California earthquakes

M1.7 earthquake 7 km W of Cobb, California

A magnitude 1.7 earthquake struck 7 km W of Cobb, California on Tue, Nov 20, 1984, 8:09 AM PST (16:09 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.4 5 km SW 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-11-20 16:09:01 UTC
Depth
-0.9 km (-0.6 mi), shallow
Epicenter
38.810° N, 122.805° 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, 1.2 km in depth
Magnitude uncertainty
±0.22
Depth from
From location
Station coverage gap
86°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 192 in the 60 days after this one and 72 in the 30 days before it.

After

  1. 2.16 km W of Cobb, California · 15290 days ago · 3 km deep · 1 km away
  2. 2.06 km WSW of Cobb, California · 15289 days ago · 0 km deep · 1 km away
  3. 1.66 km W of Cobb, California · 15289 days ago · 3 km deep · 1 km away
  4. 1.85 km SW of Cobb, California · 15289 days ago · 1 km deep · 5 km away
  5. 1.97 km W of Cobb, California · 15289 days ago · 1 km deep · 1 km away
  6. 2.15 km SW of Cobb, California · 15289 days ago · 0 km deep · 5 km away
  7. 1.75 km SW of Cobb, California · 15289 days ago · 0 km deep · 4 km away
  8. 1.510 km NE of Cloverdale, California · 15288 days ago · 1 km deep · 12 km away
  9. 1.88 km W of Cobb, California · 15288 days ago · 1 km deep · 2 km away
  10. 1.88 km W of Cobb, California · 15288 days ago · 0 km deep · 2 km away
  11. 1.57 km WSW of Cobb, California · 15288 days ago · 0 km deep · 1 km away
  12. 1.66 km SW of Cobb, California · 15288 days ago · 1 km deep · 5 km away
  13. 2.15 km NNW of Cobb, California · 15288 days ago · 10 km deep · 8 km away
  14. 1.75 km WSW of Cobb, California · 15287 days ago · 2 km deep · 2 km away
  15. 1.8Northern California · 15287 days ago · 1 km deep · 3 km away
  16. 2.5Northern California · 15287 days ago · 0 km deep · 1 km away
  17. 3.13 km SE of Point Arena, California · 15287 days ago · 8 km deep · 75 km away
  18. 1.87 km WSW of Cobb, California · 15287 days ago · 3 km deep · 2 km away
  19. 2.05 km SW of Cobb, California · 15287 days ago · 1 km deep · 4 km away
  20. 1.63 km SW of Cobb, California · 15286 days ago · -1 km deep · 5 km away
  21. 1.65 km WSW of Cobb, California · 15286 days ago · 1 km deep · 2 km away
  22. 2.49 km ENE of Hidden Valley Lake, California · 15286 days ago · 7 km deep · 30 km away
  23. 2.06 km WSW of Cobb, California · 15286 days ago · 0 km deep · 1 km away
  24. 2.06 km WSW of Cobb, California · 15285 days ago · 0 km deep · 1 km away
  25. 1.86 km WSW of Cobb, California · 15285 days ago · 3 km deep · 1 km away
  26. 2.46 km W of Cobb, California · 15285 days ago · 3 km deep · 1 km away
  27. 1.62 km ENE of Willits, California · 15285 days ago · 4 km deep · 82 km away
  28. 1.6Northern California · 15284 days ago · 1 km deep · 4 km away
  29. 1.54 km WSW of Cobb, California · 15284 days ago · 1 km deep · 3 km away
  30. 1.63 km SW of Forestville, California · 15283 days ago · 2 km deep · 41 km away
  31. 1.69 km W of Cobb, California · 15283 days ago · 0 km deep · 2 km away
  32. 1.77 km WSW of Cobb, California · 15283 days ago · 1 km deep · 1 km away
  33. 1.86 km WSW of Cobb, California · 15283 days ago · 0 km deep · 1 km away
  34. 1.57 km WSW of Cobb, California · 15283 days ago · 0 km deep · 1 km away
  35. 1.85 km N of Cobb, California · 15282 days ago · -1 km deep · 10 km away
  36. 3.36 km WSW of Cobb, California · 15282 days ago · 3 km deep · 1 km away
  37. 1.76 km WSW of Cobb, California · 15281 days ago · 0 km deep · 1 km away
  38. 1.69 km W of Cobb, California · 15281 days ago · 1 km deep · 2 km away
  39. 1.67 km NNE of Geyserville, California · 15281 days ago · 0 km deep · 8 km away
  40. 1.96 km WSW of Cobb, California · 15281 days ago · 3 km deep · 1 km away
  41. 1.722 km W of Elk Creek, California · 15280 days ago · 7 km deep · 92 km away
  42. 1.77 km NE of Willits, California · 15280 days ago · 7 km deep · 83 km away
  43. 1.95 km SW of Cobb, California · 15279 days ago · -1 km deep · 4 km away
  44. 1.74 km W of Cobb, California · 15279 days ago · -1 km deep · 2 km away
  45. 1.812 km ENE of Rutherford, California · 15279 days ago · 7 km deep · 54 km away
  46. 2.26 km W of Cobb, California · 15279 days ago · 2 km deep · 1 km away
  47. 1.95 km SW of Cobb, California · 15279 days ago · 1 km deep · 3 km away
  48. 1.52 km W of Cobb, California · 15278 days ago · -1 km deep · 5 km away
  49. 1.66 km W of Cobb, California · 15278 days ago · 3 km deep · 1 km away
  50. 1.75 km WSW of Glen Ellen, California · 15277 days ago · 11 km deep · 55 km away
  51. 1.75 km SW of Cobb, California · 15276 days ago · 0 km deep · 3 km away
  52. 1.816 km NNE of Upper Lake, California · 15276 days ago · 10 km deep · 54 km away
  53. 1.65 km NNE of Windsor, California · 15276 days ago · 4 km deep · 23 km away
  54. 1.86 km WSW of Cobb, California · 15276 days ago · 0 km deep · 1 km away
  55. 1.73 km SW of Cobb, California · 15276 days ago · 1 km deep · 5 km away
  56. 1.67 km WSW of Cobb, California · 15275 days ago · 4 km deep · 2 km away
  57. 1.67 km WSW of Cobb, California · 15275 days ago · 0 km deep · 1 km away
  58. 2.75 km SW of Cobb, California · 15275 days ago · 0 km deep · 4 km away
  59. 2.05 km SW of Cobb, California · 15275 days ago · -1 km deep · 4 km away
  60. 1.76 km SW of Cobb, California · 15273 days ago · 1 km deep · 4 km away

