California earthquakes

M1.8 earthquake 6 km SW of Cobb, California

A magnitude 1.8 earthquake struck 6 km SW of Cobb, California on Wed, May 18, 1983, 12:54 PM PDT (19:54 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.6 2 km SSE of Point Arena, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-05-18 19:54:36 UTC
Depth
2.9 km (1.8 mi), shallow
Epicenter
38.783° N, 122.780° 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
±0.17
Depth from
From location
Station coverage gap
42°
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: 179 in the 60 days after this one and 63 in the 30 days before it.

After

  1. 1.67 km WSW of Cobb, California · 15841 days ago · 1 km deep · 3 km away
  2. 1.714 km WSW of Calpella, California · 15840 days ago · 2 km deep · 69 km away
  3. 2.213 km SW of Willits, California · 15840 days ago · 0 km deep · 83 km away
  4. 2.59 km WSW of Cobb, California · 15840 days ago · 1 km deep · 5 km away
  5. 1.67 km WSW of Cobb, California · 15839 days ago · 1 km deep · 4 km away
  6. 2.47 km WSW of Cobb, California · 15838 days ago · 4 km deep · 3 km away
  7. 1.67 km W of Cobb, California · 15838 days ago · 3 km deep · 5 km away
  8. 1.66 km WSW of Cobb, California · 15838 days ago · 3 km deep · 3 km away
  9. 1.65 km W of Cobb, California · 15837 days ago · 6 km deep · 4 km away
  10. 1.91 km W of American Canyon, California · 15836 days ago · 4 km deep · 81 km away
  11. 2.37 km WSW of Cobb, California · 15836 days ago · 1 km deep · 3 km away
  12. 1.67 km WSW of Cobb, California · 15835 days ago · 2 km deep · 3 km away
  13. 1.84 km SW of Calistoga, California · 15835 days ago · -1 km deep · 30 km away
  14. 2.08 km WSW of Cobb, California · 15835 days ago · 4 km deep · 4 km away
  15. 1.96 km WSW of Cobb, California · 15834 days ago · 1 km deep · 3 km away
  16. 2.07 km W of Cobb, California · 15834 days ago · 3 km deep · 4 km away
  17. 1.86 km W of Cobb, California · 15833 days ago · 4 km deep · 4 km away
  18. 2.37 km W of Cobb, California · 15833 days ago · 3 km deep · 5 km away
  19. 1.67 km W of Cobb, California · 15833 days ago · 1 km deep · 4 km away
  20. 2.16 km E of Manchester, California · 15833 days ago · 11 km deep · 75 km away
  21. 3.37 km W of Cobb, California · 15832 days ago · 3 km deep · 5 km away
  22. 1.76 km W of Cobb, California · 15832 days ago · 2 km deep · 4 km away
  23. 2.17 km WSW of Cobb, California · 15830 days ago · 4 km deep · 4 km away
  24. 1.99 km WSW of Cobb, California · 15830 days ago · 2 km deep · 5 km away
  25. 2.16 km W of Cobb, California · 15830 days ago · 3 km deep · 4 km away
  26. 1.66 km W of Cobb, California · 15829 days ago · 3 km deep · 4 km away
  27. 2.11 km WNW of Point Reyes Station, California · 15829 days ago · 10 km deep · 79 km away
  28. 2.06 km W of Cobb, California · 15828 days ago · 3 km deep · 5 km away
  29. 2.15 km SW of Cobb, California · 15827 days ago · 1 km deep · 1 km away
  30. 1.86 km NE of Hopland, California · 15827 days ago · 1 km deep · 36 km away
  31. 1.58 km WSW of Cobb, California · 15827 days ago · 3 km deep · 4 km away
  32. 1.57 km WSW of Cobb, California · 15827 days ago · 3 km deep · 4 km away
  33. 1.76 km W of Cobb, California · 15825 days ago · 4 km deep · 4 km away
  34. 1.77 km W of Cobb, California · 15825 days ago · -1 km deep · 5 km away
  35. 2.08 km WSW of Cobb, California · 15825 days ago · 3 km deep · 4 km away
  36. 1.70 km SW of Clear Lake Riviera, California · 15824 days ago · -1 km deep · 19 km away
  37. 1.94 km WSW of Moskowite Corner, California · 15824 days ago · 3 km deep · 62 km away
  38. 1.80 km SE of Clear Lake Riviera, California · 15824 days ago · -1 km deep · 19 km away
  39. 1.72 km WSW of Kenwood, California · 15824 days ago · 5 km deep · 46 km away
  40. 2.46 km ENE of Brooktrails, California · 15824 days ago · 7 km deep · 90 km away
  41. 1.83 km SE of Calpella, California · 15824 days ago · 3 km deep · 59 km away
  42. 3.07 km W of Cobb, California · 15824 days ago · 3 km deep · 4 km away
  43. 1.88 km WSW of Cobb, California · 15823 days ago · 3 km deep · 4 km away
  44. 2.16 km W of Cobb, California · 15822 days ago · 4 km deep · 5 km away
  45. 1.66 km E of Clearlake Oaks, California · 15822 days ago · -1 km deep · 30 km away
  46. 1.57 km WSW of Cobb, California · 15822 days ago · 1 km deep · 3 km away
  47. 1.78 km S of Cobb, California · 15821 days ago · 1 km deep · 7 km away
  48. 1.97 km W of Cobb, California · 15820 days ago · 3 km deep · 5 km away
  49. 2.013 km ENE of Clearlake Oaks, California · 15820 days ago · 9 km deep · 39 km away
  50. 2.225 km SE of Covelo, California · 15820 days ago · 6 km deep · 96 km away
  51. 1.78 km WSW of Cobb, California · 15819 days ago · 1 km deep · 4 km away
  52. 2.08 km WSW of Cobb, California · 15818 days ago · 0 km deep · 3 km away
  53. 1.88 km WSW of Cobb, California · 15818 days ago · 1 km deep · 4 km away
  54. 2.18 km WSW of Cobb, California · 15818 days ago · 2 km deep · 3 km away
  55. 3.47 km WSW of Cobb, California · 15818 days ago · 3 km deep · 3 km away
  56. 2.27 km W of Cobb, California · 15818 days ago · 1 km deep · 5 km away
  57. 1.67 km WSW of Cobb, California · 15818 days ago · 3 km deep · 3 km away
  58. 2.14 km W of Cobb, California · 15818 days ago · 0 km deep · 4 km away
  59. 2.37 km W of Cobb, California · 15817 days ago · 4 km deep · 5 km away
  60. 2.37 km W of Cobb, California · 15817 days ago · 4 km deep · 4 km away

