California earthquakes

M1.7 earthquake 1km NNW of Placentia, CA

A magnitude 1.7 earthquake struck 1km NNW of Placentia, CA on Fri, Mar 6, 1987, 8:47 PM PST (04:47 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.6 41km WSW of Carlsbad, CA. This one was a foreshock.

Placentia 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
1.7 (Mc), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1987-03-07 04:47:15 UTC
Depth
6.2 km (3.9 mi), shallow
Epicenter
33.878° N, 117.872° 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
193°, poorly surrounded by stations
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: 170 in the 60 days after this one and 107 in the 30 days before it.

After

  1. 2.113km WNW of Aguanga, CA · 14455 days ago · 5 km deep · 92 km away
  2. 1.811km WNW of Aguanga, CA · 14455 days ago · 5 km deep · 94 km away
  3. 1.81km E of Yucaipa, CA · 14455 days ago · 13 km deep · 80 km away
  4. 2.03km SSW of Lomita, CA · 14454 days ago · 7 km deep · 44 km away
  5. 2.06km ESE of Valle Vista, CA · 14454 days ago · 14 km deep · 97 km away
  6. 2.013km NE of Yucaipa, CA · 14454 days ago · 5 km deep · 91 km away
  7. 1.74km NNE of Fontana, CA · 14454 days ago · 8 km deep · 49 km away
  8. 2.845km WSW of Carlsbad, CA · 14453 days ago · 6 km deep · 99 km away
  9. 2.17km NNE of Banning, CA · 14453 days ago · 16 km deep · 95 km away
  10. 2.911km N of Running Springs, CA · 14453 days ago · 4 km deep · 86 km away
  11. 3.342km WSW of Carlsbad, CA · 14452 days ago · 6 km deep · 99 km away
  12. 2.516km S of Malibu Beach, CA · 14451 days ago · 6 km deep · 73 km away
  13. 1.73km NNE of Fontana, CA · 14451 days ago · 8 km deep · 48 km away
  14. 2.42km S of Loma Linda, CA · 14450 days ago · 18 km deep · 59 km away
  15. 2.444km WSW of Carlsbad, CA · 14447 days ago · 6 km deep · 94 km away
  16. 2.25km S of Loma Linda, CA · 14447 days ago · 13 km deep · 57 km away
  17. 2.03km SSW of Loma Linda, CA · 14447 days ago · 16 km deep · 57 km away
  18. 1.92km SSE of South Whittier, CA · 14445 days ago · 13 km deep · 16 km away
  19. 2.13km WNW of La Mirada, CA · 14445 days ago · 5 km deep · 16 km away
  20. 2.644km WSW of Carlsbad, CA · 14445 days ago · 6 km deep · 99 km away
  21. 2.34km SE of Huntington Beach, CA · 14445 days ago · 6 km deep · 25 km away
  22. 2.411km SSW of Big Bear Lake, CA · 14444 days ago · 13 km deep · 89 km away
  23. 2.15km WNW of Lytle Creek, CA · 14444 days ago · 4 km deep · 53 km away
  24. 3.341km WSW of Carlsbad, CA · 14444 days ago · 6 km deep · 99 km away
  25. 2.843km WSW of Carlsbad, CA · 14444 days ago · 6 km deep · 99 km away
  26. 2.648km WSW of Carlsbad, CA · 14443 days ago · 6 km deep · 96 km away
  27. 2.839km WSW of Carlsbad, CA · 14443 days ago · 5 km deep · 98 km away
  28. 2.944km WSW of Carlsbad, CA · 14443 days ago · 5 km deep · 98 km away
  29. 2.06km SSE of Banning, CA · 14442 days ago · 15 km deep · 95 km away
  30. 1.54km N of Fontana, CA · 14442 days ago · 9 km deep · 48 km away
  31. 2.440km WSW of Carlsbad, CA · 14442 days ago · 6 km deep · 91 km away
  32. 1.83km E of View Park-Windsor Hills, CA · 14442 days ago · 4 km deep · 43 km away
  33. 2.748km WSW of Carlsbad, CA · 14442 days ago · 6 km deep · 95 km away
  34. 1.87km ENE of Santa Clarita, CA · 14442 days ago · 9 km deep · 80 km away
  35. 2.54km S of San Dimas, CA · 14441 days ago · 15 km deep · 22 km away
  36. 2.04km S of San Dimas, CA · 14441 days ago · 15 km deep · 22 km away
  37. 2.740km WSW of Carlsbad, CA · 14441 days ago · 6 km deep · 100 km away
  38. 1.95km S of Banning, CA · 14440 days ago · 12 km deep · 92 km away
  39. 2.736km WSW of Carlsbad, CA · 14440 days ago · 6 km deep · 99 km away
  40. 2.29km NE of Lake Arrowhead, CA · 14439 days ago · 1 km deep · 84 km away
  41. 2.27km NNE of Yucaipa, CA · 14438 days ago · 8 km deep · 83 km away
  42. 2.936km WSW of Carlsbad, CA · 14438 days ago · 6 km deep · 99 km away
  43. 1.74km NNE of Fontana, CA · 14438 days ago · 9 km deep · 49 km away
  44. 2.442km WSW of Carlsbad, CA · 14438 days ago · 6 km deep · 97 km away
  45. 2.84km NNE of Fontana, CA · 14438 days ago · 8 km deep · 49 km away
  46. 2.04km ENE of Calimesa, CA · 14437 days ago · 12 km deep · 81 km away
  47. 2.22km NE of Ladera Ranch, CA · 14436 days ago · 5 km deep · 41 km away
  48. 2.417km S of Malibu Beach, CA · 14436 days ago · 4 km deep · 77 km away
  49. 2.34km NNW of Villa Park, CA · 14436 days ago · 5 km deep · 6 km away
  50. 2.216km S of Malibu Beach, CA · 14436 days ago · 4 km deep · 77 km away
  51. 2.742km WSW of Carlsbad, CA · 14436 days ago · 5 km deep · 99 km away
  52. 2.845km WSW of Carlsbad, CA · 14435 days ago · 5 km deep · 94 km away
  53. 2.738km WSW of Carlsbad, CA · 14435 days ago · 5 km deep · 92 km away
  54. 1.93km SSE of Yorba Linda, CA · 14435 days ago · 3 km deep · 7 km away
  55. 1.62km S of Loma Linda, CA · 14434 days ago · 11 km deep · 59 km away
  56. 3.23km SE of View Park-Windsor Hills, CA · 14434 days ago · 6 km deep · 43 km away
  57. 2.33km E of Banning, CA · 14434 days ago · 5 km deep · 95 km away
  58. 2.442km WSW of Carlsbad, CA · 14434 days ago · 5 km deep · 95 km away
  59. 1.92km S of Loma Linda, CA · 14434 days ago · 11 km deep · 59 km away
  60. 2.02km S of Loma Linda, CA · 14434 days ago · 11 km deep · 59 km away

