California earthquakes

M1.9 earthquake 4 km WSW of Cobb, California

A magnitude 1.9 earthquake struck 4 km WSW of Cobb, California on Thu, Nov 8, 1984, 9:55 PM PST (05:55 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
1.9 (md), micro
Local time
UTC
1984-11-09 05:55:57 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
38.803° N, 122.772° 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, 0.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
44°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 193 in the 60 days after this one and 75 in the 30 days before it.

After

  1. 1.64 km ENE of Brooktrails, California · 15300 days ago · 2 km deep · 89 km away
  2. 1.96 km W of Cobb, California · 15300 days ago · 3 km deep · 2 km away
  3. 1.78 km WNW of Cobb, California · 15300 days ago · 0 km deep · 7 km away
  4. 1.64 km SW of Cobb, California · 15300 days ago · -1 km deep · 1 km away
  5. 2.56 km W of Cobb, California · 15299 days ago · 3 km deep · 3 km away
  6. 1.87 km W of Cobb, California · 15298 days ago · 3 km deep · 4 km away
  7. 2.45 km WSW of Cobb, California · 15297 days ago · -1 km deep · 1 km away
  8. 1.66 km W of Cobb, California · 15297 days ago · 3 km deep · 3 km away
  9. 1.66 km W of Cobb, California · 15296 days ago · 3 km deep · 3 km away
  10. 2.46 km WSW of Cobb, California · 15295 days ago · 0 km deep · 2 km away
  11. 1.76 km W of Cobb, California · 15295 days ago · 3 km deep · 3 km away
  12. 2.86 km W of Cobb, California · 15295 days ago · 3 km deep · 3 km away
  13. 1.86 km WSW of Cobb, California · 15295 days ago · 0 km deep · 2 km away
  14. 1.56 km WSW of Cobb, California · 15295 days ago · 0 km deep · 2 km away
  15. 1.95 km NE of Guerneville, California · 15294 days ago · 1 km deep · 33 km away
  16. 1.85 km SSW of Cobb, California · 15294 days ago · 5 km deep · 4 km away
  17. 2.318 km NNE of Nice, California · 15294 days ago · 11 km deep · 51 km away
  18. 3.318 km NE of Nice, California · 15294 days ago · 11 km deep · 51 km away
  19. 2.618 km NE of Nice, California · 15294 days ago · 10 km deep · 51 km away
  20. 1.919 km NNE of Upper Lake, California · 15294 days ago · 0 km deep · 57 km away
  21. 1.618 km NE of Nice, California · 15294 days ago · 7 km deep · 50 km away
  22. 1.75 km SW of Cobb, California · 15294 days ago · 1 km deep · 2 km away
  23. 2.1Northern California · 15293 days ago · 10 km deep · 51 km away
  24. 1.63 km SW of Cobb, California · 15293 days ago · 1 km deep · 2 km away
  25. 1.85 km W of Lower Lake, California · 15293 days ago · 4 km deep · 14 km away
  26. 1.76 km W of Cobb, California · 15292 days ago · 3 km deep · 3 km away
  27. 1.58 km ENE of Santa Rosa, California · 15292 days ago · 12 km deep · 39 km away
  28. 1.94 km WSW of Cobb, California · 15291 days ago · 1 km deep · 0 km away
  29. 2.45 km SW of Cobb, California · 15291 days ago · 1 km deep · 2 km away
  30. 1.77 km W of Cobb, California · 15289 days ago · -1 km deep · 3 km away
  31. 2.16 km W of Cobb, California · 15289 days ago · 3 km deep · 2 km away
  32. 2.06 km WSW of Cobb, California · 15289 days ago · 0 km deep · 2 km away
  33. 1.66 km W of Cobb, California · 15289 days ago · 3 km deep · 2 km away
  34. 1.85 km SW of Cobb, California · 15288 days ago · 1 km deep · 2 km away
  35. 1.97 km W of Cobb, California · 15288 days ago · 1 km deep · 4 km away
  36. 2.15 km SW of Cobb, California · 15288 days ago · 0 km deep · 2 km away
  37. 1.75 km SW of Cobb, California · 15288 days ago · 0 km deep · 2 km away
  38. 1.510 km NE of Cloverdale, California · 15288 days ago · 1 km deep · 14 km away
  39. 1.88 km W of Cobb, California · 15288 days ago · 1 km deep · 5 km away
  40. 1.88 km W of Cobb, California · 15288 days ago · 0 km deep · 5 km away
  41. 1.57 km WSW of Cobb, California · 15288 days ago · 0 km deep · 3 km away
  42. 1.66 km SW of Cobb, California · 15287 days ago · 1 km deep · 3 km away
  43. 2.15 km NNW of Cobb, California · 15287 days ago · 10 km deep · 7 km away
  44. 1.75 km WSW of Cobb, California · 15286 days ago · 2 km deep · 1 km away
  45. 1.8Northern California · 15286 days ago · 1 km deep · 0 km away
  46. 2.5Northern California · 15286 days ago · 0 km deep · 4 km away
  47. 3.13 km SE of Point Arena, California · 15286 days ago · 8 km deep · 78 km away
  48. 1.87 km WSW of Cobb, California · 15286 days ago · 3 km deep · 3 km away
  49. 2.05 km SW of Cobb, California · 15286 days ago · 1 km deep · 2 km away
  50. 1.63 km SW of Cobb, California · 15286 days ago · -1 km deep · 2 km away
  51. 1.65 km WSW of Cobb, California · 15285 days ago · 1 km deep · 1 km away
  52. 2.49 km ENE of Hidden Valley Lake, California · 15285 days ago · 7 km deep · 28 km away
  53. 2.06 km WSW of Cobb, California · 15285 days ago · 0 km deep · 2 km away
  54. 2.06 km WSW of Cobb, California · 15285 days ago · 0 km deep · 2 km away
  55. 1.86 km WSW of Cobb, California · 15284 days ago · 3 km deep · 2 km away
  56. 2.46 km W of Cobb, California · 15284 days ago · 3 km deep · 3 km away
  57. 1.62 km ENE of Willits, California · 15284 days ago · 4 km deep · 84 km away
  58. 1.6Northern California · 15283 days ago · 1 km deep · 2 km away
  59. 1.54 km WSW of Cobb, California · 15283 days ago · 1 km deep · 0 km away
  60. 1.63 km SW of Forestville, California · 15283 days ago · 2 km deep · 41 km away

