California earthquakes

M1.8 earthquake 4 km WSW of Cobb, California

A magnitude 1.8 earthquake struck 4 km WSW of Cobb, California on Sat, Oct 20, 1979, 1:43 PM PDT (20:43 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.0 26 km SE of Covelo, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-10-20 20:43:06 UTC
Depth
1.1 km (0.7 mi), shallow
Epicenter
38.802° N, 122.768° 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, 0.5 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
77°
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: 93 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 1.56 km W of Cobb, California · 17148 days ago · 3 km deep · 3 km away
  2. 2.311 km N of Moskowite Corner, California · 17147 days ago · 3 km deep · 58 km away
  3. 1.54 km WSW of Cobb, California · 17146 days ago · 1 km deep · 0 km away
  4. 2.32 km ESE of Calpella, California · 17146 days ago · 4 km deep · 59 km away
  5. 2.12 km ESE of Calpella, California · 17146 days ago · 5 km deep · 59 km away
  6. 1.92 km ESE of Calpella, California · 17146 days ago · 4 km deep · 59 km away
  7. 1.63 km S of Geyserville, California · 17146 days ago · 4 km deep · 18 km away
  8. 1.78 km WSW of Cobb, California · 17146 days ago · 1 km deep · 4 km away
  9. 1.66 km W of Cobb, California · 17146 days ago · 0 km deep · 2 km away
  10. 1.76 km SW of Napa, California · 17144 days ago · 6 km deep · 72 km away
  11. 2.54 km WSW of Cobb, California · 17140 days ago · 1 km deep · 0 km away
  12. 1.57 km W of Cobb, California · 17139 days ago · 3 km deep · 4 km away
  13. 1.96 km WSW of Cobb, California · 17139 days ago · 0 km deep · 3 km away
  14. 1.78 km SE of Moskowite Corner, California · 17137 days ago · 8 km deep · 72 km away
  15. 1.66 km W of Cobb, California · 17136 days ago · 4 km deep · 3 km away
  16. 2.010 km ESE of Willits, California · 17134 days ago · 2 km deep · 76 km away
  17. 1.918 km ENE of Potter Valley, California · 17134 days ago · 4 km deep · 65 km away
  18. 2.24 km WSW of Cobb, California · 17134 days ago · 4 km deep · 1 km away
  19. 1.94 km WSW of Cobb, California · 17134 days ago · 2 km deep · 1 km away
  20. 2.29 km E of Angwin, California · 17133 days ago · 7 km deep · 46 km away
  21. 2.06 km W of Cobb, California · 17132 days ago · 3 km deep · 3 km away
  22. 2.64 km NW of Anchor Bay, California · 17132 days ago · 4 km deep · 73 km away
  23. 1.76 km ENE of Windsor, California · 17131 days ago · 4 km deep · 25 km away
  24. 1.617 km NE of Nice, California · 17131 days ago · 8 km deep · 49 km away
  25. 1.67 km WSW of Cobb, California · 17131 days ago · 2 km deep · 4 km away
  26. 2.59 km NW of Potter Valley, California · 17127 days ago · 16 km deep · 74 km away
  27. 1.67 km WSW of Cobb, California · 17126 days ago · 0 km deep · 3 km away
  28. 1.97 km W of Cobb, California · 17126 days ago · 1 km deep · 4 km away
  29. 2.06 km W of Cobb, California · 17125 days ago · 3 km deep · 3 km away
  30. 2.49 km SE of Willits, California · 17124 days ago · 8 km deep · 76 km away
  31. 2.1Northern California · 17123 days ago · 2 km deep · 0 km away
  32. 2.07 km N of Cobb, California · 17122 days ago · 1 km deep · 11 km away
  33. 2.85 km WSW of Glen Ellen, California · 17122 days ago · 7 km deep · 54 km away
  34. 1.84 km WSW of Cobb, California · 17122 days ago · 1 km deep · 1 km away
  35. 1.59 km WSW of Cobb, California · 17119 days ago · -1 km deep · 6 km away
  36. 1.73 km ESE of Calpella, California · 17119 days ago · 6 km deep · 58 km away
  37. 1.94 km WSW of Cobb, California · 17118 days ago · 1 km deep · 0 km away
  38. 3.026 km SE of Covelo, California · 17118 days ago · 12 km deep · 93 km away
  39. 3.07 km WSW of Cobb, California · 17117 days ago · 1 km deep · 3 km away
  40. 1.87 km W of Cobb, California · 17115 days ago · 3 km deep · 4 km away
  41. 2.810 km NE of Healdsburg, California · 17114 days ago · 5 km deep · 15 km away
  42. 1.611 km NE of Healdsburg, California · 17114 days ago · 4 km deep · 15 km away
  43. 2.010 km NE of Healdsburg, California · 17113 days ago · 4 km deep · 15 km away
  44. 2.010 km ENE of Clearlake Oaks, California · 17113 days ago · 6 km deep · 34 km away
  45. 2.110 km NE of Healdsburg, California · 17113 days ago · 5 km deep · 15 km away
  46. 1.811 km NE of Healdsburg, California · 17113 days ago · 5 km deep · 15 km away
  47. 1.511 km ENE of Healdsburg, California · 17113 days ago · 0 km deep · 15 km away
  48. 2.011 km NE of Healdsburg, California · 17113 days ago · 5 km deep · 15 km away
  49. 2.26 km W of Cobb, California · 17112 days ago · 3 km deep · 4 km away
  50. 1.95 km NNE of Kenwood, California · 17111 days ago · 9 km deep · 44 km away
  51. 1.88 km WSW of Cobb, California · 17107 days ago · 1 km deep · 4 km away
  52. 1.66 km WSW of Cobb, California · 17107 days ago · 1 km deep · 3 km away
  53. 1.58 km W of Cobb, California · 17106 days ago · 1 km deep · 5 km away
  54. 2.08 km W of Cobb, California · 17106 days ago · 1 km deep · 5 km away
  55. 1.57 km W of Cobb, California · 17106 days ago · 1 km deep · 4 km away
  56. 1.67 km W of Cobb, California · 17106 days ago · 1 km deep · 5 km away
  57. 1.97 km WSW of Cobb, California · 17105 days ago · 0 km deep · 3 km away
  58. 1.58 km WSW of Cobb, California · 17105 days ago · 1 km deep · 4 km away
  59. 1.98 km W of Cobb, California · 17104 days ago · 1 km deep · 5 km away
  60. 1.95 km NW of Redwood Valley, California · 17104 days ago · 7 km deep · 69 km away

