California earthquakes

M1.6 earthquake 6 km W of Cobb, California

A magnitude 1.6 earthquake struck 6 km W of Cobb, California on Fri, Jul 31, 1981, 2:15 PM PDT (21:15 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.9 9 km NW of Redwood Valley, 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1981-07-31 21:15:23 UTC
Depth
2.7 km (1.7 mi), shallow
Epicenter
38.818° N, 122.800° 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 0.3 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
54°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 67 in the 30 days before it.

After

  1. 1.99 km NW of Redwood Valley, California · 16487 days ago · 5 km deep · 70 km away
  2. 1.96 km SSW of Green Valley, California · 16485 days ago · 8 km deep · 88 km away
  3. 2.07 km WSW of Cobb, California · 16485 days ago · 0 km deep · 2 km away
  4. 1.79 km WSW of Cobb, California · 16484 days ago · 2 km deep · 3 km away
  5. 1.713 km NNE of Angwin, California · 16480 days ago · 9 km deep · 38 km away
  6. 1.76 km W of Cobb, California · 16480 days ago · 3 km deep · 1 km away
  7. 2.04 km WSW of Cobb, California · 16480 days ago · 4 km deep · 3 km away
  8. 1.66 km ESE of Talmage, California · 16480 days ago · 8 km deep · 42 km away
  9. 2.17 km WSW of Cobb, California · 16480 days ago · 4 km deep · 2 km away
  10. 1.82 km WNW of Cobb, California · 16479 days ago · 0 km deep · 4 km away
  11. 1.78 km WSW of Cobb, California · 16478 days ago · 1 km deep · 2 km away
  12. 1.76 km E of Suisun, California · 16478 days ago · 5 km deep · 97 km away
  13. 1.77 km E of Fairfield, California · 16478 days ago · 5 km deep · 97 km away
  14. 2.110 km N of Moskowite Corner, California · 16477 days ago · 7 km deep · 61 km away
  15. 1.57 km W of Cobb, California · 16477 days ago · 1 km deep · 1 km away
  16. 2.67 km W of Cobb, California · 16477 days ago · 1 km deep · 1 km away
  17. 1.78 km W of Cobb, California · 16477 days ago · 1 km deep · 2 km away
  18. 1.69 km WSW of Cobb, California · 16477 days ago · 2 km deep · 3 km away
  19. 1.69 km WSW of Cobb, California · 16477 days ago · 2 km deep · 3 km away
  20. 1.610 km ESE of Willits, California · 16475 days ago · 6 km deep · 74 km away
  21. 1.54 km WNW of Potter Valley, California · 16475 days ago · 9 km deep · 66 km away
  22. 2.09 km WSW of Cobb, California · 16475 days ago · 2 km deep · 3 km away
  23. 2.53 km NNW of Larkfield-Wikiup, California · 16475 days ago · 2 km deep · 31 km away
  24. 1.76 km W of Cobb, California · 16474 days ago · 4 km deep · 1 km away
  25. 1.69 km NE of Comptche, California · 16474 days ago · 5 km deep · 84 km away
  26. 2.11 km WSW of Geyserville, California · 16473 days ago · 5 km deep · 17 km away
  27. 1.74 km S of Cobb, California · 16473 days ago · 1 km deep · 8 km away
  28. 1.67 km NNW of Redwood Valley, California · 16473 days ago · 4 km deep · 68 km away
  29. 2.17 km W of Cobb, California · 16473 days ago · 4 km deep · 1 km away
  30. 1.54 km WNW of Potter Valley, California · 16472 days ago · -1 km deep · 66 km away
  31. 1.93 km NNW of Larkfield-Wikiup, California · 16472 days ago · 3 km deep · 31 km away
  32. 2.27 km W of Cobb, California · 16471 days ago · 4 km deep · 0 km away
  33. 1.74 km S of Cobb, California · 16470 days ago · 1 km deep · 8 km away
  34. 1.8near the coast of Northern California · 16469 days ago · 5 km deep · 56 km away
  35. 2.49 km WSW of Cobb, California · 16468 days ago · 1 km deep · 3 km away
  36. 2.78 km WSW of Cobb, California · 16467 days ago · 2 km deep · 3 km away
  37. 1.79 km WSW of Cobb, California · 16467 days ago · 3 km deep · 3 km away
  38. 1.59 km WSW of Cobb, California · 16467 days ago · 3 km deep · 3 km away
  39. 3.26 km W of Cobb, California · 16467 days ago · 4 km deep · 1 km away
  40. 1.810 km W of Cobb, California · 16467 days ago · -1 km deep · 4 km away
  41. 1.56 km W of Cobb, California · 16466 days ago · 1 km deep · 1 km away
  42. 1.711 km WNW of Cobb, California · 16466 days ago · 1 km deep · 5 km away
  43. 1.66 km WSW of Cobb, California · 16465 days ago · 4 km deep · 2 km away
  44. 1.66 km WSW of Cobb, California · 16465 days ago · 3 km deep · 2 km away
  45. 2.17 km WSW of Cobb, California · 16465 days ago · 0 km deep · 3 km away
  46. 1.87 km WSW of Cobb, California · 16465 days ago · 1 km deep · 2 km away
  47. 1.99 km WSW of Cobb, California · 16464 days ago · 2 km deep · 3 km away
  48. 1.723 km NE of Potter Valley, California · 16464 days ago · 10 km deep · 74 km away
  49. 1.87 km W of Cobb, California · 16463 days ago · 2 km deep · 1 km away
  50. 1.71 km NW of Larkfield-Wikiup, California · 16463 days ago · 1 km deep · 33 km away
  51. 1.89 km NW of Cobb, California · 16463 days ago · 2 km deep · 7 km away
  52. 1.719 km ENE of Potter Valley, California · 16459 days ago · 11 km deep · 66 km away
  53. 1.57 km SW of Clear Lake Riviera, California · 16458 days ago · 2 km deep · 10 km away
  54. 1.85 km NNW of Redwood Valley, California · 16458 days ago · 8 km deep · 66 km away
  55. 1.67 km NE of Hopland, California · 16457 days ago · 2 km deep · 32 km away
  56. 2.37 km WSW of Cobb, California · 16457 days ago · 2 km deep · 1 km away
  57. 1.825 km NNE of Potter Valley, California · 16457 days ago · 9 km deep · 80 km away
  58. 1.726 km NNE of Potter Valley, California · 16457 days ago · 10 km deep · 80 km away
  59. 1.711 km NNW of Potter Valley, California · 16457 days ago · 8 km deep · 73 km away
  60. 1.79 km WSW of Cobb, California · 16455 days ago · 1 km deep · 3 km away

