California earthquakes

M1.6 earthquake 6 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 6 km WSW of Cobb, California on Mon, Jul 27, 1981, 4:56 PM PDT (23:56 UTC), 0 km (0 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
1.6 (md), micro
Local time
UTC
1981-07-27 23:56:27 UTC
Depth
0.2 km (0.1 mi), shallow
Epicenter
38.793° N, 122.784° 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
±0.15
Depth from
From location
Station coverage gap
41°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 107 in the 60 days after this one and 56 in the 30 days before it.

After

  1. 1.96 km WSW of Cobb, California · 16499 days ago · 3 km deep · 2 km away
  2. 3.06 km WSW of Cobb, California · 16499 days ago · 4 km deep · 2 km away
  3. 1.86 km WSW of Cobb, California · 16499 days ago · 0 km deep · 1 km away
  4. 2.45 km WSW of Cobb, California · 16499 days ago · 1 km deep · 1 km away
  5. 1.56 km WSW of Cobb, California · 16499 days ago · 0 km deep · 1 km away
  6. 2.322 km WNW of Elk Creek, California · 16498 days ago · 7 km deep · 96 km away
  7. 1.76 km WSW of Cobb, California · 16498 days ago · 3 km deep · 2 km away
  8. 2.22 km ENE of Windsor, California · 16498 days ago · 1 km deep · 26 km away
  9. 1.54 km SSE of Potter Valley, California · 16497 days ago · 10 km deep · 61 km away
  10. 1.59 km WSW of Cobb, California · 16497 days ago · 2 km deep · 4 km away
  11. 2.522 km NE of Potter Valley, California · 16497 days ago · 12 km deep · 76 km away
  12. 1.86 km W of Cobb, California · 16497 days ago · 0 km deep · 4 km away
  13. 1.95 km SW of Cobb, California · 16496 days ago · 0 km deep · 1 km away
  14. 2.65 km SW of Cobb, California · 16496 days ago · 1 km deep · 1 km away
  15. 1.55 km SW of Cobb, California · 16496 days ago · -1 km deep · 1 km away
  16. 1.66 km W of Cobb, California · 16496 days ago · 3 km deep · 3 km away
  17. 1.66 km W of Cobb, California · 16496 days ago · 3 km deep · 3 km away
  18. 1.99 km NW of Redwood Valley, California · 16493 days ago · 5 km deep · 73 km away
  19. 1.96 km SSW of Green Valley, California · 16491 days ago · 8 km deep · 85 km away
  20. 2.07 km WSW of Cobb, California · 16491 days ago · 0 km deep · 2 km away
  21. 1.79 km WSW of Cobb, California · 16491 days ago · 2 km deep · 4 km away
  22. 1.713 km NNE of Angwin, California · 16487 days ago · 9 km deep · 36 km away
  23. 1.76 km W of Cobb, California · 16487 days ago · 3 km deep · 3 km away
  24. 2.04 km WSW of Cobb, California · 16487 days ago · 4 km deep · 2 km away
  25. 1.66 km ESE of Talmage, California · 16487 days ago · 8 km deep · 45 km away
  26. 2.17 km WSW of Cobb, California · 16486 days ago · 4 km deep · 2 km away
  27. 1.82 km WNW of Cobb, California · 16486 days ago · 0 km deep · 5 km away
  28. 1.78 km WSW of Cobb, California · 16484 days ago · 1 km deep · 3 km away
  29. 1.76 km E of Suisun, California · 16484 days ago · 5 km deep · 94 km away
  30. 1.77 km E of Fairfield, California · 16484 days ago · 5 km deep · 95 km away
  31. 2.110 km N of Moskowite Corner, California · 16484 days ago · 7 km deep · 59 km away
  32. 1.57 km W of Cobb, California · 16484 days ago · 1 km deep · 5 km away
  33. 2.67 km W of Cobb, California · 16484 days ago · 1 km deep · 4 km away
  34. 1.78 km W of Cobb, California · 16484 days ago · 1 km deep · 5 km away
  35. 1.69 km WSW of Cobb, California · 16483 days ago · 2 km deep · 4 km away
  36. 1.69 km WSW of Cobb, California · 16483 days ago · 2 km deep · 4 km away
  37. 1.610 km ESE of Willits, California · 16482 days ago · 6 km deep · 77 km away
  38. 1.54 km WNW of Potter Valley, California · 16482 days ago · 9 km deep · 69 km away
  39. 2.09 km WSW of Cobb, California · 16481 days ago · 2 km deep · 4 km away
  40. 2.53 km NNW of Larkfield-Wikiup, California · 16481 days ago · 2 km deep · 28 km away
  41. 1.76 km W of Cobb, California · 16481 days ago · 4 km deep · 3 km away
  42. 1.69 km NE of Comptche, California · 16481 days ago · 5 km deep · 87 km away
  43. 2.11 km WSW of Geyserville, California · 16480 days ago · 5 km deep · 16 km away
  44. 1.74 km S of Cobb, California · 16480 days ago · 1 km deep · 5 km away
  45. 1.67 km NNW of Redwood Valley, California · 16480 days ago · 4 km deep · 71 km away
  46. 2.17 km W of Cobb, California · 16479 days ago · 4 km deep · 3 km away
  47. 1.54 km WNW of Potter Valley, California · 16479 days ago · -1 km deep · 69 km away
  48. 1.93 km NNW of Larkfield-Wikiup, California · 16478 days ago · 3 km deep · 28 km away
  49. 2.27 km W of Cobb, California · 16478 days ago · 4 km deep · 3 km away
  50. 1.74 km S of Cobb, California · 16477 days ago · 1 km deep · 5 km away
  51. 1.8near the coast of Northern California · 16476 days ago · 5 km deep · 59 km away
  52. 2.49 km WSW of Cobb, California · 16475 days ago · 1 km deep · 4 km away
  53. 2.78 km WSW of Cobb, California · 16474 days ago · 2 km deep · 3 km away
  54. 1.79 km WSW of Cobb, California · 16474 days ago · 3 km deep · 3 km away
  55. 1.59 km WSW of Cobb, California · 16474 days ago · 3 km deep · 4 km away
  56. 3.26 km W of Cobb, California · 16474 days ago · 4 km deep · 3 km away
  57. 1.810 km W of Cobb, California · 16473 days ago · -1 km deep · 6 km away
  58. 1.56 km W of Cobb, California · 16473 days ago · 1 km deep · 3 km away
  59. 1.711 km WNW of Cobb, California · 16473 days ago · 1 km deep · 8 km away
  60. 1.66 km WSW of Cobb, California · 16472 days ago · 4 km deep · 1 km away

