California earthquakes

M1.6 earthquake 9km WNW of Cobb, CA

A magnitude 1.6 earthquake struck 9km WNW of Cobb, CA on Wed, Sep 1, 2021, 3:20 AM PDT (10:20 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.8 4km ENE of Talmage, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-09-01 10:20:38 UTC
Depth
2.3 km (1.4 mi), shallow
Epicenter
38.840° N, 122.823° 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 0.1 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
65°
Stations used
45

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 177 in the 60 days after this one and 143 in the 30 days before it.

After

  1. 1.73km SW of Angwin, CA · 1859 days ago · 4 km deep · 43 km away
  2. 1.77km W of Cobb, CA · 1859 days ago · 2 km deep · 2 km away
  3. 3.84km ENE of Talmage, CA · 1858 days ago · 9 km deep · 43 km away · felt by 316
  4. 1.92km WNW of Cobb, CA · 1858 days ago · 1 km deep · 6 km away
  5. 1.72km SW of Cobb, CA · 1857 days ago · 2 km deep · 8 km away
  6. 1.813km WNW of Alder Springs, CA · 1857 days ago · 3 km deep · 94 km away
  7. 1.513km N of Brooktrails, CA · 1857 days ago · 8 km deep · 94 km away
  8. 1.74km ENE of Talmage, CA · 1857 days ago · 6 km deep · 43 km away
  9. 3.74km ENE of Talmage, CA · 1856 days ago · 10 km deep · 42 km away · felt by 199
  10. 2.21km NW of The Geysers, CA · 1855 days ago · 2 km deep · 8 km away
  11. 1.62km NW of The Geysers, CA · 1855 days ago · 2 km deep · 8 km away
  12. 1.57km S of Calistoga, CA · 1855 days ago · 8 km deep · 41 km away
  13. 2.31km NNW of The Geysers, CA · 1854 days ago · 1 km deep · 8 km away
  14. 3.17km NW of The Geysers, CA · 1854 days ago · 2 km deep · 3 km away · felt by 2
  15. 2.56km NW of The Geysers, CA · 1854 days ago · 3 km deep · 3 km away · felt by 1
  16. 2.07km NW of The Geysers, CA · 1854 days ago · 3 km deep · 3 km away
  17. 1.66km WNW of The Geysers, CA · 1854 days ago · 2 km deep · 4 km away
  18. 1.59km WNW of Cobb, CA · 1854 days ago · 2 km deep · 0 km away
  19. 1.83km SW of Anderson Springs, CA · 1853 days ago · 2 km deep · 13 km away · felt by 1
  20. 1.57km W of Cobb, CA · 1853 days ago · 2 km deep · 1 km away
  21. 1.77km NW of The Geysers, CA · 1853 days ago · 3 km deep · 2 km away
  22. 1.87km ENE of Brooktrails, CA · 1852 days ago · 6 km deep · 82 km away
  23. 2.15km NW of The Geysers, CA · 1852 days ago · 2 km deep · 4 km away
  24. 2.36km W of Cobb, CA · 1851 days ago · 3 km deep · 3 km away
  25. 1.76km WNW of Cobb, CA · 1851 days ago · 2 km deep · 3 km away
  26. 1.63km SSE of Redwood Valley, CA · 1851 days ago · 6 km deep · 55 km away
  27. 2.05km ENE of Talmage, CA · 1850 days ago · 9 km deep · 43 km away
  28. 1.714km W of Redwood Valley, CA · 1849 days ago · 5 km deep · 68 km away
  29. 2.55km NW of The Geysers, CA · 1849 days ago · 2 km deep · 4 km away
  30. 1.710km NNW of Redwood Valley, CA · 1848 days ago · 8 km deep · 67 km away
  31. 1.610km WNW of Calistoga, CA · 1846 days ago · 4 km deep · 29 km away · felt by 1
  32. 1.86km W of Allendale, CA · 1846 days ago · 21 km deep · 83 km away
  33. 1.712km SE of Point Arena, CA · 1845 days ago · 4 km deep · 66 km away
  34. 1.83km ENE of The Geysers, CA · 1845 days ago · 1 km deep · 10 km away
  35. 2.01km WNW of Stony Gorge Reservoir, CA · 1844 days ago · 13 km deep · 87 km away
  36. 2.45km WNW of The Geysers, CA · 1844 days ago · 4 km deep · 5 km away
  37. 1.714km SE of Lake Pillsbury, CA · 1844 days ago · 1 km deep · 52 km away
  38. 1.510km W of Redwood Valley, CA · 1844 days ago · 5 km deep · 64 km away
  39. 1.614km NNE of Brooktrails, CA · 1843 days ago · 8 km deep · 92 km away
  40. 1.62km NW of Anderson Springs, CA · 1843 days ago · 2 km deep · 12 km away
  41. 1.913km W of Alder Springs, CA · 1843 days ago · 0 km deep · 91 km away
  42. 1.96km ESE of Lake Pillsbury, CA · 1843 days ago · 5 km deep · 61 km away
  43. 1.55km NW of The Geysers, CA · 1842 days ago · 3 km deep · 4 km away
  44. 2.09km WNW of The Geysers, CA · 1841 days ago · 2 km deep · 3 km away
  45. 1.50km WNW of The Geysers, CA · 1841 days ago · 1 km deep · 9 km away
  46. 1.66km NW of Boonville, CA · 1841 days ago · 0 km deep · 57 km away
  47. 1.83km SE of Larkfield-Wikiup, CA · 1839 days ago · 5 km deep · 39 km away · felt by 5
  48. 1.610km NE of Healdsburg, CA · 1839 days ago · 4 km deep · 20 km away
  49. 1.86km SE of Lake Pillsbury, CA · 1839 days ago · 2 km deep · 59 km away
  50. 2.63km NW of The Geysers, CA · 1838 days ago · 3 km deep · 6 km away · felt by 3
  51. 1.73km SW of Anderson Springs, CA · 1838 days ago · 2 km deep · 13 km away
  52. 1.76km NW of The Geysers, CA · 1837 days ago · 3 km deep · 3 km away
  53. 1.76km NW of The Geysers, CA · 1837 days ago · 3 km deep · 3 km away
  54. 1.73km NNW of The Geysers, CA · 1837 days ago · 1 km deep · 6 km away
  55. 2.71km SSE of Vallejo, CA · 1837 days ago · 11 km deep · 97 km away · felt by 481
  56. 1.63km SW of Anderson Springs, CA · 1835 days ago · 2 km deep · 13 km away
  57. 2.012km ESE of Boonville, CA · 1835 days ago · 0 km deep · 39 km away
  58. 2.322km N of Lake Pillsbury, CA · 1835 days ago · 13 km deep · 87 km away · felt by 2
  59. 1.63km SE of The Geysers, CA · 1834 days ago · 2 km deep · 12 km away
  60. 1.76km SW of Calistoga, CA · 1832 days ago · 8 km deep · 38 km away

