California earthquakes

M2.3 earthquake 6 km WSW of Cobb, California

A magnitude 2.3 earthquake struck 6 km WSW of Cobb, California on Sun, Dec 9, 1979, 8:06 AM PST (16:06 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.5 6 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
2.3 (md), micro
Local time
UTC
1979-12-09 16:06:47 UTC
Depth
0.1 km (0.1 mi), shallow
Epicenter
38.807° N, 122.793° 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, 0.8 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
122°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 120 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 1.69 km WSW of Cobb, California · 17089 days ago · 1 km deep · 4 km away
  2. 2.15 km W of Cobb, California · 17089 days ago · 0 km deep · 2 km away
  3. 1.69 km WSW of Cobb, California · 17089 days ago · 1 km deep · 4 km away
  4. 2.56 km W of Cobb, California · 17088 days ago · 3 km deep · 1 km away
  5. 1.56 km W of Cobb, California · 17088 days ago · 3 km deep · 1 km away
  6. 1.68 km W of Cobb, California · 17088 days ago · 1 km deep · 2 km away
  7. 1.82 km E of Calpella, California · 17088 days ago · 4 km deep · 58 km away
  8. 1.510 km W of Cobb, California · 17087 days ago · 1 km deep · 5 km away
  9. 1.96 km W of Cobb, California · 17087 days ago · 0 km deep · 1 km away
  10. 1.87 km W of Cobb, California · 17086 days ago · 1 km deep · 4 km away
  11. 2.08 km WSW of Cobb, California · 17086 days ago · 0 km deep · 2 km away
  12. 1.67 km WSW of Cobb, California · 17086 days ago · 1 km deep · 2 km away
  13. 1.77 km WSW of Cobb, California · 17086 days ago · 2 km deep · 1 km away
  14. 2.07 km WSW of Cobb, California · 17086 days ago · 0 km deep · 1 km away
  15. 1.78 km WNW of Cobb, California · 17085 days ago · 1 km deep · 5 km away
  16. 1.76 km W of Cobb, California · 17084 days ago · 0 km deep · 1 km away
  17. 1.67 km WSW of Cobb, California · 17084 days ago · 0 km deep · 1 km away
  18. 1.59 km WSW of Cobb, California · 17081 days ago · 2 km deep · 3 km away
  19. 1.74 km WSW of Cobb, California · 17081 days ago · 1 km deep · 2 km away
  20. 2.64 km WSW of Cobb, California · 17080 days ago · 4 km deep · 2 km away
  21. 1.97 km NNE of Black Point-Green Point, California · 17080 days ago · 7 km deep · 75 km away
  22. 1.66 km WSW of Cobb, California · 17079 days ago · 0 km deep · 0 km away
  23. 1.68 km W of Cobb, California · 17079 days ago · 1 km deep · 2 km away
  24. 3.07 km WSW of Cobb, California · 17078 days ago · 1 km deep · 1 km away
  25. 2.48 km WSW of Cobb, California · 17078 days ago · -1 km deep · 2 km away
  26. 1.88 km W of Cobb, California · 17078 days ago · 1 km deep · 2 km away
  27. 1.910 km ESE of Willits, California · 17078 days ago · 11 km deep · 73 km away
  28. 1.86 km W of Cobb, California · 17078 days ago · 1 km deep · 1 km away
  29. 1.54 km WSW of Cobb, California · 17077 days ago · 1 km deep · 2 km away
  30. 1.67 km WSW of Cobb, California · 17075 days ago · 2 km deep · 1 km away
  31. 1.89 km SE of Hopland, California · 17075 days ago · 3 km deep · 24 km away
  32. 1.76 km W of Cobb, California · 17075 days ago · 4 km deep · 1 km away
  33. 1.76 km NNE of Dixon, California · 17075 days ago · 10 km deep · 94 km away
  34. 2.418 km E of Potter Valley, California · 17074 days ago · 4 km deep · 59 km away
  35. 1.75 km W of Cobb, California · 17074 days ago · 1 km deep · 1 km away
  36. 1.54 km WSW of Cobb, California · 17074 days ago · 1 km deep · 2 km away
  37. 1.57 km W of Cobb, California · 17074 days ago · 0 km deep · 2 km away
  38. 1.97 km WSW of Cobb, California · 17074 days ago · 1 km deep · 1 km away
  39. 1.94 km WSW of Cobb, California · 17073 days ago · 1 km deep · 2 km away
  40. 2.07 km W of Cobb, California · 17072 days ago · 1 km deep · 3 km away
  41. 2.27 km W of Cobb, California · 17072 days ago · 1 km deep · 2 km away
  42. 2.05 km W of Brooktrails, California · 17072 days ago · 5 km deep · 90 km away
  43. 1.89 km NW of Montalvin, California · 17072 days ago · 4 km deep · 90 km away
  44. 2.24 km WSW of Cobb, California · 17071 days ago · 2 km deep · 2 km away
  45. 1.54 km WSW of Cobb, California · 17071 days ago · 2 km deep · 2 km away
  46. 2.07 km WSW of Cobb, California · 17071 days ago · 0 km deep · 1 km away
  47. 1.99 km WSW of Cobb, California · 17070 days ago · 2 km deep · 3 km away
  48. 2.16 km NNE of Healdsburg, California · 17068 days ago · -1 km deep · 16 km away
  49. 2.16 km W of Cobb, California · 17068 days ago · 0 km deep · 2 km away
  50. 2.06 km W of Cobb, California · 17068 days ago · 3 km deep · 2 km away
  51. 1.99 km WSW of Cobb, California · 17067 days ago · 1 km deep · 4 km away
  52. 1.77 km WSW of Cobb, California · 17067 days ago · 1 km deep · 1 km away
  53. 1.74 km WSW of Cobb, California · 17066 days ago · 1 km deep · 2 km away
  54. 2.07 km WSW of Cobb, California · 17064 days ago · 2 km deep · 1 km away
  55. 1.69 km SW of Hopland, California · 17063 days ago · 1 km deep · 37 km away
  56. 1.74 km WSW of Cobb, California · 17062 days ago · 2 km deep · 2 km away
  57. 1.721 km NNE of Upper Lake, California · 17062 days ago · 4 km deep · 61 km away
  58. 1.65 km SSW of Clear Lake Riviera, California · 17061 days ago · 5 km deep · 12 km away
  59. 1.64 km WSW of Cobb, California · 17059 days ago · 1 km deep · 2 km away
  60. 2.19 km WSW of Cobb, California · 17058 days ago · 1 km deep · 3 km away

