California earthquakes

M2.2 earthquake 4 km WSW of Cobb, California

A magnitude 2.2 earthquake struck 4 km WSW of Cobb, California on Sun, Jun 28, 1987, 12:50 AM PDT (07:50 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.2 23 km NE of Potter Valley, 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
2.2 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-06-28 07:50:14 UTC
Depth
0.4 km (0.3 mi), shallow
Epicenter
38.799° N, 122.769° 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, 0.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
64°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 170 in the 60 days after this one and 117 in the 30 days before it.

After

  1. 1.94 km W of Cobb, California · 14341 days ago · 0 km deep · 3 km away
  2. 2.05 km W of Cobb, California · 14341 days ago · -1 km deep · 3 km away
  3. 1.66 km WSW of Cobb, California · 14340 days ago · 0 km deep · 2 km away
  4. 1.66 km W of Cobb, California · 14340 days ago · 3 km deep · 3 km away
  5. 2.55 km SW of Cobb, California · 14340 days ago · 2 km deep · 1 km away
  6. 2.35 km WSW of Cobb, California · 14340 days ago · 3 km deep · 2 km away
  7. 3.223 km NE of Potter Valley, California · 14339 days ago · 9 km deep · 79 km away
  8. 1.59 km SSE of Boonville, California · 14339 days ago · 3 km deep · 50 km away
  9. 1.87 km W of Cobb, California · 14338 days ago · -1 km deep · 4 km away
  10. 2.711 km N of Cloverdale, California · 14338 days ago · 5 km deep · 23 km away
  11. 2.39 km WSW of Cobb, California · 14338 days ago · 2 km deep · 5 km away
  12. 1.88 km WSW of Cobb, California · 14338 days ago · 1 km deep · 4 km away
  13. 1.76 km WNW of Kenwood, California · 14338 days ago · 11 km deep · 42 km away
  14. 1.98 km WSW of Cobb, California · 14337 days ago · 4 km deep · 4 km away
  15. 1.66 km WSW of Cobb, California · 14337 days ago · 0 km deep · 1 km away
  16. 2.59 km NW of Stonyford, California · 14337 days ago · 6 km deep · 70 km away
  17. 1.810 km N of Cloverdale, California · 14337 days ago · 2 km deep · 23 km away
  18. 1.83 km NNW of Cloverdale, California · 14337 days ago · 0 km deep · 23 km away
  19. 1.95 km SW of Cobb, California · 14336 days ago · 0 km deep · 1 km away
  20. 1.58 km WSW of Cobb, California · 14336 days ago · 0 km deep · 4 km away
  21. 2.06 km WSW of Cobb, California · 14336 days ago · 0 km deep · 2 km away
  22. 1.85 km WNW of Cobb, California · 14336 days ago · 1 km deep · 4 km away
  23. 2.47 km WSW of Cobb, California · 14335 days ago · 1 km deep · 3 km away
  24. 1.95 km SW of Cobb, California · 14335 days ago · 0 km deep · 2 km away
  25. 1.55 km W of Cobb, California · 14335 days ago · 0 km deep · 2 km away
  26. 1.55 km W of Cobb, California · 14335 days ago · 0 km deep · 2 km away
  27. 1.59 km W of Cobb, California · 14334 days ago · 1 km deep · 5 km away
  28. 1.79 km ESE of Willits, California · 14334 days ago · 3 km deep · 76 km away
  29. 1.92 km N of Larkfield-Wikiup, California · 14334 days ago · 5 km deep · 30 km away
  30. 1.84 km W of Cobb, California · 14334 days ago · 2 km deep · 3 km away
  31. 3.05 km SW of Cobb, California · 14334 days ago · 0 km deep · 1 km away
  32. 2.15 km SW of Cobb, California · 14334 days ago · 0 km deep · 1 km away
  33. 2.54 km W of Cobb, California · 14333 days ago · 0 km deep · 3 km away
  34. 1.6Northern California · 14333 days ago · -1 km deep · 2 km away
  35. 1.65 km W of Cobb, California · 14333 days ago · 0 km deep · 2 km away
  36. 2.05 km NE of Penngrove, California · 14332 days ago · 4 km deep · 53 km away
  37. 1.711 km E of Calpella, California · 14332 days ago · 1 km deep · 53 km away
  38. 2.48 km WSW of Cobb, California · 14331 days ago · 2 km deep · 3 km away
  39. 1.68 km W of Cobb, California · 14331 days ago · 1 km deep · 5 km away
  40. 2.03 km SW of Cobb, California · 14331 days ago · 2 km deep · 2 km away
  41. 1.94 km W of Cobb, California · 14331 days ago · 0 km deep · 3 km away
  42. 1.69 km WSW of Cobb, California · 14331 days ago · 1 km deep · 5 km away
  43. 1.85 km SW of Cobb, California · 14331 days ago · 0 km deep · 1 km away
  44. 1.94 km WSW of Cobb, California · 14330 days ago · 1 km deep · 1 km away
  45. 1.74 km SSW of Cobb, California · 14330 days ago · 1 km deep · 2 km away
  46. 2.06 km W of Cobb, California · 14330 days ago · 4 km deep · 4 km away
  47. 1.96 km WSW of Cobb, California · 14329 days ago · 4 km deep · 2 km away
  48. 1.912 km WSW of Hopland, California · 14329 days ago · 1 km deep · 43 km away
  49. 2.17 km WSW of Cobb, California · 14328 days ago · 0 km deep · 3 km away
  50. 2.19 km WSW of Cobb, California · 14328 days ago · 1 km deep · 6 km away
  51. 2.08 km W of Cobb, California · 14327 days ago · 0 km deep · 5 km away
  52. 2.19 km WSW of Cobb, California · 14327 days ago · 2 km deep · 5 km away
  53. 1.99 km NNE of Brooktrails, California · 14326 days ago · 9 km deep · 94 km away
  54. 1.54 km SW of Cobb, California · 14326 days ago · 0 km deep · 1 km away
  55. 2.16 km WSW of Cobb, California · 14326 days ago · 3 km deep · 3 km away
  56. 1.93 km NNW of Cloverdale, California · 14326 days ago · -1 km deep · 23 km away
  57. 1.86 km W of Cobb, California · 14326 days ago · -1 km deep · 3 km away
  58. 1.73 km W of Cobb, California · 14325 days ago · -1 km deep · 2 km away
  59. 2.06 km W of Cobb, California · 14325 days ago · 3 km deep · 3 km away
  60. 1.84 km W of Cobb, California · 14325 days ago · 0 km deep · 3 km away

