California earthquakes

M1.9 earthquake 6 km WSW of Cobb, California

A magnitude 1.9 earthquake struck 6 km WSW of Cobb, California on Mon, Dec 20, 1982, 10:54 PM PST (06:54 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.9 2 km SE of Clearlake, 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
1.9 (md), micro
Local time
UTC
1982-12-21 06:54:31 UTC
Depth
-0.1 km (-0.1 mi), shallow
Epicenter
38.808° N, 122.801° 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, 0.3 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
74°
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: 143 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 2.92 km SE of Clearlake, California · 15981 days ago · 2 km deep · 22 km away
  2. 1.61 km SE of Clearlake, California · 15981 days ago · 3 km deep · 22 km away
  3. 1.92 km SE of Clearlake, California · 15981 days ago · 2 km deep · 23 km away
  4. 1.61 km SSE of Clearlake, California · 15981 days ago · 2 km deep · 22 km away
  5. 2.41 km SSE of Clearlake, California · 15981 days ago · 3 km deep · 22 km away
  6. 2.31 km SSE of Clearlake, California · 15981 days ago · 3 km deep · 22 km away
  7. 1.91 km SE of Clearlake, California · 15981 days ago · 3 km deep · 22 km away
  8. 2.21 km SSE of Clearlake, California · 15981 days ago · 3 km deep · 22 km away
  9. 2.59 km WSW of Cobb, California · 15981 days ago · 2 km deep · 2 km away
  10. 1.55 km SW of Cobb, California · 15981 days ago · 0 km deep · 3 km away
  11. 1.67 km W of Cobb, California · 15981 days ago · 3 km deep · 1 km away
  12. 1.917 km WNW of Elk Creek, California · 15979 days ago · 10 km deep · 93 km away
  13. 1.66 km W of Cobb, California · 15979 days ago · 3 km deep · 1 km away
  14. 1.66 km W of Cobb, California · 15979 days ago · 3 km deep · 1 km away
  15. 1.722 km ENE of Potter Valley, California · 15978 days ago · 14 km deep · 68 km away
  16. 1.79 km WSW of Cobb, California · 15977 days ago · 1 km deep · 2 km away
  17. 1.83 km NE of Talmage, California · 15977 days ago · 7 km deep · 49 km away
  18. 3.16 km WSW of Cobb, California · 15976 days ago · 3 km deep · 0 km away
  19. 1.77 km W of Cobb, California · 15976 days ago · 3 km deep · 1 km away
  20. 1.630 km NNE of Potter Valley, California · 15976 days ago · 14 km deep · 84 km away
  21. 1.511 km ESE of Hidden Valley Lake, California · 15976 days ago · 2 km deep · 32 km away
  22. 2.06 km W of Cobb, California · 15976 days ago · 2 km deep · 1 km away
  23. 1.57 km WSW of Cobb, California · 15976 days ago · -1 km deep · 2 km away
  24. 1.61 km SE of Clearlake, California · 15975 days ago · 2 km deep · 22 km away
  25. 1.97 km W of Cobb, California · 15975 days ago · 0 km deep · 2 km away
  26. 2.24 km NNW of Benicia, California · 15973 days ago · 7 km deep · 97 km away
  27. 2.26 km E of Lakeport, California · 15973 days ago · 45 km deep · 27 km away
  28. 1.85 km NE of Willits, California · 15973 days ago · 3 km deep · 83 km away
  29. 1.81 km E of Deer Park, California · 15973 days ago · 11 km deep · 43 km away
  30. 2.24 km NE of Talmage, California · 15972 days ago · 8 km deep · 49 km away
  31. 2.38 km W of Cobb, California · 15971 days ago · 1 km deep · 1 km away
  32. 1.510 km N of Brooktrails, California · 15971 days ago · 5 km deep · 96 km away
  33. 1.9Northern California · 15971 days ago · 0 km deep · 2 km away
  34. 1.65 km W of Cobb, California · 15970 days ago · 1 km deep · 2 km away
  35. 1.75 km SW of Cobb, California · 15970 days ago · 0 km deep · 3 km away
  36. 2.74 km SSW of Willits, California · 15970 days ago · 4 km deep · 80 km away
  37. 1.612 km NNW of Moskowite Corner, California · 15970 days ago · 2 km deep · 56 km away
  38. 1.63 km SE of Calpella, California · 15969 days ago · 2 km deep · 55 km away
  39. 1.77 km W of Cobb, California · 15967 days ago · 0 km deep · 1 km away
  40. 1.67 km E of Willits, California · 15967 days ago · 7 km deep · 78 km away
  41. 2.25 km ENE of Willits, California · 15967 days ago · 3 km deep · 82 km away
  42. 1.89 km N of Moskowite Corner, California · 15967 days ago · 10 km deep · 60 km away
  43. 1.713 km NNW of Moskowite Corner, California · 15966 days ago · 3 km deep · 55 km away
  44. 1.65 km WNW of Redwood Valley, California · 15966 days ago · 7 km deep · 66 km away
  45. 1.77 km NW of Moskowite Corner, California · 15966 days ago · 2 km deep · 59 km away
  46. 2.53 km NNE of Dixon, California · 15966 days ago · 30 km deep · 94 km away
  47. 1.725 km SE of Covelo, California · 15965 days ago · 14 km deep · 92 km away
  48. 1.78 km E of Willits, California · 15965 days ago · 9 km deep · 77 km away
  49. 1.94 km S of Cobb, California · 15965 days ago · 1 km deep · 7 km away
  50. 1.96 km ESE of Willits, California · 15964 days ago · 8 km deep · 77 km away
  51. 1.95 km W of Hopland, California · 15964 days ago · 6 km deep · 38 km away
  52. 1.65 km WSW of Cobb, California · 15964 days ago · -1 km deep · 2 km away
  53. 2.27 km WSW of Moskowite Corner, California · 15963 days ago · 13 km deep · 63 km away
  54. 2.05 km NE of Hopland, California · 15962 days ago · 5 km deep · 33 km away
  55. 2.14 km NNW of Redwood Valley, California · 15962 days ago · 7 km deep · 66 km away
  56. 1.87 km W of Cobb, California · 15962 days ago · 3 km deep · 1 km away
  57. 1.61 km SE of Clearlake, California · 15962 days ago · 3 km deep · 22 km away
  58. 2.05 km NE of Hopland, California · 15962 days ago · 5 km deep · 33 km away
  59. 1.84 km ENE of Willits, California · 15962 days ago · 7 km deep · 81 km away
  60. 1.812 km ESE of Hidden Valley Lake, California · 15962 days ago · 6 km deep · 32 km away

