California earthquakes

M1.8 earthquake 4km W of Cobb, CA

A magnitude 1.8 earthquake struck 4km W of Cobb, CA on Thu, Jul 29, 2021, 7:08 AM PDT (14:08 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-07-29 14:08:30 UTC
Depth
2.3 km (1.4 mi), shallow
Epicenter
38.823° N, 122.765° 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, 0.3 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
45°
Stations used
0

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 106 in the 30 days before it.

After

  1. 1.58km WNW of Cobb, CA · 1892 days ago · 1 km deep · 5 km away
  2. 2.57km NW of The Geysers, CA · 1892 days ago · 3 km deep · 3 km away · felt by 4
  3. 1.97km NW of The Geysers, CA · 1892 days ago · 3 km deep · 3 km away
  4. 1.76km NW of The Geysers, CA · 1892 days ago · 3 km deep · 3 km away
  5. 2.26km NW of The Geysers, CA · 1892 days ago · 3 km deep · 3 km away
  6. 1.97km ESE of Lake Pillsbury, CA · 1892 days ago · 4 km deep · 63 km away
  7. 2.46km NW of The Geysers, CA · 1891 days ago · 2 km deep · 3 km away
  8. 3.25km NNW of The Geysers, CA · 1890 days ago · 3 km deep · 2 km away · felt by 34
  9. 2.16km W of Cobb, CA · 1890 days ago · 2 km deep · 2 km away
  10. 1.610km ENE of Hidden Valley Lake, CA · 1890 days ago · 9 km deep · 27 km away
  11. 2.012km WNW of Alder Springs, CA · 1890 days ago · 3 km deep · 95 km away
  12. 2.712km WNW of Alder Springs, CA · 1890 days ago · -1 km deep · 95 km away
  13. 3.012km WNW of Alder Springs, CA · 1890 days ago · 0 km deep · 96 km away · felt by 1
  14. 1.713km WNW of Alder Springs, CA · 1890 days ago · -1 km deep · 95 km away
  15. 1.912km WNW of Alder Springs, CA · 1890 days ago · 1 km deep · 95 km away
  16. 2.111km NE of Healdsburg, CA · 1890 days ago · 6 km deep · 17 km away · felt by 2
  17. 2.212km WNW of Alder Springs, CA · 1889 days ago · 6 km deep · 95 km away
  18. 1.72km W of Anderson Springs, CA · 1889 days ago · 2 km deep · 7 km away · felt by 1
  19. 2.43km W of Anderson Springs, CA · 1889 days ago · 1 km deep · 6 km away
  20. 1.55km NW of The Geysers, CA · 1889 days ago · 2 km deep · 3 km away
  21. 2.210km WNW of Alder Springs, CA · 1889 days ago · 4 km deep · 95 km away
  22. 2.012km WNW of Alder Springs, CA · 1889 days ago · 7 km deep · 95 km away
  23. 1.82km ESE of Redwood Valley, CA · 1888 days ago · 7 km deep · 61 km away
  24. 2.15km SSE of Cloverdale, CA · 1888 days ago · 3 km deep · 22 km away · felt by 10
  25. 2.512km W of Alder Springs, CA · 1888 days ago · 5 km deep · 95 km away · felt by 1
  26. 2.113km WNW of Alder Springs, CA · 1888 days ago · 1 km deep · 95 km away
  27. 2.711km W of Alder Springs, CA · 1888 days ago · 6 km deep · 95 km away · felt by 1
  28. 2.112km W of Alder Springs, CA · 1888 days ago · 4 km deep · 95 km away
  29. 2.012km W of Alder Springs, CA · 1888 days ago · 4 km deep · 94 km away · felt by 1
  30. 3.712km W of Alder Springs, CA · 1888 days ago · 8 km deep · 95 km away · felt by 5
  31. 2.612km WNW of Alder Springs, CA · 1888 days ago · 2 km deep · 95 km away
  32. 2.812km W of Alder Springs, CA · 1888 days ago · 2 km deep · 95 km away
  33. 1.812km W of Alder Springs, CA · 1888 days ago · 0 km deep · 95 km away
  34. 2.112km W of Alder Springs, CA · 1888 days ago · 4 km deep · 94 km away
  35. 2.113km W of Alder Springs, CA · 1888 days ago · 1 km deep · 94 km away
  36. 1.913km W of Alder Springs, CA · 1888 days ago · 1 km deep · 94 km away
  37. 2.112km W of Alder Springs, CA · 1888 days ago · 6 km deep · 94 km away
  38. 2.912km W of Alder Springs, CA · 1888 days ago · 1 km deep · 95 km away
  39. 2.712km W of Alder Springs, CA · 1888 days ago · 4 km deep · 94 km away
  40. 1.712km W of Alder Springs, CA · 1888 days ago · 3 km deep · 94 km away
  41. 1.913km W of Alder Springs, CA · 1888 days ago · 3 km deep · 94 km away
  42. 2.411km W of Alder Springs, CA · 1888 days ago · 3 km deep · 94 km away
  43. 2.413km WNW of Alder Springs, CA · 1888 days ago · 10 km deep · 95 km away
  44. 2.212km W of Alder Springs, CA · 1888 days ago · 0 km deep · 94 km away
  45. 1.912km WNW of Alder Springs, CA · 1888 days ago · 0 km deep · 95 km away
  46. 2.110km W of Alder Springs, CA · 1888 days ago · 0 km deep · 94 km away
  47. 1.813km W of Alder Springs, CA · 1888 days ago · 3 km deep · 95 km away
  48. 1.713km W of Alder Springs, CA · 1888 days ago · 0 km deep · 94 km away
  49. 1.812km W of Alder Springs, CA · 1888 days ago · 2 km deep · 94 km away
  50. 1.812km W of Alder Springs, CA · 1888 days ago · 2 km deep · 94 km away
  51. 1.912km W of Alder Springs, CA · 1888 days ago · 7 km deep · 94 km away
  52. 2.713km W of Alder Springs, CA · 1888 days ago · 1 km deep · 94 km away · felt by 1
  53. 2.113km W of Alder Springs, CA · 1888 days ago · 5 km deep · 94 km away
  54. 2.912km W of Alder Springs, CA · 1888 days ago · 2 km deep · 94 km away · felt by 2
  55. 1.913km W of Alder Springs, CA · 1888 days ago · 3 km deep · 94 km away
  56. 1.810km E of Clearlake, CA · 1888 days ago · 3 km deep · 27 km away
  57. 1.911km WNW of Alder Springs, CA · 1887 days ago · 0 km deep · 95 km away
  58. 2.412km W of Alder Springs, CA · 1887 days ago · 2 km deep · 94 km away
  59. 2.012km W of Alder Springs, CA · 1887 days ago · 4 km deep · 94 km away
  60. 2.112km W of Alder Springs, CA · 1887 days ago · 0 km deep · 95 km away

