California earthquakes

M1.8 earthquake 8 km WNW of Cobb, California

A magnitude 1.8 earthquake struck 8 km WNW of Cobb, California on Wed, Feb 11, 1987, 2:35 PM PST (22:35 UTC), -1 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-02-11 22:35:51 UTC
Depth
-1.0 km (-0.6 mi), shallow
Epicenter
38.849° N, 122.818° 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 1.4 km horizontally, 8.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
117°
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 175 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 2.05 km WSW of Cobb, California · 14477 days ago · 0 km deep · 6 km away
  2. 1.67 km W of Kenwood, California · 14477 days ago · 6 km deep · 50 km away
  3. 2.96 km W of Cobb, California · 14476 days ago · 0 km deep · 3 km away
  4. 1.76 km W of Cobb, California · 14476 days ago · 0 km deep · 3 km away
  5. 3.16 km W of Cobb, California · 14476 days ago · 1 km deep · 3 km away
  6. 1.85 km SW of Cobb, California · 14476 days ago · 2 km deep · 9 km away
  7. 2.014 km ENE of Angwin, California · 14476 days ago · 9 km deep · 50 km away
  8. 2.04 km W of Cobb, California · 14475 days ago · 0 km deep · 4 km away
  9. 2.510 km NW of Cobb, California · 14474 days ago · 0 km deep · 3 km away
  10. 1.68 km WSW of Cobb, California · 14474 days ago · 4 km deep · 6 km away
  11. 2.36 km W of Cobb, California · 14474 days ago · 3 km deep · 4 km away
  12. 1.82 km E of Forestville, California · 14474 days ago · 2 km deep · 42 km away
  13. 1.56 km W of Cobb, California · 14473 days ago · 3 km deep · 3 km away
  14. 1.823 km NE of Potter Valley, California · 14472 days ago · 5 km deep · 68 km away
  15. 1.90 km S of Fulton, California · 14471 days ago · 6 km deep · 40 km away
  16. 1.65 km WNW of Cobb, California · 14471 days ago · 1 km deep · 3 km away
  17. 1.75 km WNW of Cobb, California · 14471 days ago · 1 km deep · 3 km away
  18. 1.86 km W of Cobb, California · 14471 days ago · 3 km deep · 4 km away
  19. 1.97 km W of Cobb, California · 14471 days ago · 1 km deep · 2 km away
  20. 2.06 km SW of Cobb, California · 14471 days ago · 2 km deep · 8 km away
  21. 2.06 km W of Cobb, California · 14471 days ago · 4 km deep · 4 km away
  22. 3.111 km NNE of Comptche, California · 14470 days ago · 2 km deep · 83 km away
  23. 1.69 km ESE of Hidden Valley Lake, California · 14470 days ago · 7 km deep · 32 km away
  24. 1.86 km SW of Cobb, California · 14469 days ago · 3 km deep · 8 km away
  25. 2.19 km W of Cobb, California · 14469 days ago · 1 km deep · 5 km away
  26. 1.74 km W of Cobb, California · 14469 days ago · -1 km deep · 5 km away
  27. 1.77 km W of Cobb, California · 14469 days ago · 3 km deep · 4 km away
  28. 2.56 km W of Cobb, California · 14468 days ago · 2 km deep · 4 km away
  29. 2.36 km W of Cobb, California · 14468 days ago · 2 km deep · 3 km away
  30. 1.79 km WSW of Cobb, California · 14468 days ago · 2 km deep · 5 km away
  31. 1.76 km WSW of Cobb, California · 14468 days ago · 3 km deep · 5 km away
  32. 1.52 km SSE of Cobb, California · 14468 days ago · 4 km deep · 10 km away
  33. 1.710 km NW of Cobb, California · 14468 days ago · 1 km deep · 3 km away
  34. 1.81 km W of Cobb, California · 14467 days ago · 4 km deep · 8 km away
  35. 1.59 km W of Cobb, California · 14467 days ago · 0 km deep · 4 km away
  36. 2.16 km W of Cobb, California · 14466 days ago · 3 km deep · 4 km away
  37. 2.13 km SW of Cobb, California · 14466 days ago · 1 km deep · 9 km away
  38. 2.47 km WSW of Cobb, California · 14465 days ago · 1 km deep · 5 km away
  39. 2.04 km SW of Cobb, California · 14465 days ago · 1 km deep · 8 km away
  40. 1.96 km W of Cobb, California · 14465 days ago · 3 km deep · 3 km away
  41. 1.76 km WSW of Cobb, California · 14465 days ago · 4 km deep · 5 km away
  42. 1.84 km WSW of Cobb, California · 14464 days ago · 1 km deep · 6 km away
  43. 1.89 km W of Cobb, California · 14464 days ago · -1 km deep · 3 km away
  44. 2.117 km SW of Cloverdale, California · 14464 days ago · 14 km deep · 34 km away
  45. 1.95 km WNW of Cobb, California · 14464 days ago · 0 km deep · 3 km away
  46. 1.67 km WSW of Cobb, California · 14463 days ago · 1 km deep · 6 km away
  47. 1.65 km SW of Cobb, California · 14463 days ago · -1 km deep · 9 km away
  48. 1.64 km ESE of Philo, California · 14463 days ago · 6 km deep · 55 km away
  49. 2.021 km NE of Potter Valley, California · 14463 days ago · 11 km deep · 69 km away
  50. 2.19 km NW of Bayview, California · 14463 days ago · 6 km deep · 95 km away
  51. 1.8Northern California · 14463 days ago · 4 km deep · 60 km away
  52. 1.84 km WNW of Cobb, California · 14462 days ago · 2 km deep · 4 km away
  53. 1.520 km ENE of Potter Valley, California · 14462 days ago · 4 km deep · 60 km away
  54. 3.26 km W of Cobb, California · 14461 days ago · 3 km deep · 4 km away
  55. 2.55 km SW of Cobb, California · 14460 days ago · 1 km deep · 8 km away
  56. 2.05 km SW of Cobb, California · 14460 days ago · 1 km deep · 8 km away
  57. 2.34 km W of Cobb, California · 14459 days ago · 1 km deep · 4 km away
  58. 1.918 km ENE of Potter Valley, California · 14459 days ago · 7 km deep · 57 km away
  59. 1.95 km WSW of Cobb, California · 14459 days ago · 1 km deep · 6 km away
  60. 1.68 km WSW of Cobb, California · 14459 days ago · 0 km deep · 5 km away

