California earthquakes

M1.6 earthquake 7 km S of Cobb, California

A magnitude 1.6 earthquake struck 7 km S of Cobb, California on Sat, Dec 22, 1990, 8:40 AM PST (16:40 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.8 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-12-22 16:40:23 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
38.755° N, 122.725° 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 1.1 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
182°, poorly surrounded by stations
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 174 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 2.06 km W of Cobb, California · 13070 days ago · 2 km deep · 10 km away
  2. 1.627 km NNE of Potter Valley, California · 13069 days ago · 10 km deep · 90 km away
  3. 1.65 km N of Geyserville, California · 13069 days ago · 4 km deep · 15 km away
  4. 1.6Northern California · 13068 days ago · 1 km deep · 12 km away
  5. 1.9Northern California · 13068 days ago · 1 km deep · 6 km away
  6. 1.6Northern California · 13068 days ago · 0 km deep · 1 km away
  7. 1.57 km WNW of Cobb, California · 13068 days ago · 0 km deep · 12 km away
  8. 2.63 km W of Cobb, California · 13068 days ago · 0 km deep · 9 km away
  9. 2.23 km WNW of Cobb, California · 13068 days ago · 1 km deep · 9 km away
  10. 1.718 km ENE of Potter Valley, California · 13067 days ago · 5 km deep · 69 km away
  11. 1.61 km E of Hopland, California · 13067 days ago · 3 km deep · 40 km away
  12. 2.07 km W of Cobb, California · 13065 days ago · 0 km deep · 11 km away
  13. 1.717 km E of Potter Valley, California · 13065 days ago · 6 km deep · 67 km away
  14. 1.72 km E of Clearlake Oaks, California · 13065 days ago · -1 km deep · 31 km away
  15. 3.85 km SW of Cobb, California · 13065 days ago · 1 km deep · 4 km away
  16. 1.95 km WSW of Cobb, California · 13065 days ago · 0 km deep · 7 km away
  17. 1.78 km WSW of Cobb, California · 13064 days ago · 0 km deep · 10 km away
  18. 1.63 km SSW of Cobb, California · 13064 days ago · 1 km deep · 5 km away
  19. 2.48 km WNW of Cobb, California · 13064 days ago · 0 km deep · 12 km away
  20. 1.710 km WNW of Cobb, California · 13062 days ago · 1 km deep · 14 km away
  21. 1.75 km SSW of Cobb, California · 13061 days ago · 1 km deep · 3 km away
  22. 1.79 km WNW of Cobb, California · 13059 days ago · 2 km deep · 13 km away
  23. 3.77 km WSW of Cobb, California · 13058 days ago · 4 km deep · 9 km away
  24. 1.66 km WSW of Cobb, California · 13058 days ago · 1 km deep · 7 km away
  25. 2.07 km WSW of Cobb, California · 13058 days ago · 1 km deep · 9 km away
  26. 2.48 km W of Cobb, California · 13058 days ago · 1 km deep · 11 km away
  27. 2.08 km W of Cobb, California · 13058 days ago · 1 km deep · 11 km away
  28. 1.930 km SE of Covelo, California · 13058 days ago · 10 km deep · 96 km away
  29. 1.86 km W of Cobb, California · 13057 days ago · 0 km deep · 10 km away
  30. 1.86 km W of Cobb, California · 13057 days ago · 0 km deep · 10 km away
  31. 1.64 km WSW of Cobb, California · 13057 days ago · 0 km deep · 7 km away
  32. 1.53 km ENE of Santa Rosa, California · 13057 days ago · 9 km deep · 33 km away
  33. 1.75 km SW of Cobb, California · 13056 days ago · -1 km deep · 5 km away
  34. 1.821 km ENE of Potter Valley, California · 13055 days ago · 6 km deep · 70 km away
  35. 1.65 km WSW of Cobb, California · 13055 days ago · 4 km deep · 6 km away
  36. 1.91 km W of American Canyon, California · 13055 days ago · 3 km deep · 76 km away
  37. 3.15 km WSW of Cobb, California · 13054 days ago · 0 km deep · 7 km away
  38. 1.85 km WSW of Cobb, California · 13054 days ago · 0 km deep · 7 km away
  39. 1.712 km ENE of Cloverdale, California · 13054 days ago · 1 km deep · 16 km away
  40. 1.713 km ENE of Cloverdale, California · 13053 days ago · 1 km deep · 16 km away
  41. 1.86 km WSW of Cobb, California · 13053 days ago · 1 km deep · 8 km away
  42. 1.67 km E of Calpella, California · 13052 days ago · 2 km deep · 64 km away
  43. 2.15 km W of Cobb, California · 13052 days ago · 0 km deep · 9 km away
  44. 1.6Northern California · 13051 days ago · 1 km deep · 16 km away
  45. 1.87 km W of Cobb, California · 13051 days ago · 4 km deep · 10 km away
  46. 1.77 km WSW of Cobb, California · 13051 days ago · 4 km deep · 8 km away
  47. 1.90 km SE of Hopland, California · 13050 days ago · 1 km deep · 41 km away
  48. 1.74 km W of Cobb, California · 13050 days ago · 2 km deep · 9 km away
  49. 1.56 km S of Cobb, California · 13050 days ago · 1 km deep · 1 km away
  50. 1.65 km WNW of Cobb, California · 13050 days ago · 1 km deep · 10 km away
  51. 1.89 km W of Cobb, California · 13049 days ago · 1 km deep · 13 km away
  52. 2.29 km W of Cobb, California · 13049 days ago · -1 km deep · 11 km away
  53. 2.38 km W of Cobb, California · 13049 days ago · 0 km deep · 11 km away
  54. 1.67 km WNW of Cobb, California · 13049 days ago · 1 km deep · 12 km away
  55. 1.74 km W of Cobb, California · 13049 days ago · 2 km deep · 9 km away
  56. 2.07 km S of Cobb, California · 13049 days ago · -1 km deep · 1 km away
  57. 1.89 km W of Cobb, California · 13048 days ago · 0 km deep · 12 km away
  58. 1.67 km W of Cobb, California · 13048 days ago · 4 km deep · 10 km away
  59. 1.97 km W of Cobb, California · 13048 days ago · 3 km deep · 10 km away
  60. 1.513 km ESE of Hidden Valley Lake, California · 13047 days ago · 5 km deep · 26 km away

