California earthquakes

M2.1 earthquake 0 km NNE of Ladera, California

A magnitude 2.1 earthquake struck 0 km NNE of Ladera, California on Mon, Dec 21, 1987, 4:20 PM PST (00:20 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.9 12 km ESE of East Foothills, California. This one was a foreshock.

Ladera 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-12-22 00:20:38 UTC
Depth
4.6 km (2.8 mi), shallow
Epicenter
37.403° N, 122.197° 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, 0.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
166°
Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 84 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 1.8Northern California · 14163 days ago · 7 km deep · 28 km away
  2. 1.513 km ENE of East Foothills, California · 14162 days ago · 6 km deep · 45 km away
  3. 2.12 km SSW of Portola Valley, California · 14160 days ago · 9 km deep · 6 km away
  4. 1.713 km ESE of East Foothills, California · 14160 days ago · 8 km deep · 46 km away
  5. 1.69 km NE of Morgan Hill, California · 14160 days ago · 5 km deep · 59 km away
  6. 1.917 km SSE of Livermore, California · 14158 days ago · 5 km deep · 49 km away
  7. 3.29 km S of Muir Beach, California · 14156 days ago · 10 km deep · 54 km away
  8. 3.611 km SW of Byron, California · 14155 days ago · 12 km deep · 61 km away
  9. 1.816 km NE of East Foothills, California · 14154 days ago · 2 km deep · 47 km away
  10. 1.99 km S of San Juan Bautista, California · 14154 days ago · 8 km deep · 92 km away
  11. 1.514 km SSE of Livermore, California · 14153 days ago · 7 km deep · 49 km away
  12. 3.58 km ENE of San Martin, California · 14153 days ago · 8 km deep · 68 km away
  13. 1.68 km ENE of San Martin, California · 14153 days ago · 7 km deep · 67 km away
  14. 1.86 km SW of Gilroy, California · 14152 days ago · 7 km deep · 70 km away
  15. 1.71 km NW of Danville, California · 14151 days ago · 7 km deep · 50 km away
  16. 1.92 km WNW of Dublin, California · 14151 days ago · 9 km deep · 40 km away
  17. 2.214 km SSE of Livermore, California · 14150 days ago · 7 km deep · 50 km away
  18. 1.6Central California · 14149 days ago · 6 km deep · 73 km away
  19. 1.56 km E of East Foothills, California · 14148 days ago · 3 km deep · 40 km away
  20. 1.6Northern California · 14148 days ago · 6 km deep · 46 km away
  21. 1.711 km ESE of East Foothills, California · 14147 days ago · 7 km deep · 44 km away
  22. 1.86 km ENE of Hollister, California · 14144 days ago · 7 km deep · 96 km away
  23. 2.818 km SSE of Livermore, California · 14144 days ago · 6 km deep · 48 km away
  24. 2.31 km E of Walnut Creek, California · 14144 days ago · 6 km deep · 57 km away
  25. 2.418 km SSE of Livermore, California · 14143 days ago · 6 km deep · 47 km away
  26. 1.71 km E of Ladera, California · 14143 days ago · 4 km deep · 1 km away
  27. 1.50 km ENE of Benicia, California · 14141 days ago · 8 km deep · 72 km away
  28. 2.13 km WSW of Antioch, California · 14140 days ago · 1 km deep · 73 km away
  29. 3.03 km SW of Ridgemark, CA · 14140 days ago · 3 km deep · 99 km away
  30. 2.42 km SW of Ridgemark, California · 14140 days ago · 3 km deep · 99 km away
  31. 3.0Central California · 14140 days ago · 3 km deep · 99 km away
  32. 2.818 km SSE of Livermore, California · 14138 days ago · 7 km deep · 48 km away
  33. 1.93 km N of San Leandro, California · 14137 days ago · 3 km deep · 39 km away
  34. 1.57 km NNE of Milpitas, California · 14136 days ago · 3 km deep · 31 km away
  35. 1.719 km NE of East Foothills, California · 14135 days ago · 6 km deep · 47 km away
  36. 2.66 km ENE of Hollister, California · 14135 days ago · 8 km deep · 96 km away
  37. 2.819 km SSE of Livermore, California · 14133 days ago · 3 km deep · 48 km away
  38. 1.7Northern California · 14131 days ago · 13 km deep · 64 km away
  39. 1.94 km SW of Napa, California · 14131 days ago · 4 km deep · 97 km away
  40. 1.811 km E of Blackhawk, California · 14131 days ago · 5 km deep · 59 km away
  41. 1.712 km ESE of East Foothills, California · 14130 days ago · 7 km deep · 45 km away
  42. 2.49 km SW of Brentwood, California · 14129 days ago · 16 km deep · 64 km away
  43. 1.719 km SSE of Livermore, California · 14129 days ago · 7 km deep · 48 km away
  44. 1.75 km SSE of San Juan Bautista, California · 14129 days ago · 6 km deep · 90 km away
  45. 3.22 km S of San Juan Bautista, California · 14128 days ago · 5 km deep · 88 km away
  46. 2.53 km S of San Juan Bautista, California · 14128 days ago · 4 km deep · 88 km away
  47. 1.83 km S of San Juan Bautista, CA · 14128 days ago · 4 km deep · 88 km away
  48. 2.22 km S of San Juan Bautista, California · 14128 days ago · 5 km deep · 88 km away
  49. 2.21 km WNW of Concord, California · 14127 days ago · 15 km deep · 66 km away
  50. 1.52 km NE of San Leandro, California · 14127 days ago · 4 km deep · 38 km away
  51. 2.5Northern California · 14127 days ago · 1 km deep · 33 km away
  52. 1.93 km NNW of Blackhawk, California · 14127 days ago · 17 km deep · 55 km away
  53. 1.72 km NNW of Blackhawk, California · 14127 days ago · 16 km deep · 55 km away
  54. 1.53 km SSE of San Juan Bautista, California · 14125 days ago · 4 km deep · 88 km away
  55. 1.96 km NE of East Foothills, California · 14123 days ago · 7 km deep · 38 km away
  56. 2.35 km S of Gilroy, California · 14123 days ago · 4 km deep · 74 km away
  57. 2.312 km N of Morgan Hill, California · 14123 days ago · 3 km deep · 53 km away
  58. 1.99 km E of Gilroy, California · 14123 days ago · 7 km deep · 79 km away
  59. 1.78 km ENE of Gilroy, California · 14123 days ago · 9 km deep · 77 km away
  60. 1.812 km E of Blackhawk, California · 14122 days ago · 10 km deep · 59 km away

