California earthquakes

M1.7 earthquake 7 km W of Cobb, California

A magnitude 1.7 earthquake struck 7 km W of Cobb, California on Mon, Jan 9, 1984, 11:50 AM PST (19:50 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.9 near the coast of 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
1.7 (md), micro
Local time
UTC
1984-01-09 19:50:00 UTC
Depth
3.0 km (1.8 mi), shallow
Epicenter
38.819° N, 122.808° 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, 0.7 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
92°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 169 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.9near the coast of Northern California · 15582 days ago · 8 km deep · 76 km away
  2. 2.415 km W of Guinda, California · 15582 days ago · 8 km deep · 38 km away
  3. 2.0Northern California · 15582 days ago · 3 km deep · 1 km away
  4. 1.78 km WNW of Cobb, California · 15581 days ago · 0 km deep · 5 km away
  5. 1.77 km WSW of Cobb, California · 15581 days ago · 2 km deep · 2 km away
  6. 1.76 km WSW of Cobb, California · 15581 days ago · 3 km deep · 2 km away
  7. 1.66 km WSW of Cobb, California · 15581 days ago · 1 km deep · 2 km away
  8. 1.87 km W of Cobb, California · 15581 days ago · 3 km deep · 0 km away
  9. 1.58 km WSW of Cobb, California · 15581 days ago · 3 km deep · 2 km away
  10. 1.76 km W of Cobb, California · 15581 days ago · 3 km deep · 1 km away
  11. 1.97 km W of Cobb, California · 15579 days ago · 3 km deep · 0 km away
  12. 1.90 km S of Deer Park, California · 15579 days ago · 11 km deep · 44 km away
  13. 1.97 km WSW of Cobb, California · 15579 days ago · 3 km deep · 3 km away
  14. 2.612 km WNW of Guinda, California · 15579 days ago · 15 km deep · 41 km away
  15. 2.06 km WSW of Cobb, California · 15579 days ago · 0 km deep · 2 km away
  16. 2.25 km WSW of Cobb, California · 15579 days ago · 1 km deep · 3 km away
  17. 1.75 km WSW of Cobb, California · 15579 days ago · 1 km deep · 2 km away
  18. 2.66 km WSW of Cobb, California · 15578 days ago · 0 km deep · 2 km away
  19. 1.610 km NNW of Cazadero, California · 15578 days ago · 2 km deep · 35 km away
  20. 1.6Northern California · 15577 days ago · 1 km deep · 6 km away
  21. 1.623 km WNW of Stonyford, California · 15577 days ago · 4 km deep · 68 km away
  22. 1.79 km W of Cobb, California · 15576 days ago · 2 km deep · 3 km away
  23. 1.61 km ENE of Redwood Valley, California · 15576 days ago · -1 km deep · 60 km away
  24. 2.06 km W of Cobb, California · 15576 days ago · -1 km deep · 1 km away
  25. 2.28 km W of Cobb, California · 15576 days ago · 1 km deep · 2 km away
  26. 1.88 km W of Cobb, California · 15576 days ago · 1 km deep · 2 km away
  27. 1.78 km W of Cobb, California · 15576 days ago · 1 km deep · 2 km away
  28. 1.810 km WSW of Point Arena, California · 15575 days ago · 1 km deep · 86 km away
  29. 1.77 km W of Cobb, California · 15575 days ago · -1 km deep · 1 km away
  30. 2.37 km W of Cobb, California · 15575 days ago · 3 km deep · 0 km away
  31. 2.27 km WSW of Cobb, California · 15574 days ago · 3 km deep · 2 km away
  32. 2.3Northern California · 15574 days ago · 2 km deep · 36 km away
  33. 2.38 km W of Cobb, California · 15574 days ago · -1 km deep · 1 km away
  34. 1.58 km W of Cobb, California · 15574 days ago · 1 km deep · 2 km away
  35. 1.67 km W of Cobb, California · 15574 days ago · 3 km deep · 0 km away
  36. 1.85 km E of Calpella, California · 15573 days ago · 2 km deep · 54 km away
  37. 1.76 km W of Cobb, California · 15573 days ago · 3 km deep · 1 km away
  38. 1.86 km W of Cobb, California · 15573 days ago · 3 km deep · 1 km away
  39. 2.06 km W of Cobb, California · 15571 days ago · 3 km deep · 1 km away
  40. 2.27 km W of Cobb, California · 15571 days ago · 3 km deep · 0 km away
  41. 1.67 km W of Cobb, California · 15571 days ago · 3 km deep · 0 km away
  42. 1.66 km W of Cobb, California · 15571 days ago · 3 km deep · 1 km away
  43. 1.83 km N of Cloverdale, California · 15571 days ago · 5 km deep · 17 km away
  44. 1.57 km W of Cobb, California · 15571 days ago · 3 km deep · 0 km away
  45. 1.98 km W of Cobb, California · 15570 days ago · 1 km deep · 2 km away
  46. 2.36 km WSW of Cobb, California · 15570 days ago · 0 km deep · 2 km away
  47. 1.66 km W of Cobb, California · 15570 days ago · 3 km deep · 1 km away
  48. 1.69 km WSW of Cobb, California · 15569 days ago · 1 km deep · 3 km away
  49. 1.87 km W of Cobb, California · 15569 days ago · 3 km deep · 1 km away
  50. 1.97 km WSW of Cobb, California · 15569 days ago · 0 km deep · 2 km away
  51. 1.94 km WSW of Cobb, California · 15569 days ago · 3 km deep · 4 km away
  52. 1.86 km W of Cobb, California · 15568 days ago · 3 km deep · 1 km away
  53. 1.8Northern California · 15568 days ago · 35 km deep · 14 km away
  54. 1.86 km W of Cobb, California · 15568 days ago · 2 km deep · 1 km away
  55. 2.16 km WSW of Cobb, California · 15567 days ago · 3 km deep · 2 km away
  56. 2.12 km WNW of Santa Rosa, California · 15567 days ago · 2 km deep · 41 km away
  57. 1.7Northern California · 15567 days ago · 0 km deep · 4 km away
  58. 1.97 km W of Cobb, California · 15567 days ago · 1 km deep · 1 km away
  59. 1.75 km WSW of Cobb, California · 15566 days ago · 0 km deep · 4 km away
  60. 1.65 km WSW of Cobb, California · 15566 days ago · 0 km deep · 4 km away

The first 60 of 169.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1109721. Read Tue, Sep 22, 2026, 9:25 PM UTC.