California earthquakes

M2.3 earthquake 7 km WSW of Cobb, California

A magnitude 2.3 earthquake struck 7 km WSW of Cobb, California on Tue, Sep 1, 1981, 10:32 AM PDT (17:32 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.5 15 km N of Brooktrails, 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
1981-09-01 17:32:06 UTC
Depth
1.6 km (1.0 mi), shallow
Epicenter
38.808° N, 122.808° 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
±0.10
Depth from
From location
Station coverage gap
38°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 117 in the 60 days after this one and 55 in the 30 days before it.

After

  1. 1.825 km NNE of Potter Valley, California · 16463 days ago · 9 km deep · 81 km away
  2. 1.726 km NNE of Potter Valley, California · 16463 days ago · 10 km deep · 81 km away
  3. 1.711 km NNW of Potter Valley, California · 16463 days ago · 8 km deep · 74 km away
  4. 1.79 km WSW of Cobb, California · 16461 days ago · 1 km deep · 2 km away
  5. 1.75 km SW of Cobb, California · 16461 days ago · 1 km deep · 4 km away
  6. 1.67 km ESE of Willits, California · 16461 days ago · 6 km deep · 76 km away
  7. 1.71 km WNW of Redwood Valley, California · 16461 days ago · 6 km deep · 63 km away
  8. 1.65 km SSW of Clear Lake Riviera, California · 16458 days ago · 1 km deep · 12 km away
  9. 1.96 km WSW of Cobb, California · 16458 days ago · 3 km deep · 1 km away
  10. 2.06 km WSW of Cobb, California · 16457 days ago · 1 km deep · 1 km away
  11. 1.66 km WSW of Cobb, California · 16456 days ago · 0 km deep · 1 km away
  12. 1.67 km WSW of Cobb, California · 16455 days ago · 2 km deep · 1 km away
  13. 2.16 km W of Cobb, California · 16454 days ago · 4 km deep · 1 km away
  14. 1.75 km W of Cobb, California · 16452 days ago · 4 km deep · 3 km away
  15. 1.5Northern California · 16452 days ago · 1 km deep · 2 km away
  16. 1.84 km S of Cobb, California · 16450 days ago · 2 km deep · 8 km away
  17. 1.611 km S of Kelseyville, California · 16450 days ago · -1 km deep · 8 km away
  18. 1.64 km WSW of Cobb, California · 16449 days ago · 2 km deep · 3 km away
  19. 1.64 km WSW of Cobb, California · 16449 days ago · 1 km deep · 4 km away
  20. 1.7near the coast of Northern California · 16448 days ago · 6 km deep · 56 km away
  21. 2.03 km WNW of Lower Lake, California · 16447 days ago · 1 km deep · 19 km away
  22. 2.37 km WSW of Cobb, California · 16445 days ago · 4 km deep · 1 km away
  23. 2.03 km SSW of Geyserville, California · 16444 days ago · 3 km deep · 17 km away
  24. 2.10 km E of Kelseyville, California · 16443 days ago · 0 km deep · 19 km away
  25. 2.16 km W of Cobb, California · 16443 days ago · 4 km deep · 1 km away
  26. 1.714 km NNW of Moskowite Corner, California · 16443 days ago · 0 km deep · 54 km away
  27. 2.87 km NE of Healdsburg, California · 16442 days ago · 6 km deep · 16 km away
  28. 2.07 km W of Cobb, California · 16442 days ago · 2 km deep · 1 km away
  29. 1.98 km W of Cobb, California · 16441 days ago · 0 km deep · 1 km away
  30. 2.08 km W of Cobb, California · 16441 days ago · 0 km deep · 2 km away
  31. 1.77 km W of Cobb, California · 16441 days ago · 2 km deep · 1 km away
  32. 1.810 km E of Hidden Valley Lake, California · 16441 days ago · 7 km deep · 32 km away
  33. 2.67 km WSW of Cobb, California · 16440 days ago · 1 km deep · 0 km away
  34. 1.65 km SW of Cobb, California · 16440 days ago · 0 km deep · 4 km away
  35. 1.88 km E of Hopland, California · 16439 days ago · 7 km deep · 25 km away
  36. 2.14 km WSW of Cobb, California · 16438 days ago · 1 km deep · 3 km away
  37. 1.54 km WSW of Cobb, California · 16438 days ago · 1 km deep · 3 km away
  38. 2.121 km ENE of Potter Valley, California · 16438 days ago · 0 km deep · 67 km away
  39. 1.62 km E of Calpella, California · 16437 days ago · 5 km deep · 57 km away
  40. 1.720 km NNE of Upper Lake, California · 16437 days ago · 7 km deep · 59 km away
  41. 1.66 km WSW of Cobb, California · 16437 days ago · 2 km deep · 1 km away
  42. 1.86 km NE of Hopland, California · 16435 days ago · 1 km deep · 32 km away
  43. 2.77 km NE of Healdsburg, California · 16435 days ago · 5 km deep · 16 km away
  44. 1.77 km NE of Healdsburg, California · 16435 days ago · 5 km deep · 16 km away
  45. 1.77 km W of Cobb, California · 16434 days ago · 0 km deep · 2 km away
  46. 1.68 km W of Cobb, California · 16434 days ago · 0 km deep · 1 km away
  47. 1.67 km WSW of Cobb, California · 16433 days ago · 4 km deep · 2 km away
  48. 1.89 km WSW of Cobb, California · 16432 days ago · 1 km deep · 2 km away
  49. 1.73 km SSW of Oakville, California · 16432 days ago · 6 km deep · 56 km away
  50. 1.98 km W of Cobb, California · 16432 days ago · -1 km deep · 1 km away
  51. 1.78 km NE of Hopland, California · 16432 days ago · 5 km deep · 32 km away
  52. 2.87 km WSW of Cobb, California · 16432 days ago · 2 km deep · 0 km away
  53. 1.97 km WSW of Cobb, California · 16431 days ago · 1 km deep · 1 km away
  54. 2.111 km ESE of Boonville, California · 16431 days ago · 6 km deep · 42 km away
  55. 1.66 km WSW of Cobb, California · 16431 days ago · 0 km deep · 1 km away
  56. 2.35 km WSW of Cobb, California · 16430 days ago · 1 km deep · 2 km away
  57. 1.82 km NNW of Ukiah, California · 16430 days ago · 0 km deep · 53 km away
  58. 2.17 km W of Cobb, California · 16428 days ago · 0 km deep · 3 km away
  59. 2.06 km W of Cobb, California · 16428 days ago · 4 km deep · 2 km away
  60. 1.65 km SW of Cobb, California · 16428 days ago · 0 km deep · 4 km away

