California earthquakes

M2.1 earthquake 7 km WSW of Cobb, California

A magnitude 2.1 earthquake struck 7 km WSW of Cobb, California on Sat, Jul 11, 1987, 1:00 PM PDT (20:00 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.1 6 km SW 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.1 (md), micro
Local time
UTC
1987-07-11 20:00:17 UTC
Depth
-0.2 km (-0.1 mi), shallow
Epicenter
38.807° N, 122.803° 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, 0.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
59°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 169 in the 60 days after this one and 119 in the 30 days before it.

After

  1. 2.19 km WSW of Cobb, California · 14326 days ago · 1 km deep · 3 km away
  2. 2.08 km W of Cobb, California · 14326 days ago · 0 km deep · 2 km away
  3. 2.19 km WSW of Cobb, California · 14326 days ago · 2 km deep · 2 km away
  4. 1.99 km NNE of Brooktrails, California · 14325 days ago · 9 km deep · 91 km away
  5. 1.54 km SW of Cobb, California · 14325 days ago · 0 km deep · 4 km away
  6. 2.16 km WSW of Cobb, California · 14324 days ago · 3 km deep · 1 km away
  7. 1.93 km NNW of Cloverdale, California · 14324 days ago · -1 km deep · 20 km away
  8. 1.86 km W of Cobb, California · 14324 days ago · -1 km deep · 0 km away
  9. 1.73 km W of Cobb, California · 14323 days ago · -1 km deep · 3 km away
  10. 2.06 km W of Cobb, California · 14323 days ago · 3 km deep · 1 km away
  11. 1.84 km W of Cobb, California · 14323 days ago · 0 km deep · 3 km away
  12. 2.58 km W of Cobb, California · 14323 days ago · 0 km deep · 3 km away
  13. 1.88 km W of Cobb, California · 14323 days ago · -1 km deep · 3 km away
  14. 1.68 km W of Cobb, California · 14323 days ago · 1 km deep · 1 km away
  15. 2.27 km WSW of Cobb, California · 14323 days ago · 0 km deep · 1 km away
  16. 1.84 km WNW of Cobb, California · 14322 days ago · 2 km deep · 4 km away
  17. 1.74 km WNW of Cobb, California · 14322 days ago · 2 km deep · 4 km away
  18. 1.65 km SSW of Cobb, California · 14322 days ago · 3 km deep · 5 km away
  19. 2.16 km WSW of Cobb, California · 14321 days ago · 1 km deep · 1 km away
  20. 1.78 km W of Cobb, California · 14321 days ago · 2 km deep · 3 km away
  21. 1.77 km W of Cobb, California · 14321 days ago · 3 km deep · 1 km away
  22. 1.85 km SW of Cobb, California · 14320 days ago · -1 km deep · 5 km away
  23. 2.45 km SW of Cobb, California · 14320 days ago · 2 km deep · 4 km away
  24. 1.64 km N of Cloverdale, California · 14320 days ago · 4 km deep · 20 km away
  25. 2.09 km W of Cobb, California · 14320 days ago · -1 km deep · 2 km away
  26. 1.79 km W of Cobb, California · 14320 days ago · -1 km deep · 2 km away
  27. 2.15 km W of Cobb, California · 14320 days ago · 0 km deep · 2 km away
  28. 1.76 km WSW of Cobb, California · 14320 days ago · 0 km deep · 1 km away
  29. 1.65 km SSW of Cobb, California · 14320 days ago · 4 km deep · 6 km away
  30. 1.76 km WSW of Cobb, California · 14320 days ago · 1 km deep · 1 km away
  31. 1.68 km WSW of Cobb, California · 14318 days ago · 3 km deep · 2 km away
  32. 1.817 km NNE of Angwin, California · 14318 days ago · 6 km deep · 37 km away
  33. 1.66 km W of Cobb, California · 14317 days ago · 2 km deep · 1 km away
  34. 1.95 km W of Cobb, California · 14317 days ago · -1 km deep · 2 km away
  35. 1.66 km W of Cobb, California · 14317 days ago · 1 km deep · 2 km away
  36. 2.55 km WSW of Cobb, California · 14317 days ago · 0 km deep · 2 km away
  37. 2.04 km SW of Cobb, California · 14317 days ago · 42 km deep · 4 km away
  38. 1.93 km NW of Hidden Valley Lake, California · 14316 days ago · 22 km deep · 20 km away
  39. 2.57 km W of Cobb, California · 14316 days ago · 1 km deep · 2 km away
  40. 1.68 km W of Cobb, California · 14316 days ago · 1 km deep · 2 km away
  41. 1.67 km W of Cobb, California · 14316 days ago · 1 km deep · 1 km away
  42. 1.9Northern California · 14316 days ago · -1 km deep · 4 km away
  43. 1.73 km ESE of Hopland, California · 14316 days ago · 1 km deep · 30 km away
  44. 1.86 km SSW of Calistoga, California · 14315 days ago · 5 km deep · 37 km away
  45. 1.74 km W of Cobb, California · 14315 days ago · 0 km deep · 3 km away
  46. 1.66 km W of Middletown, California · 14315 days ago · -1 km deep · 11 km away
  47. 3.16 km SW of Cobb, California · 14315 days ago · 0 km deep · 4 km away
  48. 2.1Northern California · 14315 days ago · 3 km deep · 2 km away
  49. 1.8Northern California · 14314 days ago · 0 km deep · 2 km away
  50. 1.86 km W of Cobb, California · 14314 days ago · 1 km deep · 2 km away
  51. 1.95 km WSW of Cobb, California · 14314 days ago · -1 km deep · 1 km away
  52. 1.87 km W of Cobb, California · 14314 days ago · 1 km deep · 3 km away
  53. 1.78 km W of Cobb, California · 14314 days ago · 0 km deep · 3 km away
  54. 1.67 km WSW of Cobb, California · 14314 days ago · 3 km deep · 1 km away
  55. 2.14 km WSW of Cobb, California · 14314 days ago · 0 km deep · 2 km away
  56. 1.63 km W of Cobb, California · 14313 days ago · -1 km deep · 4 km away
  57. 2.24 km W of Cobb, California · 14313 days ago · 1 km deep · 2 km away
  58. 1.56 km W of Cobb, California · 14313 days ago · 2 km deep · 2 km away
  59. 2.95 km SW of Cobb, California · 14313 days ago · 0 km deep · 4 km away
  60. 1.87 km W of Cobb, California · 14313 days ago · 3 km deep · 1 km away

