California earthquakes

M1.8 earthquake 7km SW of San Ardo, CA

A magnitude 1.8 earthquake struck 7km SW of San Ardo, CA on Sat, Jul 31, 2021, 4:29 AM PDT (11:29 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.0 6km NW of Pinnacles, CA. This one was a foreshock.

San Ardo 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
2021-07-31 11:29:42 UTC
Depth
9.9 km (6.2 mi), shallow
Epicenter
35.973° N, 120.955° 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, 0.6 km in depth
Magnitude uncertainty
±0.23
Depth from
From location
Station coverage gap
72°
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: 104 in the 60 days after this one and 38 in the 30 days before it.

After

  1. 2.77km NNW of Cholame, CA · 1890 days ago · 9 km deep · 60 km away · felt by 3
  2. 2.320km SW of New Idria, CA · 1890 days ago · 10 km deep · 39 km away
  3. 2.212km NW of Pinnacles, CA · 1888 days ago · 5 km deep · 76 km away
  4. 1.712km NW of Pinnacles, CA · 1888 days ago · 5 km deep · 76 km away
  5. 1.68km WNW of Greenfield, CA · 1888 days ago · 8 km deep · 53 km away
  6. 1.72km ENE of Pinnacles, CA · 1887 days ago · 3 km deep · 65 km away
  7. 1.517km NE of Pinnacles, CA · 1887 days ago · 9 km deep · 74 km away
  8. 1.72km NNE of Pinnacles, CA · 1887 days ago · 9 km deep · 66 km away
  9. 2.13km NNW of Pinnacles, CA · 1886 days ago · 4 km deep · 68 km away
  10. 2.89km WNW of Templeton, CA · 1884 days ago · 6 km deep · 46 km away
  11. 2.012km NW of Pinnacles, CA · 1884 days ago · 6 km deep · 75 km away
  12. 2.33km SE of San Ardo, CA · 1883 days ago · 10 km deep · 7 km away
  13. 1.923km SE of Pinnacles, CA · 1883 days ago · 10 km deep · 45 km away
  14. 1.720km NW of Parkfield, CA · 1881 days ago · 4 km deep · 34 km away
  15. 1.95km NE of Pinnacles, CA · 1881 days ago · 9 km deep · 68 km away
  16. 1.616km SE of Pinnacles, CA · 1880 days ago · 3 km deep · 52 km away
  17. 1.923km NNE of San Ardo, CA · 1880 days ago · 9 km deep · 30 km away
  18. 1.513km WNW of Huron, CA · 1880 days ago · 10 km deep · 70 km away
  19. 1.78km WNW of Huron, CA · 1878 days ago · 10 km deep · 74 km away
  20. 1.96km NNE of Pinnacles, CA · 1878 days ago · 9 km deep · 68 km away
  21. 1.912km SSW of Cantua Creek, CA · 1877 days ago · 2 km deep · 72 km away
  22. 2.510km NNW of Pinnacles, CA · 1876 days ago · 5 km deep · 74 km away · felt by 1
  23. 2.010km NNW of Pinnacles, CA · 1876 days ago · 5 km deep · 74 km away
  24. 2.210km NNW of Pinnacles, CA · 1876 days ago · 6 km deep · 74 km away
  25. 2.710km NNW of Pinnacles, CA · 1876 days ago · 6 km deep · 75 km away · felt by 5
  26. 1.69km ENE of Pinnacles, CA · 1876 days ago · 4 km deep · 66 km away
  27. 2.110km SSW of Stratford, CA · 1876 days ago · 2 km deep · 99 km away
  28. 2.04km ESE of Pinnacles, CA · 1875 days ago · 11 km deep · 62 km away · felt by 1
  29. 2.113km NW of Parkfield, CA · 1875 days ago · 10 km deep · 38 km away
  30. 1.92km WNW of Tres Pinos, CA · 1874 days ago · 9 km deep · 98 km away
  31. 2.62km SSE of Parkfield, CA · 1874 days ago · 6 km deep · 49 km away · felt by 3
  32. 2.410km NW of Pinnacles, CA · 1873 days ago · 3 km deep · 74 km away · felt by 2
  33. 2.112km W of Cantua Creek, CA · 1873 days ago · 17 km deep · 73 km away
  34. 3.016km ENE of New Idria, CA · 1873 days ago · 16 km deep · 68 km away · felt by 5
  35. 2.99km SW of Tres Pinos, CA · 1873 days ago · 3 km deep · 93 km away · felt by 8
  36. 2.419km NNW of San Simeon, CA · 1872 days ago · 8 km deep · 34 km away
  37. 1.97km NNE of Greenfield, CA · 1872 days ago · 4 km deep · 51 km away · felt by 1
  38. 1.82km ENE of Cayucos, CA · 1871 days ago · 0 km deep · 59 km away
  39. 3.15km S of Ridgemark, CA · 1869 days ago · 9 km deep · 96 km away · felt by 17
  40. 2.03km ENE of Lopez Point, CA · 1869 days ago · 9 km deep · 52 km away
  41. 1.96km ESE of Pinnacles, CA · 1869 days ago · 6 km deep · 60 km away
  42. 1.817km N of New Idria, CA · 1867 days ago · 10 km deep · 71 km away
  43. 1.65km NW of Parkfield, CA · 1867 days ago · 5 km deep · 43 km away
  44. 1.624km SSW of Los Banos, CA · 1867 days ago · 2 km deep · 100 km away
  45. 1.619km NNW of Coalinga, CA · 1867 days ago · 8 km deep · 56 km away
  46. 1.824km SSW of Los Banos, CA · 1867 days ago · 6 km deep · 100 km away
  47. 1.931km WNW of San Simeon, CA · 1866 days ago · 6 km deep · 60 km away
  48. 1.925km SSW of South Dos Palos, CA · 1866 days ago · 2 km deep · 89 km away
  49. 1.722km NW of San Simeon, CA · 1866 days ago · 4 km deep · 39 km away
  50. 1.827km NW of San Simeon, CA · 1865 days ago · 10 km deep · 42 km away
  51. 1.923km NW of Parkfield, CA · 1864 days ago · 6 km deep · 30 km away · felt by 1
  52. 1.825km NW of Parkfield, CA · 1863 days ago · 5 km deep · 31 km away
  53. 2.012km NW of Pinnacles, CA · 1863 days ago · 5 km deep · 76 km away
  54. 1.923km NNW of San Simeon, CA · 1863 days ago · 12 km deep · 36 km away
  55. 2.11km NE of Pinnacles, CA · 1863 days ago · 9 km deep · 65 km away
  56. 1.720km SW of New Idria, CA · 1861 days ago · 10 km deep · 37 km away
  57. 1.77km ENE of Pinnacles, CA · 1861 days ago · 12 km deep · 66 km away · felt by 1
  58. 1.57km NNW of Cholame, CA · 1861 days ago · 4 km deep · 61 km away
  59. 1.813km N of San Simeon, CA · 1861 days ago · 9 km deep · 32 km away
  60. 1.88km NW of Pinnacles, CA · 1861 days ago · 7 km deep · 71 km away · felt by 2