The first 60 of 192.

Before

  1. 2.45 km SW of Cobb, California · 15291 days ago · 1 km deep · 4 km away
  2. 1.94 km WSW of Cobb, California · 15292 days ago · 1 km deep · 3 km away
  3. 1.58 km ENE of Santa Rosa, California · 15292 days ago · 12 km deep · 41 km away
  4. 1.76 km W of Cobb, California · 15293 days ago · 3 km deep · 2 km away
  5. 1.85 km W of Lower Lake, California · 15294 days ago · 4 km deep · 16 km away
  6. 1.63 km SW of Cobb, California · 15294 days ago · 1 km deep · 5 km away
  7. 2.1Northern California · 15294 days ago · 10 km deep · 50 km away
  8. 1.75 km SW of Cobb, California · 15294 days ago · 1 km deep · 4 km away
  9. 1.618 km NE of Nice, California · 15294 days ago · 7 km deep · 50 km away
  10. 1.919 km NNE of Upper Lake, California · 15294 days ago · 0 km deep · 56 km away
  11. 2.618 km NE of Nice, California · 15294 days ago · 10 km deep · 50 km away
  12. 3.318 km NE of Nice, California · 15294 days ago · 11 km deep · 51 km away
  13. 2.318 km NNE of Nice, California · 15294 days ago · 11 km deep · 51 km away
  14. 1.85 km SSW of Cobb, California · 15295 days ago · 5 km deep · 7 km away
  15. 1.95 km NE of Guerneville, California · 15295 days ago · 1 km deep · 33 km away
  16. 1.56 km WSW of Cobb, California · 15296 days ago · 0 km deep · 1 km away
  17. 1.86 km WSW of Cobb, California · 15296 days ago · 0 km deep · 1 km away
  18. 2.86 km W of Cobb, California · 15296 days ago · 3 km deep · 2 km away
  19. 1.76 km W of Cobb, California · 15296 days ago · 3 km deep · 2 km away
  20. 2.46 km WSW of Cobb, California · 15296 days ago · 0 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1122249. Read Thu, Oct 1, 2026, 6:56 PM UTC.