California earthquakes

M1.5 earthquake 2km WSW of Costa Mesa, CA

A magnitude 1.5 earthquake struck 2km WSW of Costa Mesa, CA on Wed, Aug 4, 2021, 6:18 AM PDT (13:18 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.3 2km E of Carson, CA. This one was a foreshock.

Costa Mesa 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
1.5 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-08-04 13:18:08 UTC
Depth
10.4 km (6.5 mi), shallow
Epicenter
33.657° N, 117.937° 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 0.5 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
158°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 64 in the 60 days after this one and 31 in the 30 days before it.

After

  1. 3.12km NW of Hemet, CA · 1886 days ago · 17 km deep · 89 km away · felt by 573
  2. 1.95km N of Beaumont, CA · 1886 days ago · 13 km deep · 95 km away
  3. 1.63km S of Mentone, CA · 1886 days ago · 13 km deep · 86 km away
  4. 1.65km WNW of Muscoy, CA · 1885 days ago · 11 km deep · 77 km away
  5. 1.76km S of Calimesa, CA · 1884 days ago · 4 km deep · 87 km away
  6. 1.56km SSW of Redlands, CA · 1881 days ago · 14 km deep · 78 km away
  7. 2.013km SSE of Malibu Beach, CA · 1881 days ago · 10 km deep · 73 km away
  8. 2.53km WSW of Fontana, CA · 1878 days ago · 9 km deep · 63 km away · felt by 83
  9. 2.45km S of Redlands, CA · 1878 days ago · 14 km deep · 80 km away
  10. 1.81km NNW of La Puente, CA · 1875 days ago · 9 km deep · 41 km away
  11. 2.36km NNE of Beaumont, CA · 1874 days ago · 16 km deep · 97 km away
  12. 1.55km NNE of Fontana, CA · 1874 days ago · 7 km deep · 71 km away
  13. 1.64km N of Rancho Cucamonga, CA · 1870 days ago · 11 km deep · 65 km away
  14. 1.916km NNE of Avalon, CA · 1869 days ago · 17 km deep · 35 km away
  15. 1.94km NE of Temecula, CA · 1868 days ago · 9 km deep · 77 km away
  16. 1.83km SSE of Devore, CA · 1867 days ago · 12 km deep · 78 km away
  17. 2.34km NE of Beaumont, CA · 1866 days ago · 14 km deep · 97 km away · felt by 1
  18. 2.139km WSW of Encinitas, CA · 1863 days ago · 15 km deep · 80 km away
  19. 1.83km SSE of Garden Grove, CA · 1863 days ago · 15 km deep · 11 km away
  20. 1.56km S of Pearblossom, CA · 1862 days ago · 9 km deep · 88 km away · felt by 1
  21. 1.84km NW of Silver Lake, CA · 1861 days ago · 11 km deep · 61 km away · felt by 3
  22. 1.64km N of Fontana, CA · 1861 days ago · 6 km deep · 69 km away · felt by 2
  23. 1.74km N of Fontana, CA · 1861 days ago · 7 km deep · 69 km away
  24. 1.72km ESE of Loma Linda, CA · 1861 days ago · 14 km deep · 77 km away
  25. 2.03km E of Loma Linda, CA · 1859 days ago · 14 km deep · 79 km away
  26. 1.75km NNW of Beaumont, CA · 1858 days ago · 16 km deep · 93 km away
  27. 1.91km SSW of Malibu, CA · 1858 days ago · 13 km deep · 90 km away · felt by 2
  28. 1.730km SW of Dana Point, CA · 1857 days ago · 14 km deep · 38 km away
  29. 1.72km NNW of Inglewood, CA · 1856 days ago · 8 km deep · 52 km away · felt by 11
  30. 2.030km SW of Dana Point, CA · 1856 days ago · 13 km deep · 39 km away · felt by 2
  31. 1.64km SW of Highland, CA · 1856 days ago · 9 km deep · 81 km away
  32. 1.64km NE of Whittier, CA · 1855 days ago · 29 km deep · 39 km away
  33. 1.74km SE of Yucaipa, CA · 1855 days ago · 17 km deep · 94 km away · felt by 1
  34. 2.85km SSE of Malibu Beach, CA · 1854 days ago · 12 km deep · 77 km away · felt by 17
  35. 1.84km NE of Beaumont, CA · 1852 days ago · 14 km deep · 97 km away
  36. 2.65km SE of Loma Linda, CA · 1852 days ago · 15 km deep · 77 km away · felt by 5
  37. 2.65km NNE of Fontana, CA · 1851 days ago · 7 km deep · 70 km away · felt by 16
  38. 1.65km NNE of Fontana, CA · 1851 days ago · 7 km deep · 70 km away
  39. 2.63km NNW of La Verne, CA · 1850 days ago · 6 km deep · 54 km away · felt by 50
  40. 2.24km NE of Beaumont, CA · 1847 days ago · 17 km deep · 97 km away
  41. 1.85km NE of Wildomar, CA · 1846 days ago · 15 km deep · 64 km away · felt by 4
  42. 2.92km SSE of Lytle Creek, CA · 1846 days ago · 8 km deep · 77 km away · felt by 59
  43. 2.91km NNE of San Fernando, CA · 1846 days ago · 7 km deep · 85 km away · felt by 400
  44. 2.38km SSW of Pearblossom, CA · 1845 days ago · 8 km deep · 87 km away · felt by 3
  45. 1.629km WSW of Camp Pendleton South, CA · 1845 days ago · 11 km deep · 66 km away
  46. 2.76km N of Beaumont, CA · 1843 days ago · 16 km deep · 96 km away · felt by 6
  47. 2.35km NE of Wildomar, CA · 1843 days ago · 14 km deep · 65 km away · felt by 7
  48. 4.32km E of Carson, CA · 1843 days ago · 12 km deep · 36 km away · felt by 10,301 · tsunami flag
  49. 2.82km ESE of Carson, CA · 1842 days ago · 11 km deep · 36 km away · felt by 411
  50. 2.02km SE of Carson, CA · 1841 days ago · 11 km deep · 35 km away · felt by 70
  51. 2.50km ESE of Carson, CA · 1841 days ago · 11 km deep · 37 km away · felt by 160
  52. 1.62km E of Carson, CA · 1839 days ago · 9 km deep · 36 km away · felt by 14
  53. 1.64km SE of Rancho Cucamonga, CA · 1839 days ago · 14 km deep · 60 km away
  54. 2.61km ESE of Carson, CA · 1837 days ago · 7 km deep · 36 km away · felt by 762
  55. 1.97km ESE of San Pedro, CA · 1836 days ago · 9 km deep · 27 km away
  56. 1.86km WNW of Wrightwood, CA · 1835 days ago · 7 km deep · 84 km away
  57. 2.09km SW of Lytle Creek, CA · 1835 days ago · 8 km deep · 70 km away
  58. 2.39km N of Rancho Cucamonga, CA · 1835 days ago · 8 km deep · 69 km away · felt by 1
  59. 2.06km SW of Banning, CA · 1834 days ago · 7 km deep · 98 km away
  60. 1.85km NNW of Glen Avon, CA · 1833 days ago · 5 km deep · 59 km away · felt by 3

