California earthquakes

M1.7 earthquake 7 km E of Fairfield, California

A magnitude 1.7 earthquake struck 7 km E of Fairfield, California on Tue, Aug 11, 1981, 9:17 PM PDT (04:17 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.1 10 km N of Moskowite Corner, California. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.7 (md), micro
Local time
UTC
1981-08-12 04:17:40 UTC
Depth
4.8 km (3.0 mi), shallow
Epicenter
38.242° N, 121.956° 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 0.9 km horizontally, 15.9 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
198°, poorly surrounded by stations
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 115 in the 60 days after this one and 68 in the 30 days before it.

After

  1. 2.110 km N of Moskowite Corner, California · 16477 days ago · 7 km deep · 39 km away
  2. 1.57 km W of Cobb, California · 16477 days ago · 1 km deep · 99 km away
  3. 2.67 km W of Cobb, California · 16477 days ago · 1 km deep · 99 km away
  4. 1.78 km W of Cobb, California · 16477 days ago · 1 km deep · 99 km away
  5. 1.69 km WSW of Cobb, California · 16477 days ago · 2 km deep · 98 km away
  6. 1.69 km WSW of Cobb, California · 16477 days ago · 2 km deep · 98 km away
  7. 2.09 km WSW of Cobb, California · 16475 days ago · 2 km deep · 98 km away
  8. 2.53 km NNW of Larkfield-Wikiup, California · 16475 days ago · 2 km deep · 78 km away
  9. 1.76 km W of Cobb, California · 16475 days ago · 4 km deep · 98 km away
  10. 2.311 km SE of Sunol, California · 16473 days ago · 3 km deep · 81 km away
  11. 2.11 km WSW of Geyserville, California · 16473 days ago · 5 km deep · 98 km away
  12. 1.74 km S of Cobb, California · 16473 days ago · 1 km deep · 90 km away
  13. 2.17 km W of Cobb, California · 16473 days ago · 4 km deep · 98 km away
  14. 1.93 km NNW of Larkfield-Wikiup, California · 16472 days ago · 3 km deep · 78 km away
  15. 2.27 km W of Cobb, California · 16472 days ago · 4 km deep · 98 km away
  16. 1.79 km SE of Livermore, California · 16471 days ago · 8 km deep · 72 km away
  17. 1.74 km S of Cobb, California · 16470 days ago · 1 km deep · 90 km away
  18. 2.49 km WSW of Cobb, California · 16468 days ago · 1 km deep · 98 km away
  19. 1.76 km ENE of East Foothills, California · 16468 days ago · 4 km deep · 96 km away
  20. 2.78 km WSW of Cobb, California · 16468 days ago · 2 km deep · 97 km away
  21. 1.79 km WSW of Cobb, California · 16468 days ago · 3 km deep · 97 km away
  22. 1.59 km WSW of Cobb, California · 16468 days ago · 3 km deep · 98 km away
  23. 3.26 km W of Cobb, California · 16467 days ago · 4 km deep · 97 km away
  24. 1.56 km W of Cobb, California · 16466 days ago · 1 km deep · 97 km away
  25. 1.66 km WSW of Cobb, California · 16465 days ago · 4 km deep · 96 km away
  26. 1.66 km WSW of Cobb, California · 16465 days ago · 3 km deep · 96 km away
  27. 2.17 km WSW of Cobb, California · 16465 days ago · 0 km deep · 95 km away
  28. 1.87 km WSW of Cobb, California · 16465 days ago · 1 km deep · 96 km away
  29. 1.99 km WSW of Cobb, California · 16464 days ago · 2 km deep · 98 km away
  30. 1.611 km E of Blackhawk, California · 16463 days ago · 13 km deep · 48 km away
  31. 2.122 km SE of Livermore, California · 16463 days ago · 6 km deep · 84 km away
  32. 1.87 km W of Cobb, California · 16463 days ago · 2 km deep · 98 km away
  33. 1.71 km NW of Larkfield-Wikiup, California · 16463 days ago · 1 km deep · 77 km away
  34. 3.011 km SW of Brentwood, California · 16462 days ago · 16 km deep · 47 km away
  35. 2.111 km E of Blackhawk, California · 16462 days ago · 14 km deep · 48 km away
  36. 2.37 km E of East Foothills, California · 16461 days ago · 6 km deep · 99 km away
  37. 2.12 km E of San Leandro, California · 16460 days ago · 5 km deep · 59 km away
  38. 2.412 km N of Livermore, California · 16460 days ago · 12 km deep · 53 km away
  39. 1.65 km E of Fremont, California · 16458 days ago · 9 km deep · 78 km away
  40. 2.37 km WSW of Cobb, California · 16457 days ago · 2 km deep · 97 km away
  41. 2.06 km S of Sunol, California · 16457 days ago · 9 km deep · 79 km away
  42. 1.74 km N of Milpitas, California · 16456 days ago · 3 km deep · 86 km away
  43. 1.65 km E of Fremont, California · 16456 days ago · 10 km deep · 77 km away
  44. 1.611 km ENE of Milpitas, California · 16455 days ago · 4 km deep · 85 km away
  45. 1.79 km WSW of Cobb, California · 16455 days ago · 1 km deep · 98 km away
  46. 1.75 km SW of Cobb, California · 16455 days ago · 1 km deep · 94 km away
  47. 1.96 km WSW of Cobb, California · 16451 days ago · 3 km deep · 96 km away
  48. 2.06 km WSW of Cobb, California · 16451 days ago · 1 km deep · 96 km away
  49. 1.66 km WSW of Cobb, California · 16449 days ago · 0 km deep · 96 km away
  50. 1.67 km WSW of Cobb, California · 16449 days ago · 2 km deep · 97 km away
  51. 2.16 km W of Cobb, California · 16447 days ago · 4 km deep · 97 km away
  52. 1.61 km WSW of Belmont, California · 16447 days ago · 3 km deep · 86 km away
  53. 1.75 km W of Cobb, California · 16446 days ago · 4 km deep · 97 km away
  54. 1.5Northern California · 16446 days ago · 1 km deep · 99 km away
  55. 1.84 km S of Cobb, California · 16444 days ago · 2 km deep · 90 km away
  56. 1.64 km WSW of Cobb, California · 16443 days ago · 2 km deep · 94 km away
  57. 1.64 km WSW of Cobb, California · 16442 days ago · 1 km deep · 94 km away
  58. 1.75 km WNW of Broadmoor, California · 16442 days ago · 4 km deep · 78 km away
  59. 2.03 km WNW of Lower Lake, California · 16440 days ago · 1 km deep · 96 km away
  60. 2.37 km WSW of Cobb, California · 16438 days ago · 4 km deep · 97 km away