The first 60 of 120.

Before

  1. 2.36 km WSW of Cobb, California · 17089 days ago · 1 km deep · 0 km away
  2. 1.66 km WSW of Cobb, California · 17089 days ago · 1 km deep · 0 km away
  3. 1.86 km WSW of Cobb, California · 17089 days ago · 0 km deep · 0 km away
  4. 1.98 km WSW of Cobb, California · 17090 days ago · 1 km deep · 2 km away
  5. 1.66 km E of Cloverdale, California · 17090 days ago · 2 km deep · 13 km away
  6. 1.69 km WSW of Cobb, California · 17090 days ago · 1 km deep · 4 km away
  7. 1.96 km W of Cobb, California · 17091 days ago · 1 km deep · 0 km away
  8. 2.06 km W of Cobb, California · 17091 days ago · 1 km deep · 2 km away
  9. 1.87 km W of Cobb, California · 17092 days ago · 0 km deep · 2 km away
  10. 1.95 km NW of Redwood Valley, California · 17092 days ago · 7 km deep · 67 km away
  11. 1.98 km W of Cobb, California · 17093 days ago · 1 km deep · 3 km away
  12. 1.58 km WSW of Cobb, California · 17093 days ago · 1 km deep · 2 km away
  13. 1.97 km WSW of Cobb, California · 17094 days ago · 0 km deep · 1 km away
  14. 1.67 km W of Cobb, California · 17094 days ago · 1 km deep · 3 km away
  15. 1.57 km W of Cobb, California · 17094 days ago · 1 km deep · 2 km away
  16. 2.08 km W of Cobb, California · 17094 days ago · 1 km deep · 3 km away
  17. 1.58 km W of Cobb, California · 17094 days ago · 1 km deep · 3 km away
  18. 1.66 km WSW of Cobb, California · 17095 days ago · 1 km deep · 0 km away
  19. 1.88 km WSW of Cobb, California · 17096 days ago · 1 km deep · 2 km away
  20. 1.95 km NNE of Kenwood, California · 17099 days ago · 9 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1049249. Read Tue, Sep 22, 2026, 11:15 AM UTC.