · 15110 days ago · 2 km deep · 4 km away
  39. 2.14 km WSW of Cobb, California · 15110 days ago · 1 km deep · 1 km away
  40. 2.86 km WSW of Cobb, California · 15109 days ago · 0 km deep · 2 km away
  41. 2.27 km WSW of Cobb, California · 15109 days ago · 1 km deep · 3 km away
  42. 2.16 km W of Cobb, California · 15109 days ago · 3 km deep · 4 km away
  43. 1.86 km W of Cobb, California · 15108 days ago · 3 km deep · 4 km away
  44. 1.97 km W of Cobb, California · 15107 days ago · 1 km deep · 5 km away
  45. 2.15 km ENE of Calpella, California · 15107 days ago · 6 km deep · 60 km away
  46. 2.13 km SW of Cobb, California · 15107 days ago · 1 km deep · 2 km away
  47. 1.619 km E of Potter Valley, California · 15107 days ago · 5 km deep · 63 km away
  48. 2.17 km WSW of Cobb, California · 15107 days ago · 1 km deep · 3 km away
  49. 1.94 km ENE of Calpella, California · 15107 days ago · 0 km deep · 60 km away
  50. 2.67 km W of Cobb, California · 15106 days ago · 3 km deep · 4 km away
  51. 1.68 km WSW of Cobb, California · 15106 days ago · 3 km deep · 4 km away
  52. 1.617 km NE of Upper Lake, California · 15106 days ago · 4 km deep · 55 km away
  53. 1.67 km W of Cobb, California · 15106 days ago · 0 km deep · 5 km away
  54. 1.95 km SW of Cobb, California · 15106 days ago · 1 km deep · 2 km away
  55. 2.07 km WSW of Cobb, California · 15105 days ago · 2 km deep · 4 km away
  56. 1.56 km NW of Cobb, California · 15105 days ago · 1 km deep · 8 km away
  57. 2.46 km W of Cobb, California · 15105 days ago · 3 km deep · 4 km away
  58. 1.76 km W of Cobb, California · 15105 days ago · 3 km deep · 4 km away
  59. 1.59 km W of Cobb, California · 15105 days ago · 1 km deep · 6 km away
  60. 2.48 km WSW of Cobb, California · 15104 days ago · 3 km deep · 4 km away

The first 60 of 183.

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc46091 (also filed as usp0002ds3). Read Tue, Sep 22, 2026, 8:10 PM UTC.