The first 60 of 175.

Before

  1. 1.66 km WNW of Cobb, California · 14477 days ago · -1 km deep · 2 km away
  2. 1.97 km WSW of Cobb, California · 14477 days ago · 1 km deep · 5 km away
  3. 1.67 km WSW of Cobb, California · 14477 days ago · 1 km deep · 5 km away
  4. 2.46 km E of Hopland, California · 14479 days ago · 7 km deep · 24 km away
  5. 1.98 km W of Cobb, California · 14479 days ago · 1 km deep · 4 km away
  6. 1.88 km W of Cobb, California · 14479 days ago · 0 km deep · 3 km away
  7. 1.67 km W of Cobb, California · 14479 days ago · 3 km deep · 3 km away
  8. 1.918 km E of Sea Ranch, California · 14480 days ago · 0 km deep · 39 km away
  9. 2.06 km W of Cobb, California · 14480 days ago · 3 km deep · 4 km away
  10. 1.7Northern California · 14480 days ago · 0 km deep · 5 km away
  11. 1.65 km SW of Cobb, California · 14482 days ago · 1 km deep · 8 km away
  12. 1.65 km W of Cobb, California · 14483 days ago · 0 km deep · 5 km away
  13. 2.011 km NE of Talmage, California · 14483 days ago · 7 km deep · 45 km away
  14. 1.66 km W of Cobb, California · 14484 days ago · 3 km deep · 4 km away
  15. 2.09 km W of Cobb, California · 14484 days ago · -1 km deep · 3 km away
  16. 2.09 km W of Cobb, California · 14484 days ago · 0 km deep · 3 km away
  17. 1.99 km W of Cobb, California · 14485 days ago · 4 km deep · 4 km away
  18. 1.54 km W of Cobb, California · 14485 days ago · -1 km deep · 4 km away
  19. 1.87 km W of Cobb, California · 14485 days ago · 0 km deep · 2 km away
  20. 1.85 km WNW of Cobb, California · 14486 days ago · 2 km deep · 4 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1147321. Read Thu, Oct 1, 2026, 11:45 PM UTC.