California earthquakes

M1.5 earthquake 7 km WSW of Cobb, California

A magnitude 1.5 earthquake struck 7 km WSW of Cobb, California on Thu, Dec 17, 1981, 11:56 PM PST (07:56 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.1 4 km E of Penngrove, 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
1.5 (md), micro
Local time
UTC
1981-12-18 07:56:04 UTC
Depth
-0.1 km (-0.0 mi), shallow
Epicenter
38.795° 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, 0.4 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
48°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 174 in the 60 days after this one and 18 in the 30 days before it.

After

  1. 3.14 km E of Penngrove, California · 16349 days ago · 8 km deep · 57 km away
  2. 2.15 km E of Penngrove, California · 16349 days ago · 6 km deep · 58 km away
  3. 1.66 km W of Cobb, California · 16349 days ago · 2 km deep · 2 km away
  4. 1.66 km W of Cobb, California · 16349 days ago · 2 km deep · 2 km away
  5. 2.29 km WSW of Cobb, California · 16348 days ago · 2 km deep · 3 km away
  6. 1.57 km W of Cobb, California · 16348 days ago · 1 km deep · 2 km away
  7. 1.55 km ESE of Roseland, California · 16348 days ago · 10 km deep · 45 km away
  8. 2.64 km E of Penngrove, California · 16347 days ago · 4 km deep · 57 km away
  9. 3.04 km E of Penngrove, California · 16347 days ago · 9 km deep · 57 km away
  10. 2.44 km E of Penngrove, California · 16347 days ago · 5 km deep · 57 km away
  11. 3.14 km E of Penngrove, California · 16347 days ago · 8 km deep · 57 km away
  12. 1.620 km NE of Potter Valley, California · 16347 days ago · 4 km deep · 75 km away
  13. 1.720 km NE of Potter Valley, California · 16347 days ago · 7 km deep · 75 km away
  14. 3.25 km E of Penngrove, California · 16347 days ago · 7 km deep · 57 km away
  15. 1.65 km E of Penngrove, California · 16347 days ago · 2 km deep · 58 km away
  16. 1.87 km W of Cobb, California · 16347 days ago · 3 km deep · 2 km away
  17. 2.54 km ESE of Penngrove, California · 16347 days ago · 0 km deep · 58 km away
  18. 1.94 km E of Penngrove, California · 16347 days ago · 0 km deep · 58 km away
  19. 1.94 km E of Penngrove, California · 16347 days ago · 0 km deep · 58 km away
  20. 1.85 km E of Penngrove, California · 16346 days ago · 1 km deep · 57 km away
  21. 1.8Northern California · 16346 days ago · 4 km deep · 10 km away
  22. 1.5Northern California · 16346 days ago · 1 km deep · 3 km away
  23. 2.0Northern California · 16346 days ago · 3 km deep · 2 km away
  24. 1.95 km WSW of Cobb, California · 16345 days ago · 1 km deep · 2 km away
  25. 1.64 km E of Penngrove, California · 16343 days ago · 0 km deep · 57 km away
  26. 1.65 km E of Penngrove, California · 16343 days ago · 2 km deep · 57 km away
  27. 1.59 km SW of Calistoga, California · 16343 days ago · 4 km deep · 34 km away
  28. 1.77 km S of Comptche, California · 16343 days ago · 4 km deep · 83 km away
  29. 1.83 km ENE of Clear Lake Riviera, California · 16343 days ago · 2 km deep · 21 km away
  30. 2.97 km WSW of Cobb, California · 16343 days ago · 1 km deep · 1 km away
  31. 2.28 km NW of Redwood Valley, California · 16342 days ago · 3 km deep · 71 km away
  32. 1.96 km W of Cobb, California · 16342 days ago · 3 km deep · 2 km away
  33. 2.84 km NE of Hopland, California · 16341 days ago · 6 km deep · 33 km away
  34. 2.59 km WSW of Cobb, California · 16341 days ago · 2 km deep · 3 km away
  35. 2.77 km WSW of Cobb, California · 16341 days ago · 0 km deep · 1 km away
  36. 1.96 km W of Cobb, California · 16340 days ago · 1 km deep · 4 km away
  37. 2.37 km W of Cobb, California · 16340 days ago · 0 km deep · 2 km away
  38. 1.74 km E of Penngrove, California · 16340 days ago · 2 km deep · 58 km away
  39. 1.64 km E of Penngrove, California · 16340 days ago · 0 km deep · 58 km away
  40. 1.511 km N of Brooktrails, California · 16340 days ago · 6 km deep · 98 km away
  41. 1.83 km WSW of Moskowite Corner, California · 16339 days ago · 12 km deep · 64 km away
  42. 1.63 km NE of Willits, California · 16339 days ago · 5 km deep · 84 km away
  43. 1.95 km NNE of Clearlake, California · 16339 days ago · -1 km deep · 29 km away
  44. 1.86 km WSW of Geyserville, California · 16338 days ago · 21 km deep · 20 km away
  45. 2.06 km WSW of Cobb, California · 16338 days ago · -1 km deep · 0 km away
  46. 1.95 km W of Cobb, California · 16338 days ago · 1 km deep · 4 km away
  47. 1.75 km SW of Cobb, California · 16338 days ago · 0 km deep · 2 km away
  48. 1.68 km WSW of Cobb, California · 16338 days ago · 2 km deep · 2 km away
  49. 1.87 km WSW of Cobb, California · 16338 days ago · 1 km deep · 1 km away
  50. 3.57 km N of Brooktrails, California · 16338 days ago · 7 km deep · 94 km away
  51. 3.2near the coast of Northern California · 16337 days ago · 8 km deep · 94 km away
  52. 2.77 km W of Cobb, California · 16337 days ago · 0 km deep · 2 km away
  53. 1.96 km ESE of Talmage, California · 16337 days ago · 8 km deep · 43 km away
  54. 1.77 km WSW of Cobb, California · 16336 days ago · 3 km deep · 1 km away
  55. 2.35 km SW of Cobb, California · 16336 days ago · 0 km deep · 2 km away
  56. 1.86 km WSW of Cobb, California · 16336 days ago · 1 km deep · 0 km away
  57. 1.57 km N of Brooktrails, California · 16336 days ago · 8 km deep · 94 km away
  58. 1.66 km WSW of Cobb, California · 16335 days ago · 0 km deep · 1 km away
  59. 2.16 km ENE of Willits, California · 16335 days ago · 3 km deep · 83 km away
  60. 1.87 km W of Cobb, California · 16335 days ago · 2 km deep · 3 km away

