California earthquakes

M1.8 earthquake 9 km WSW of Cobb, California

A magnitude 1.8 earthquake struck 9 km WSW of Cobb, California on Fri, Oct 2, 1981, 8:51 PM PDT (03:51 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M1.9 8 km W of Cobb, 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), micro
Local time
UTC
1981-10-03 03:51:55 UTC
Depth
1.0 km (0.6 mi), shallow
Epicenter
38.801° N, 122.826° 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 0.5 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
82°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 122 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 1.73 km SSW of Oakville, California · 16426 days ago · 6 km deep · 56 km away
  2. 1.98 km W of Cobb, California · 16425 days ago · -1 km deep · 1 km away
  3. 1.78 km NE of Hopland, California · 16425 days ago · 5 km deep · 32 km away
  4. 2.87 km WSW of Cobb, California · 16425 days ago · 2 km deep · 2 km away
  5. 1.97 km WSW of Cobb, California · 16425 days ago · 1 km deep · 2 km away
  6. 2.111 km ESE of Boonville, California · 16425 days ago · 6 km deep · 41 km away
  7. 1.66 km WSW of Cobb, California · 16424 days ago · 0 km deep · 3 km away
  8. 2.35 km WSW of Cobb, California · 16424 days ago · 1 km deep · 3 km away
  9. 1.82 km NNW of Ukiah, California · 16423 days ago · 0 km deep · 53 km away
  10. 2.17 km W of Cobb, California · 16422 days ago · 0 km deep · 4 km away
  11. 2.06 km W of Cobb, California · 16421 days ago · 4 km deep · 3 km away
  12. 1.65 km SW of Cobb, California · 16421 days ago · 0 km deep · 5 km away
  13. 2.15 km SW of Cobb, California · 16421 days ago · 0 km deep · 5 km away
  14. 1.65 km WSW of Hopland, California · 16421 days ago · 5 km deep · 34 km away
  15. 1.66 km W of Cobb, California · 16421 days ago · 2 km deep · 3 km away
  16. 1.65 km WSW of Cobb, California · 16420 days ago · 0 km deep · 4 km away
  17. 2.27 km WSW of Cobb, California · 16420 days ago · 0 km deep · 2 km away
  18. 1.66 km W of Cobb, California · 16420 days ago · 1 km deep · 3 km away
  19. 1.85 km W of Cobb, California · 16419 days ago · 0 km deep · 4 km away
  20. 3.15 km W of Cobb, California · 16419 days ago · 1 km deep · 4 km away
  21. 2.46 km W of Cobb, California · 16419 days ago · 1 km deep · 4 km away
  22. 3.111 km NE of Hidden Valley Lake, California · 16419 days ago · 11 km deep · 33 km away
  23. 2.09 km ENE of Hidden Valley Lake, California · 16419 days ago · 8 km deep · 32 km away
  24. 1.84 km WSW of Kenwood, California · 16419 days ago · 8 km deep · 49 km away
  25. 1.79 km W of Cobb, California · 16418 days ago · 1 km deep · 1 km away
  26. 1.65 km WSW of Cobb, California · 16418 days ago · 0 km deep · 3 km away
  27. 1.89 km ENE of Hidden Valley Lake, California · 16418 days ago · 7 km deep · 32 km away
  28. 2.84 km E of Geyserville, California · 16417 days ago · 5 km deep · 10 km away
  29. 2.08 km W of Cobb, California · 16417 days ago · 0 km deep · 1 km away
  30. 1.69 km WSW of Cobb, California · 16417 days ago · 3 km deep · 0 km away
  31. 1.84 km E of Geyserville, California · 16417 days ago · 4 km deep · 11 km away
  32. 3.1Northern California · 16417 days ago · 1 km deep · 3 km away
  33. 1.618 km NE of Upper Lake, California · 16417 days ago · 5 km deep · 56 km away
  34. 1.717 km N of Moskowite Corner, California · 16416 days ago · 8 km deep · 58 km away
  35. 2.014 km N of Moskowite Corner, California · 16416 days ago · 0 km deep · 62 km away
  36. 1.94 km WSW of Cobb, California · 16416 days ago · 1 km deep · 5 km away
  37. 1.59 km WSW of Cobb, California · 16416 days ago · 1 km deep · 1 km away
  38. 1.58 km NNE of Cloverdale, California · 16416 days ago · 3 km deep · 16 km away
  39. 1.67 km W of Cobb, California · 16415 days ago · 1 km deep · 2 km away
  40. 1.74 km E of Geyserville, California · 16414 days ago · 5 km deep · 11 km away
  41. 1.69 km WSW of Cobb, California · 16414 days ago · 1 km deep · 0 km away
  42. 1.84 km SSE of Dillon Beach, California · 16414 days ago · 2 km deep · 66 km away
  43. 1.62 km E of Larkfield-Wikiup, California · 16414 days ago · 8 km deep · 34 km away
  44. 1.84 km E of Geyserville, California · 16413 days ago · 3 km deep · 11 km away
  45. 1.55 km SSW of Cobb, California · 16413 days ago · -1 km deep · 8 km away
  46. 1.89 km WSW of Cobb, California · 16411 days ago · 1 km deep · 0 km away
  47. 1.57 km WSW of Cobb, California · 16411 days ago · 2 km deep · 2 km away
  48. 2.35 km SW of Cobb, California · 16410 days ago · 0 km deep · 5 km away
  49. 1.68 km ENE of Brooktrails, California · 16407 days ago · 8 km deep · 87 km away
  50. 3.515 km N of Brooktrails, California · 16406 days ago · 9 km deep · 98 km away
  51. 2.29 km WSW of Cobb, California · 16405 days ago · 0 km deep · 0 km away
  52. 1.77 km WSW of Cobb, California · 16401 days ago · 1 km deep · 2 km away
  53. 1.65 km SSW of Cobb, California · 16401 days ago · 0 km deep · 8 km away
  54. 1.66 km W of Cobb, California · 16400 days ago · 4 km deep · 3 km away
  55. 1.818 km N of Moskowite Corner, California · 16400 days ago · 8 km deep · 58 km away
  56. 1.56 km WNW of Cobb, California · 16399 days ago · 1 km deep · 5 km away
  57. 2.417 km N of Moskowite Corner, California · 16399 days ago · 9 km deep · 58 km away
  58. 2.518 km N of Moskowite Corner, California · 16399 days ago · 8 km deep · 57 km away
  59. 1.59 km WSW of Cobb, California · 16399 days ago · 1 km deep · 1 km away
  60. 2.07 km W of Cobb, California · 16399 days ago · 1 km deep · 3 km away