The first 60 of 98.

Before

  1. 1.66 km W of Cobb, California · 16489 days ago · 3 km deep · 0 km away
  2. 1.55 km SW of Cobb, California · 16489 days ago · -1 km deep · 4 km away
  3. 2.65 km SW of Cobb, California · 16489 days ago · 1 km deep · 4 km away
  4. 1.95 km SW of Cobb, California · 16489 days ago · 0 km deep · 4 km away
  5. 1.86 km W of Cobb, California · 16490 days ago · 0 km deep · 1 km away
  6. 2.522 km NE of Potter Valley, California · 16490 days ago · 12 km deep · 73 km away
  7. 1.59 km WSW of Cobb, California · 16490 days ago · 2 km deep · 3 km away
  8. 1.54 km SSE of Potter Valley, California · 16490 days ago · 10 km deep · 58 km away
  9. 2.22 km ENE of Windsor, California · 16491 days ago · 1 km deep · 29 km away
  10. 1.76 km WSW of Cobb, California · 16491 days ago · 3 km deep · 1 km away
  11. 2.322 km WNW of Elk Creek, California · 16492 days ago · 7 km deep · 93 km away
  12. 1.56 km WSW of Cobb, California · 16492 days ago · 0 km deep · 2 km away
  13. 2.45 km WSW of Cobb, California · 16492 days ago · 1 km deep · 2 km away
  14. 1.86 km WSW of Cobb, California · 16492 days ago · 0 km deep · 2 km away
  15. 3.06 km WSW of Cobb, California · 16492 days ago · 4 km deep · 1 km away
  16. 1.96 km WSW of Cobb, California · 16492 days ago · 3 km deep · 1 km away
  17. 1.66 km WSW of Cobb, California · 16493 days ago · 0 km deep · 3 km away
  18. 1.8Northern California · 16493 days ago · 2 km deep · 3 km away
  19. 1.87 km WSW of Cobb, California · 16495 days ago · 1 km deep · 2 km away
  20. 2.210 km ESE of Potter Valley, California · 16495 days ago · -1 km deep · 55 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1066178. Read Tue, Sep 22, 2026, 5:20 PM UTC.