California earthquakes

M1.7 earthquake 7 km W of Cobb, California

A magnitude 1.7 earthquake struck 7 km W of Cobb, California on Sat, Dec 3, 1983, 6:33 PM PST (02:33 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M1.9 4 km W 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
1.7 (md), micro
Local time
UTC
1983-12-04 02:33:22 UTC
Depth
1.5 km (0.9 mi), shallow
Epicenter
38.818° N, 122.806° 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, 0.4 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
90°
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 167 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.94 km W of Cobb, California · 15627 days ago · 0 km deep · 3 km away
  2. 1.69 km W of Cobb, California · 15626 days ago · 1 km deep · 2 km away
  3. 2.610 km WSW of Hopland, California · 15626 days ago · 2 km deep · 39 km away
  4. 3.414 km N of Brooktrails, California · 15626 days ago · 6 km deep · 97 km away
  5. 2.010 km WSW of Hopland, California · 15625 days ago · 2 km deep · 39 km away
  6. 2.311 km ESE of Potter Valley, California · 15625 days ago · 6 km deep · 54 km away
  7. 1.87 km WSW of Cobb, California · 15624 days ago · 1 km deep · 2 km away
  8. 1.88 km NE of Willits, California · 15624 days ago · 7 km deep · 82 km away
  9. 3.17 km W of Cobb, California · 15624 days ago · 0 km deep · 1 km away
  10. 2.07 km WSW of Cobb, California · 15624 days ago · 0 km deep · 2 km away
  11. 1.79 km ESE of Hidden Valley Lake, California · 15623 days ago · 6 km deep · 31 km away
  12. 1.56 km W of Cobb, California · 15623 days ago · 3 km deep · 1 km away
  13. 2.08 km WSW of Cobb, California · 15622 days ago · 1 km deep · 3 km away
  14. 1.55 km WSW of Cobb, California · 15622 days ago · 1 km deep · 3 km away
  15. 2.213 km ESE of Angwin, California · 15622 days ago · -1 km deep · 53 km away
  16. 1.58 km SW of Calistoga, California · 15622 days ago · 6 km deep · 36 km away
  17. 2.42 km SE of Clear Lake Riviera, California · 15622 days ago · 1 km deep · 17 km away
  18. 2.13 km SE of Clear Lake Riviera, California · 15622 days ago · 2 km deep · 17 km away
  19. 1.714 km SE of Laytonville, California · 15622 days ago · 3 km deep · 99 km away
  20. 1.65 km SW of Cobb, California · 15620 days ago · 0 km deep · 5 km away
  21. 1.77 km WSW of Cobb, California · 15620 days ago · 1 km deep · 1 km away
  22. 1.99 km WSW of Cobb, California · 15620 days ago · 1 km deep · 3 km away
  23. 2.06 km WSW of Cobb, California · 15618 days ago · 2 km deep · 1 km away
  24. 1.83 km E of Santa Rosa, California · 15618 days ago · 8 km deep · 43 km away
  25. 1.87 km WSW of Cobb, California · 15618 days ago · 0 km deep · 2 km away
  26. 1.76 km WSW of Cobb, California · 15618 days ago · 3 km deep · 1 km away
  27. 1.823 km ENE of Potter Valley, California · 15618 days ago · 14 km deep · 65 km away
  28. 1.59 km WSW of Cobb, California · 15617 days ago · 1 km deep · 3 km away
  29. 3.17 km W of Cobb, California · 15617 days ago · 1 km deep · 1 km away
  30. 1.76 km W of Cobb, California · 15616 days ago · 3 km deep · 1 km away
  31. 2.928 km WNW of Stonyford, California · 15616 days ago · 4 km deep · 74 km away
  32. 1.625 km NNE of Potter Valley, California · 15616 days ago · 5 km deep · 81 km away
  33. 1.66 km W of Cobb, California · 15616 days ago · 3 km deep · 1 km away
  34. 1.54 km NW of Redwood Valley, California · 15614 days ago · 7 km deep · 65 km away
  35. 1.84 km S of Cobb, California · 15614 days ago · 1 km deep · 8 km away
  36. 1.711 km NE of Healdsburg, California · 15614 days ago · 5 km deep · 17 km away
  37. 1.56 km W of Cobb, California · 15614 days ago · 3 km deep · 1 km away
  38. 2.47 km W of Cobb, California · 15614 days ago · 2 km deep · 0 km away
  39. 2.25 km WSW of Cobb, California · 15614 days ago · 0 km deep · 2 km away
  40. 2.36 km WSW of Cobb, California · 15614 days ago · 0 km deep · 2 km away
  41. 1.97 km WSW of Cobb, California · 15613 days ago · 0 km deep · 2 km away
  42. 2.26 km W of Cobb, California · 15612 days ago · 3 km deep · 1 km away
  43. 1.58 km WSW of Cobb, California · 15612 days ago · 3 km deep · 2 km away
  44. 1.56 km WSW of Cobb, California · 15611 days ago · 1 km deep · 2 km away
  45. 1.66 km W of Cobb, California · 15611 days ago · 3 km deep · 1 km away
  46. 2.26 km W of Cobb, California · 15610 days ago · 3 km deep · 1 km away
  47. 1.88 km WSW of Cobb, California · 15610 days ago · 1 km deep · 2 km away
  48. 1.66 km WSW of Cobb, California · 15610 days ago · 4 km deep · 1 km away
  49. 2.37 km W of Cobb, California · 15610 days ago · 0 km deep · 1 km away
  50. 1.77 km W of Cobb, California · 15610 days ago · 1 km deep · 2 km away
  51. 2.013 km WSW of Esparto, California · 15609 days ago · 8 km deep · 61 km away
  52. 2.47 km WSW of Cobb, California · 15609 days ago · 1 km deep · 2 km away
  53. 2.16 km S of Clear Lake Riviera, California · 15609 days ago · -1 km deep · 11 km away
  54. 1.75 km WSW of Cobb, California · 15609 days ago · -1 km deep · 2 km away
  55. 2.57 km W of Cobb, California · 15608 days ago · 2 km deep · 1 km away
  56. 1.712 km N of Brooktrails, California · 15608 days ago · 6 km deep · 96 km away
  57. 2.16 km ENE of Willits, California · 15607 days ago · 3 km deep · 79 km away
  58. 1.69 km WSW of Cobb, California · 15607 days ago · 2 km deep · 3 km away
  59. 1.610 km SE of Boonville, California · 15606 days ago · 2 km deep · 44 km away
  60. 1.56 km WSW of Cobb, California · 15606 days ago · 0 km deep · 1 km away

The first 60 of 167.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1107954. Read Tue, Sep 22, 2026, 10:24 AM UTC.