California earthquakes

M1.8 earthquake 31km E of Avalon, CA

A magnitude 1.8 earthquake struck 31km E of Avalon, CA on Mon, Apr 19, 2021, 4:07 PM PDT (23:07 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.5 5km WSW of Hermosa Beach, CA. This one was a foreshock.

Avalon 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 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-04-19 23:07:28 UTC
Depth
14.5 km (9.0 mi), shallow
Epicenter
33.305° N, 118.001° 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 0.4 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
164°
Stations used
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 64 in the 30 days before it.

After

  1. 1.811km E of Yorba Linda, CA · 1993 days ago · 9 km deep · 70 km away
  2. 1.51km SE of Marina del Rey, CA · 1993 days ago · 10 km deep · 85 km away
  3. 2.42km E of Commerce, CA · 1993 days ago · 18 km deep · 78 km away
  4. 1.61km N of Wildomar, CA · 1990 days ago · 6 km deep · 75 km away
  5. 2.330 km WSW of Avalon, California · 1987 days ago · 10 km deep · 60 km away
  6. 2.31km N of Lennox, CA · 1986 days ago · 21 km deep · 78 km away
  7. 2.10km N of Lennox, CA · 1986 days ago · 21 km deep · 78 km away · felt by 1
  8. 1.83km WNW of Lennox, CA · 1986 days ago · 21 km deep · 80 km away
  9. 1.71km ENE of Lennox, CA · 1986 days ago · 19 km deep · 77 km away
  10. 2.21km N of Lennox, CA · 1986 days ago · 20 km deep · 78 km away
  11. 1.90km SW of Lennox, CA · 1986 days ago · 21 km deep · 77 km away
  12. 1.61km W of Sierra Madre, CA · 1985 days ago · 9 km deep · 95 km away
  13. 1.63km ESE of Garden Grove, CA · 1983 days ago · 14 km deep · 52 km away
  14. 1.919km S of Malibu, CA · 1982 days ago · 19 km deep · 94 km away
  15. 2.446km SSW of Dana Point, CA · 1980 days ago · 4 km deep · 24 km away
  16. 2.67km WSW of Hermosa Beach, CA · 1979 days ago · 13 km deep · 73 km away · felt by 115
  17. 2.26km NW of Mira Loma, CA · 1977 days ago · 7 km deep · 90 km away · felt by 46
  18. 1.611km ENE of North Tustin, CA · 1977 days ago · 8 km deep · 63 km away
  19. 3.013km S of San Clemente Is. (NW tip), CA · 1977 days ago · 6 km deep · 71 km away · felt by 1
  20. 1.76km WSW of Manhattan Beach, CA · 1975 days ago · 11 km deep · 75 km away
  21. 3.55km WSW of Hermosa Beach, CA · 1975 days ago · 12 km deep · 73 km away · felt by 2,359
  22. 2.55km WSW of Hermosa Beach, CA · 1974 days ago · 13 km deep · 73 km away · felt by 156
  23. 1.714km SSW of Seal Beach, CA · 1974 days ago · 12 km deep · 37 km away
  24. 1.64km SE of Chino Hills, CA · 1972 days ago · 14 km deep · 77 km away
  25. 1.67km NNW of Mira Loma, CA · 1967 days ago · 12 km deep · 92 km away
  26. 1.511km E of Yorba Linda, CA · 1966 days ago · 8 km deep · 69 km away
  27. 1.64km SW of Rancho Cucamonga, CA · 1966 days ago · 12 km deep · 96 km away
  28. 2.111km E of Yorba Linda, CA · 1957 days ago · 10 km deep · 69 km away · felt by 1
  29. 2.63km E of Anaheim, CA · 1956 days ago · 5 km deep · 60 km away · felt by 419
  30. 2.14km E of Anaheim, CA · 1955 days ago · 6 km deep · 61 km away · felt by 52
  31. 1.54km E of Anaheim, CA · 1955 days ago · 5 km deep · 61 km away
  32. 1.54km E of Anaheim, CA · 1955 days ago · 5 km deep · 61 km away
  33. 2.73km E of Anaheim, CA · 1952 days ago · 5 km deep · 60 km away · felt by 384
  34. 1.73km E of Anaheim, CA · 1952 days ago · 5 km deep · 60 km away
  35. 2.04km NW of Villa Park, CA · 1952 days ago · 4 km deep · 61 km away · felt by 12
  36. 2.911km S of Malibu Beach, CA · 1952 days ago · 14 km deep · 94 km away · felt by 109
  37. 1.711km E of Yorba Linda, CA · 1950 days ago · 9 km deep · 69 km away
  38. 1.94km ESE of Gardena, CA · 1950 days ago · 15 km deep · 68 km away
  39. 1.63km E of Gardena, CA · 1950 days ago · 13 km deep · 69 km away
  40. 1.77km ENE of Yorba Linda, CA · 1947 days ago · 10 km deep · 73 km away
  41. 1.92km SSW of Rancho Cucamonga, CA · 1947 days ago · 10 km deep · 97 km away
  42. 2.23km WSW of Rubidoux, CA · 1946 days ago · 16 km deep · 92 km away · felt by 1
  43. 1.73km E of Anaheim, CA · 1945 days ago · 5 km deep · 60 km away
  44. 1.83km E of Anaheim, CA · 1945 days ago · 5 km deep · 60 km away · felt by 9
  45. 1.82km WNW of Murrieta, CA · 1944 days ago · 16 km deep · 76 km away
  46. 1.63km WSW of Yorba Linda, CA · 1943 days ago · 7 km deep · 65 km away · felt by 2
  47. 1.95km NW of Huntington Beach, CA · 1942 days ago · 14 km deep · 46 km away · felt by 2
  48. 1.811km W of Corona, CA · 1942 days ago · 9 km deep · 69 km away
  49. 1.94km NW of Villa Park, CA · 1941 days ago · 3 km deep · 61 km away · felt by 4
  50. 1.62km WNW of Lennox, CA · 1940 days ago · 13 km deep · 79 km away
  51. 1.62km N of Claremont, CA · 1940 days ago · 4 km deep · 94 km away
  52. 1.84km NW of Villa Park, CA · 1940 days ago · 5 km deep · 61 km away
  53. 2.84km WSW of Hermosa Beach, CA · 1934 days ago · 11 km deep · 73 km away · felt by 589

