California earthquakes

M1.7 earthquake 10km NNE of Angwin, CA

A magnitude 1.7 earthquake struck 10km NNE of Angwin, CA on Wed, Aug 4, 2021, 12:30 AM PDT (07:30 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.8 4km ENE of Talmage, CA. This one was a foreshock.

Angwin 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-08-04 07:30:00 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
38.663° N, 122.403° 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, 0.4 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
91°
Stations used
48

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 140 in the 60 days after this one and 100 in the 30 days before it.

After

  1. 1.59km SE of Sea Ranch, CA · 1886 days ago · 5 km deep · 86 km away
  2. 1.63km WSW of Cobb, CA · 1886 days ago · 2 km deep · 35 km away
  3. 1.87km S of Muir Beach, CA · 1886 days ago · 13 km deep · 98 km away
  4. 1.715km SE of Lake Pillsbury, CA · 1885 days ago · 2 km deep · 81 km away
  5. 1.95km WNW of Cobb, CA · 1885 days ago · 2 km deep · 38 km away
  6. 1.54km E of Moraga, CA · 1885 days ago · 3 km deep · 96 km away
  7. 1.52km ESE of Berkeley, CA · 1884 days ago · 4 km deep · 89 km away
  8. 1.64km E of Cloverdale, CA · 1884 days ago · 0 km deep · 52 km away · felt by 3
  9. 1.68km NW of The Geysers, CA · 1882 days ago · 2 km deep · 41 km away
  10. 2.212km ESE of Hidden Valley Lake, CA · 1881 days ago · 10 km deep · 12 km away
  11. 2.01km NNW of Pleasant Hill, CA · 1881 days ago · 11 km deep · 84 km away · felt by 12
  12. 1.88km NW of The Geysers, CA · 1880 days ago · 2 km deep · 41 km away
  13. 1.88km NW of The Geysers, CA · 1880 days ago · 2 km deep · 41 km away
  14. 1.810km NE of Napa, CA · 1879 days ago · 13 km deep · 39 km away
  15. 1.84km NNW of The Geysers, CA · 1879 days ago · 2 km deep · 37 km away
  16. 1.73km E of The Geysers, CA · 1879 days ago · 1 km deep · 31 km away
  17. 1.612km ESE of Hidden Valley Lake, CA · 1879 days ago · 8 km deep · 11 km away
  18. 2.32km WNW of Tomales, CA · 1879 days ago · 4 km deep · 64 km away · felt by 17
  19. 1.61km NE of Berkeley, CA · 1878 days ago · 6 km deep · 88 km away
  20. 1.67km NW of The Geysers, CA · 1877 days ago · 2 km deep · 40 km away · felt by 2
  21. 1.819km NE of Upper Lake, CA · 1877 days ago · 8 km deep · 75 km away · felt by 1
  22. 1.66km NW of The Geysers, CA · 1876 days ago · 3 km deep · 40 km away
  23. 1.58km SW of Calistoga, CA · 1876 days ago · 9 km deep · 26 km away
  24. 2.46km N of Cobb, CA · 1875 days ago · 3 km deep · 37 km away · felt by 10
  25. 1.78km NW of The Geysers, CA · 1875 days ago · 2 km deep · 40 km away
  26. 2.413km NE of Yountville, CA · 1875 days ago · 5 km deep · 22 km away · felt by 1
  27. 1.81km ENE of Alamo, CA · 1874 days ago · 13 km deep · 96 km away
  28. 1.513km E of Angwin, CA · 1874 days ago · 3 km deep · 15 km away
  29. 2.512km ESE of Angwin, CA · 1874 days ago · 0 km deep · 15 km away · felt by 5
  30. 1.75km NW of The Geysers, CA · 1874 days ago · 3 km deep · 38 km away
  31. 1.62km NNE of The Geysers, CA · 1872 days ago · 1 km deep · 34 km away
  32. 1.82km SSW of Bodega Bay, CA · 1871 days ago · 11 km deep · 69 km away
  33. 1.82km SSW of Bodega Bay, CA · 1871 days ago · 10 km deep · 68 km away
  34. 2.12km SSW of Bodega Bay, CA · 1871 days ago · 10 km deep · 69 km away
  35. 1.74km SSE of The Geysers, CA · 1871 days ago · 1 km deep · 31 km away · felt by 1
  36. 2.41km ESE of The Geysers, CA · 1870 days ago · 2 km deep · 32 km away
  37. 1.911km SW of The Geysers, CA · 1870 days ago · 6 km deep · 39 km away
  38. 1.511km SW of The Geysers, CA · 1870 days ago · 6 km deep · 39 km away
  39. 1.86km WNW of The Geysers, CA · 1870 days ago · 3 km deep · 39 km away
  40. 2.28km WNW of Cobb, CA · 1868 days ago · 2 km deep · 40 km away
  41. 2.07km W of Calistoga, CA · 1867 days ago · 8 km deep · 24 km away · felt by 8
  42. 1.77km WSW of St. Helena, CA · 1866 days ago · 8 km deep · 23 km away
  43. 1.611km NE of Napa, CA · 1865 days ago · 10 km deep · 39 km away
  44. 2.43km W of Anderson Springs, CA · 1865 days ago · 2 km deep · 30 km away
  45. 2.44km S of Talmage, CA · 1864 days ago · 8 km deep · 82 km away · felt by 7
  46. 2.510km NW of The Geysers, CA · 1864 days ago · 2 km deep · 43 km away
  47. 1.83km SW of Alamo, CA · 1864 days ago · 12 km deep · 97 km away
  48. 1.65km W of Cobb, CA · 1863 days ago · 1 km deep · 37 km away
  49. 2.53km ESE of Larkfield-Wikiup, CA · 1863 days ago · 7 km deep · 33 km away · felt by 122
  50. 1.57km WSW of St. Helena, CA · 1863 days ago · 9 km deep · 24 km away
  51. 2.14km S of Larkfield-Wikiup, CA · 1863 days ago · 7 km deep · 36 km away · felt by 5
  52. 1.91km WNW of The Geysers, CA · 1863 days ago · 1 km deep · 34 km away
  53. 1.66km NW of The Geysers, CA · 1862 days ago · 3 km deep · 39 km away
  54. 1.59km WNW of Cobb, CA · 1862 days ago · 2 km deep · 41 km away
  55. 1.97km NW of The Geysers, CA · 1861 days ago · 2 km deep · 40 km away
  56. 2.73km WNW of Cobb, CA · 1861 days ago · 0 km deep · 36 km away · felt by 6
  57. 2.23km WNW of Cobb, CA · 1861 days ago · 0 km deep · 36 km away
  58. 1.93km WNW of Cobb, CA · 1861 days ago · 0 km deep · 36 km away
  59. 1.63km WNW of Cobb, CA · 1861 days ago · 0 km deep · 36 km away
  60. 1.91km NNE of The Geysers, CA · 1861 days ago · 2 km deep · 33 km away

