California earthquakes

M2.7 earthquake 5 km W of Cobb, California

A magnitude 2.7 earthquake struck 5 km W of Cobb, California on Fri, Jan 9, 1987, 8:15 PM PST (04:15 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M2.8 2 km ENE of Rohnert Park, 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
1987-01-10 04:15:57 UTC
Depth
0.5 km (0.3 mi), shallow
Epicenter
38.830° N, 122.780° 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 0.1 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
39°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 172 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.82 km ENE of Rohnert Park, California · 14495 days ago · 6 km deep · 55 km away
  2. 2.010 km E of Hidden Valley Lake, California · 14495 days ago · 10 km deep · 29 km away
  3. 1.91 km ENE of Rohnert Park, California · 14495 days ago · 3 km deep · 55 km away
  4. 2.27 km E of Hidden Valley Lake, California · 14495 days ago · 8 km deep · 27 km away
  5. 2.02 km ENE of Rohnert Park, California · 14494 days ago · 3 km deep · 55 km away
  6. 1.86 km NE of Windsor, California · 14494 days ago · 3 km deep · 27 km away
  7. 1.61 km E of Roseland, California · 14494 days ago · 17 km deep · 46 km away
  8. 1.62 km ENE of Penngrove, California · 14494 days ago · 0 km deep · 59 km away
  9. 1.56 km E of Cloverdale, California · 14494 days ago · 0 km deep · 14 km away
  10. 1.66 km W of Cobb, California · 14493 days ago · 2 km deep · 1 km away
  11. 1.75 km SW of Cobb, California · 14493 days ago · 1 km deep · 5 km away
  12. 1.76 km W of Cobb, California · 14492 days ago · 2 km deep · 1 km away
  13. 1.86 km W of Cobb, California · 14492 days ago · 3 km deep · 2 km away
  14. 1.56 km W of Cobb, California · 14492 days ago · 0 km deep · 2 km away
  15. 1.86 km W of Cobb, California · 14492 days ago · 1 km deep · 2 km away
  16. 1.89 km W of Cobb, California · 14492 days ago · 0 km deep · 4 km away
  17. 1.712 km ENE of Cloverdale, California · 14491 days ago · 0 km deep · 9 km away
  18. 1.75 km WNW of Cobb, California · 14491 days ago · 0 km deep · 1 km away
  19. 1.88 km E of Hidden Valley Lake, California · 14490 days ago · 8 km deep · 28 km away
  20. 2.48 km E of Hidden Valley Lake, California · 14490 days ago · 9 km deep · 27 km away
  21. 1.811 km E of Black Point-Green Point, California · 14490 days ago · 16 km deep · 88 km away
  22. 1.77 km NE of Healdsburg, California · 14490 days ago · 2 km deep · 19 km away
  23. 1.916 km SE of Sea Ranch, California · 14489 days ago · 4 km deep · 56 km away
  24. 1.64 km WSW of Cobb, California · 14489 days ago · 1 km deep · 3 km away
  25. 1.67 km W of Cobb, California · 14488 days ago · 0 km deep · 3 km away
  26. 2.13 km WSW of Green Valley, California · 14488 days ago · 8 km deep · 83 km away
  27. 1.96 km W of Cobb, California · 14488 days ago · -1 km deep · 1 km away
  28. 2.15 km WSW of Cobb, California · 14487 days ago · -1 km deep · 3 km away
  29. 1.98 km W of Cobb, California · 14487 days ago · 1 km deep · 4 km away
  30. 1.86 km W of Cobb, California · 14487 days ago · -1 km deep · 1 km away
  31. 2.27 km WSW of Cobb, California · 14487 days ago · 3 km deep · 5 km away
  32. 2.37 km WSW of Cobb, California · 14486 days ago · 3 km deep · 4 km away
  33. 1.79 km ESE of Hidden Valley Lake, California · 14486 days ago · 7 km deep · 29 km away
  34. 2.35 km W of Cobb, California · 14486 days ago · 1 km deep · 1 km away
  35. 2.17 km ENE of Rohnert Park, California · 14486 days ago · 4 km deep · 52 km away
  36. 2.26 km WNW of Cobb, California · 14485 days ago · -1 km deep · 2 km away
  37. 2.16 km W of Cobb, California · 14485 days ago · 1 km deep · 2 km away
  38. 1.711 km ENE of Cloverdale, California · 14485 days ago · 6 km deep · 11 km away
  39. 1.716 km ENE of Potter Valley, California · 14485 days ago · 7 km deep · 62 km away
  40. 3.06 km WSW of Cobb, California · 14485 days ago · 0 km deep · 3 km away
  41. 1.76 km WSW of Cobb, California · 14485 days ago · 1 km deep · 3 km away
  42. 2.46 km WSW of Cobb, California · 14485 days ago · 3 km deep · 4 km away
  43. 1.67 km WSW of Cobb, California · 14485 days ago · 1 km deep · 4 km away
  44. 1.73 km W of Cobb, California · 14484 days ago · 0 km deep · 1 km away
  45. 2.29 km W of Cobb, California · 14484 days ago · -1 km deep · 5 km away
  46. 1.66 km W of Cobb, California · 14483 days ago · 3 km deep · 2 km away
  47. 2.77 km WSW of Cobb, California · 14483 days ago · 0 km deep · 4 km away
  48. 1.66 km WSW of Cobb, California · 14483 days ago · 0 km deep · 3 km away
  49. 1.53 km SW of Cobb, California · 14483 days ago · 0 km deep · 5 km away
  50. 1.66 km WNW of Cobb, California · 14483 days ago · 0 km deep · 1 km away
  51. 1.86 km W of Cobb, California · 14482 days ago · 3 km deep · 2 km away
  52. 1.86 km W of Cobb, California · 14482 days ago · 1 km deep · 1 km away
  53. 2.15 km SW of Cobb, California · 14482 days ago · 2 km deep · 5 km away
  54. 1.96 km W of Cobb, California · 14482 days ago · 3 km deep · 2 km away
  55. 2.05 km WNW of Cobb, California · 14481 days ago · 1 km deep · 1 km away
  56. 2.4Northern California · 14480 days ago · -1 km deep · 34 km away
  57. 2.05 km SW of Cobb, California · 14479 days ago · 0 km deep · 5 km away
  58. 1.96 km W of Cobb, California · 14478 days ago · 3 km deep · 2 km away
  59. 2.06 km W of Cobb, California · 14477 days ago · 0 km deep · 2 km away
  60. 1.75 km W of Cobb, California · 14477 days ago · 1 km deep · 1 km away

The first 60 of 172.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc92220. Read Tue, Sep 22, 2026, 9:13 AM UTC.