California earthquakes

M2.3 earthquake 5 km SW of Cobb, California

A magnitude 2.3 earthquake struck 5 km SW of Cobb, California on Wed, Dec 30, 1981, 10:15 PM PST (06:15 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.5 16 km E of Lower Lake, 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
2.3 (md), micro
Local time
UTC
1981-12-31 06:15:16 UTC
Depth
0.1 km (0.1 mi), shallow
Epicenter
38.789° N, 122.770° 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
±0.16
Depth from
From location
Station coverage gap
37°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 151 in the 60 days after this one and 106 in the 30 days before it.

After

  1. 1.86 km WSW of Cobb, California · 16342 days ago · 1 km deep · 2 km away
  2. 1.57 km N of Brooktrails, California · 16342 days ago · 8 km deep · 96 km away
  3. 1.66 km WSW of Cobb, California · 16342 days ago · 0 km deep · 2 km away
  4. 2.16 km ENE of Willits, California · 16341 days ago · 3 km deep · 84 km away
  5. 1.87 km W of Cobb, California · 16341 days ago · 2 km deep · 5 km away
  6. 1.69 km WSW of Cobb, California · 16341 days ago · 2 km deep · 5 km away
  7. 2.07 km W of Cobb, California · 16341 days ago · 1 km deep · 4 km away
  8. 2.09 km W of Healdsburg, California · 16341 days ago · 0 km deep · 25 km away
  9. 1.56 km W of Cobb, California · 16339 days ago · 1 km deep · 4 km away
  10. 1.912 km NE of Lucerne, California · 16339 days ago · 0 km deep · 43 km away
  11. 1.67 km WSW of Cobb, California · 16338 days ago · 0 km deep · 4 km away
  12. 2.65 km WSW of Cobb, California · 16338 days ago · -1 km deep · 2 km away
  13. 2.47 km WSW of Cobb, California · 16337 days ago · 3 km deep · 4 km away
  14. 2.04 km E of Penngrove, California · 16336 days ago · 5 km deep · 56 km away
  15. 2.44 km WSW of Cobb, California · 16336 days ago · 1 km deep · 1 km away
  16. 2.54 km SW of Rutherford, California · 16336 days ago · 8 km deep · 48 km away
  17. 2.013 km NE of Angwin, California · 16336 days ago · 11 km deep · 38 km away
  18. 2.35 km E of Penngrove, California · 16336 days ago · 6 km deep · 56 km away
  19. 2.47 km W of Cobb, California · 16336 days ago · 4 km deep · 5 km away
  20. 1.87 km E of Willits, California · 16335 days ago · 7 km deep · 81 km away
  21. 2.65 km WSW of Cobb, California · 16335 days ago · 0 km deep · 3 km away
  22. 1.84 km E of Penngrove, California · 16333 days ago · 0 km deep · 56 km away
  23. 1.96 km W of Cobb, California · 16333 days ago · 3 km deep · 4 km away
  24. 1.610 km NW of Cobb, California · 16333 days ago · -1 km deep · 11 km away
  25. 2.54 km E of Penngrove, California · 16333 days ago · 6 km deep · 56 km away
  26. 1.75 km E of Penngrove, California · 16333 days ago · 5 km deep · 56 km away
  27. 2.45 km E of Penngrove, California · 16333 days ago · 6 km deep · 56 km away
  28. 1.72 km SE of Talmage, California · 16332 days ago · 5 km deep · 49 km away
  29. 3.516 km E of Lower Lake, California · 16332 days ago · 70 km deep · 34 km away
  30. 2.24 km NNW of Kelseyville, California · 16332 days ago · 63 km deep · 26 km away
  31. 1.58 km WSW of Cobb, California · 16332 days ago · 2 km deep · 4 km away
  32. 1.84 km WSW of Cobb, California · 16332 days ago · 1 km deep · 1 km away
  33. 3.16 km W of Cobb, California · 16332 days ago · 1 km deep · 4 km away
  34. 2.09 km WSW of Cobb, California · 16331 days ago · 1 km deep · 5 km away
  35. 1.717 km NNE of Upper Lake, California · 16331 days ago · 0 km deep · 58 km away
  36. 1.86 km W of Cobb, California · 16330 days ago · 3 km deep · 4 km away
  37. 1.66 km WSW of Cobb, California · 16330 days ago · 0 km deep · 2 km away
  38. 1.69 km W of Cobb, California · 16330 days ago · 1 km deep · 6 km away
  39. 1.86 km WSW of Cobb, California · 16329 days ago · 2 km deep · 3 km away
  40. 1.74 km W of Cobb, California · 16329 days ago · 0 km deep · 3 km away
  41. 2.02 km SSE of Kelseyville, California · 16329 days ago · 14 km deep · 19 km away
  42. 3.07 km W of Cobb, California · 16329 days ago · -1 km deep · 5 km away
  43. 2.78 km W of Cobb, California · 16329 days ago · -1 km deep · 6 km away
  44. 2.026 km W of Elk Creek, California · 16329 days ago · 3 km deep · 96 km away
  45. 2.63 km WNW of Clearlake Oaks, California · 16329 days ago · 4 km deep · 29 km away
  46. 1.67 km W of Cobb, California · 16329 days ago · 1 km deep · 5 km away
  47. 1.96 km W of Cobb, California · 16329 days ago · 4 km deep · 4 km away
  48. 2.04 km E of Geyserville, California · 16328 days ago · 5 km deep · 11 km away
  49. 1.86 km ESE of Roseland, California · 16328 days ago · 9 km deep · 44 km away
  50. 2.33 km ENE of Lower Lake, California · 16328 days ago · 4 km deep · 22 km away
  51. 2.95 km WNW of Philo, California · 16328 days ago · 18 km deep · 71 km away
  52. 3.04 km WSW of Cobb, California · 16327 days ago · 4 km deep · 2 km away
  53. 1.97 km WSW of Cobb, California · 16326 days ago · 2 km deep · 4 km away
  54. 1.69 km WSW of Cobb, California · 16326 days ago · 2 km deep · 5 km away
  55. 1.58 km WSW of Cobb, California · 16325 days ago · 1 km deep · 4 km away
  56. 1.66 km W of Cobb, California · 16325 days ago · 3 km deep · 4 km away
  57. 1.76 km W of Cobb, California · 16325 days ago · 3 km deep · 4 km away
  58. 1.59 km WSW of Cobb, California · 16325 days ago · 1 km deep · 5 km away
  59. 1.625 km SE of Covelo, California · 16325 days ago · 9 km deep · 96 km away
  60. 1.924 km SE of Covelo, California · 16324 days ago · 3 km deep · 96 km away