The first 60 of 179.

Before

  1. 1.87 km W of Cobb, California · 15843 days ago · 3 km deep · 5 km away
  2. 1.65 km W of Cobb, California · 15843 days ago · 1 km deep · 5 km away
  3. 2.35 km SW of Cobb, California · 15843 days ago · 0 km deep · 1 km away
  4. 1.55 km SW of Cobb, California · 15844 days ago · 1 km deep · 1 km away
  5. 1.76 km WSW of Cobb, California · 15845 days ago · 2 km deep · 2 km away
  6. 1.99 km W of Calpella, California · 15846 days ago · 14 km deep · 68 km away
  7. 1.79 km E of Geyserville, California · 15848 days ago · 5 km deep · 9 km away
  8. 1.96 km SW of Cobb, California · 15848 days ago · 1 km deep · 0 km away
  9. 1.77 km W of Cobb, California · 15850 days ago · 2 km deep · 4 km away
  10. 1.826 km N of Potter Valley, California · 15851 days ago · 0 km deep · 91 km away
  11. 1.524 km SE of Covelo, California · 15851 days ago · 5 km deep · 96 km away
  12. 1.922 km NNE of Potter Valley, California · 15852 days ago · 5 km deep · 82 km away
  13. 1.77 km W of Cobb, California · 15852 days ago · 5 km deep · 5 km away
  14. 1.618 km NE of Sea Ranch, California · 15853 days ago · 9 km deep · 46 km away
  15. 1.72 km SE of Clear Lake Riviera, California · 15853 days ago · 0 km deep · 19 km away
  16. 2.28 km WSW of Cobb, California · 15853 days ago · 3 km deep · 4 km away
  17. 2.05 km W of Cobb, California · 15853 days ago · 0 km deep · 5 km away
  18. 1.62 km SE of Clear Lake Riviera, California · 15853 days ago · 1 km deep · 19 km away
  19. 1.91 km SE of Calpella, California · 15854 days ago · 3 km deep · 60 km away
  20. 1.67 km WSW of Cobb, California · 15855 days ago · 3 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1094863. Read Thu, Oct 1, 2026, 6:08 PM UTC.