The first 60 of 140.

Before

  1. 2.04km E of Cloverdale, CA · 1887 days ago · 0 km deep · 52 km away · felt by 1
  2. 1.810km E of Clearlake, CA · 1887 days ago · 3 km deep · 36 km away
  3. 2.616km E of Willows, CA · 1888 days ago · 25 km deep · 100 km away · felt by 1
  4. 2.15km SSE of Cloverdale, CA · 1888 days ago · 3 km deep · 53 km away · felt by 10
  5. 1.82km ESE of Redwood Valley, CA · 1888 days ago · 7 km deep · 95 km away
  6. 1.55km NW of The Geysers, CA · 1889 days ago · 2 km deep · 38 km away
  7. 2.43km W of Anderson Springs, CA · 1889 days ago · 1 km deep · 30 km away
  8. 1.72km W of Anderson Springs, CA · 1889 days ago · 2 km deep · 30 km away · felt by 1
  9. 2.111km NE of Healdsburg, CA · 1889 days ago · 6 km deep · 32 km away · felt by 2
  10. 1.610km ENE of Hidden Valley Lake, CA · 1890 days ago · 9 km deep · 21 km away
  11. 2.16km W of Cobb, CA · 1890 days ago · 2 km deep · 38 km away
  12. 3.25km NNW of The Geysers, CA · 1890 days ago · 3 km deep · 38 km away · felt by 34
  13. 2.46km NW of The Geysers, CA · 1891 days ago · 2 km deep · 38 km away
  14. 1.97km ESE of Lake Pillsbury, CA · 1891 days ago · 4 km deep · 90 km away
  15. 2.26km NW of The Geysers, CA · 1892 days ago · 3 km deep · 39 km away
  16. 1.76km NW of The Geysers, CA · 1892 days ago · 3 km deep · 39 km away
  17. 1.97km NW of The Geysers, CA · 1892 days ago · 3 km deep · 39 km away
  18. 2.57km NW of The Geysers, CA · 1892 days ago · 3 km deep · 39 km away · felt by 4
  19. 1.58km WNW of Cobb, CA · 1892 days ago · 1 km deep · 41 km away
  20. 1.84km W of Cobb, CA · 1892 days ago · 2 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73605541. Read Sat, Oct 3, 2026, 6:06 PM UTC.