The first 60 of 122.

Before

  1. 1.67 km WSW of Cobb, California · 16426 days ago · 4 km deep · 2 km away
  2. 1.68 km W of Cobb, California · 16427 days ago · 0 km deep · 1 km away
  3. 1.77 km W of Cobb, California · 16428 days ago · 0 km deep · 3 km away
  4. 1.77 km NE of Healdsburg, California · 16428 days ago · 5 km deep · 16 km away
  5. 2.77 km NE of Healdsburg, California · 16428 days ago · 5 km deep · 15 km away
  6. 1.86 km NE of Hopland, California · 16429 days ago · 1 km deep · 32 km away
  7. 1.66 km WSW of Cobb, California · 16430 days ago · 2 km deep · 3 km away
  8. 1.720 km NNE of Upper Lake, California · 16430 days ago · 7 km deep · 60 km away
  9. 1.62 km E of Calpella, California · 16431 days ago · 5 km deep · 57 km away
  10. 2.121 km ENE of Potter Valley, California · 16432 days ago · 0 km deep · 67 km away
  11. 1.54 km WSW of Cobb, California · 16432 days ago · 1 km deep · 5 km away
  12. 2.14 km WSW of Cobb, California · 16432 days ago · 1 km deep · 5 km away
  13. 1.88 km E of Hopland, California · 16433 days ago · 7 km deep · 25 km away
  14. 1.65 km SW of Cobb, California · 16433 days ago · 0 km deep · 5 km away
  15. 2.67 km WSW of Cobb, California · 16434 days ago · 1 km deep · 2 km away
  16. 1.810 km E of Hidden Valley Lake, California · 16434 days ago · 7 km deep · 34 km away
  17. 1.77 km W of Cobb, California · 16434 days ago · 2 km deep · 2 km away
  18. 2.08 km W of Cobb, California · 16434 days ago · 0 km deep · 2 km away
  19. 1.98 km W of Cobb, California · 16434 days ago · 0 km deep · 2 km away
  20. 2.07 km W of Cobb, California · 16435 days ago · 2 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1068227. Read Tue, Sep 22, 2026, 5:23 PM UTC.