The first 60 of 169.

Before

  1. 1.912 km WSW of Hopland, California · 14327 days ago · 1 km deep · 40 km away
  2. 1.96 km WSW of Cobb, California · 14327 days ago · 4 km deep · 1 km away
  3. 2.06 km W of Cobb, California · 14328 days ago · 4 km deep · 2 km away
  4. 1.74 km SSW of Cobb, California · 14328 days ago · 1 km deep · 5 km away
  5. 1.94 km WSW of Cobb, California · 14328 days ago · 1 km deep · 3 km away
  6. 1.85 km SW of Cobb, California · 14329 days ago · 0 km deep · 3 km away
  7. 1.69 km WSW of Cobb, California · 14329 days ago · 1 km deep · 2 km away
  8. 1.94 km W of Cobb, California · 14329 days ago · 0 km deep · 3 km away
  9. 2.03 km SW of Cobb, California · 14329 days ago · 2 km deep · 5 km away
  10. 1.68 km W of Cobb, California · 14329 days ago · 1 km deep · 2 km away
  11. 2.48 km WSW of Cobb, California · 14329 days ago · 2 km deep · 1 km away
  12. 1.711 km E of Calpella, California · 14330 days ago · 1 km deep · 51 km away
  13. 2.05 km NE of Penngrove, California · 14330 days ago · 4 km deep · 55 km away
  14. 1.65 km W of Cobb, California · 14331 days ago · 0 km deep · 2 km away
  15. 1.6Northern California · 14331 days ago · -1 km deep · 5 km away
  16. 2.54 km W of Cobb, California · 14332 days ago · 0 km deep · 3 km away
  17. 2.15 km SW of Cobb, California · 14332 days ago · 0 km deep · 3 km away
  18. 3.05 km SW of Cobb, California · 14332 days ago · 0 km deep · 4 km away
  19. 1.84 km W of Cobb, California · 14332 days ago · 2 km deep · 3 km away
  20. 1.92 km N of Larkfield-Wikiup, California · 14333 days ago · 5 km deep · 31 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc102986. Read Wed, Sep 30, 2026, 7:18 PM UTC.