California earthquakes

M1.6 earthquake 6 km SW of Cobb, California

A magnitude 1.6 earthquake struck 6 km SW of Cobb, California on Thu, Oct 15, 1987, 8:07 AM PDT (15:07 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.2 5 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.

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The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1987-10-15 15:07:04 UTC
Depth
0.4 km (0.3 mi), shallow
Epicenter
38.782° N, 122.772° 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, 1.6 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
83°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 166 in the 60 days after this one and 93 in the 30 days before it.

After

  1. 2.18 km WSW of Cobb, California · 14228 days ago · 0 km deep · 4 km away
  2. 2.510 km E of Cloverdale, California · 14227 days ago · 5 km deep · 11 km away
  3. 1.55 km SSW of Cobb, California · 14227 days ago · 1 km deep · 2 km away
  4. 1.86 km W of Cobb, California · 14227 days ago · 3 km deep · 5 km away
  5. 1.64 km W of Cobb, California · 14226 days ago · 0 km deep · 4 km away
  6. 2.427 km NNE of Potter Valley, California · 14226 days ago · 10 km deep · 84 km away
  7. 1.76 km WSW of Cobb, California · 14226 days ago · 3 km deep · 4 km away
  8. 1.65 km SW of Cobb, California · 14225 days ago · -1 km deep · 1 km away
  9. 2.27 km WSW of Cobb, California · 14225 days ago · 3 km deep · 4 km away
  10. 1.56 km WNW of Cobb, California · 14225 days ago · -1 km deep · 6 km away
  11. 1.79 km WSW of Cobb, California · 14225 days ago · 2 km deep · 5 km away
  12. 1.74 km WSW of Cobb, California · 14225 days ago · -1 km deep · 3 km away
  13. 2.96 km WSW of Cobb, California · 14224 days ago · 1 km deep · 4 km away
  14. 2.16 km WSW of Cobb, California · 14224 days ago · 3 km deep · 4 km away
  15. 1.96 km WSW of Cobb, California · 14223 days ago · 3 km deep · 4 km away
  16. 1.75 km E of Lower Lake, California · 14222 days ago · 8 km deep · 24 km away
  17. 2.54 km WSW of Cobb, California · 14222 days ago · 1 km deep · 3 km away
  18. 1.65 km W of Cobb, California · 14222 days ago · 0 km deep · 4 km away
  19. 2.05 km W of Cobb, California · 14221 days ago · 1 km deep · 6 km away
  20. 1.68 km WSW of Cobb, California · 14221 days ago · 1 km deep · 4 km away
  21. 1.78 km W of Cobb, California · 14221 days ago · -1 km deep · 6 km away
  22. 2.03 km SSE of Philo, California · 14221 days ago · 5 km deep · 64 km away
  23. 2.34 km NNE of Hopland, California · 14221 days ago · 3 km deep · 37 km away
  24. 2.03 km NW of Santa Rosa, California · 14220 days ago · 7 km deep · 35 km away
  25. 2.08 km W of Cobb, California · 14220 days ago · 1 km deep · 7 km away
  26. 1.88 km WSW of Upper Lake, California · 14220 days ago · 8 km deep · 44 km away
  27. 1.87 km WSW of Cobb, California · 14219 days ago · 3 km deep · 4 km away
  28. 2.77 km W of Cobb, California · 14219 days ago · -1 km deep · 5 km away
  29. 1.66 km W of Cobb, California · 14219 days ago · -1 km deep · 5 km away
  30. 1.69 km WNW of Cobb, California · 14218 days ago · 2 km deep · 9 km away
  31. 2.06 km W of Cobb, California · 14218 days ago · 2 km deep · 5 km away
  32. 1.54 km NNE of Clearlake, California · 14218 days ago · -1 km deep · 27 km away
  33. 2.05 km WNW of Cobb, California · 14218 days ago · 3 km deep · 7 km away
  34. 1.95 km SW of Cobb, California · 14218 days ago · 0 km deep · 1 km away
  35. 2.15 km SW of Cobb, California · 14218 days ago · 3 km deep · 1 km away
  36. 1.513 km ESE of Hidden Valley Lake, California · 14218 days ago · 3 km deep · 31 km away
  37. 2.312 km ESE of Hidden Valley Lake, California · 14218 days ago · 6 km deep · 30 km away
  38. 2.412 km ESE of Hidden Valley Lake, California · 14218 days ago · 6 km deep · 29 km away
  39. 2.45 km WSW of Cobb, California · 14217 days ago · 0 km deep · 2 km away
  40. 1.63 km NNW of Cloverdale, California · 14217 days ago · -1 km deep · 23 km away
  41. 2.321 km NE of Potter Valley, California · 14216 days ago · 11 km deep · 77 km away
  42. 1.9Northern California · 14216 days ago · 7 km deep · 28 km away
  43. 1.66 km WNW of Cobb, California · 14216 days ago · -1 km deep · 6 km away
  44. 1.75 km WNW of Cobb, California · 14215 days ago · 0 km deep · 7 km away
  45. 1.98 km WSW of Cobb, California · 14214 days ago · 2 km deep · 5 km away
  46. 1.922 km NE of Potter Valley, California · 14214 days ago · 11 km deep · 77 km away
  47. 1.56 km W of Cobb, California · 14214 days ago · -1 km deep · 5 km away
  48. 1.86 km W of Cobb, California · 14213 days ago · 1 km deep · 6 km away
  49. 1.66 km SW of Cobb, California · 14213 days ago · 1 km deep · 1 km away
  50. 1.57 km WSW of Cobb, California · 14213 days ago · 3 km deep · 4 km away
  51. 1.79 km W of Cobb, California · 14212 days ago · 1 km deep · 7 km away
  52. 2.67 km WSW of Cobb, California · 14212 days ago · 1 km deep · 4 km away
  53. 1.79 km WSW of Cobb, California · 14212 days ago · 2 km deep · 5 km away
  54. 1.76 km W of Cobb, California · 14212 days ago · -1 km deep · 5 km away
  55. 1.67 km W of Cobb, California · 14212 days ago · -1 km deep · 5 km away
  56. 1.67 km W of Cobb, California · 14212 days ago · 1 km deep · 5 km away
  57. 2.46 km W of Cobb, California · 14212 days ago · 1 km deep · 5 km away
  58. 1.65 km WSW of Cobb, California · 14212 days ago · 1 km deep · 2 km away
  59. 1.85 km WSW of Cobb, California · 14212 days ago · 0 km deep · 2 km away
  60. 3.17 km WNW of Cobb, California · 14212 days ago · -1 km deep · 7 km away

