California earthquakes

M1.6 earthquake 4 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 4 km WSW of Cobb, California on Mon, Aug 10, 1987, 10:01 AM PDT (17:01 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.4 4 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-08-10 17:01:40 UTC
Depth
1.2 km (0.7 mi), shallow
Epicenter
38.800° N, 122.770° 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, 0.7 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
78°
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 167 in the 60 days after this one and 107 in the 30 days before it.

After

  1. 1.66 km W of Cobb, California · 14298 days ago · 3 km deep · 3 km away
  2. 1.86 km SW of Cobb, California · 14298 days ago · 1 km deep · 2 km away
  3. 1.86 km SW of Cobb, California · 14298 days ago · 1 km deep · 2 km away
  4. 1.75 km W of Cobb, California · 14298 days ago · -1 km deep · 4 km away
  5. 1.67 km W of Cobb, California · 14297 days ago · 1 km deep · 4 km away
  6. 1.86 km SW of Cobb, California · 14296 days ago · 0 km deep · 2 km away
  7. 2.010 km SE of Willits, California · 14296 days ago · 0 km deep · 74 km away
  8. 1.86 km WSW of Cobb, California · 14296 days ago · 0 km deep · 2 km away
  9. 1.86 km WSW of Cobb, California · 14296 days ago · 1 km deep · 2 km away
  10. 1.66 km W of Cobb, California · 14296 days ago · 2 km deep · 4 km away
  11. 1.83 km N of Cloverdale, California · 14296 days ago · 0 km deep · 22 km away
  12. 1.66 km SW of Cobb, California · 14296 days ago · 0 km deep · 2 km away
  13. 1.57 km WSW of Cobb, California · 14295 days ago · 3 km deep · 3 km away
  14. 1.87 km WSW of Cobb, California · 14295 days ago · 1 km deep · 3 km away
  15. 1.79 km SE of Boonville, California · 14295 days ago · 7 km deep · 47 km away
  16. 1.56 km W of Cobb, California · 14295 days ago · 2 km deep · 3 km away
  17. 1.55 km WNW of Cobb, California · 14295 days ago · 1 km deep · 4 km away
  18. 1.74 km W of Cobb, California · 14294 days ago · 1 km deep · 2 km away
  19. 2.27 km W of Cobb, California · 14294 days ago · 4 km deep · 4 km away
  20. 1.84 km SW of Cobb, California · 14294 days ago · 0 km deep · 1 km away
  21. 1.87 km W of Cobb, California · 14294 days ago · 1 km deep · 5 km away
  22. 1.87 km WSW of Cobb, California · 14293 days ago · 2 km deep · 3 km away
  23. 1.97 km WSW of Cobb, California · 14293 days ago · 1 km deep · 3 km away
  24. 1.72 km SSW of Clearlake, California · 14292 days ago · 3 km deep · 19 km away
  25. 1.8Northern California · 14292 days ago · 1 km deep · 5 km away
  26. 1.59 km ESE of Hidden Valley Lake, California · 14292 days ago · 5 km deep · 27 km away
  27. 1.91 km W of Green Valley, California · 14292 days ago · 10 km deep · 80 km away
  28. 2.15 km SW of Cobb, California · 14291 days ago · 2 km deep · 1 km away
  29. 2.06 km W of Cobb, California · 14291 days ago · 4 km deep · 4 km away
  30. 1.65 km W of Cobb, California · 14291 days ago · 1 km deep · 4 km away
  31. 1.63 km NNW of Cloverdale, California · 14291 days ago · -1 km deep · 23 km away
  32. 1.75 km WSW of Cobb, California · 14291 days ago · 0 km deep · 1 km away
  33. 1.811 km SSW of Cloverdale, California · 14290 days ago · 4 km deep · 29 km away
  34. 1.64 km SW of Cobb, California · 14290 days ago · 0 km deep · 2 km away
  35. 2.58 km W of Cobb, California · 14289 days ago · 0 km deep · 5 km away
  36. 2.110 km ENE of Lucerne, California · 14289 days ago · 24 km deep · 38 km away
  37. 2.67 km W of Cobb, California · 14289 days ago · 3 km deep · 4 km away
  38. 2.16 km W of Cobb, California · 14289 days ago · 3 km deep · 4 km away
  39. 1.63 km NNW of Cloverdale, California · 14288 days ago · 2 km deep · 23 km away
  40. 1.96 km W of Cobb, California · 14288 days ago · -1 km deep · 4 km away
  41. 1.86 km W of Cobb, California · 14288 days ago · 0 km deep · 4 km away
  42. 1.96 km W of Cobb, California · 14288 days ago · 0 km deep · 4 km away
  43. 1.66 km W of Cobb, California · 14287 days ago · 1 km deep · 4 km away
  44. 1.75 km W of Cobb, California · 14287 days ago · 0 km deep · 4 km away
  45. 1.86 km W of Cobb, California · 14286 days ago · 3 km deep · 3 km away
  46. 2.16 km W of Cobb, California · 14286 days ago · 3 km deep · 3 km away
  47. 1.65 km WNW of Cobb, California · 14286 days ago · 1 km deep · 4 km away
  48. 2.9Northern California · 14286 days ago · 2 km deep · 8 km away
  49. 2.27 km WSW of Cobb, California · 14286 days ago · 0 km deep · 3 km away
  50. 1.87 km W of Cobb, California · 14285 days ago · 3 km deep · 4 km away
  51. 2.06 km WSW of Cobb, California · 14285 days ago · 1 km deep · 2 km away
  52. 2.14 km W of Cobb, California · 14285 days ago · 1 km deep · 3 km away
  53. 2.06 km WSW of Cobb, California · 14285 days ago · 1 km deep · 2 km away
  54. 1.711 km WNW of Redwood Valley, California · 14285 days ago · 6 km deep · 74 km away
  55. 2.17 km WSW of Cobb, California · 14285 days ago · 1 km deep · 4 km away
  56. 2.67 km W of Cobb, California · 14285 days ago · 0 km deep · 5 km away
  57. 1.88 km NW of Redwood Valley, California · 14284 days ago · 2 km deep · 72 km away
  58. 1.611 km N of Brooktrails, California · 14284 days ago · 6 km deep · 99 km away
  59. 1.64 km S of Cobb, California · 14284 days ago · -1 km deep · 4 km away
  60. 2.45 km SW of Cobb, California · 14283 days ago · 0 km deep · 2 km away