The first 60 of 117.

Before

  1. 1.67 km NE of Hopland, California · 16464 days ago · 2 km deep · 33 km away
  2. 1.85 km NNW of Redwood Valley, California · 16464 days ago · 8 km deep · 67 km away
  3. 1.57 km SW of Clear Lake Riviera, California · 16464 days ago · 2 km deep · 11 km away
  4. 1.719 km ENE of Potter Valley, California · 16466 days ago · 11 km deep · 67 km away
  5. 1.89 km NW of Cobb, California · 16469 days ago · 2 km deep · 8 km away
  6. 1.71 km NW of Larkfield-Wikiup, California · 16470 days ago · 1 km deep · 32 km away
  7. 1.87 km W of Cobb, California · 16470 days ago · 2 km deep · 1 km away
  8. 1.723 km NE of Potter Valley, California · 16470 days ago · 10 km deep · 75 km away
  9. 1.99 km WSW of Cobb, California · 16471 days ago · 2 km deep · 2 km away
  10. 1.87 km WSW of Cobb, California · 16471 days ago · 1 km deep · 1 km away
  11. 2.17 km WSW of Cobb, California · 16471 days ago · 0 km deep · 2 km away
  12. 1.66 km WSW of Cobb, California · 16472 days ago · 3 km deep · 1 km away
  13. 1.66 km WSW of Cobb, California · 16472 days ago · 4 km deep · 1 km away
  14. 1.711 km WNW of Cobb, California · 16473 days ago · 1 km deep · 5 km away
  15. 1.56 km W of Cobb, California · 16473 days ago · 1 km deep · 1 km away
  16. 1.810 km W of Cobb, California · 16473 days ago · -1 km deep · 3 km away
  17. 3.26 km W of Cobb, California · 16474 days ago · 4 km deep · 2 km away
  18. 1.59 km WSW of Cobb, California · 16474 days ago · 3 km deep · 2 km away
  19. 1.79 km WSW of Cobb, California · 16474 days ago · 3 km deep · 2 km away
  20. 2.78 km WSW of Cobb, California · 16474 days ago · 2 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1067286. Read Tue, Sep 29, 2026, 8:31 AM UTC.