California earthquakes

M2.7 earthquake 8 km WSW of Cobb, California

A magnitude 2.7 earthquake struck 8 km WSW of Cobb, California on Sat, Aug 22, 1981, 12:39 AM PDT (07:39 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.2 6 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
2.7 (md), micro
Local time
UTC
1981-08-22 07:39:05 UTC
Depth
2.1 km (1.3 mi), shallow
Epicenter
38.797° N, 122.820° 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
±0.08
Depth from
From location
Station coverage gap
119°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 116 in the 60 days after this one and 59 in the 30 days before it.

After

  1. 1.79 km WSW of Cobb, California · 16468 days ago · 3 km deep · 0 km away
  2. 1.59 km WSW of Cobb, California · 16468 days ago · 3 km deep · 1 km away
  3. 3.26 km W of Cobb, California · 16468 days ago · 4 km deep · 4 km away
  4. 1.810 km W of Cobb, California · 16467 days ago · -1 km deep · 3 km away
  5. 1.56 km W of Cobb, California · 16467 days ago · 1 km deep · 3 km away
  6. 1.711 km WNW of Cobb, California · 16467 days ago · 1 km deep · 6 km away
  7. 1.66 km WSW of Cobb, California · 16466 days ago · 4 km deep · 2 km away
  8. 1.66 km WSW of Cobb, California · 16466 days ago · 3 km deep · 2 km away
  9. 2.17 km WSW of Cobb, California · 16465 days ago · 0 km deep · 2 km away
  10. 1.87 km WSW of Cobb, California · 16465 days ago · 1 km deep · 2 km away
  11. 1.99 km WSW of Cobb, California · 16465 days ago · 2 km deep · 1 km away
  12. 1.723 km NE of Potter Valley, California · 16464 days ago · 10 km deep · 76 km away
  13. 1.87 km W of Cobb, California · 16463 days ago · 2 km deep · 3 km away
  14. 1.71 km NW of Larkfield-Wikiup, California · 16463 days ago · 1 km deep · 31 km away
  15. 1.89 km NW of Cobb, California · 16463 days ago · 2 km deep · 9 km away
  16. 1.719 km ENE of Potter Valley, California · 16460 days ago · 11 km deep · 68 km away
  17. 1.57 km SW of Clear Lake Riviera, California · 16458 days ago · 2 km deep · 13 km away
  18. 1.85 km NNW of Redwood Valley, California · 16458 days ago · 8 km deep · 67 km away
  19. 1.67 km NE of Hopland, California · 16458 days ago · 2 km deep · 33 km away
  20. 2.37 km WSW of Cobb, California · 16457 days ago · 2 km deep · 2 km away
  21. 1.825 km NNE of Potter Valley, California · 16457 days ago · 9 km deep · 82 km away
  22. 1.726 km NNE of Potter Valley, California · 16457 days ago · 10 km deep · 82 km away
  23. 1.711 km NNW of Potter Valley, California · 16457 days ago · 8 km deep · 75 km away
  24. 1.79 km WSW of Cobb, California · 16455 days ago · 1 km deep · 1 km away
  25. 1.75 km SW of Cobb, California · 16455 days ago · 1 km deep · 4 km away
  26. 1.67 km ESE of Willits, California · 16455 days ago · 6 km deep · 77 km away
  27. 1.71 km WNW of Redwood Valley, California · 16455 days ago · 6 km deep · 63 km away
  28. 1.65 km SSW of Clear Lake Riviera, California · 16452 days ago · 1 km deep · 14 km away
  29. 1.96 km WSW of Cobb, California · 16452 days ago · 3 km deep · 2 km away
  30. 2.06 km WSW of Cobb, California · 16451 days ago · 1 km deep · 3 km away
  31. 1.66 km WSW of Cobb, California · 16450 days ago · 0 km deep · 2 km away
  32. 1.67 km WSW of Cobb, California · 16449 days ago · 2 km deep · 2 km away
  33. 2.16 km W of Cobb, California · 16448 days ago · 4 km deep · 3 km away
  34. 1.75 km W of Cobb, California · 16446 days ago · 4 km deep · 5 km away
  35. 1.5Northern California · 16446 days ago · 1 km deep · 2 km away
  36. 1.84 km S of Cobb, California · 16444 days ago · 2 km deep · 8 km away
  37. 1.611 km S of Kelseyville, California · 16443 days ago · -1 km deep · 9 km away
  38. 1.64 km WSW of Cobb, California · 16443 days ago · 2 km deep · 4 km away
  39. 1.64 km WSW of Cobb, California · 16443 days ago · 1 km deep · 5 km away
  40. 1.7near the coast of Northern California · 16442 days ago · 6 km deep · 57 km away
  41. 2.03 km WNW of Lower Lake, California · 16441 days ago · 1 km deep · 20 km away
  42. 2.37 km WSW of Cobb, California · 16439 days ago · 4 km deep · 1 km away
  43. 2.03 km SSW of Geyserville, California · 16437 days ago · 3 km deep · 15 km away
  44. 2.10 km E of Kelseyville, California · 16437 days ago · 0 km deep · 20 km away
  45. 2.16 km W of Cobb, California · 16437 days ago · 4 km deep · 3 km away
  46. 1.714 km NNW of Moskowite Corner, California · 16437 days ago · 0 km deep · 54 km away
  47. 2.87 km NE of Healdsburg, California · 16436 days ago · 6 km deep · 15 km away
  48. 2.07 km W of Cobb, California · 16436 days ago · 2 km deep · 3 km away
  49. 1.98 km W of Cobb, California · 16435 days ago · 0 km deep · 2 km away
  50. 2.08 km W of Cobb, California · 16435 days ago · 0 km deep · 2 km away
  51. 1.77 km W of Cobb, California · 16435 days ago · 2 km deep · 2 km away
  52. 1.810 km E of Hidden Valley Lake, California · 16435 days ago · 7 km deep · 33 km away
  53. 2.67 km WSW of Cobb, California · 16434 days ago · 1 km deep · 2 km away
  54. 1.65 km SW of Cobb, California · 16434 days ago · 0 km deep · 4 km away
  55. 1.88 km E of Hopland, California · 16433 days ago · 7 km deep · 25 km away
  56. 2.14 km WSW of Cobb, California · 16432 days ago · 1 km deep · 4 km away
  57. 1.54 km WSW of Cobb, California · 16432 days ago · 1 km deep · 4 km away
  58. 2.121 km ENE of Potter Valley, California · 16432 days ago · 0 km deep · 68 km away
  59. 1.62 km E of Calpella, California · 16431 days ago · 5 km deep · 58 km away
  60. 1.720 km NNE of Upper Lake, California · 16430 days ago · 7 km deep · 60 km away