The first 60 of 151.

Before

  1. 1.77 km WSW of Cobb, California · 16343 days ago · 3 km deep · 3 km away
  2. 1.96 km ESE of Talmage, California · 16343 days ago · 8 km deep · 45 km away
  3. 2.77 km W of Cobb, California · 16343 days ago · 0 km deep · 4 km away
  4. 3.2near the coast of Northern California · 16343 days ago · 8 km deep · 96 km away
  5. 3.57 km N of Brooktrails, California · 16344 days ago · 7 km deep · 96 km away
  6. 1.87 km WSW of Cobb, California · 16344 days ago · 1 km deep · 4 km away
  7. 1.68 km WSW of Cobb, California · 16344 days ago · 2 km deep · 5 km away
  8. 1.75 km SW of Cobb, California · 16344 days ago · 0 km deep · 1 km away
  9. 1.95 km W of Cobb, California · 16344 days ago · 1 km deep · 5 km away
  10. 2.06 km WSW of Cobb, California · 16344 days ago · -1 km deep · 3 km away
  11. 1.86 km WSW of Geyserville, California · 16345 days ago · 21 km deep · 21 km away
  12. 1.95 km NNE of Clearlake, California · 16345 days ago · -1 km deep · 28 km away
  13. 1.63 km NE of Willits, California · 16345 days ago · 5 km deep · 86 km away
  14. 1.83 km WSW of Moskowite Corner, California · 16345 days ago · 12 km deep · 61 km away
  15. 1.511 km N of Brooktrails, California · 16346 days ago · 6 km deep · 100 km away
  16. 1.64 km E of Penngrove, California · 16346 days ago · 0 km deep · 57 km away
  17. 1.74 km E of Penngrove, California · 16346 days ago · 2 km deep · 56 km away
  18. 2.37 km W of Cobb, California · 16346 days ago · 0 km deep · 4 km away
  19. 1.96 km W of Cobb, California · 16346 days ago · 1 km deep · 5 km away
  20. 2.77 km WSW of Cobb, California · 16347 days ago · 0 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1070835. Read Mon, Sep 28, 2026, 7:26 PM UTC.