California earthquakes

M1.6 earthquake 5km W of Cobb, CA

A magnitude 1.6 earthquake struck 5km W of Cobb, CA on Fri, Aug 27, 2021, 8:12 AM PDT (15:12 UTC), 1 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
2021-08-27 15:12:29 UTC
Depth
1.4 km (0.9 mi), shallow
Epicenter
38.822° N, 122.784° 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, 0.2 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
32°
Stations used
46

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 191 in the 60 days after this one and 150 in the 30 days before it.

After

  1. 2.53km ESE of Larkfield-Wikiup, CA · 1863 days ago · 7 km deep · 36 km away · felt by 122
  2. 1.57km WSW of St. Helena, CA · 1863 days ago · 9 km deep · 44 km away
  3. 2.14km S of Larkfield-Wikiup, CA · 1863 days ago · 7 km deep · 38 km away · felt by 5
  4. 1.91km WNW of The Geysers, CA · 1863 days ago · 1 km deep · 5 km away
  5. 1.66km NW of The Geysers, CA · 1862 days ago · 3 km deep · 3 km away
  6. 1.59km WNW of Cobb, CA · 1862 days ago · 2 km deep · 4 km away
  7. 1.97km NW of The Geysers, CA · 1862 days ago · 2 km deep · 3 km away
  8. 1.69km E of Willits, CA · 1861 days ago · 8 km deep · 76 km away
  9. 2.73km WNW of Cobb, CA · 1861 days ago · 0 km deep · 2 km away · felt by 6
  10. 2.23km WNW of Cobb, CA · 1861 days ago · 0 km deep · 2 km away
  11. 1.93km WNW of Cobb, CA · 1861 days ago · 0 km deep · 3 km away
  12. 1.63km WNW of Cobb, CA · 1861 days ago · 0 km deep · 2 km away
  13. 1.714km NNE of Brooktrails, CA · 1861 days ago · 9 km deep · 96 km away
  14. 1.91km NNE of The Geysers, CA · 1861 days ago · 2 km deep · 5 km away
  15. 1.95km NW of The Geysers, CA · 1861 days ago · 2 km deep · 2 km away
  16. 2.16km NW of The Geysers, CA · 1860 days ago · 3 km deep · 2 km away
  17. 2.514km W of Williams, CA · 1860 days ago · 21 km deep · 56 km away
  18. 1.73km ENE of The Geysers, CA · 1860 days ago · 2 km deep · 6 km away
  19. 1.810km NNE of Windsor, CA · 1860 days ago · 7 km deep · 23 km away
  20. 3.04km ENE of Talmage, CA · 1859 days ago · 9 km deep · 46 km away · felt by 122
  21. 1.88km NNE of Black Point-Green Point, CA · 1859 days ago · 8 km deep · 77 km away
  22. 1.512km WNW of The Geysers, CA · 1859 days ago · 2 km deep · 8 km away
  23. 1.610km WNW of The Geysers, CA · 1859 days ago · 2 km deep · 6 km away
  24. 1.69km WNW of Cobb, CA · 1858 days ago · 2 km deep · 4 km away
  25. 1.73km SW of Angwin, CA · 1858 days ago · 4 km deep · 39 km away
  26. 1.77km W of Cobb, CA · 1858 days ago · 2 km deep · 2 km away
  27. 3.84km ENE of Talmage, CA · 1857 days ago · 9 km deep · 46 km away · felt by 316
  28. 1.92km WNW of Cobb, CA · 1856 days ago · 1 km deep · 3 km away
  29. 1.72km SW of Cobb, CA · 1856 days ago · 2 km deep · 4 km away
  30. 1.813km WNW of Alder Springs, CA · 1856 days ago · 3 km deep · 96 km away
  31. 1.513km N of Brooktrails, CA · 1856 days ago · 8 km deep · 98 km away
  32. 1.74km ENE of Talmage, CA · 1856 days ago · 6 km deep · 46 km away
  33. 3.74km ENE of Talmage, CA · 1855 days ago · 10 km deep · 46 km away · felt by 199
  34. 2.21km NW of The Geysers, CA · 1854 days ago · 2 km deep · 4 km away
  35. 1.62km NW of The Geysers, CA · 1854 days ago · 2 km deep · 4 km away
  36. 1.57km S of Calistoga, CA · 1853 days ago · 8 km deep · 37 km away
  37. 2.31km NNW of The Geysers, CA · 1853 days ago · 1 km deep · 5 km away
  38. 3.17km NW of The Geysers, CA · 1853 days ago · 2 km deep · 3 km away · felt by 2
  39. 2.56km NW of The Geysers, CA · 1853 days ago · 3 km deep · 3 km away · felt by 1
  40. 2.07km NW of The Geysers, CA · 1853 days ago · 3 km deep · 3 km away
  41. 1.66km WNW of The Geysers, CA · 1853 days ago · 2 km deep · 4 km away
  42. 1.59km WNW of Cobb, CA · 1853 days ago · 2 km deep · 4 km away
  43. 1.83km SW of Anderson Springs, CA · 1852 days ago · 2 km deep · 9 km away · felt by 1
  44. 1.57km W of Cobb, CA · 1851 days ago · 2 km deep · 3 km away
  45. 1.77km NW of The Geysers, CA · 1851 days ago · 3 km deep · 3 km away
  46. 1.87km ENE of Brooktrails, CA · 1851 days ago · 6 km deep · 86 km away
  47. 2.15km NW of The Geysers, CA · 1851 days ago · 2 km deep · 2 km away
  48. 2.36km W of Cobb, CA · 1850 days ago · 3 km deep · 1 km away
  49. 1.76km WNW of Cobb, CA · 1850 days ago · 2 km deep · 2 km away
  50. 1.63km SSE of Redwood Valley, CA · 1850 days ago · 6 km deep · 59 km away
  51. 2.05km ENE of Talmage, CA · 1848 days ago · 9 km deep · 46 km away
  52. 1.714km W of Redwood Valley, CA · 1848 days ago · 5 km deep · 71 km away
  53. 2.55km NW of The Geysers, CA · 1848 days ago · 2 km deep · 1 km away
  54. 1.710km NNW of Redwood Valley, CA · 1846 days ago · 8 km deep · 70 km away
  55. 1.610km WNW of Calistoga, CA · 1845 days ago · 4 km deep · 26 km away · felt by 1
  56. 1.86km W of Allendale, CA · 1845 days ago · 21 km deep · 79 km away
  57. 1.712km SE of Point Arena, CA · 1843 days ago · 4 km deep · 69 km away
  58. 1.83km ENE of The Geysers, CA · 1843 days ago · 1 km deep · 6 km away
  59. 2.01km WNW of Stony Gorge Reservoir, CA · 1843 days ago · 13 km deep · 88 km away
  60. 2.45km WNW of The Geysers, CA · 1843 days ago · 4 km deep · 4 km away