The first 60 of 167.

Before

  1. 1.65 km W of Cobb, California · 14298 days ago · 0 km deep · 3 km away
  2. 1.65 km W of Cobb, California · 14298 days ago · 0 km deep · 3 km away
  3. 1.78 km W of Cobb, California · 14299 days ago · 1 km deep · 4 km away
  4. 1.86 km WSW of Cobb, California · 14299 days ago · 3 km deep · 3 km away
  5. 1.66 km W of Cobb, California · 14300 days ago · 3 km deep · 3 km away
  6. 2.05 km WSW of Cobb, California · 14301 days ago · -1 km deep · 2 km away
  7. 2.35 km WSW of Cobb, California · 14302 days ago · 0 km deep · 1 km away
  8. 1.59 km W of Cobb, California · 14302 days ago · 1 km deep · 6 km away
  9. 1.75 km WSW of Cobb, California · 14302 days ago · 1 km deep · 1 km away
  10. 1.64 km WSW of Cobb, California · 14302 days ago · 1 km deep · 1 km away
  11. 1.64 km WSW of Cobb, California · 14302 days ago · 1 km deep · 1 km away
  12. 2.14 km WSW of Cobb, California · 14303 days ago · 1 km deep · 0 km away
  13. 1.95 km W of Cobb, California · 14303 days ago · 1 km deep · 3 km away
  14. 1.76 km WSW of Cobb, California · 14304 days ago · -1 km deep · 2 km away
  15. 2.05 km WSW of Cobb, California · 14305 days ago · 1 km deep · 1 km away
  16. 2.06 km WSW of Cobb, California · 14305 days ago · 3 km deep · 2 km away
  17. 1.73 km W of Cobb, California · 14305 days ago · 0 km deep · 3 km away
  18. 2.05 km W of Cobb, California · 14306 days ago · 1 km deep · 3 km away
  19. 1.85 km WNW of Cobb, California · 14306 days ago · 3 km deep · 5 km away
  20. 1.66 km SW of Glen Ellen, California · 14306 days ago · 8 km deep · 55 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1151900. Read Fri, Oct 2, 2026, 8:06 PM UTC.