The first 60 of 174.

Before

  1. 1.65 km W of Middletown, California · 13070 days ago · 4 km deep · 4 km away
  2. 1.710 km ENE of Brooktrails, California · 13071 days ago · 8 km deep · 94 km away
  3. 2.14 km WSW of Cobb, California · 13071 days ago · 1 km deep · 7 km away
  4. 2.15 km SW of Cobb, California · 13072 days ago · 0 km deep · 5 km away
  5. 1.510 km W of Cobb, California · 13072 days ago · 0 km deep · 12 km away
  6. 2.27 km S of Cobb, California · 13072 days ago · 2 km deep · 1 km away
  7. 1.912 km ENE of Cloverdale, California · 13072 days ago · 1 km deep · 16 km away
  8. 1.80 km SE of Larkfield-Wikiup, California · 13072 days ago · 2 km deep · 27 km away
  9. 1.512 km ENE of Cloverdale, California · 13072 days ago · 0 km deep · 16 km away
  10. 1.812 km ENE of Cloverdale, California · 13072 days ago · -1 km deep · 16 km away
  11. 2.69 km NNE of Cloverdale, California · 13073 days ago · 2 km deep · 26 km away
  12. 2.012 km ENE of Cloverdale, California · 13073 days ago · 1 km deep · 16 km away
  13. 2.410 km W of Cobb, California · 13073 days ago · -1 km deep · 13 km away
  14. 1.79 km W of Cobb, California · 13073 days ago · 0 km deep · 12 km away
  15. 1.99 km W of Cobb, California · 13075 days ago · 1 km deep · 12 km away
  16. 1.63 km W of Cobb, California · 13075 days ago · 1 km deep · 9 km away
  17. 1.72 km E of Clearlake Oaks, California · 13075 days ago · -1 km deep · 31 km away
  18. 1.71 km E of Talmage, California · 13075 days ago · 5 km deep · 56 km away
  19. 2.53 km SSW of Cobb, California · 13075 days ago · 1 km deep · 5 km away
  20. 1.621 km N of Upper Lake, California · 13076 days ago · 7 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc204026. Read Mon, Oct 5, 2026, 2:24 AM UTC.