California earthquakes

M3.4 earthquake 15 km SSE of Livermore, California

A magnitude 3.4 earthquake struck 15 km SSE of Livermore, California on Thu, Apr 9, 1987, 9:51 PM PDT (04:51 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M4.1 5 km NNE of Tres Pinos, California. 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
3.4 (ml), minor
Local time
UTC
1987-04-10 04:51:46 UTC
Depth
3.9 km (2.4 mi), shallow
Epicenter
37.564° N, 121.678° 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 0.1 km horizontally, 0.3 km in depth
Depth from
From location
Station coverage gap
42°
Stations used
76

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 122 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 2.610 km ESE of East Foothills, California · 14411 days ago · 7 km deep · 24 km away
  2. 2.113 km ENE of East Foothills, California · 14411 days ago · 7 km deep · 14 km away
  3. 1.713 km ENE of East Foothills, California · 14410 days ago · 7 km deep · 15 km away
  4. 1.66 km NNE of Tres Pinos, California · 14408 days ago · 4 km deep · 87 km away
  5. 2.417 km SSE of Livermore, California · 14408 days ago · 2 km deep · 2 km away
  6. 2.03 km ESE of Seven Trees, California · 14408 days ago · 7 km deep · 34 km away
  7. 3.02 km W of Hollister, California · 14408 days ago · 5 km deep · 82 km away
  8. 3.314 km N of Morgan Hill, California · 14407 days ago · 4 km deep · 34 km away
  9. 1.52 km WSW of Cambrian Park, California · 14405 days ago · 6 km deep · 43 km away
  10. 1.610 km ESE of Seven Trees, California · 14404 days ago · 2 km deep · 36 km away
  11. 1.85 km ENE of Hollister, California · 14403 days ago · 7 km deep · 82 km away
  12. 2.36 km NNE of East Foothills, California · 14402 days ago · 5 km deep · 18 km away
  13. 1.81 km ENE of Walnut Creek, California · 14402 days ago · 5 km deep · 51 km away
  14. 2.01 km W of Tres Pinos, California · 14401 days ago · 4 km deep · 91 km away
  15. 2.78 km NE of San Martin, California · 14401 days ago · 7 km deep · 50 km away
  16. 1.75 km ENE of Hollister, California · 14400 days ago · 7 km deep · 82 km away
  17. 2.71 km ENE of San Ramon, California · 14400 days ago · 8 km deep · 35 km away
  18. 2.11 km NE of San Ramon, California · 14400 days ago · 7 km deep · 35 km away
  19. 1.71 km ENE of San Ramon, California · 14400 days ago · 8 km deep · 35 km away
  20. 3.27 km NNE of East Foothills, California · 14399 days ago · 7 km deep · 17 km away
  21. 1.87 km NNE of East Foothills, California · 14399 days ago · 7 km deep · 17 km away
  22. 1.90 km NW of Walnut Creek, California · 14399 days ago · 6 km deep · 51 km away
  23. 2.27 km NNE of East Foothills, California · 14399 days ago · 7 km deep · 17 km away
  24. 1.57 km ESE of East Foothills, California · 14398 days ago · 1 km deep · 23 km away
  25. 2.51 km ENE of San Ramon, California · 14397 days ago · 8 km deep · 35 km away
  26. 1.81 km ENE of San Ramon, California · 14397 days ago · 7 km deep · 35 km away
  27. 3.113 km ESE of Alum Rock, California · 14397 days ago · 7 km deep · 28 km away
  28. 1.77 km E of East Foothills, California · 14395 days ago · 8 km deep · 22 km away
  29. 2.82 km SW of Ridgemark, California · 14395 days ago · 13 km deep · 89 km away
  30. 2.3Central California · 14394 days ago · 4 km deep · 84 km away
  31. 2.00 km E of Walnut Creek, California · 14394 days ago · 3 km deep · 50 km away
  32. 2.21 km E of Walnut Creek, California · 14393 days ago · 5 km deep · 50 km away
  33. 1.81 km SE of Waldon, California · 14393 days ago · 5 km deep · 51 km away
  34. 1.80 km E of Walnut Creek, California · 14393 days ago · 4 km deep · 51 km away
  35. 2.61 km E of Walnut Creek, California · 14393 days ago · 5 km deep · 50 km away
  36. 2.216 km SSE of Livermore, California · 14392 days ago · 8 km deep · 1 km away
  37. 2.314 km E of Seven Trees, California · 14392 days ago · 3 km deep · 30 km away
  38. 1.90 km NNE of Acalanes Ridge, California · 14392 days ago · 7 km deep · 52 km away
  39. 1.616 km SSE of Livermore, California · 14391 days ago · 3 km deep · 1 km away
  40. 2.85 km NNE of Tres Pinos, California · 14391 days ago · 8 km deep · 88 km away
  41. 1.94 km S of San Juan Bautista, California · 14391 days ago · 7 km deep · 85 km away
  42. 1.8Central California · 14391 days ago · 7 km deep · 88 km away
  43. 4.15 km NNE of Tres Pinos, California · 14390 days ago · 8 km deep · 88 km away
  44. 1.94 km NE of Tres Pinos, California · 14390 days ago · 7 km deep · 89 km away
  45. 3.15 km NNE of Tres Pinos, California · 14390 days ago · 8 km deep · 88 km away
  46. 1.714 km E of Seven Trees, California · 14390 days ago · 3 km deep · 30 km away
  47. 2.05 km SE of Pleasanton, California · 14389 days ago · 6 km deep · 15 km away
  48. 1.75 km SE of Pleasanton, California · 14389 days ago · 6 km deep · 15 km away
  49. 1.53 km SSW of Alamo, California · 14389 days ago · 12 km deep · 44 km away
  50. 1.714 km E of Seven Trees, California · 14389 days ago · 2 km deep · 30 km away
  51. 1.94 km NE of Tres Pinos, California · 14388 days ago · 8 km deep · 89 km away
  52. 2.05 km NNE of Tres Pinos, California · 14388 days ago · 8 km deep · 88 km away
  53. 1.815 km SSE of Livermore, California · 14388 days ago · 4 km deep · 1 km away
  54. 1.65 km SW of Gilroy, California · 14388 days ago · 3 km deep · 67 km away
  55. 2.30 km E of Walnut Creek, California · 14387 days ago · 5 km deep · 50 km away
  56. 2.34 km SSE of San Juan Bautista, California · 14387 days ago · 7 km deep · 86 km away
  57. 1.613 km N of Morgan Hill, California · 14384 days ago · 3 km deep · 35 km away
  58. 1.7Northern California · 14383 days ago · 7 km deep · 51 km away
  59. 2.29 km SE of San Juan Bautista, California · 14383 days ago · 7 km deep · 90 km away
  60. 1.90 km W of Walnut Creek, California · 14383 days ago · 5 km deep · 51 km away