The first 60 of 116.

Before

  1. 2.49 km WSW of Cobb, California · 16469 days ago · 1 km deep · 1 km away
  2. 1.8near the coast of Northern California · 16469 days ago · 5 km deep · 57 km away
  3. 1.74 km S of Cobb, California · 16471 days ago · 1 km deep · 9 km away
  4. 2.27 km W of Cobb, California · 16472 days ago · 4 km deep · 3 km away
  5. 1.93 km NNW of Larkfield-Wikiup, California · 16472 days ago · 3 km deep · 29 km away
  6. 1.54 km WNW of Potter Valley, California · 16473 days ago · -1 km deep · 67 km away
  7. 2.17 km W of Cobb, California · 16473 days ago · 4 km deep · 2 km away
  8. 1.67 km NNW of Redwood Valley, California · 16473 days ago · 4 km deep · 69 km away
  9. 1.74 km S of Cobb, California · 16473 days ago · 1 km deep · 8 km away
  10. 2.11 km WSW of Geyserville, California · 16474 days ago · 5 km deep · 14 km away
  11. 1.69 km NE of Comptche, California · 16474 days ago · 5 km deep · 85 km away
  12. 1.76 km W of Cobb, California · 16475 days ago · 4 km deep · 3 km away
  13. 2.53 km NNW of Larkfield-Wikiup, California · 16475 days ago · 2 km deep · 29 km away
  14. 2.09 km WSW of Cobb, California · 16475 days ago · 2 km deep · 1 km away
  15. 1.54 km WNW of Potter Valley, California · 16476 days ago · 9 km deep · 67 km away
  16. 1.610 km ESE of Willits, California · 16476 days ago · 6 km deep · 75 km away
  17. 1.69 km WSW of Cobb, California · 16477 days ago · 2 km deep · 1 km away
  18. 1.69 km WSW of Cobb, California · 16477 days ago · 2 km deep · 1 km away
  19. 1.78 km W of Cobb, California · 16477 days ago · 1 km deep · 3 km away
  20. 2.67 km W of Cobb, California · 16477 days ago · 1 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1067021. Read Wed, Sep 23, 2026, 3:58 AM UTC.