California earthquakes

M1.8 earthquake 3km S of Cobb, CA

A magnitude 1.8 earthquake struck 3km S of Cobb, CA on Wed, Dec 23, 2020, 8:46 AM PST (16:46 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.9 15km E of Willows, CA. 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2020-12-23 16:46:10 UTC
Depth
2.6 km (1.6 mi), shallow
Epicenter
38.795° N, 122.724° 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, 1.0 km in depth
Depth from
From location
Station coverage gap
136°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 97 in the 30 days before it.

After

  1. 1.55km NNE of Windsor, CA · 2110 days ago · 1 km deep · 24 km away
  2. 1.63km NNW of The Geysers, CA · 2110 days ago · 4 km deep · 4 km away
  3. 1.65km NW of The Geysers, CA · 2110 days ago · 4 km deep · 6 km away
  4. 1.79km NW of The Geysers, CA · 2110 days ago · 2 km deep · 10 km away
  5. 2.82km NNW of The Geysers, CA · 2109 days ago · 1 km deep · 4 km away · felt by 5
  6. 1.87km WNW of The Geysers, CA · 2108 days ago · 2 km deep · 9 km away
  7. 1.916km W of Ukiah, CA · 2108 days ago · 4 km deep · 72 km away
  8. 2.02km S of Anderson Springs, CA · 2108 days ago · 1 km deep · 5 km away · felt by 1
  9. 1.913km W of Lakeport, CA · 2107 days ago · 4 km deep · 40 km away
  10. 1.84km N of Redwood Valley, CA · 2107 days ago · 6 km deep · 70 km away
  11. 1.66km NNW of The Geysers, CA · 2107 days ago · 1 km deep · 6 km away
  12. 1.79km WNW of Cobb, CA · 2107 days ago · 2 km deep · 10 km away
  13. 1.66km NNW of The Geysers, CA · 2107 days ago · 1 km deep · 6 km away
  14. 2.211km ESE of Willits, CA · 2107 days ago · 7 km deep · 78 km away
  15. 3.915km E of Willows, CA · 2107 days ago · 26 km deep · 100 km away · felt by 624
  16. 2.216km E of Willows, CA · 2107 days ago · 24 km deep · 100 km away · felt by 45
  17. 1.810km ESE of Willits, CA · 2106 days ago · 7 km deep · 78 km away
  18. 1.94km NNW of The Geysers, CA · 2104 days ago · 0 km deep · 5 km away
  19. 2.31km E of The Geysers, CA · 2104 days ago · 0 km deep · 3 km away
  20. 2.72km NW of The Geysers, CA · 2104 days ago · 1 km deep · 4 km away · felt by 5
  21. 3.69km WNW of Cobb, CA · 2103 days ago · 2 km deep · 10 km away · felt by 219
  22. 1.59km NW of The Geysers, CA · 2103 days ago · 2 km deep · 10 km away
  23. 1.89km WNW of Cobb, CA · 2103 days ago · 2 km deep · 10 km away
  24. 1.69km NW of The Geysers, CA · 2103 days ago · 1 km deep · 10 km away
  25. 2.60km E of San Pablo, CA · 2103 days ago · 5 km deep · 98 km away · felt by 271
  26. 1.68km NW of The Geysers, CA · 2102 days ago · 2 km deep · 9 km away
  27. 1.710km ESE of Redwood Valley, CA · 2102 days ago · 7 km deep · 59 km away
  28. 1.68km WNW of Cobb, CA · 2102 days ago · 1 km deep · 10 km away
  29. 1.83km WNW of Cobb, CA · 2102 days ago · 0 km deep · 5 km away
  30. 1.610km ESE of Willits, CA · 2101 days ago · 6 km deep · 78 km away
  31. 1.78km WSW of Upper Lake, CA · 2101 days ago · 9 km deep · 44 km away · felt by 1
  32. 2.12km E of The Geysers, CA · 2101 days ago · 1 km deep · 2 km away · felt by 1
  33. 1.73km NE of The Geysers, CA · 2100 days ago · 0 km deep · 1 km away
  34. 1.63km S of Cobb, CA · 2098 days ago · 2 km deep · 1 km away
  35. 2.66km WSW of Glen Ellen, CA · 2098 days ago · 7 km deep · 52 km away · felt by 16
  36. 2.26km WSW of Glen Ellen, CA · 2098 days ago · 7 km deep · 52 km away · felt by 1
  37. 2.38km NNE of Healdsburg, CA · 2098 days ago · 7 km deep · 16 km away · felt by 7
  38. 1.710km SE of Willits, CA · 2098 days ago · 5 km deep · 78 km away
  39. 1.68km NW of The Geysers, CA · 2097 days ago · 2 km deep · 8 km away · felt by 9
  40. 1.95km W of Cobb, CA · 2097 days ago · 1 km deep · 6 km away · felt by 2
  41. 1.68km W of Cobb, CA · 2096 days ago · 2 km deep · 9 km away
  42. 1.810km ESE of Willits, CA · 2096 days ago · 7 km deep · 78 km away
  43. 1.74km S of Redwood Valley, CA · 2095 days ago · 6 km deep · 64 km away
  44. 1.61km NW of The Geysers, CA · 2094 days ago · 2 km deep · 4 km away
  45. 1.63km NE of The Geysers, CA · 2092 days ago · 0 km deep · 1 km away
  46. 1.75km WNW of Cobb, CA · 2092 days ago · 2 km deep · 7 km away
  47. 1.95km S of Boonville, CA · 2091 days ago · 0 km deep · 59 km away
  48. 2.214km W of Lakeport, CA · 2090 days ago · 2 km deep · 40 km away · felt by 1
  49. 1.914km E of Yountville, CA · 2090 days ago · 10 km deep · 63 km away · felt by 1
  50. 1.74km SSW of Anderson Springs, CA · 2090 days ago · 2 km deep · 5 km away
  51. 1.67km W of Cobb, CA · 2089 days ago · 2 km deep · 8 km away
  52. 1.63km SSW of Anderson Springs, CA · 2088 days ago · 2 km deep · 5 km away
  53. 1.610km WNW of The Geysers, CA · 2088 days ago · 3 km deep · 12 km away
  54. 2.73km NE of The Geysers, CA · 2086 days ago · 2 km deep · 1 km away · felt by 2
  55. 1.61km E of The Geysers, CA · 2086 days ago · 0 km deep · 3 km away
  56. 1.813km NNE of Brooktrails, CA · 2085 days ago · 9 km deep · 100 km away
  57. 1.63km WNW of Cobb, CA · 2085 days ago · 1 km deep · 5 km away
  58. 2.414km W of Lakeport, CA · 2085 days ago · 1 km deep · 39 km away
  59. 1.614km W of Lakeport, CA · 2085 days ago · 1 km deep · 39 km away
  60. 2.815km W of Lakeport, CA · 2085 days ago · 1 km deep · 40 km away · felt by 18

