California earthquakes

M1.9 earthquake 12 km W of Cobb, California

A magnitude 1.9 earthquake struck 12 km W of Cobb, California on Mon, Jan 21, 1985, 1:58 PM PST (21:58 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M4.1 11 km NNE of Cloverdale, 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
1985-01-21 21:58:21 UTC
Depth
-0.9 km (-0.6 mi), shallow
Epicenter
38.823° N, 122.868° 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 3.6 km horizontally, 3.6 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
302°, poorly surrounded by stations
Stations used
4

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 109 in the 30 days before it.

After

  1. 1.76 km W of Cobb, California · 15226 days ago · 0 km deep · 6 km away
  2. 3.56 km W of Cobb, California · 15225 days ago · 1 km deep · 6 km away
  3. 2.66 km W of Cobb, California · 15225 days ago · 1 km deep · 6 km away
  4. 1.76 km W of Cobb, California · 15225 days ago · 0 km deep · 6 km away
  5. 1.96 km W of Cobb, California · 15225 days ago · 2 km deep · 6 km away
  6. 1.58 km WSW of Cobb, California · 15225 days ago · 4 km deep · 6 km away
  7. 1.87 km W of Cobb, California · 15225 days ago · 3 km deep · 5 km away
  8. 1.85 km SW of Cobb, California · 15225 days ago · 1 km deep · 10 km away
  9. 3.16 km WSW of Cobb, California · 15225 days ago · 0 km deep · 6 km away
  10. 1.57 km WSW of Cobb, California · 15225 days ago · 1 km deep · 6 km away
  11. 1.98 km ENE of Hopland, California · 15225 days ago · 22 km deep · 25 km away
  12. 2.37 km WSW of Cobb, California · 15225 days ago · 0 km deep · 6 km away
  13. 2.57 km WSW of Cobb, California · 15225 days ago · 0 km deep · 6 km away
  14. 1.67 km WSW of Cobb, California · 15225 days ago · 1 km deep · 6 km away
  15. 2.07 km WSW of Cobb, California · 15225 days ago · 1 km deep · 6 km away
  16. 1.76 km W of Cobb, California · 15225 days ago · 3 km deep · 6 km away
  17. 1.67 km W of Cobb, California · 15225 days ago · 3 km deep · 5 km away
  18. 1.66 km W of Cobb, California · 15224 days ago · 3 km deep · 6 km away
  19. 2.77 km W of Cobb, California · 15224 days ago · 1 km deep · 5 km away
  20. 1.86 km W of Cobb, California · 15224 days ago · 3 km deep · 6 km away
  21. 1.920 km NNE of Potter Valley, California · 15224 days ago · 7 km deep · 75 km away
  22. 2.07 km WSW of Cobb, California · 15224 days ago · 1 km deep · 6 km away
  23. 1.511 km NNE of Angwin, California · 15223 days ago · 1 km deep · 43 km away
  24. 1.56 km W of Cobb, California · 15223 days ago · 3 km deep · 6 km away
  25. 2.86 km W of Cobb, California · 15223 days ago · 3 km deep · 6 km away
  26. 1.97 km WSW of Cobb, California · 15223 days ago · 2 km deep · 5 km away
  27. 1.97 km NNE of Geyserville, California · 15222 days ago · 2 km deep · 6 km away
  28. 1.86 km W of Cobb, California · 15221 days ago · 0 km deep · 6 km away
  29. 1.67 km W of Cobb, California · 15221 days ago · 1 km deep · 5 km away
  30. 2.07 km W of Cobb, California · 15221 days ago · 3 km deep · 6 km away
  31. 1.76 km W of Cobb, California · 15221 days ago · 1 km deep · 6 km away
  32. 1.67 km W of Cobb, California · 15221 days ago · 4 km deep · 5 km away
  33. 3.25 km NNW of Geyserville, California · 15221 days ago · 4 km deep · 10 km away
  34. 2.86 km WNW of Cobb, California · 15221 days ago · 0 km deep · 6 km away
  35. 1.53 km ENE of Willits, California · 15220 days ago · 7 km deep · 77 km away
  36. 1.87 km W of Cobb, California · 15220 days ago · 4 km deep · 5 km away
  37. 1.66 km W of Cobb, California · 15220 days ago · 3 km deep · 6 km away
  38. 1.59 km W of Cobb, California · 15219 days ago · 2 km deep · 4 km away
  39. 1.84 km WSW of Cobb, California · 15219 days ago · 1 km deep · 9 km away
  40. 2.67 km WSW of Cobb, California · 15219 days ago · 4 km deep · 5 km away
  41. 1.75 km W of Calpella, California · 15219 days ago · 2 km deep · 57 km away
  42. 1.77 km WSW of Cobb, California · 15219 days ago · 2 km deep · 5 km away
  43. 1.67 km NNE of Geyserville, California · 15218 days ago · 2 km deep · 6 km away
  44. 1.64 km E of Hopland, California · 15218 days ago · 26 km deep · 25 km away
  45. 1.63 km E of Hopland, California · 15218 days ago · 23 km deep · 25 km away
  46. 2.46 km SW of Cobb, California · 15218 days ago · 2 km deep · 9 km away
  47. 1.76 km W of Cobb, California · 15217 days ago · 3 km deep · 6 km away
  48. 3.17 km W of Cobb, California · 15217 days ago · 4 km deep · 5 km away
  49. 2.47 km W of Cobb, California · 15217 days ago · 4 km deep · 5 km away
  50. 1.818 km ENE of Potter Valley, California · 15217 days ago · 9 km deep · 64 km away
  51. 2.55 km SW of Cobb, California · 15217 days ago · 1 km deep · 9 km away
  52. 1.86 km W of Cobb, California · 15217 days ago · 3 km deep · 6 km away
  53. 1.56 km SSW of Hopland, California · 15216 days ago · 0 km deep · 27 km away
  54. 2.13 km SW of Cobb, California · 15216 days ago · 1 km deep · 11 km away
  55. 1.67 km W of Cobb, California · 15215 days ago · 4 km deep · 5 km away
  56. 1.61 km SW of Redwood Valley, California · 15215 days ago · 3 km deep · 56 km away
  57. 2.04 km WSW of Cobb, California · 15215 days ago · 1 km deep · 8 km away
  58. 1.95 km NNW of Geyserville, California · 15214 days ago · 5 km deep · 9 km away
  59. 1.66 km E of Willits, California · 15214 days ago · 5 km deep · 74 km away
  60. 1.77 km WSW of Cobb, California · 15213 days ago · 4 km deep · 6 km away