The first 60 of 170.

Before

  1. 1.86 km W of Cobb, California · 14342 days ago · 3 km deep · 3 km away
  2. 1.55 km W of Cobb, California · 14342 days ago · 1 km deep · 3 km away
  3. 1.66 km W of Cobb, California · 14342 days ago · 3 km deep · 3 km away
  4. 2.87 km WNW of Cobb, California · 14343 days ago · -1 km deep · 5 km away
  5. 2.46 km WNW of Cobb, California · 14343 days ago · 0 km deep · 5 km away
  6. 1.66 km WSW of Cobb, California · 14343 days ago · 3 km deep · 2 km away
  7. 1.68 km NW of Redwood Valley, California · 14343 days ago · 3 km deep · 72 km away
  8. 1.68 km W of Cobb, California · 14343 days ago · 1 km deep · 4 km away
  9. 1.84 km WSW of Cobb, California · 14344 days ago · 1 km deep · 0 km away
  10. 1.65 km WSW of Cobb, California · 14344 days ago · 1 km deep · 1 km away
  11. 1.55 km SW of Cobb, California · 14344 days ago · 0 km deep · 2 km away
  12. 1.67 km E of Willits, California · 14344 days ago · 8 km deep · 81 km away
  13. 1.53 km N of Cloverdale, California · 14345 days ago · 0 km deep · 22 km away
  14. 1.54 km WSW of Cobb, California · 14345 days ago · 2 km deep · 0 km away
  15. 1.54 km ENE of Calpella, California · 14345 days ago · 5 km deep · 60 km away
  16. 2.2near the coast of Northern California · 14345 days ago · 2 km deep · 60 km away
  17. 1.54 km ENE of Calpella, California · 14345 days ago · 5 km deep · 60 km away
  18. 1.73 km ENE of Calpella, California · 14345 days ago · 2 km deep · 60 km away
  19. 2.15 km W of Cobb, California · 14345 days ago · 1 km deep · 3 km away
  20. 1.810 km SE of Boonville, California · 14345 days ago · 1 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1150752. Read Fri, Oct 2, 2026, 12:46 PM UTC.