The first 60 of 165.

Before

  1. 1.610km NNE of Brooktrails, CA · 2111 days ago · 7 km deep · 98 km away
  2. 2.21km WNW of The Geysers, CA · 2111 days ago · 1 km deep · 4 km away
  3. 2.44km NNW of Redwood Valley, CA · 2111 days ago · 7 km deep · 71 km away · felt by 6
  4. 2.018km NE of Sea Ranch, CA · 2112 days ago · 6 km deep · 51 km away
  5. 1.718km ESE of Boonville, CA · 2112 days ago · 4 km deep · 42 km away
  6. 1.77km W of Cobb, CA · 2112 days ago · 2 km deep · 8 km away
  7. 2.50km SE of Rollingwood, CA · 2113 days ago · 5 km deep · 99 km away · felt by 68
  8. 1.56km NW of The Geysers, CA · 2113 days ago · 3 km deep · 8 km away
  9. 1.60km SE of Rollingwood, CA · 2114 days ago · 5 km deep · 99 km away
  10. 1.76km WNW of The Geysers, CA · 2114 days ago · 2 km deep · 9 km away
  11. 1.62km NNE of The Geysers, CA · 2115 days ago · 2 km deep · 2 km away
  12. 1.85km ESE of Boonville, CA · 2116 days ago · 5 km deep · 55 km away
  13. 1.59km WNW of Cobb, CA · 2116 days ago · 1 km deep · 10 km away
  14. 1.79km WNW of Cobb, CA · 2116 days ago · 2 km deep · 10 km away
  15. 1.98km NW of The Geysers, CA · 2116 days ago · 2 km deep · 9 km away
  16. 2.014km W of Lakeport, CA · 2116 days ago · 4 km deep · 40 km away · felt by 1
  17. 1.77km W of Cobb, CA · 2117 days ago · 2 km deep · 8 km away · felt by 1
  18. 1.512km W of Lakeport, CA · 2117 days ago · 7 km deep · 39 km away
  19. 1.710km WNW of The Geysers, CA · 2117 days ago · 2 km deep · 12 km away
  20. 1.72km NNE of Redwood Valley, CA · 2117 days ago · 7 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73501930. Read Sun, Oct 4, 2026, 5:55 AM UTC.