California earthquakes

M1.9 earthquake 6 km W of Cobb, California

A magnitude 1.9 earthquake struck 6 km W of Cobb, California on Mon, Apr 4, 1983, 10:51 AM PST (18:51 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.6 3 km E of Talmage, 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
1.9 (md), micro
Local time
UTC
1983-04-04 18:51:01 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
38.814° N, 122.798° 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, 0.3 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
73°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 133 in the 60 days after this one and 78 in the 30 days before it.

After

  1. 1.59 km WSW of Cobb, California · 15884 days ago · 3 km deep · 3 km away
  2. 1.64 km W of Cobb, California · 15883 days ago · 0 km deep · 2 km away
  3. 1.77 km W of Cobb, California · 15882 days ago · 3 km deep · 1 km away
  4. 1.57 km W of Cobb, California · 15882 days ago · 3 km deep · 1 km away
  5. 1.86 km W of Cobb, California · 15882 days ago · 3 km deep · 1 km away
  6. 2.31 km ESE of Geyserville, California · 15882 days ago · 5 km deep · 14 km away
  7. 2.26 km NE of Black Point-Green Point, California · 15882 days ago · 2 km deep · 79 km away
  8. 1.77 km W of Cobb, California · 15881 days ago · 1 km deep · 2 km away
  9. 2.05 km SW of Cobb, California · 15881 days ago · 0 km deep · 4 km away
  10. 3.63 km E of Talmage, California · 15881 days ago · 7 km deep · 46 km away
  11. 1.92 km ENE of Talmage, California · 15881 days ago · 4 km deep · 47 km away
  12. 1.66 km W of Cobb, California · 15881 days ago · 3 km deep · 0 km away
  13. 2.427 km N of Potter Valley, California · 15881 days ago · 3 km deep · 87 km away
  14. 2.56 km W of Cobb, California · 15880 days ago · 3 km deep · 0 km away
  15. 2.25 km W of Cobb, California · 15878 days ago · -1 km deep · 2 km away
  16. 2.16 km W of Cobb, California · 15878 days ago · 3 km deep · 1 km away
  17. 1.68 km WSW of Cobb, California · 15877 days ago · 3 km deep · 2 km away
  18. 2.27 km W of Cobb, California · 15877 days ago · 0 km deep · 1 km away
  19. 2.46 km W of Cobb, California · 15877 days ago · 3 km deep · 0 km away
  20. 2.06 km W of Cobb, California · 15876 days ago · 3 km deep · 1 km away
  21. 2.56 km W of Cobb, California · 15876 days ago · 2 km deep · 0 km away
  22. 1.93 km NNE of Willows, California · 15875 days ago · 19 km deep · 98 km away
  23. 2.75 km SW of Cobb, California · 15875 days ago · 0 km deep · 4 km away
  24. 1.97 km W of Cobb, California · 15875 days ago · 3 km deep · 1 km away
  25. 1.68 km NNE of Larkfield-Wikiup, California · 15874 days ago · 4 km deep · 28 km away
  26. 1.611 km NNE of Brooktrails, California · 15874 days ago · 11 km deep · 94 km away
  27. 2.26 km SW of Cobb, California · 15874 days ago · 1 km deep · 4 km away
  28. 3.27 km WSW of Cobb, California · 15874 days ago · 3 km deep · 1 km away
  29. 3.07 km W of Cobb, California · 15874 days ago · 2 km deep · 1 km away
  30. 2.28 km WSW of Cobb, California · 15873 days ago · 1 km deep · 3 km away
  31. 1.95 km SW of Cobb, California · 15873 days ago · 0 km deep · 3 km away
  32. 2.77 km WSW of Cobb, California · 15873 days ago · 2 km deep · 1 km away
  33. 1.69 km W of Cobb, California · 15873 days ago · 1 km deep · 3 km away
  34. 1.67 km WSW of Cobb, California · 15872 days ago · 1 km deep · 1 km away
  35. 1.67 km WSW of Cobb, California · 15871 days ago · 1 km deep · 1 km away
  36. 1.922 km NE of Potter Valley, California · 15871 days ago · 6 km deep · 74 km away
  37. 1.97 km WSW of Cobb, California · 15870 days ago · 0 km deep · 2 km away
  38. 3.56 km W of Cobb, California · 15869 days ago · 3 km deep · 1 km away
  39. 1.85 km SW of Kenwood, California · 15869 days ago · 11 km deep · 52 km away
  40. 1.56 km W of Cobb, California · 15869 days ago · 3 km deep · 0 km away
  41. 1.94 km S of Cobb, California · 15869 days ago · 1 km deep · 7 km away
  42. 3.47 km WSW of Cobb, California · 15869 days ago · 4 km deep · 2 km away
  43. 1.57 km WSW of Cobb, California · 15869 days ago · 3 km deep · 1 km away
  44. 1.58 km WSW of Cobb, California · 15868 days ago · 6 km deep · 3 km away
  45. 1.95 km SSW of Cobb, California · 15867 days ago · -1 km deep · 7 km away
  46. 2.012 km ENE of Hidden Valley Lake, California · 15867 days ago · 6 km deep · 33 km away
  47. 3.118 km E of Potter Valley, California · 15867 days ago · 10 km deep · 59 km away
  48. 1.818 km E of Potter Valley, California · 15867 days ago · 8 km deep · 60 km away
  49. 1.65 km SW of Cobb, California · 15867 days ago · 0 km deep · 3 km away
  50. 2.14 km SW of Cobb, California · 15867 days ago · -1 km deep · 4 km away
  51. 2.04 km SSE of Clear Lake Riviera, California · 15866 days ago · 3 km deep · 14 km away
  52. 1.86 km W of Kenwood, California · 15866 days ago · 8 km deep · 48 km away
  53. 1.55 km ENE of Willits, California · 15866 days ago · 3 km deep · 82 km away
  54. 1.69 km ESE of Hidden Valley Lake, California · 15866 days ago · 4 km deep · 30 km away
  55. 1.84 km S of Cobb, California · 15865 days ago · 1 km deep · 7 km away
  56. 1.94 km S of Cobb, California · 15865 days ago · 2 km deep · 8 km away
  57. 2.56 km WSW of Cobb, California · 15865 days ago · 0 km deep · 2 km away
  58. 1.96 km WSW of Cobb, California · 15864 days ago · 1 km deep · 1 km away
  59. 1.6near the coast of Northern California · 15864 days ago · 3 km deep · 56 km away
  60. 1.77 km WSW of Cobb, California · 15864 days ago · 3 km deep · 1 km away