The first 60 of 193.

Before

  1. 1.65 km SSW of Hopland, California · 15226 days ago · 2 km deep · 25 km away
  2. 1.62 km SE of Hopland, California · 15226 days ago · 10 km deep · 25 km away
  3. 1.74 km WSW of Cobb, California · 15227 days ago · 1 km deep · 9 km away
  4. 1.614 km SSW of Hopland, California · 15227 days ago · 12 km deep · 30 km away
  5. 1.77 km WSW of Cobb, California · 15227 days ago · 3 km deep · 6 km away
  6. 1.714 km NNE of Angwin, California · 15228 days ago · 13 km deep · 45 km away
  7. 2.26 km W of Cobb, California · 15228 days ago · 2 km deep · 6 km away
  8. 1.81 km S of Hopland, California · 15228 days ago · 21 km deep · 26 km away
  9. 1.97 km W of Cobb, California · 15230 days ago · 3 km deep · 5 km away
  10. 1.9Northern California · 15230 days ago · 1 km deep · 4 km away
  11. 1.75 km WSW of Cobb, California · 15231 days ago · 0 km deep · 7 km away
  12. 1.67 km WSW of Cobb, California · 15231 days ago · 1 km deep · 5 km away
  13. 1.64 km ENE of Willits, California · 15232 days ago · 2 km deep · 77 km away
  14. 1.56 km W of Cobb, California · 15232 days ago · 1 km deep · 6 km away
  15. 2.63 km NW of Cobb, California · 15232 days ago · 0 km deep · 11 km away
  16. 1.72 km W of Sea Ranch, California · 15232 days ago · 4 km deep · 55 km away
  17. 1.66 km WSW of Cobb, California · 15232 days ago · 0 km deep · 7 km away
  18. 2.36 km WSW of Cobb, California · 15232 days ago · 1 km deep · 7 km away
  19. 1.76 km WSW of Cobb, California · 15232 days ago · 1 km deep · 6 km away
  20. 1.77 km W of Cobb, California · 15233 days ago · 3 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1125330. Read Tue, Sep 29, 2026, 5:51 PM UTC.