California earthquakes

M1.8 earthquake 4km WNW of Willowbrook, CA

A magnitude 1.8 earthquake struck 4km WNW of Willowbrook, CA on Mon, Apr 4, 1988, 4:01 PM PDT (23:01 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M3.2 2km NNW of Fontana, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.8 (Mc), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1988-04-04 23:01:28 UTC
Depth
14.1 km (8.8 mi), shallow
Epicenter
33.925° N, 118.297° 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.

Depth from
From location
Station coverage gap
150°
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: 102 in the 60 days after this one and 25 in the 30 days before it.

After

  1. 2.23km NNE of Norco, CA · 14058 days ago · 2 km deep · 71 km away
  2. 1.86km E of Ojai, CA · 14058 days ago · 11 km deep · 99 km away
  3. 1.66km S of Lytle Creek, CA · 14058 days ago · 13 km deep · 81 km away
  4. 2.71km ESE of Loma Linda, CA · 14057 days ago · 17 km deep · 98 km away
  5. 1.61km SSE of Loma Linda, CA · 14057 days ago · 18 km deep · 97 km away
  6. 2.12km S of Torrance, CA · 14056 days ago · 6 km deep · 13 km away
  7. 1.74km E of Lennox, CA · 14055 days ago · 6 km deep · 2 km away
  8. 2.413km SSE of Malibu Beach, CA · 14055 days ago · 13 km deep · 33 km away
  9. 2.65km SE of Lytle Creek, CA · 14052 days ago · 4 km deep · 83 km away
  10. 1.66km SSW of Lytle Creek, CA · 14052 days ago · 11 km deep · 78 km away
  11. 2.82km SSW of East Los Angeles, CA · 14051 days ago · 14 km deep · 15 km away
  12. 2.33km ESE of Whittier, CA · 14050 days ago · 4 km deep · 28 km away
  13. 2.832km S of Malibu, CA · 14050 days ago · 6 km deep · 47 km away
  14. 1.94km NNW of Glen Avon, CA · 14050 days ago · 3 km deep · 74 km away
  15. 1.72km E of Monterey Park, CA · 14049 days ago · 12 km deep · 23 km away
  16. 2.018km ENE of Ojai, CA · 14049 days ago · 11 km deep · 97 km away
  17. 1.616km ENE of Ojai, CA · 14049 days ago · 9 km deep · 99 km away
  18. 2.216km S of Malibu Beach, CA · 14048 days ago · 12 km deep · 36 km away
  19. 2.08km N of Fontana, CA · 14047 days ago · 10 km deep · 81 km away
  20. 1.95km WNW of Fontana, CA · 14046 days ago · 29 km deep · 76 km away
  21. 2.17km WNW of Lake Elsinore, CA · 14046 days ago · 10 km deep · 87 km away
  22. 2.216km WSW of Rancho Palos Verdes, CA · 14045 days ago · 3 km deep · 35 km away
  23. 2.35km WNW of Fontana, CA · 14045 days ago · 3 km deep · 76 km away
  24. 2.825km E of Santa Barbara Is., CA · 14044 days ago · 6 km deep · 71 km away
  25. 2.724km E of Santa Barbara Is., CA · 14044 days ago · 6 km deep · 72 km away
  26. 1.93km S of Loma Linda, CA · 14044 days ago · 7 km deep · 96 km away
  27. 1.83km SSE of Highland Park, CA · 14043 days ago · 8 km deep · 22 km away
  28. 2.211km NNE of Santa Paula, CA · 14043 days ago · 1 km deep · 89 km away
  29. 2.14km S of Loma Linda, CA · 14043 days ago · 3 km deep · 96 km away
  30. 2.34km S of Loma Linda, CA · 14043 days ago · 5 km deep · 96 km away
  31. 2.43km S of Loma Linda, CA · 14042 days ago · 5 km deep · 97 km away
  32. 2.41km SE of Hermosa Beach, CA · 14041 days ago · 4 km deep · 12 km away
  33. 2.33km SE of View Park-Windsor Hills, CA · 14040 days ago · 5 km deep · 7 km away
  34. 2.01km SSE of Devore, CA · 14040 days ago · 13 km deep · 89 km away
  35. 1.51km NNE of San Gabriel, CA · 14040 days ago · 10 km deep · 27 km away
  36. 1.75km SE of Lytle Creek, CA · 14039 days ago · 6 km deep · 84 km away
  37. 2.35km SE of Lytle Creek, CA · 14039 days ago · 7 km deep · 83 km away
  38. 1.65km SE of Lytle Creek, CA · 14039 days ago · 7 km deep · 84 km away
  39. 2.630km ESE of Avalon, CA · 14038 days ago · 6 km deep · 80 km away
  40. 2.85km SE of Lytle Creek, CA · 14037 days ago · 7 km deep · 83 km away
  41. 2.617km S of San Pedro, CA · 14036 days ago · 5 km deep · 38 km away
  42. 2.14km WSW of Lakewood, CA · 14036 days ago · 20 km deep · 15 km away
  43. 1.70km SSW of Loma Linda, CA · 14036 days ago · 17 km deep · 96 km away
  44. 2.25km SE of Lytle Creek, CA · 14036 days ago · 7 km deep · 83 km away
  45. 1.513km N of Castaic, CA · 14036 days ago · 5 km deep · 81 km away
  46. 2.24km WNW of March Air Reserve Base, CA · 14036 days ago · 11 km deep · 91 km away
  47. 1.714km WSW of Lake Hughes, CA · 14036 days ago · 10 km deep · 83 km away
  48. 2.11km NW of Rosemead, CA · 14036 days ago · 16 km deep · 27 km away
  49. 1.618km ENE of Santa Barbara Is., CA · 14035 days ago · 6 km deep · 69 km away
  50. 1.85km SE of Lytle Creek, CA · 14034 days ago · 7 km deep · 84 km away
  51. 2.05km SE of Lytle Creek, CA · 14034 days ago · 7 km deep · 83 km away
  52. 2.05km SE of Lytle Creek, CA · 14034 days ago · 7 km deep · 84 km away
  53. 1.75km SE of Lytle Creek, CA · 14034 days ago · 7 km deep · 83 km away
  54. 2.34km SE of Lytle Creek, CA · 14034 days ago · 3 km deep · 83 km away
  55. 1.74km SE of Lytle Creek, CA · 14034 days ago · 5 km deep · 84 km away
  56. 1.64km SE of Lytle Creek, CA · 14034 days ago · 5 km deep · 84 km away
  57. 2.06km NE of Fontana, CA · 14033 days ago · 7 km deep · 84 km away
  58. 2.81km WSW of San Gabriel, CA · 14032 days ago · 5 km deep · 25 km away
  59. 2.02km WNW of Temple City, CA · 14032 days ago · 4 km deep · 29 km away
  60. 1.88km N of Fontana, CA · 14030 days ago · 10 km deep · 81 km away

