California earthquakes

M1.6 earthquake 4 km W of Cobb, California

A magnitude 1.6 earthquake struck 4 km W of Cobb, California on Sat, Jun 13, 1987, 12:47 PM PDT (19:47 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.4 6 km WNW 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
1.6 (md), micro
Local time
UTC
1987-06-13 19:47:01 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
38.827° N, 122.771° 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 0.4 km horizontally, 2.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
101°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.46 km WNW of Cobb, California · 14333 days ago · 0 km deep · 2 km away
  2. 2.87 km WNW of Cobb, California · 14333 days ago · -1 km deep · 3 km away
  3. 1.66 km W of Cobb, California · 14333 days ago · 3 km deep · 2 km away
  4. 1.55 km W of Cobb, California · 14332 days ago · 1 km deep · 1 km away
  5. 1.86 km W of Cobb, California · 14332 days ago · 3 km deep · 2 km away
  6. 2.24 km WSW of Cobb, California · 14332 days ago · 0 km deep · 3 km away
  7. 1.94 km W of Cobb, California · 14331 days ago · 0 km deep · 1 km away
  8. 2.05 km W of Cobb, California · 14331 days ago · -1 km deep · 2 km away
  9. 1.66 km WSW of Cobb, California · 14331 days ago · 0 km deep · 3 km away
  10. 1.66 km W of Cobb, California · 14331 days ago · 3 km deep · 2 km away
  11. 2.55 km SW of Cobb, California · 14331 days ago · 2 km deep · 4 km away
  12. 2.35 km WSW of Cobb, California · 14330 days ago · 3 km deep · 2 km away
  13. 3.223 km NE of Potter Valley, California · 14329 days ago · 9 km deep · 76 km away
  14. 1.59 km SSE of Boonville, California · 14329 days ago · 3 km deep · 49 km away
  15. 1.87 km W of Cobb, California · 14329 days ago · -1 km deep · 4 km away
  16. 2.711 km N of Cloverdale, California · 14328 days ago · 5 km deep · 22 km away
  17. 2.39 km WSW of Cobb, California · 14328 days ago · 2 km deep · 6 km away
  18. 1.88 km WSW of Cobb, California · 14328 days ago · 1 km deep · 5 km away
  19. 1.76 km WNW of Kenwood, California · 14328 days ago · 11 km deep · 45 km away
  20. 1.98 km WSW of Cobb, California · 14328 days ago · 4 km deep · 5 km away
  21. 1.66 km WSW of Cobb, California · 14327 days ago · 0 km deep · 4 km away
  22. 2.59 km NW of Stonyford, California · 14327 days ago · 6 km deep · 67 km away
  23. 1.810 km N of Cloverdale, California · 14327 days ago · 2 km deep · 22 km away
  24. 1.83 km NNW of Cloverdale, California · 14327 days ago · 0 km deep · 23 km away
  25. 1.95 km SW of Cobb, California · 14327 days ago · 0 km deep · 4 km away
  26. 1.58 km WSW of Cobb, California · 14326 days ago · 0 km deep · 4 km away
  27. 2.06 km WSW of Cobb, California · 14326 days ago · 0 km deep · 4 km away
  28. 1.85 km WNW of Cobb, California · 14326 days ago · 1 km deep · 1 km away
  29. 2.47 km WSW of Cobb, California · 14325 days ago · 1 km deep · 4 km away
  30. 1.95 km SW of Cobb, California · 14325 days ago · 0 km deep · 5 km away
  31. 1.55 km W of Cobb, California · 14325 days ago · 0 km deep · 2 km away
  32. 1.55 km W of Cobb, California · 14325 days ago · 0 km deep · 2 km away
  33. 1.59 km W of Cobb, California · 14325 days ago · 1 km deep · 5 km away
  34. 1.79 km ESE of Willits, California · 14325 days ago · 3 km deep · 73 km away
  35. 1.92 km N of Larkfield-Wikiup, California · 14325 days ago · 5 km deep · 33 km away
  36. 1.84 km W of Cobb, California · 14324 days ago · 2 km deep · 0 km away
  37. 3.05 km SW of Cobb, California · 14324 days ago · 0 km deep · 4 km away
  38. 2.15 km SW of Cobb, California · 14324 days ago · 0 km deep · 4 km away
  39. 2.54 km W of Cobb, California · 14324 days ago · 0 km deep · 1 km away
  40. 1.6Northern California · 14324 days ago · -1 km deep · 5 km away
  41. 1.65 km W of Cobb, California · 14323 days ago · 0 km deep · 1 km away
  42. 2.05 km NE of Penngrove, California · 14322 days ago · 4 km deep · 56 km away
  43. 1.711 km E of Calpella, California · 14322 days ago · 1 km deep · 51 km away
  44. 2.48 km WSW of Cobb, California · 14322 days ago · 2 km deep · 5 km away
  45. 1.68 km W of Cobb, California · 14321 days ago · 1 km deep · 4 km away
  46. 2.03 km SW of Cobb, California · 14321 days ago · 2 km deep · 4 km away
  47. 1.94 km W of Cobb, California · 14321 days ago · 0 km deep · 1 km away
  48. 1.69 km WSW of Cobb, California · 14321 days ago · 1 km deep · 6 km away
  49. 1.85 km SW of Cobb, California · 14321 days ago · 0 km deep · 4 km away
  50. 1.94 km WSW of Cobb, California · 14320 days ago · 1 km deep · 3 km away
  51. 1.74 km SSW of Cobb, California · 14320 days ago · 1 km deep · 5 km away
  52. 2.06 km W of Cobb, California · 14320 days ago · 4 km deep · 3 km away
  53. 1.96 km WSW of Cobb, California · 14319 days ago · 4 km deep · 3 km away
  54. 1.912 km WSW of Hopland, California · 14319 days ago · 1 km deep · 42 km away
  55. 2.17 km WSW of Cobb, California · 14318 days ago · 0 km deep · 4 km away
  56. 2.19 km WSW of Cobb, California · 14318 days ago · 1 km deep · 6 km away
  57. 2.08 km W of Cobb, California · 14318 days ago · 0 km deep · 4 km away
  58. 2.19 km WSW of Cobb, California · 14318 days ago · 2 km deep · 6 km away
  59. 1.99 km NNE of Brooktrails, California · 14317 days ago · 9 km deep · 91 km away
  60. 1.54 km SW of Cobb, California · 14317 days ago · 0 km deep · 4 km away

The first 60 of 171.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1150404. Read Tue, Sep 22, 2026, 9:38 PM UTC.