The first 60 of 84.

Before

  1. 1.5Central California · 14165 days ago · 5 km deep · 98 km away
  2. 1.72 km ESE of East Richmond Heights, California · 14167 days ago · 8 km deep · 60 km away
  3. 2.6Northern California · 14167 days ago · 5 km deep · 49 km away
  4. 2.411 km SSE of Livermore, California · 14167 days ago · 5 km deep · 49 km away
  5. 1.66 km NE of Ridgemark, California · 14168 days ago · 5 km deep · 100 km away
  6. 1.96 km NW of Broadmoor, California · 14168 days ago · 21 km deep · 46 km away
  7. 1.812 km N of Morgan Hill, California · 14168 days ago · 6 km deep · 53 km away
  8. 1.718 km SSE of Livermore, California · 14172 days ago · 6 km deep · 48 km away
  9. 1.74 km WSW of Cupertino, California · 14172 days ago · 8 km deep · 15 km away
  10. 1.815 km SSE of Livermore, California · 14173 days ago · 6 km deep · 49 km away
  11. 1.98 km ESE of East Foothills, California · 14173 days ago · 8 km deep · 42 km away
  12. 1.513 km N of Morgan Hill, California · 14173 days ago · 5 km deep · 52 km away
  13. 1.61 km NW of Brisbane, California · 14176 days ago · 5 km deep · 37 km away
  14. 2.812 km N of Morgan Hill, CA · 14177 days ago · 5 km deep · 53 km away
  15. 1.68 km WNW of American Canyon, California · 14177 days ago · 13 km deep · 89 km away
  16. 1.914 km N of Morgan Hill, California · 14179 days ago · 6 km deep · 52 km away
  17. 1.9Central California · 14179 days ago · 6 km deep · 87 km away
  18. 2.213 km N of Morgan Hill, California · 14179 days ago · 3 km deep · 52 km away
  19. 1.613 km NE of East Foothills, California · 14179 days ago · 8 km deep · 42 km away
  20. 1.915 km N of Morgan Hill, California · 14182 days ago · 6 km deep · 51 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc110144. Read Thu, Oct 1, 2026, 4:11 PM UTC.