The first 60 of 64.

Before

  1. 1.913km W of Carlsbad, CA · 1887 days ago · 13 km deep · 71 km away
  2. 1.51km E of Beaumont, CA · 1888 days ago · 16 km deep · 94 km away
  3. 1.910km SSW of Rancho Palos Verdes, CA · 1889 days ago · 0 km deep · 45 km away
  4. 2.06km S of Redlands, CA · 1891 days ago · 14 km deep · 79 km away
  5. 1.62km ENE of Colton, CA · 1891 days ago · 16 km deep · 75 km away · felt by 1
  6. 3.04km SW of Redlands, CA · 1892 days ago · 15 km deep · 79 km away · felt by 153
  7. 2.743km WSW of Encinitas, CA · 1892 days ago · 14 km deep · 82 km away · felt by 5
  8. 2.10km W of Brea, CA · 1894 days ago · 8 km deep · 29 km away · felt by 4
  9. 1.61km NNW of South Gate, CA · 1896 days ago · 13 km deep · 43 km away
  10. 1.622km SSW of Seal Beach, CA · 1899 days ago · 13 km deep · 25 km away
  11. 2.54km SE of Ontario, CA · 1900 days ago · 16 km deep · 52 km away · felt by 6
  12. 1.76km NW of Corona, CA · 1900 days ago · 7 km deep · 41 km away
  13. 2.09km WSW of Lytle Creek, CA · 1901 days ago · 6 km deep · 71 km away · felt by 1
  14. 1.93km WSW of Compton, CA · 1901 days ago · 12 km deep · 38 km away
  15. 1.75km ENE of Villa Park, CA · 1903 days ago · 8 km deep · 26 km away
  16. 1.811km NNE of Trabuco Canyon, CA · 1904 days ago · 8 km deep · 39 km away
  17. 1.78km E of Yorba Linda, CA · 1905 days ago · 6 km deep · 32 km away
  18. 1.66km S of Malibu Beach, CA · 1906 days ago · 15 km deep · 79 km away
  19. 1.96km E of Calimesa, CA · 1906 days ago · 17 km deep · 95 km away
  20. 1.66km WSW of Aguanga, CA · 1906 days ago · 9 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39763559. Read Sun, Oct 4, 2026, 2:34 PM UTC.