The first 60 of 133.

Before

  1. 1.87 km WSW of Cobb, California · 15884 days ago · 2 km deep · 1 km away
  2. 2.47 km W of Cobb, California · 15884 days ago · 3 km deep · 1 km away
  3. 2.97 km NW of Redwood Valley, California · 15884 days ago · 0 km deep · 68 km away
  4. 1.92 km ESE of Geyserville, California · 15884 days ago · 6 km deep · 15 km away
  5. 1.57 km W of Cobb, California · 15885 days ago · -1 km deep · 1 km away
  6. 1.66 km W of Cobb, California · 15885 days ago · 1 km deep · 0 km away
  7. 1.97 km W of Cobb, California · 15886 days ago · 3 km deep · 1 km away
  8. 2.110 km N of Benicia, California · 15887 days ago · 12 km deep · 94 km away
  9. 1.819 km SW of Cloverdale, California · 15890 days ago · -1 km deep · 36 km away
  10. 2.68 km ESE of Yountville, California · 15890 days ago · 17 km deep · 67 km away
  11. 2.13 km N of Healdsburg, California · 15891 days ago · 1 km deep · 20 km away
  12. 1.67 km WSW of Cobb, California · 15891 days ago · 1 km deep · 2 km away
  13. 2.42 km SSE of Comptche, California · 15891 days ago · 10 km deep · 83 km away
  14. 1.57 km W of Cobb, California · 15892 days ago · 3 km deep · 1 km away
  15. 2.07 km W of Cobb, California · 15892 days ago · 3 km deep · 1 km away
  16. 1.67 km WSW of Cobb, California · 15892 days ago · 2 km deep · 1 km away
  17. 2.18 km WSW of Cobb, California · 15892 days ago · 7 km deep · 3 km away
  18. 1.66 km WSW of Cobb, California · 15892 days ago · 1 km deep · 2 km away
  19. 1.56 km W of Cobb, California · 15894 days ago · 1 km deep · 0 km away
  20. 1.75 km E of Calpella, California · 15894 days ago · 2 km deep · 55 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1089949. Read Tue, Sep 29, 2026, 12:44 PM UTC.