California earthquakes

M1.9 earthquake 5 km WSW of Cobb, California

A magnitude 1.9 earthquake struck 5 km WSW of Cobb, California on Sun, Mar 1, 1987, 8:57 PM PST (04:57 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.4 Northern 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
1.9 (md), micro
Local time
UTC
1987-03-02 04:57:43 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
38.804° N, 122.776° 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
±0.12
Depth from
From location
Station coverage gap
63°
Stations used
16

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. 2.4Northern California · 14436 days ago · 3 km deep · 4 km away
  2. 2.47 km WSW of Cobb, California · 14436 days ago · 1 km deep · 3 km away
  3. 2.26 km W of Cobb, California · 14436 days ago · 2 km deep · 3 km away
  4. 1.99 km W of Cobb, California · 14435 days ago · 1 km deep · 5 km away
  5. 1.66 km W of Cobb, California · 14435 days ago · 3 km deep · 3 km away
  6. 1.64 km SW of Cobb, California · 14434 days ago · 0 km deep · 1 km away
  7. 1.88 km S of Cobb, California · 14434 days ago · -1 km deep · 8 km away
  8. 2.85 km SW of Cobb, California · 14434 days ago · 0 km deep · 3 km away
  9. 2.06 km WSW of Cobb, California · 14434 days ago · 4 km deep · 2 km away
  10. 1.84 km W of Cobb, California · 14433 days ago · 1 km deep · 3 km away
  11. 1.94 km WSW of Cobb, California · 14433 days ago · -1 km deep · 0 km away
  12. 1.65 km SW of Cobb, California · 14433 days ago · 2 km deep · 2 km away
  13. 1.69 km SSW of Cloverdale, California · 14433 days ago · 7 km deep · 27 km away
  14. 2.06 km W of Cobb, California · 14432 days ago · 3 km deep · 3 km away
  15. 2.26 km W of Cobb, California · 14432 days ago · 4 km deep · 2 km away
  16. 1.76 km W of Cobb, California · 14432 days ago · 3 km deep · 2 km away
  17. 1.67 km W of Cobb, California · 14432 days ago · 0 km deep · 3 km away
  18. 3.07 km W of Cobb, California · 14431 days ago · 4 km deep · 4 km away
  19. 2.33 km ENE of Anchor Bay, California · 14431 days ago · 11 km deep · 67 km away
  20. 1.56 km NE of Geyserville, California · 14430 days ago · 5 km deep · 9 km away
  21. 1.85 km WSW of Cobb, California · 14430 days ago · 2 km deep · 1 km away
  22. 2.66 km W of Cobb, California · 14430 days ago · 4 km deep · 2 km away
  23. 1.69 km W of Cobb, California · 14429 days ago · 8 km deep · 5 km away
  24. 1.58 km WSW of Cobb, California · 14429 days ago · 11 km deep · 4 km away
  25. 1.66 km SW of Cobb, California · 14429 days ago · 1 km deep · 2 km away
  26. 1.55 km SW of Cobb, California · 14429 days ago · 1 km deep · 2 km away
  27. 1.65 km SW of Cobb, California · 14428 days ago · 3 km deep · 2 km away
  28. 1.65 km W of Cobb, California · 14428 days ago · 1 km deep · 3 km away
  29. 2.16 km SW of Cobb, California · 14428 days ago · 0 km deep · 2 km away
  30. 1.610 km W of Cobb, California · 14428 days ago · 4 km deep · 7 km away
  31. 3.17 km WSW of Cobb, California · 14428 days ago · 1 km deep · 2 km away
  32. 1.74 km W of Cobb, California · 14428 days ago · 0 km deep · 2 km away
  33. 2.37 km WSW of Cobb, California · 14427 days ago · 1 km deep · 2 km away
  34. 1.88 km W of Cobb, California · 14426 days ago · 3 km deep · 5 km away
  35. 2.08 km W of Cobb, California · 14426 days ago · 2 km deep · 5 km away
  36. 1.76 km W of Cobb, California · 14426 days ago · 1 km deep · 2 km away
  37. 1.66 km W of Cobb, California · 14426 days ago · 3 km deep · 3 km away
  38. 1.75 km WNW of Cobb, California · 14425 days ago · 1 km deep · 4 km away
  39. 1.89 km ESE of Hidden Valley Lake, California · 14425 days ago · 5 km deep · 28 km away
  40. 1.81 km WSW of Hopland, California · 14424 days ago · 0 km deep · 36 km away
  41. 1.59 km NW of Cobb, California · 14424 days ago · 1 km deep · 9 km away
  42. 2.33 km NE of Anchor Bay, California · 14424 days ago · 0 km deep · 67 km away
  43. 1.86 km W of Cobb, California · 14423 days ago · 3 km deep · 2 km away
  44. 1.6Northern California · 14423 days ago · 0 km deep · 1 km away
  45. 1.77 km W of Cobb, California · 14423 days ago · 3 km deep · 3 km away
  46. 1.65 km WSW of Cobb, California · 14423 days ago · 0 km deep · 1 km away
  47. 1.58 km W of Cobb, California · 14422 days ago · 1 km deep · 4 km away
  48. 1.70 km SSW of Larkfield-Wikiup, California · 14422 days ago · 0 km deep · 33 km away
  49. 3.05 km WSW of Cobb, California · 14422 days ago · 1 km deep · 1 km away
  50. 2.16 km WSW of Cobb, California · 14422 days ago · 0 km deep · 1 km away
  51. 2.54 km WSW of Cobb, California · 14422 days ago · -1 km deep · 0 km away
  52. 2.06 km WSW of Cobb, California · 14422 days ago · 0 km deep · 1 km away
  53. 1.55 km SW of Cobb, California · 14422 days ago · 2 km deep · 2 km away
  54. 2.95 km SW of Cobb, California · 14421 days ago · 3 km deep · 2 km away
  55. 1.95 km SW of Cobb, California · 14420 days ago · 1 km deep · 2 km away
  56. 1.76 km W of Cobb, California · 14420 days ago · 3 km deep · 2 km away
  57. 2.615 km W of Guinda, California · 14420 days ago · -1 km deep · 35 km away
  58. 1.64 km ESE of Boonville, CA · 14419 days ago · 4 km deep · 52 km away
  59. 1.84 km ESE of Boonville, California · 14419 days ago · 5 km deep · 52 km away
  60. 1.63 km ESE of Boonville, California · 14419 days ago · 5 km deep · 52 km away

The first 60 of 171.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc95891. Read Tue, Sep 22, 2026, 12:12 PM UTC.