The first 60 of 197.

Before

  1. 1.76km WNW of Cobb, CA · 1892 days ago · 2 km deep · 3 km away
  2. 1.87km WNW of Cobb, CA · 1893 days ago · 1 km deep · 4 km away
  3. 1.73km NW of The Geysers, CA · 1893 days ago · -1 km deep · 3 km away
  4. 2.32km NNW of The Geysers, CA · 1893 days ago · 0 km deep · 3 km away
  5. 2.13km SSW of Anderson Springs, CA · 1893 days ago · 4 km deep · 10 km away
  6. 2.23km S of Anderson Springs, CA · 1893 days ago · 2 km deep · 11 km away
  7. 1.94km NW of The Geysers, CA · 1893 days ago · -1 km deep · 4 km away
  8. 3.06km NNW of Guerneville, CA · 1893 days ago · 6 km deep · 37 km away · felt by 201
  9. 2.07km ESE of Willits, CA · 1894 days ago · 7 km deep · 77 km away
  10. 2.511km WNW of Alder Springs, CA · 1894 days ago · 5 km deep · 95 km away
  11. 1.614km NE of Redwood Valley, CA · 1894 days ago · 3 km deep · 68 km away
  12. 2.011km W of Alder Springs, CA · 1894 days ago · 5 km deep · 94 km away
  13. 2.17km NW of The Geysers, CA · 1894 days ago · -1 km deep · 3 km away
  14. 2.511km W of Alder Springs, CA · 1895 days ago · 1 km deep · 94 km away
  15. 1.73km NW of The Geysers, CA · 1895 days ago · 0 km deep · 3 km away
  16. 2.16km SSW of Calistoga, CA · 1895 days ago · 9 km deep · 36 km away · felt by 4
  17. 3.211km W of Alder Springs, CA · 1896 days ago · 5 km deep · 94 km away · felt by 9
  18. 1.77km NW of The Geysers, CA · 1897 days ago · 2 km deep · 4 km away
  19. 2.811km W of Alder Springs, CA · 1897 days ago · 0 km deep · 94 km away
  20. 2.311km W of Alder Springs, CA · 1897 days ago · 2 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73601761. Read Sat, Oct 3, 2026, 8:07 PM UTC.