The first 60 of 102.

Before

  1. 2.27km SSW of Littlerock, CA · 14058 days ago · 7 km deep · 66 km away
  2. 1.91km N of View Park-Windsor Hills, CA · 14060 days ago · 4 km deep · 10 km away
  3. 1.54km WSW of Santa Clarita, CA · 14062 days ago · 14 km deep · 58 km away
  4. 1.64km WSW of Santa Clarita, CA · 14062 days ago · 16 km deep · 59 km away
  5. 2.24km WSW of Santa Clarita, CA · 14062 days ago · 13 km deep · 58 km away
  6. 2.318km WSW of Manhattan Beach, CA · 14064 days ago · 10 km deep · 29 km away
  7. 2.11km ENE of Gardena, CA · 14065 days ago · 15 km deep · 4 km away
  8. 1.713km S of Home Gardens, CA · 14066 days ago · 5 km deep · 76 km away
  9. 2.62km W of South El Monte, CA · 14066 days ago · 11 km deep · 26 km away
  10. 3.85km SSW of Malibu Beach, CA · 14068 days ago · 13 km deep · 39 km away
  11. 2.229km S of Malibu, CA · 14068 days ago · 6 km deep · 47 km away
  12. 2.12km NE of Woodcrest, CA · 14069 days ago · 5 km deep · 88 km away
  13. 2.216km S of Malibu Beach, CA · 14070 days ago · 12 km deep · 37 km away
  14. 1.92km SSW of South El Monte, CA · 14072 days ago · 13 km deep · 26 km away
  15. 1.52km ENE of Citrus, CA · 14072 days ago · 14 km deep · 45 km away
  16. 1.54km NNW of Rancho Cucamonga, CA · 14072 days ago · 7 km deep · 70 km away
  17. 2.017km ENE of Santa Barbara Is., CA · 14074 days ago · 6 km deep · 70 km away
  18. 2.33km ESE of Colton, CA · 14075 days ago · 14 km deep · 95 km away
  19. 1.66km E of Ojai, CA · 14076 days ago · 9 km deep · 100 km away
  20. 2.013km S of Las Flores, CA · 14083 days ago · 6 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci747281. Read Thu, Oct 1, 2026, 2:55 AM UTC.