The first 60 of 93.

Before

  1. 2.110 km ESE of Hidden Valley Lake, California · 17152 days ago · 6 km deep · 28 km away
  2. 2.34 km WSW of Cobb, California · 17155 days ago · 1 km deep · 0 km away
  3. 1.72 km E of Calpella, California · 17156 days ago · 8 km deep · 60 km away
  4. 1.76 km ENE of Hopland, California · 17157 days ago · 5 km deep · 31 km away
  5. 2.44 km WSW of Cobb, California · 17157 days ago · 4 km deep · 1 km away
  6. 3.09 km N of Green Valley, California · 17158 days ago · 11 km deep · 73 km away
  7. 2.89 km NE of Benicia, California · 17158 days ago · 5 km deep · 96 km away
  8. 1.67 km NNE of Geyserville, California · 17158 days ago · 9 km deep · 11 km away
  9. 1.63 km SW of Clearlake Oaks, California · 17159 days ago · -1 km deep · 23 km away
  10. 1.510 km W of Hopland, California · 17160 days ago · 6 km deep · 45 km away
  11. 1.74 km SE of Calpella, California · 17161 days ago · 4 km deep · 56 km away
  12. 1.912 km ESE of Hidden Valley Lake, California · 17161 days ago · 6 km deep · 29 km away
  13. 2.65 km ENE of Hopland, CA · 17162 days ago · 5 km deep · 33 km away
  14. 3.16 km E of Calpella, California · 17162 days ago · 5 km deep · 57 km away
  15. 1.86 km W of Cobb, California · 17162 days ago · 2 km deep · 4 km away
  16. 1.94 km SE of Calpella, California · 17164 days ago · 7 km deep · 57 km away
  17. 2.24 km SE of Calpella, California · 17164 days ago · 4 km deep · 57 km away
  18. 2.413 km NNE of Angwin, California · 17165 days ago · 11 km deep · 36 km away
  19. 2.22 km ESE of Calpella, California · 17166 days ago · 4 km deep · 59 km away
  20. 1.56 km W of Cobb, California · 17166 days ago · 3 km deep · 4 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1048419. Read Sat, Oct 3, 2026, 7:50 PM UTC.