The first 60 of 193.

Before

  1. 2.35 km WSW of Cobb, California · 15301 days ago · 1 km deep · 1 km away
  2. 1.86 km W of Cobb, California · 15301 days ago · 3 km deep · 2 km away
  3. 1.62 km SSE of Crockett, California · 15302 days ago · 20 km deep · 99 km away
  4. 1.57 km S of Cobb, California · 15302 days ago · 1 km deep · 7 km away
  5. 2.04 km S of Cobb, California · 15302 days ago · 1 km deep · 5 km away
  6. 1.610 km N of Cloverdale, California · 15302 days ago · 3 km deep · 23 km away
  7. 1.919 km NNE of Upper Lake, California · 15302 days ago · 6 km deep · 59 km away
  8. 1.77 km W of Cobb, California · 15304 days ago · 4 km deep · 3 km away
  9. 1.65 km WSW of Temelec, California · 15305 days ago · 2 km deep · 64 km away
  10. 1.76 km W of Cobb, California · 15305 days ago · 3 km deep · 2 km away
  11. 2.05 km ENE of Clearlake, California · 15306 days ago · 2 km deep · 27 km away
  12. 1.74 km W of Cobb, California · 15306 days ago · -1 km deep · 2 km away
  13. 1.75 km SW of Cobb, California · 15306 days ago · 0 km deep · 2 km away
  14. 2.75 km SW of Cobb, California · 15306 days ago · 0 km deep · 1 km away
  15. 2.82 km WSW of Sea Ranch, California · 15307 days ago · 0 km deep · 62 km away
  16. 1.57 km NNE of Geyserville, California · 15307 days ago · 4 km deep · 10 km away
  17. 2.06 km W of Cobb, California · 15309 days ago · 3 km deep · 3 km away
  18. 1.63 km SW of Cobb, California · 15310 days ago · 1 km deep · 2 km away
  19. 1.78 km W of Cobb, California · 15310 days ago · 1 km deep · 5 km away
  20. 3.12 km SE of Larkfield-Wikiup, California · 15310 days ago · 6 km deep · 34 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc31521. Read Wed, Sep 30, 2026, 11:32 PM UTC.