California earthquakes

M1.7 earthquake 6 km W of Cobb, California

A magnitude 1.7 earthquake struck 6 km W of Cobb, California on Wed, Mar 25, 1987, 2:09 AM PST (10:09 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.4 5 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.7 (md), micro
Local time
UTC
1987-03-25 10:09:58 UTC
Depth
1.4 km (0.9 mi), shallow
Epicenter
38.812° N, 122.796° 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 1.3 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
247°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 173 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.68 km WSW of Cobb, California · 14413 days ago · 3 km deep · 3 km away
  2. 1.65 km SW of Cobb, California · 14413 days ago · 0 km deep · 4 km away
  3. 1.611 km S of Kelseyville, California · 14412 days ago · 0 km deep · 9 km away
  4. 2.45 km WNW of Cobb, California · 14412 days ago · 1 km deep · 3 km away
  5. 1.8Northern California · 14412 days ago · 6 km deep · 27 km away
  6. 2.96 km ENE of Willits, California · 14411 days ago · 4 km deep · 81 km away
  7. 1.76 km ENE of Willits, California · 14411 days ago · 3 km deep · 81 km away
  8. 1.56 km ENE of Willits, California · 14411 days ago · 4 km deep · 81 km away
  9. 2.86 km ENE of Willits, California · 14411 days ago · 3 km deep · 81 km away
  10. 2.56 km ENE of Willits, California · 14411 days ago · 3 km deep · 80 km away
  11. 2.36 km ENE of Willits, California · 14411 days ago · 3 km deep · 81 km away
  12. 1.76 km ENE of Willits, California · 14411 days ago · 3 km deep · 81 km away
  13. 1.83 km SW of Cobb, California · 14411 days ago · 0 km deep · 4 km away
  14. 1.720 km ENE of Potter Valley, California · 14411 days ago · 7 km deep · 66 km away
  15. 1.67 km ENE of Talmage, California · 14410 days ago · 4 km deep · 46 km away
  16. 1.64 km WSW of Cobb, California · 14410 days ago · 2 km deep · 2 km away
  17. 2.66 km W of Cobb, California · 14409 days ago · 3 km deep · 1 km away
  18. 2.47 km W of Cobb, California · 14409 days ago · 1 km deep · 3 km away
  19. 1.95 km W of Cobb, California · 14408 days ago · 1 km deep · 1 km away
  20. 2.16 km W of Cobb, California · 14408 days ago · 4 km deep · 2 km away
  21. 1.9Northern California · 14408 days ago · 0 km deep · 1 km away
  22. 1.86 km W of Cobb, California · 14408 days ago · 3 km deep · 1 km away
  23. 1.62 km ESE of Calpella, California · 14407 days ago · 5 km deep · 57 km away
  24. 1.97 km W of Cobb, California · 14407 days ago · 4 km deep · 1 km away
  25. 1.87 km W of Cobb, California · 14407 days ago · 4 km deep · 1 km away
  26. 2.06 km SW of Cobb, California · 14406 days ago · 3 km deep · 3 km away
  27. 1.67 km W of Cobb, California · 14406 days ago · 3 km deep · 1 km away
  28. 1.65 km SW of Cobb, California · 14406 days ago · 0 km deep · 4 km away
  29. 1.66 km W of Cobb, California · 14405 days ago · 2 km deep · 2 km away
  30. 1.87 km WSW of Cobb, California · 14405 days ago · 1 km deep · 1 km away
  31. 1.95 km SSW of Cobb, California · 14405 days ago · 0 km deep · 5 km away
  32. 1.67 km W of Cobb, California · 14405 days ago · 1 km deep · 3 km away
  33. 1.83 km W of Cobb, California · 14405 days ago · 1 km deep · 3 km away
  34. 1.86 km SW of Cobb, California · 14405 days ago · 2 km deep · 3 km away
  35. 2.16 km W of Cobb, California · 14405 days ago · 3 km deep · 1 km away
  36. 2.14 km SW of Cobb, California · 14404 days ago · 0 km deep · 4 km away
  37. 2.25 km W of Cobb, California · 14404 days ago · 1 km deep · 2 km away
  38. 1.65 km SW of Cobb, California · 14404 days ago · -1 km deep · 5 km away
  39. 1.54 km SW of Cobb, California · 14404 days ago · 0 km deep · 4 km away
  40. 1.79 km WNW of Cobb, California · 14403 days ago · 1 km deep · 5 km away
  41. 1.76 km W of Cobb, California · 14402 days ago · 2 km deep · 2 km away
  42. 1.64 km SW of Cobb, California · 14402 days ago · 0 km deep · 4 km away
  43. 2.35 km SW of Cobb, California · 14402 days ago · 1 km deep · 3 km away
  44. 1.513 km NNE of Angwin, California · 14401 days ago · 4 km deep · 38 km away
  45. 1.76 km WSW of Cobb, California · 14400 days ago · 4 km deep · 1 km away
  46. 2.27 km WSW of Cobb, California · 14400 days ago · 1 km deep · 2 km away
  47. 2.38 km WSW of Cobb, California · 14400 days ago · 1 km deep · 2 km away
  48. 2.86 km W of Cobb, California · 14400 days ago · 2 km deep · 2 km away
  49. 2.17 km W of Cobb, California · 14399 days ago · 3 km deep · 1 km away
  50. 1.512 km NE of Lucerne, California · 14399 days ago · 13 km deep · 42 km away
  51. 1.811 km NNE of Geyserville, California · 14399 days ago · 3 km deep · 5 km away
  52. 1.77 km W of Cobb, California · 14399 days ago · 3 km deep · 1 km away
  53. 1.76 km W of Cobb, California · 14399 days ago · 4 km deep · 1 km away
  54. 1.84 km W of Moskowite Corner, California · 14398 days ago · 7 km deep · 64 km away
  55. 1.76 km WSW of Cobb, California · 14398 days ago · 1 km deep · 1 km away
  56. 1.87 km W of Cobb, California · 14397 days ago · 3 km deep · 1 km away
  57. 1.74 km SSW of Cobb, California · 14397 days ago · -1 km deep · 5 km away
  58. 2.15 km WNW of Cobb, California · 14397 days ago · 0 km deep · 2 km away
  59. 1.65 km W of Cobb, California · 14396 days ago · 1 km deep · 2 km away
  60. 1.65 km W of Cobb, California · 14396 days ago · -1 km deep · 2 km away

The first 60 of 173.

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1148518. Read Tue, Sep 22, 2026, 5:15 PM UTC.