The first 60 of 191.

Before

  1. 2.510km NW of The Geysers, CA · 1864 days ago · 2 km deep · 5 km away
  2. 2.44km S of Talmage, CA · 1864 days ago · 8 km deep · 45 km away · felt by 7
  3. 2.43km W of Anderson Springs, CA · 1865 days ago · 2 km deep · 7 km away
  4. 1.611km NE of Napa, CA · 1865 days ago · 10 km deep · 74 km away
  5. 1.77km WSW of St. Helena, CA · 1866 days ago · 8 km deep · 42 km away
  6. 1.98km WNW of Point Arena, CA · 1866 days ago · 6 km deep · 88 km away
  7. 1.813km W of Alder Springs, CA · 1867 days ago · 2 km deep · 94 km away · felt by 1
  8. 2.07km W of Calistoga, CA · 1867 days ago · 8 km deep · 30 km away · felt by 8
  9. 2.28km WNW of Cobb, CA · 1868 days ago · 2 km deep · 3 km away
  10. 1.86km WNW of The Geysers, CA · 1870 days ago · 3 km deep · 4 km away
  11. 1.511km SW of The Geysers, CA · 1870 days ago · 6 km deep · 14 km away
  12. 2.112km WNW of Alder Springs, CA · 1870 days ago · 3 km deep · 95 km away
  13. 1.911km SW of The Geysers, CA · 1870 days ago · 6 km deep · 13 km away
  14. 2.41km ESE of The Geysers, CA · 1870 days ago · 2 km deep · 7 km away
  15. 1.74km SSE of The Geysers, CA · 1871 days ago · 1 km deep · 9 km away · felt by 1
  16. 2.12km SSW of Bodega Bay, CA · 1871 days ago · 10 km deep · 61 km away
  17. 1.82km SSW of Bodega Bay, CA · 1871 days ago · 10 km deep · 61 km away
  18. 1.82km SSW of Bodega Bay, CA · 1872 days ago · 11 km deep · 61 km away
  19. 1.62km NNE of The Geysers, CA · 1872 days ago · 1 km deep · 4 km away
  20. 1.88km NNW of Redwood Valley, CA · 1873 days ago · 1 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73616456. Read Sat, Oct 3, 2026, 8:11 PM UTC.