The first 60 of 104.

Before

  1. 1.719km SSE of Lopez Point, CA · 1890 days ago · 3 km deep · 49 km away
  2. 1.730km NE of Pinnacles, CA · 1891 days ago · 5 km deep · 79 km away
  3. 2.515km WSW of Cantua Creek, CA · 1891 days ago · 18 km deep · 70 km away
  4. 2.39km SSW of San Lucas, CA · 1891 days ago · 11 km deep · 13 km away
  5. 2.27km NNW of Pinnacles, CA · 1892 days ago · 5 km deep · 71 km away
  6. 2.315km SE of Tres Pinos, CA · 1892 days ago · 9 km deep · 84 km away · felt by 2
  7. 2.319km NW of Parkfield, CA · 1892 days ago · 4 km deep · 34 km away · felt by 2
  8. 3.47km NNW of Cholame, CA · 1893 days ago · 9 km deep · 60 km away · felt by 24
  9. 1.511km WSW of Huron, CA · 1895 days ago · 8 km deep · 70 km away
  10. 1.512km S of Tres Pinos, CA · 1896 days ago · 4 km deep · 86 km away
  11. 2.22km NNE of Carmel Valley Village, CA · 1897 days ago · 10 km deep · 94 km away · felt by 1
  12. 2.517km SSE of Lopez Point, CA · 1898 days ago · 12 km deep · 49 km away · felt by 4
  13. 2.612km NW of Parkfield, CA · 1898 days ago · 8 km deep · 39 km away · felt by 4
  14. 1.97km WNW of Paso Robles, CA · 1899 days ago · 8 km deep · 41 km away
  15. 2.28km NW of Cantua Creek, CA · 1900 days ago · 6 km deep · 84 km away
  16. 2.46km NNW of Cholame, CA · 1901 days ago · 8 km deep · 61 km away
  17. 1.79km NW of Pinnacles, CA · 1902 days ago · 8 km deep · 73 km away
  18. 2.616km NW of Pinnacles, CA · 1904 days ago · 5 km deep · 79 km away · felt by 3
  19. 1.712km E of Coalinga, CA · 1905 days ago · 7 km deep · 68 km away
  20. 1.82km NE of Pinnacles, CA · 1906 days ago · 9 km deep · 65 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73603131. Read Sat, Oct 3, 2026, 2:20 PM UTC.