California earthquakes

M1.9 earthquake 23km NNE of San Ardo, CA

A magnitude 1.9 earthquake struck 23km NNE of San Ardo, CA on Tue, Aug 10, 2021, 8:27 AM PDT (15:27 UTC), 9 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-08-10 15:27:39 UTC
Depth
8.9 km (5.5 mi), shallow
Epicenter
36.194° N, 120.765° 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 0.3 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
109°
Stations used
50

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 115 in the 60 days after this one and 56 in the 30 days before it.

After

  1. 1.513km WNW of Huron, CA · 1880 days ago · 10 km deep · 47 km away
  2. 1.78km WNW of Huron, CA · 1879 days ago · 10 km deep · 52 km away
  3. 1.96km NNE of Pinnacles, CA · 1878 days ago · 9 km deep · 52 km away
  4. 1.912km SSW of Cantua Creek, CA · 1878 days ago · 2 km deep · 43 km away
  5. 2.510km NNW of Pinnacles, CA · 1877 days ago · 5 km deep · 60 km away · felt by 1
  6. 2.010km NNW of Pinnacles, CA · 1877 days ago · 5 km deep · 60 km away
  7. 2.210km NNW of Pinnacles, CA · 1877 days ago · 6 km deep · 60 km away
  8. 2.710km NNW of Pinnacles, CA · 1877 days ago · 6 km deep · 60 km away · felt by 5
  9. 1.69km ENE of Pinnacles, CA · 1877 days ago · 4 km deep · 48 km away
  10. 2.110km SSW of Stratford, CA · 1877 days ago · 2 km deep · 81 km away
  11. 2.04km ESE of Pinnacles, CA · 1876 days ago · 11 km deep · 47 km away · felt by 1
  12. 2.113km NW of Parkfield, CA · 1875 days ago · 10 km deep · 32 km away
  13. 1.92km WNW of Tres Pinos, CA · 1875 days ago · 9 km deep · 85 km away
  14. 2.62km SSE of Parkfield, CA · 1875 days ago · 6 km deep · 46 km away · felt by 3
  15. 2.410km NW of Pinnacles, CA · 1874 days ago · 3 km deep · 61 km away · felt by 2
  16. 2.112km W of Cantua Creek, CA · 1874 days ago · 17 km deep · 43 km away
  17. 3.016km ENE of New Idria, CA · 1874 days ago · 16 km deep · 38 km away · felt by 5
  18. 2.99km SW of Tres Pinos, CA · 1873 days ago · 3 km deep · 82 km away · felt by 8
  19. 2.419km NNW of San Simeon, CA · 1873 days ago · 8 km deep · 63 km away
  20. 1.97km NNE of Greenfield, CA · 1872 days ago · 4 km deep · 45 km away · felt by 1
  21. 1.82km ENE of Cayucos, CA · 1871 days ago · 0 km deep · 84 km away
  22. 3.15km S of Ridgemark, CA · 1869 days ago · 9 km deep · 84 km away · felt by 17
  23. 2.03km ENE of Lopez Point, CA · 1869 days ago · 9 km deep · 71 km away
  24. 1.96km ESE of Pinnacles, CA · 1869 days ago · 6 km deep · 44 km away
  25. 1.817km N of New Idria, CA · 1868 days ago · 10 km deep · 42 km away
  26. 1.65km NW of Parkfield, CA · 1868 days ago · 5 km deep · 39 km away
  27. 1.624km SSW of Los Banos, CA · 1868 days ago · 2 km deep · 78 km away
  28. 1.619km NNW of Coalinga, CA · 1868 days ago · 8 km deep · 28 km away
  29. 1.824km SSW of Los Banos, CA · 1867 days ago · 6 km deep · 78 km away
  30. 1.931km WNW of San Simeon, CA · 1867 days ago · 6 km deep · 88 km away
  31. 1.925km SSW of South Dos Palos, CA · 1866 days ago · 2 km deep · 62 km away
  32. 1.722km NW of San Simeon, CA · 1866 days ago · 4 km deep · 67 km away
  33. 1.827km NW of San Simeon, CA · 1866 days ago · 10 km deep · 69 km away
  34. 1.923km NW of Parkfield, CA · 1864 days ago · 6 km deep · 21 km away · felt by 1
  35. 1.825km NW of Parkfield, CA · 1864 days ago · 5 km deep · 20 km away
  36. 2.111km SSW of Fairmead, CA · 1864 days ago · 18 km deep · 99 km away
  37. 2.012km NW of Pinnacles, CA · 1864 days ago · 5 km deep · 63 km away
  38. 1.923km NNW of San Simeon, CA · 1863 days ago · 12 km deep · 64 km away
  39. 2.11km NE of Pinnacles, CA · 1863 days ago · 9 km deep · 51 km away
  40. 1.720km SW of New Idria, CA · 1862 days ago · 10 km deep · 13 km away
  41. 1.77km ENE of Pinnacles, CA · 1862 days ago · 12 km deep · 49 km away · felt by 1
  42. 1.57km NNW of Cholame, CA · 1862 days ago · 4 km deep · 60 km away
  43. 1.813km N of San Simeon, CA · 1862 days ago · 9 km deep · 62 km away
  44. 1.88km NW of Pinnacles, CA · 1861 days ago · 7 km deep · 58 km away · felt by 2
  45. 1.74km N of Pinnacles, CA · 1861 days ago · 6 km deep · 54 km away
  46. 2.017km N of San Simeon, CA · 1860 days ago · 10 km deep · 61 km away
  47. 4.06km NW of Pinnacles, CA · 1860 days ago · 9 km deep · 57 km away · felt by 265 · tsunami flag
  48. 1.711km WSW of Templeton, CA · 1859 days ago · 6 km deep · 74 km away
  49. 2.19km SE of Pinnacles, CA · 1859 days ago · 6 km deep · 41 km away
  50. 1.58km NNW of Pinnacles, CA · 1856 days ago · 7 km deep · 58 km away
  51. 2.311km WSW of Morro Bay, CA · 1856 days ago · 10 km deep · 97 km away · felt by 2
  52. 1.913km SSE of Tres Pinos, CA · 1855 days ago · 6 km deep · 71 km away
  53. 1.722km SSE of Lopez Point, CA · 1854 days ago · 12 km deep · 72 km away
  54. 1.722km SSE of Lopez Point, CA · 1854 days ago · 10 km deep · 72 km away
  55. 2.515km SSE of Tres Pinos, CA · 1851 days ago · 5 km deep · 69 km away · felt by 3
  56. 1.67km NNW of Pinnacles, CA · 1851 days ago · 8 km deep · 58 km away
  57. 2.216km NW of Pinnacles, CA · 1850 days ago · 4 km deep · 67 km away
  58. 1.723km WSW of New Idria, CA · 1849 days ago · 8 km deep · 17 km away
  59. 2.17km NNW of Pinnacles, CA · 1849 days ago · 8 km deep · 58 km away
  60. 2.08km N of Pinnacles, CA · 1849 days ago · 9 km deep · 57 km away