The first 60 of 177.

Before

  1. 1.610km WNW of The Geysers, CA · 1860 days ago · 2 km deep · 3 km away
  2. 1.512km WNW of The Geysers, CA · 1860 days ago · 2 km deep · 5 km away
  3. 1.88km NNE of Black Point-Green Point, CA · 1860 days ago · 8 km deep · 80 km away
  4. 3.04km ENE of Talmage, CA · 1860 days ago · 9 km deep · 42 km away · felt by 122
  5. 1.810km NNE of Windsor, CA · 1861 days ago · 7 km deep · 25 km away
  6. 1.73km ENE of The Geysers, CA · 1861 days ago · 2 km deep · 10 km away
  7. 2.514km W of Williams, CA · 1861 days ago · 21 km deep · 58 km away
  8. 2.16km NW of The Geysers, CA · 1861 days ago · 3 km deep · 3 km away
  9. 1.95km NW of The Geysers, CA · 1862 days ago · 2 km deep · 4 km away
  10. 1.91km NNE of The Geysers, CA · 1862 days ago · 2 km deep · 9 km away
  11. 1.714km NNE of Brooktrails, CA · 1862 days ago · 9 km deep · 92 km away
  12. 1.63km WNW of Cobb, CA · 1862 days ago · 0 km deep · 6 km away
  13. 1.93km WNW of Cobb, CA · 1862 days ago · 0 km deep · 6 km away
  14. 2.23km WNW of Cobb, CA · 1862 days ago · 0 km deep · 6 km away
  15. 2.73km WNW of Cobb, CA · 1862 days ago · 0 km deep · 6 km away · felt by 6
  16. 1.69km E of Willits, CA · 1862 days ago · 8 km deep · 73 km away
  17. 1.97km NW of The Geysers, CA · 1863 days ago · 2 km deep · 2 km away
  18. 1.59km WNW of Cobb, CA · 1863 days ago · 2 km deep · 0 km away
  19. 1.66km NW of The Geysers, CA · 1863 days ago · 3 km deep · 3 km away
  20. 1.91km WNW of The Geysers, CA · 1864 days ago · 1 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73618731. Read Sun, Oct 4, 2026, 11:50 PM UTC.