The first 60 of 170.

Before

  1. 1.75km NNE of San Bernardino, CA · 14456 days ago · 2 km deep · 65 km away
  2. 2.45km W of Mira Loma, CA · 14457 days ago · 8 km deep · 31 km away
  3. 2.646km WSW of Carlsbad, CA · 14457 days ago · 5 km deep · 93 km away
  4. 2.745km WSW of Carlsbad, CA · 14458 days ago · 6 km deep · 99 km away
  5. 1.74km ENE of Norco, CA · 14459 days ago · 2 km deep · 35 km away
  6. 1.913km WNW of Aguanga, CA · 14459 days ago · 5 km deep · 92 km away
  7. 2.010km ENE of Villa Park, CA · 14459 days ago · 3 km deep · 16 km away
  8. 1.812km WNW of Aguanga, CA · 14459 days ago · 5 km deep · 93 km away
  9. 2.118km NNE of Avalon, CA · 14460 days ago · 6 km deep · 56 km away
  10. 2.62km NNW of Fontana, CA · 14460 days ago · 9 km deep · 45 km away
  11. 2.647km WSW of Carlsbad, CA · 14461 days ago · 6 km deep · 99 km away
  12. 1.84km ENE of Norco, CA · 14461 days ago · 1 km deep · 34 km away
  13. 2.03km WSW of Mira Loma, CA · 14461 days ago · 4 km deep · 32 km away
  14. 2.68km S of Redlands, CA · 14461 days ago · 15 km deep · 65 km away
  15. 1.84km NW of Yorba Linda, CA · 14462 days ago · 3 km deep · 5 km away
  16. 2.738km WSW of Carlsbad, CA · 14462 days ago · 6 km deep · 98 km away
  17. 2.64km N of Fontana, CA · 14462 days ago · 6 km deep · 48 km away
  18. 2.444km WSW of Carlsbad, CA · 14462 days ago · 6 km deep · 97 km away
  19. 2.56km N of Beaumont, CA · 14462 days ago · 17 km deep · 83 km away
  20. 1.94km NNE of Fontana, CA · 14463 days ago · 9 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci718445. Read Sun, Oct 4, 2026, 6:35 AM UTC.