The first 60 of 115.

Before

  1. 1.616km SE of Pinnacles, CA · 1881 days ago · 3 km deep · 35 km away
  2. 1.95km NE of Pinnacles, CA · 1882 days ago · 9 km deep · 52 km away
  3. 1.720km NW of Parkfield, CA · 1882 days ago · 4 km deep · 25 km away
  4. 1.73km SSW of San Juan Bautista, CA · 1883 days ago · 6 km deep · 99 km away
  5. 1.923km SE of Pinnacles, CA · 1884 days ago · 10 km deep · 27 km away
  6. 2.33km SE of San Ardo, CA · 1884 days ago · 10 km deep · 24 km away
  7. 1.74km NNW of Hollister, CA · 1884 days ago · 9 km deep · 96 km away
  8. 2.84km NNW of Hollister, CA · 1884 days ago · 9 km deep · 96 km away · felt by 12
  9. 2.012km NW of Pinnacles, CA · 1884 days ago · 6 km deep · 62 km away
  10. 2.89km WNW of Templeton, CA · 1885 days ago · 6 km deep · 68 km away
  11. 2.13km NNW of Pinnacles, CA · 1886 days ago · 4 km deep · 54 km away
  12. 1.72km NNE of Pinnacles, CA · 1887 days ago · 9 km deep · 52 km away
  13. 1.517km NE of Pinnacles, CA · 1888 days ago · 9 km deep · 54 km away
  14. 1.72km ENE of Pinnacles, CA · 1888 days ago · 3 km deep · 50 km away
  15. 1.68km WNW of Greenfield, CA · 1888 days ago · 8 km deep · 54 km away
  16. 1.712km NW of Pinnacles, CA · 1889 days ago · 5 km deep · 63 km away
  17. 2.212km NW of Pinnacles, CA · 1889 days ago · 5 km deep · 63 km away
  18. 3.02km NW of Hollister, CA · 1890 days ago · 7 km deep · 94 km away · felt by 83
  19. 1.52km NW of Hollister, CA · 1890 days ago · 7 km deep · 94 km away · felt by 1
  20. 2.83km NW of Hollister, CA · 1890 days ago · 7 km deep · 95 km away · felt by 90

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73608291. Read Sun, Oct 4, 2026, 5:59 AM UTC.