California earthquakes

M1.8 earthquake 7km WNW of Cobb, CA

A magnitude 1.8 earthquake struck 7km WNW of Cobb, CA on Wed, Jul 28, 2021, 11:32 PM PDT (06:32 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-07-29 06:32:22 UTC
Depth
0.9 km (0.6 mi), shallow
Epicenter
38.848° N, 122.793° 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
±0.23
Depth from
From location
Station coverage gap
71°
Stations used
43

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 103 in the 30 days before it.

After

  1. 1.76km WNW of Cobb, CA · 1893 days ago · 2 km deep · 1 km away
  2. 1.84km W of Cobb, CA · 1893 days ago · 2 km deep · 4 km away
  3. 1.58km WNW of Cobb, CA · 1893 days ago · 1 km deep · 2 km away
  4. 2.57km NW of The Geysers, CA · 1893 days ago · 3 km deep · 3 km away · felt by 4
  5. 1.97km NW of The Geysers, CA · 1893 days ago · 3 km deep · 3 km away
  6. 1.76km NW of The Geysers, CA · 1893 days ago · 3 km deep · 3 km away
  7. 2.26km NW of The Geysers, CA · 1892 days ago · 3 km deep · 3 km away
  8. 1.97km ESE of Lake Pillsbury, CA · 1892 days ago · 4 km deep · 60 km away
  9. 2.46km NW of The Geysers, CA · 1892 days ago · 2 km deep · 3 km away
  10. 3.25km NNW of The Geysers, CA · 1891 days ago · 3 km deep · 4 km away · felt by 34
  11. 2.16km W of Cobb, CA · 1891 days ago · 2 km deep · 3 km away
  12. 1.610km ENE of Hidden Valley Lake, CA · 1891 days ago · 9 km deep · 29 km away
  13. 2.012km WNW of Alder Springs, CA · 1891 days ago · 3 km deep · 92 km away
  14. 2.712km WNW of Alder Springs, CA · 1891 days ago · -1 km deep · 92 km away
  15. 3.012km WNW of Alder Springs, CA · 1891 days ago · 0 km deep · 93 km away · felt by 1
  16. 1.713km WNW of Alder Springs, CA · 1891 days ago · -1 km deep · 92 km away
  17. 1.912km WNW of Alder Springs, CA · 1891 days ago · 1 km deep · 92 km away
  18. 2.111km NE of Healdsburg, CA · 1890 days ago · 6 km deep · 20 km away · felt by 2
  19. 2.212km WNW of Alder Springs, CA · 1890 days ago · 6 km deep · 92 km away
  20. 1.72km W of Anderson Springs, CA · 1890 days ago · 2 km deep · 10 km away · felt by 1
  21. 2.43km W of Anderson Springs, CA · 1890 days ago · 1 km deep · 10 km away
  22. 1.55km NW of The Geysers, CA · 1890 days ago · 2 km deep · 4 km away
  23. 2.210km WNW of Alder Springs, CA · 1890 days ago · 4 km deep · 92 km away
  24. 2.012km WNW of Alder Springs, CA · 1890 days ago · 7 km deep · 92 km away
  25. 1.82km ESE of Redwood Valley, CA · 1889 days ago · 7 km deep · 57 km away
  26. 2.15km SSE of Cloverdale, CA · 1889 days ago · 3 km deep · 20 km away · felt by 10
  27. 2.512km W of Alder Springs, CA · 1889 days ago · 5 km deep · 92 km away · felt by 1
  28. 2.113km WNW of Alder Springs, CA · 1889 days ago · 1 km deep · 92 km away
  29. 2.711km W of Alder Springs, CA · 1889 days ago · 6 km deep · 92 km away · felt by 1
  30. 2.112km W of Alder Springs, CA · 1889 days ago · 4 km deep · 92 km away
  31. 2.012km W of Alder Springs, CA · 1889 days ago · 4 km deep · 91 km away · felt by 1
  32. 3.712km W of Alder Springs, CA · 1889 days ago · 8 km deep · 92 km away · felt by 5
  33. 2.612km WNW of Alder Springs, CA · 1889 days ago · 2 km deep · 92 km away
  34. 2.812km W of Alder Springs, CA · 1889 days ago · 2 km deep · 92 km away
  35. 1.812km W of Alder Springs, CA · 1889 days ago · 0 km deep · 92 km away
  36. 2.112km W of Alder Springs, CA · 1889 days ago · 4 km deep · 91 km away
  37. 2.113km W of Alder Springs, CA · 1889 days ago · 1 km deep · 91 km away
  38. 1.913km W of Alder Springs, CA · 1889 days ago · 1 km deep · 91 km away
  39. 2.112km W of Alder Springs, CA · 1889 days ago · 6 km deep · 91 km away
  40. 2.912km W of Alder Springs, CA · 1889 days ago · 1 km deep · 92 km away
  41. 2.712km W of Alder Springs, CA · 1889 days ago · 4 km deep · 91 km away
  42. 1.712km W of Alder Springs, CA · 1889 days ago · 3 km deep · 91 km away
  43. 1.913km W of Alder Springs, CA · 1889 days ago · 3 km deep · 91 km away
  44. 2.411km W of Alder Springs, CA · 1889 days ago · 3 km deep · 91 km away
  45. 2.413km WNW of Alder Springs, CA · 1889 days ago · 10 km deep · 92 km away
  46. 2.212km W of Alder Springs, CA · 1889 days ago · 0 km deep · 91 km away
  47. 1.912km WNW of Alder Springs, CA · 1889 days ago · 0 km deep · 92 km away
  48. 2.110km W of Alder Springs, CA · 1889 days ago · 0 km deep · 91 km away
  49. 1.813km W of Alder Springs, CA · 1889 days ago · 3 km deep · 92 km away
  50. 1.713km W of Alder Springs, CA · 1889 days ago · 0 km deep · 91 km away
  51. 2.616km E of Willows, CA · 1889 days ago · 25 km deep · 100 km away · felt by 1
  52. 1.812km W of Alder Springs, CA · 1889 days ago · 2 km deep · 91 km away
  53. 1.812km W of Alder Springs, CA · 1889 days ago · 2 km deep · 91 km away
  54. 1.912km W of Alder Springs, CA · 1889 days ago · 7 km deep · 91 km away
  55. 2.713km W of Alder Springs, CA · 1889 days ago · 1 km deep · 91 km away · felt by 1
  56. 2.113km W of Alder Springs, CA · 1889 days ago · 5 km deep · 91 km away
  57. 2.912km W of Alder Springs, CA · 1888 days ago · 2 km deep · 91 km away · felt by 2
  58. 1.913km W of Alder Springs, CA · 1888 days ago · 3 km deep · 91 km away
  59. 1.810km E of Clearlake, CA · 1888 days ago · 3 km deep · 28 km away
  60. 1.911km WNW of Alder Springs, CA · 1888 days ago · 0 km deep · 92 km away