The first 60 of 166.

Before

  1. 1.716 km N of Upper Lake, California · 14228 days ago · 7 km deep · 59 km away
  2. 1.64 km WSW of Cobb, California · 14228 days ago · 1 km deep · 2 km away
  3. 1.74 km WSW of Cobb, California · 14228 days ago · 1 km deep · 2 km away
  4. 2.64 km WSW of Cobb, California · 14228 days ago · 2 km deep · 2 km away
  5. 1.66 km WSW of Cobb, California · 14228 days ago · -1 km deep · 2 km away
  6. 2.04 km SSE of Napa, California · 14229 days ago · 12 km deep · 72 km away
  7. 1.913 km SSW of Willits, California · 14229 days ago · 3 km deep · 82 km away
  8. 1.54 km W of Cobb, California · 14230 days ago · -1 km deep · 4 km away
  9. 2.28 km WSW of Cobb, California · 14230 days ago · 0 km deep · 4 km away
  10. 2.24 km S of Cobb, California · 14231 days ago · 2 km deep · 5 km away
  11. 1.66 km SW of Cobb, California · 14231 days ago · 0 km deep · 0 km away
  12. 1.68 km W of Cobb, California · 14231 days ago · 3 km deep · 5 km away
  13. 2.55 km W of Cobb, California · 14231 days ago · 2 km deep · 5 km away
  14. 1.85 km W of Cobb, California · 14231 days ago · 2 km deep · 5 km away
  15. 1.66 km W of Cobb, California · 14231 days ago · 3 km deep · 5 km away
  16. 1.96 km W of Cobb, California · 14232 days ago · 3 km deep · 5 km away
  17. 2.37 km NNE of Hopland, California · 14232 days ago · 1 km deep · 38 km away
  18. 2.3Northern California · 14232 days ago · 1 km deep · 6 km away
  19. 1.59 km WSW of Cobb, California · 14233 days ago · 1 km deep · 5 km away
  20. 1.94 km NW of Philo, California · 14233 days ago · -1 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1153213. Read Mon, Sep 28, 2026, 1:23 PM UTC.