The first 60 of 107.

Before

  1. 1.8Northern California · 16500 days ago · 2 km deep · 5 km away
  2. 1.87 km WSW of Cobb, California · 16501 days ago · 1 km deep · 2 km away
  3. 2.210 km ESE of Potter Valley, California · 16502 days ago · -1 km deep · 58 km away
  4. 2.56 km SSE of Dunnigan, California · 16502 days ago · 10 km deep · 74 km away
  5. 1.69 km WSW of Cobb, California · 16502 days ago · 1 km deep · 4 km away
  6. 2.04 km WSW of Cobb, California · 16502 days ago · 2 km deep · 2 km away
  7. 1.67 km E of Willits, California · 16504 days ago · 8 km deep · 80 km away
  8. 2.04 km ESE of Calpella, California · 16505 days ago · 6 km deep · 57 km away
  9. 1.56 km W of Cobb, California · 16505 days ago · 2 km deep · 3 km away
  10. 1.76 km W of Cobb, California · 16505 days ago · 3 km deep · 3 km away
  11. 1.96 km W of Cobb, California · 16505 days ago · 3 km deep · 3 km away
  12. 1.55 km WSW of Cobb, California · 16505 days ago · 4 km deep · 2 km away
  13. 2.07 km E of Larkfield-Wikiup, California · 16505 days ago · 5 km deep · 31 km away
  14. 1.97 km WSW of Cobb, California · 16505 days ago · 2 km deep · 2 km away
  15. 2.17 km W of Cobb, California · 16507 days ago · 4 km deep · 3 km away
  16. 1.85 km WSW of Kenwood, California · 16508 days ago · 8 km deep · 47 km away
  17. 2.04 km WSW of Cobb, California · 16508 days ago · 1 km deep · 2 km away
  18. 1.99 km WSW of Cobb, California · 16509 days ago · 1 km deep · 4 km away
  19. 2.10 km NNW of Larkfield-Wikiup, California · 16510 days ago · 2 km deep · 31 km away
  20. 2.24 km WSW of Cobb, California · 16511 days ago · 1 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1066002. Read Tue, Sep 29, 2026, 9:27 AM UTC.