California earthquakes

M1.7 earthquake 8 km WNW of Cobb, California

A magnitude 1.7 earthquake struck 8 km WNW of Cobb, California on Thu, Dec 13, 1979, 1:40 PM PST (21:40 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M1.7 4 km WSW 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
1.7 (md), micro
Local time
UTC
1979-12-13 21:40:13 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
38.848° N, 122.817° 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, 0.7 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
51°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 115 in the 60 days after this one and 56 in the 30 days before it.

After

  1. 1.76 km W of Cobb, California · 17085 days ago · 0 km deep · 4 km away
  2. 1.67 km WSW of Cobb, California · 17084 days ago · 0 km deep · 5 km away
  3. 1.59 km WSW of Cobb, California · 17081 days ago · 2 km deep · 5 km away
  4. 1.74 km WSW of Cobb, California · 17081 days ago · 1 km deep · 7 km away
  5. 2.64 km WSW of Cobb, California · 17081 days ago · 4 km deep · 6 km away
  6. 1.97 km NNE of Black Point-Green Point, California · 17081 days ago · 7 km deep · 80 km away
  7. 1.66 km WSW of Cobb, California · 17079 days ago · 0 km deep · 5 km away
  8. 1.68 km W of Cobb, California · 17079 days ago · 1 km deep · 4 km away
  9. 3.07 km WSW of Cobb, California · 17079 days ago · 1 km deep · 5 km away
  10. 2.48 km WSW of Cobb, California · 17079 days ago · -1 km deep · 5 km away
  11. 1.88 km W of Cobb, California · 17079 days ago · 1 km deep · 4 km away
  12. 1.910 km ESE of Willits, California · 17078 days ago · 11 km deep · 68 km away
  13. 1.86 km W of Cobb, California · 17078 days ago · 1 km deep · 4 km away
  14. 1.54 km WSW of Cobb, California · 17078 days ago · 1 km deep · 7 km away
  15. 1.67 km WSW of Cobb, California · 17076 days ago · 2 km deep · 5 km away
  16. 1.89 km SE of Hopland, California · 17076 days ago · 3 km deep · 20 km away
  17. 1.76 km W of Cobb, California · 17076 days ago · 4 km deep · 4 km away
  18. 1.76 km NNE of Dixon, California · 17075 days ago · 10 km deep · 98 km away
  19. 2.418 km E of Potter Valley, California · 17075 days ago · 4 km deep · 54 km away
  20. 1.75 km W of Cobb, California · 17074 days ago · 1 km deep · 4 km away
  21. 1.54 km WSW of Cobb, California · 17074 days ago · 1 km deep · 6 km away
  22. 1.57 km W of Cobb, California · 17074 days ago · 0 km deep · 3 km away
  23. 1.97 km WSW of Cobb, California · 17074 days ago · 1 km deep · 5 km away
  24. 1.94 km WSW of Cobb, California · 17073 days ago · 1 km deep · 6 km away
  25. 2.07 km W of Cobb, California · 17072 days ago · 1 km deep · 2 km away
  26. 2.27 km W of Cobb, California · 17072 days ago · 1 km deep · 3 km away
  27. 2.05 km W of Brooktrails, California · 17072 days ago · 5 km deep · 85 km away
  28. 1.89 km NW of Montalvin, California · 17072 days ago · 4 km deep · 95 km away
  29. 2.24 km WSW of Cobb, California · 17072 days ago · 2 km deep · 6 km away
  30. 1.54 km WSW of Cobb, California · 17071 days ago · 2 km deep · 6 km away
  31. 2.07 km WSW of Cobb, California · 17071 days ago · 0 km deep · 5 km away
  32. 1.99 km WSW of Cobb, California · 17071 days ago · 2 km deep · 5 km away
  33. 2.16 km NNE of Healdsburg, California · 17068 days ago · -1 km deep · 20 km away
  34. 2.16 km W of Cobb, California · 17068 days ago · 0 km deep · 3 km away
  35. 2.06 km W of Cobb, California · 17068 days ago · 3 km deep · 3 km away
  36. 1.99 km WSW of Cobb, California · 17067 days ago · 1 km deep · 5 km away
  37. 1.77 km WSW of Cobb, California · 17067 days ago · 1 km deep · 5 km away
  38. 1.74 km WSW of Cobb, California · 17066 days ago · 1 km deep · 7 km away
  39. 2.07 km WSW of Cobb, California · 17064 days ago · 2 km deep · 5 km away
  40. 1.69 km SW of Hopland, California · 17064 days ago · 1 km deep · 34 km away
  41. 1.74 km WSW of Cobb, California · 17062 days ago · 2 km deep · 7 km away
  42. 1.721 km NNE of Upper Lake, California · 17062 days ago · 4 km deep · 56 km away
  43. 1.65 km SSW of Clear Lake Riviera, California · 17062 days ago · 5 km deep · 9 km away
  44. 1.64 km WSW of Cobb, California · 17059 days ago · 1 km deep · 7 km away
  45. 2.19 km WSW of Cobb, California · 17058 days ago · 1 km deep · 5 km away
  46. 1.74 km N of Lucerne, California · 17058 days ago · 16 km deep · 32 km away
  47. 3.06 km NE of Santa Rosa, California · 17058 days ago · 7 km deep · 44 km away
  48. 2.16 km NE of Santa Rosa, California · 17058 days ago · 6 km deep · 44 km away
  49. 1.85 km WSW of Cobb, California · 17058 days ago · 0 km deep · 6 km away
  50. 2.36 km W of Cobb, California · 17057 days ago · 0 km deep · 4 km away
  51. 2.023 km NNE of Potter Valley, California · 17057 days ago · 9 km deep · 75 km away
  52. 1.614 km ENE of Hidden Valley Lake, California · 17056 days ago · 12 km deep · 35 km away
  53. 1.67 km NE of Philo, California · 17055 days ago · 0 km deep · 58 km away
  54. 1.74 km WSW of Cobb, California · 17055 days ago · 1 km deep · 7 km away
  55. 3.111 km NNW of Potter Valley, California · 17054 days ago · 12 km deep · 70 km away
  56. 2.110 km NNW of Potter Valley, California · 17054 days ago · 7 km deep · 69 km away
  57. 1.63 km WNW of Clear Lake Riviera, California · 17053 days ago · 10 km deep · 14 km away
  58. 1.56 km WSW of Cobb, California · 17053 days ago · 1 km deep · 5 km away
  59. 1.77 km WSW of Cobb, California · 17053 days ago · 0 km deep · 5 km away
  60. 1.77 km WSW of Cobb, California · 17052 days ago · 2 km deep · 5 km away