The first 60 of 115.

Before

  1. 1.76 km E of Suisun, California · 16478 days ago · 5 km deep · 1 km away
  2. 1.78 km WSW of Cobb, California · 16478 days ago · 1 km deep · 98 km away
  3. 1.82 km WNW of Cobb, California · 16479 days ago · 0 km deep · 95 km away
  4. 2.17 km WSW of Cobb, California · 16480 days ago · 4 km deep · 96 km away
  5. 2.04 km WSW of Cobb, California · 16480 days ago · 4 km deep · 95 km away
  6. 1.99 km WSW of Brentwood, California · 16480 days ago · 16 km deep · 40 km away
  7. 1.87 km E of East Foothills, California · 16480 days ago · 7 km deep · 97 km away
  8. 2.07 km E of East Foothills, California · 16480 days ago · 7 km deep · 98 km away
  9. 1.76 km W of Cobb, California · 16480 days ago · 3 km deep · 97 km away
  10. 1.713 km NNE of Angwin, California · 16481 days ago · 9 km deep · 63 km away
  11. 1.66 km SW of Moraga, California · 16481 days ago · 10 km deep · 54 km away
  12. 1.79 km WSW of Cobb, California · 16485 days ago · 2 km deep · 98 km away
  13. 2.07 km WSW of Cobb, California · 16485 days ago · 0 km deep · 97 km away
  14. 1.96 km SSW of Green Valley, California · 16485 days ago · 8 km deep · 21 km away
  15. 1.66 km W of Cobb, California · 16489 days ago · 3 km deep · 97 km away
  16. 1.66 km W of Cobb, California · 16489 days ago · 3 km deep · 97 km away
  17. 1.63 km WSW of Blackhawk, California · 16489 days ago · 16 km deep · 48 km away
  18. 2.213 km NE of East Foothills, California · 16489 days ago · 8 km deep · 88 km away
  19. 1.55 km SW of Cobb, California · 16489 days ago · -1 km deep · 93 km away
  20. 2.65 km SW of Cobb, California · 16489 days ago · 1 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1066614. Read Tue, Sep 22, 2026, 8:47 PM UTC.