California earthquakes

M1.8 earthquake 6 km W of Cobb, California

A magnitude 1.8 earthquake struck 6 km W of Cobb, California on Thu, Feb 2, 1984, 12:33 PM PST (20:33 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.7 7 km WSW 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
1.8 (md), micro
Local time
UTC
1984-02-02 20:33:44 UTC
Depth
3.2 km (2.0 mi), shallow
Epicenter
38.820° N, 122.801° 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, 0.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
81°
Stations used
14

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 0 in the 30 days before it.

After

  1. 2.77 km WSW of Cobb, California · 15560 days ago · 3 km deep · 3 km away
  2. 1.67 km W of Cobb, California · 15560 days ago · 3 km deep · 1 km away
  3. 1.77 km WSW of Cobb, California · 15560 days ago · 2 km deep · 2 km away
  4. 1.87 km W of Cobb, California · 15560 days ago · 3 km deep · 1 km away
  5. 3.05 km WSW of Cobb, California · 15560 days ago · 0 km deep · 3 km away
  6. 2.05 km WSW of Cobb, California · 15560 days ago · 1 km deep · 2 km away
  7. 1.55 km W of Cobb, California · 15559 days ago · 1 km deep · 1 km away
  8. 1.96 km W of Cobb, California · 15559 days ago · 3 km deep · 0 km away
  9. 1.56 km WSW of Cobb, California · 15559 days ago · 0 km deep · 1 km away
  10. 1.67 km WSW of Cobb, California · 15559 days ago · 1 km deep · 2 km away
  11. 1.75 km WSW of Glen Ellen, California · 15559 days ago · 0 km deep · 57 km away
  12. 2.4Northern California · 15558 days ago · 2 km deep · 0 km away
  13. 1.86 km W of Cobb, California · 15558 days ago · 3 km deep · 1 km away
  14. 1.63 km NW of Lakeport, California · 15558 days ago · 1 km deep · 30 km away
  15. 1.66 km WSW of Cobb, California · 15557 days ago · 0 km deep · 2 km away
  16. 1.66 km SSW of Cobb, California · 15556 days ago · 4 km deep · 7 km away
  17. 2.26 km S of Albion, California · 15556 days ago · 0 km deep · 93 km away
  18. 1.66 km W of Cobb, California · 15556 days ago · 3 km deep · 1 km away
  19. 1.74 km E of Saint Helena, California · 15556 days ago · 11 km deep · 47 km away
  20. 2.17 km W of Cobb, California · 15555 days ago · 3 km deep · 1 km away
  21. 1.76 km WSW of Cobb, California · 15554 days ago · 1 km deep · 2 km away
  22. 1.74 km NNE of Kenwood, California · 15553 days ago · 7 km deep · 48 km away
  23. 2.36 km W of Cobb, California · 15553 days ago · 2 km deep · 1 km away
  24. 1.97 km WSW of Cobb, California · 15551 days ago · 0 km deep · 2 km away
  25. 1.96 km WSW of Cobb, California · 15551 days ago · 3 km deep · 1 km away
  26. 2.66 km W of Cobb, California · 15551 days ago · 3 km deep · 0 km away
  27. 1.822 km N of Potter Valley, California · 15551 days ago · 0 km deep · 83 km away
  28. 1.58 km WSW of Cobb, California · 15550 days ago · 2 km deep · 3 km away
  29. 2.55 km SW of Cobb, California · 15550 days ago · 1 km deep · 4 km away
  30. 1.65 km SW of Cobb, California · 15549 days ago · 0 km deep · 5 km away
  31. 2.19 km WSW of Cobb, California · 15549 days ago · 1 km deep · 3 km away
  32. 2.39 km WSW of Cobb, California · 15549 days ago · 2 km deep · 3 km away
  33. 1.97 km W of Cobb, California · 15549 days ago · 3 km deep · 1 km away
  34. 2.26 km SSE of Willows, California · 15549 days ago · 22 km deep · 90 km away
  35. 2.37 km ESE of Willits, California · 15548 days ago · 3 km deep · 75 km away
  36. 1.56 km W of Cobb, California · 15548 days ago · 3 km deep · 0 km away
  37. 1.83 km E of Calpella, California · 15548 days ago · 2 km deep · 56 km away
  38. 1.86 km WSW of Cobb, California · 15548 days ago · 1 km deep · 1 km away
  39. 1.65 km WSW of Cobb, California · 15548 days ago · 1 km deep · 2 km away
  40. 1.78 km WSW of Cobb, California · 15547 days ago · 3 km deep · 2 km away
  41. 1.67 km W of Cobb, California · 15547 days ago · 3 km deep · 1 km away
  42. 2.77 km W of Cobb, California · 15547 days ago · 3 km deep · 1 km away
  43. 1.917 km ENE of Potter Valley, California · 15547 days ago · 7 km deep · 66 km away
  44. 1.75 km E of Brooktrails, California · 15546 days ago · 5 km deep · 83 km away
  45. 2.26 km W of Cobb, California · 15546 days ago · 3 km deep · 1 km away
  46. 2.16 km W of Cobb, California · 15545 days ago · 0 km deep · 1 km away
  47. 2.69 km WSW of Cobb, California · 15545 days ago · 2 km deep · 3 km away
  48. 2.19 km WSW of Cobb, California · 15545 days ago · 2 km deep · 3 km away
  49. 2.05 km SW of Cobb, California · 15544 days ago · 0 km deep · 4 km away
  50. 3.06 km WSW of Cobb, California · 15544 days ago · 3 km deep · 1 km away
  51. 2.07 km WSW of Cobb, California · 15544 days ago · 3 km deep · 2 km away
  52. 2.05 km SW of Cobb, California · 15544 days ago · 0 km deep · 4 km away
  53. 2.05 km SW of Cobb, California · 15544 days ago · 0 km deep · 4 km away
  54. 1.85 km SW of Cobb, California · 15544 days ago · 0 km deep · 4 km away
  55. 1.911 km N of Cazadero, California · 15544 days ago · 13 km deep · 32 km away
  56. 1.68 km WSW of Cobb, California · 15544 days ago · 3 km deep · 2 km away
  57. 1.74 km ESE of Santa Rosa, California · 15543 days ago · 9 km deep · 45 km away
  58. 1.95 km SW of Cobb, California · 15543 days ago · 1 km deep · 4 km away
  59. 1.74 km ESE of Santa Rosa, California · 15543 days ago · 7 km deep · 46 km away
  60. 1.85 km WSW of Cobb, California · 15543 days ago · 0 km deep · 2 km away

The first 60 of 170.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1110708. Read Tue, Sep 22, 2026, 9:59 AM UTC.