The first 60 of 143.

Before

  1. 1.74 km NE of Clearlake, California · 15982 days ago · 1 km deep · 27 km away
  2. 1.72 km SW of Clearlake, California · 15982 days ago · 1 km deep · 20 km away
  3. 2.36 km W of Cobb, California · 15983 days ago · 2 km deep · 1 km away
  4. 2.36 km W of Cobb, California · 15983 days ago · 1 km deep · 0 km away
  5. 2.14 km W of Cobb, California · 15984 days ago · 3 km deep · 2 km away
  6. 3.113 km NNW of Brooktrails, California · 15984 days ago · 7 km deep · 100 km away
  7. 1.9Northern California · 15984 days ago · -1 km deep · 3 km away
  8. 2.5near the coast of Northern California · 15985 days ago · 5 km deep · 93 km away
  9. 1.54 km ESE of Calpella, California · 15985 days ago · 0 km deep · 55 km away
  10. 1.96 km SW of Cobb, California · 15989 days ago · 0 km deep · 3 km away
  11. 1.69 km WSW of Cobb, California · 15990 days ago · 2 km deep · 2 km away
  12. 1.6Northern California · 15991 days ago · 0 km deep · 1 km away
  13. 1.55 km NNE of Cobb, California · 15991 days ago · 4 km deep · 11 km away
  14. 1.818 km NNE of Lucerne, California · 15991 days ago · 12 km deep · 48 km away
  15. 2.26 km W of Cobb, California · 15992 days ago · 1 km deep · 1 km away
  16. 1.66 km WSW of Cobb, California · 15993 days ago · 3 km deep · 0 km away
  17. 2.86 km WSW of Lower Lake, California · 15994 days ago · 3 km deep · 15 km away
  18. 1.76 km SSE of Clear Lake Riviera, California · 15994 days ago · 5 km deep · 15 km away
  19. 2.06 km W of Cobb, California · 15994 days ago · 0 km deep · 1 km away
  20. 1.67 km SSW of Cobb, California · 15994 days ago · -1 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1083293. Read Tue, Sep 22, 2026, 8:35 PM UTC.