Before

  1. 1.518km S of Malibu Beach, CA · 1994 days ago · 17 km deep · 90 km away
  2. 1.69km W of Palomar Observatory, CA · 1995 days ago · 9 km deep · 96 km away
  3. 1.69km W of Palomar Observatory, CA · 1995 days ago · 8 km deep · 96 km away
  4. 2.110km W of Palomar Observatory, CA · 1995 days ago · 8 km deep · 96 km away · felt by 5
  5. 2.01km NNE of Laguna Beach, CA · 1997 days ago · 14 km deep · 34 km away
  6. 1.716km S of Malibu Beach, CA · 2004 days ago · 13 km deep · 89 km away
  7. 1.93km WNW of Lennox, CA · 2007 days ago · 22 km deep · 79 km away
  8. 2.21km NNW of Lennox, CA · 2007 days ago · 21 km deep · 79 km away · felt by 3
  9. 1.61km SE of Lennox, CA · 2007 days ago · 23 km deep · 77 km away
  10. 2.11km SSW of Inglewood, CA · 2008 days ago · 19 km deep · 79 km away · felt by 3
  11. 2.31km NE of Lennox, CA · 2008 days ago · 19 km deep · 78 km away
  12. 1.62km NW of Lennox, CA · 2008 days ago · 22 km deep · 79 km away
  13. 1.62km WSW of Inglewood, CA · 2008 days ago · 22 km deep · 80 km away
  14. 2.30km ENE of Lennox, CA · 2008 days ago · 21 km deep · 77 km away
  15. 1.70km W of Lennox, CA · 2008 days ago · 23 km deep · 78 km away
  16. 1.61km S of Inglewood, CA · 2008 days ago · 21 km deep · 78 km away
  17. 1.92km E of Lennox, CA · 2008 days ago · 19 km deep · 77 km away · felt by 14
  18. 1.82km ESE of Inglewood, CA · 2008 days ago · 16 km deep · 78 km away · felt by 8
  19. 1.61km ENE of Inglewood, CA · 2008 days ago · 15 km deep · 79 km away · felt by 4
  20. 2.01km SE of Lennox, CA · 2008 days ago · 21 km deep · 77 km away · felt by 19

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39856720. Read Sun, Oct 4, 2026, 2:44 PM UTC.