The first 60 of 115.

Before

  1. 2.07 km WSW of Cobb, California · 17086 days ago · 0 km deep · 4 km away
  2. 1.77 km WSW of Cobb, California · 17086 days ago · 2 km deep · 5 km away
  3. 1.67 km WSW of Cobb, California · 17086 days ago · 1 km deep · 5 km away
  4. 2.08 km WSW of Cobb, California · 17087 days ago · 0 km deep · 5 km away
  5. 1.87 km W of Cobb, California · 17087 days ago · 1 km deep · 1 km away
  6. 1.96 km W of Cobb, California · 17087 days ago · 0 km deep · 4 km away
  7. 1.510 km W of Cobb, California · 17088 days ago · 1 km deep · 5 km away
  8. 1.82 km E of Calpella, California · 17089 days ago · 4 km deep · 53 km away
  9. 1.68 km W of Cobb, California · 17089 days ago · 1 km deep · 4 km away
  10. 1.56 km W of Cobb, California · 17089 days ago · 3 km deep · 4 km away
  11. 2.56 km W of Cobb, California · 17089 days ago · 3 km deep · 4 km away
  12. 1.69 km WSW of Cobb, California · 17089 days ago · 1 km deep · 5 km away
  13. 2.15 km W of Cobb, California · 17089 days ago · 0 km deep · 4 km away
  14. 1.69 km WSW of Cobb, California · 17089 days ago · 1 km deep · 5 km away
  15. 2.36 km WSW of Cobb, California · 17089 days ago · 0 km deep · 5 km away
  16. 2.36 km WSW of Cobb, California · 17089 days ago · 1 km deep · 5 km away
  17. 1.66 km WSW of Cobb, California · 17089 days ago · 1 km deep · 5 km away
  18. 1.86 km WSW of Cobb, California · 17090 days ago · 0 km deep · 5 km away
  19. 1.98 km WSW of Cobb, California · 17090 days ago · 1 km deep · 5 km away
  20. 1.66 km E of Cloverdale, California · 17090 days ago · 2 km deep · 12 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1049327. Read Tue, Sep 22, 2026, 9:41 PM UTC.