The first 60 of 174.

Before

  1. 2.66 km W of Cobb, California · 16349 days ago · 4 km deep · 2 km away
  2. 1.89 km WSW of Cobb, California · 16350 days ago · 0 km deep · 2 km away
  3. 1.97 km WSW of Cobb, California · 16351 days ago · 1 km deep · 1 km away
  4. 1.87 km WSW of Cobb, California · 16351 days ago · 2 km deep · 1 km away
  5. 2.512 km WNW of Stonyford, California · 16352 days ago · 9 km deep · 72 km away
  6. 2.512 km NW of Stonyford, California · 16352 days ago · 9 km deep · 72 km away
  7. 1.63 km NNW of Clearlake, California · 16353 days ago · 73 km deep · 25 km away
  8. 1.76 km W of Cobb, California · 16353 days ago · 1 km deep · 4 km away
  9. 1.710 km ENE of Hidden Valley Lake, California · 16353 days ago · 4 km deep · 31 km away
  10. 2.45 km E of Penngrove, California · 16354 days ago · 8 km deep · 57 km away
  11. 1.57 km WSW of Cobb, California · 16354 days ago · 1 km deep · 1 km away
  12. 1.64 km WSW of Cobb, California · 16355 days ago · 1 km deep · 2 km away
  13. 1.6Northern California · 16355 days ago · 0 km deep · 2 km away
  14. 1.88 km E of Willits, California · 16356 days ago · 8 km deep · 78 km away
  15. 1.66 km W of Cobb, California · 16356 days ago · 1 km deep · 2 km away
  16. 1.79 km WSW of Cobb, California · 16357 days ago · 2 km deep · 3 km away
  17. 2.17 km NNE of Hidden Valley Lake, California · 16357 days ago · 7 km deep · 24 km away
  18. 1.78 km W of Cobb, California · 16357 days ago · 1 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1070418. Read Tue, Sep 22, 2026, 3:25 PM UTC.