The first 60 of 197.

Before

  1. 1.73km NW of The Geysers, CA · 1893 days ago · -1 km deep · 6 km away
  2. 2.32km NNW of The Geysers, CA · 1893 days ago · 0 km deep · 7 km away
  3. 2.13km SSW of Anderson Springs, CA · 1893 days ago · 4 km deep · 13 km away
  4. 2.23km S of Anderson Springs, CA · 1893 days ago · 2 km deep · 14 km away
  5. 1.94km NW of The Geysers, CA · 1893 days ago · -1 km deep · 6 km away
  6. 3.06km NNW of Guerneville, CA · 1894 days ago · 6 km deep · 38 km away · felt by 201
  7. 2.07km ESE of Willits, CA · 1894 days ago · 7 km deep · 73 km away
  8. 2.511km WNW of Alder Springs, CA · 1894 days ago · 5 km deep · 92 km away
  9. 1.614km NE of Redwood Valley, CA · 1895 days ago · 3 km deep · 64 km away
  10. 2.011km W of Alder Springs, CA · 1895 days ago · 5 km deep · 92 km away
  11. 2.17km NW of The Geysers, CA · 1895 days ago · -1 km deep · 3 km away
  12. 2.511km W of Alder Springs, CA · 1895 days ago · 1 km deep · 91 km away
  13. 1.73km NW of The Geysers, CA · 1896 days ago · 0 km deep · 5 km away
  14. 2.16km SSW of Calistoga, CA · 1896 days ago · 9 km deep · 40 km away · felt by 4
  15. 3.211km W of Alder Springs, CA · 1897 days ago · 5 km deep · 91 km away · felt by 9
  16. 1.77km NW of The Geysers, CA · 1897 days ago · 2 km deep · 4 km away
  17. 2.811km W of Alder Springs, CA · 1898 days ago · 0 km deep · 91 km away
  18. 2.311km W of Alder Springs, CA · 1898 days ago · 2 km deep · 91 km away
  19. 1.611km ENE of Yountville, CA · 1898 days ago · 6 km deep · 67 km away
  20. 2.510km WNW of Alder Springs, CA · 1898 days ago · 1 km deep · 92 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73601586. Read Sun, Oct 4, 2026, 3:12 PM UTC.