The first 60 of 122.

Before

  1. 2.310 km ESE of East Foothills, California · 14411 days ago · 8 km deep · 25 km away
  2. 1.519 km NE of East Foothills, California · 14411 days ago · 7 km deep · 6 km away
  3. 1.73 km NW of Sunol, California · 14412 days ago · 3 km deep · 21 km away
  4. 2.07 km E of East Foothills, California · 14413 days ago · 6 km deep · 22 km away
  5. 2.09 km SSW of Tres Pinos, California · 14413 days ago · 3 km deep · 99 km away
  6. 1.512 km NE of East Foothills, California · 14413 days ago · 6 km deep · 12 km away
  7. 1.612 km ENE of East Foothills, California · 14415 days ago · 8 km deep · 15 km away
  8. 2.014 km N of Morgan Hill, California · 14415 days ago · 5 km deep · 34 km away
  9. 2.81 km NNW of Castro Valley, California · 14417 days ago · 5 km deep · 40 km away
  10. 2.07 km SW of Mountain House, California · 14417 days ago · 15 km deep · 20 km away
  11. 1.66 km ENE of Hollister, California · 14417 days ago · 9 km deep · 82 km away
  12. 1.912 km ESE of East Foothills, California · 14418 days ago · 1 km deep · 24 km away
  13. 1.86 km S of Tres Pinos, California · 14418 days ago · 8 km deep · 98 km away
  14. 1.718 km NE of East Foothills, California · 14418 days ago · 5 km deep · 6 km away
  15. 1.85 km NNE of Tres Pinos, California · 14418 days ago · 7 km deep · 88 km away
  16. 1.618 km NE of East Foothills, California · 14419 days ago · 6 km deep · 6 km away
  17. 1.920 km NE of East Foothills, California · 14419 days ago · 0 km deep · 6 km away
  18. 2.120 km NE of East Foothills, California · 14419 days ago · 1 km deep · 6 km away
  19. 1.712 km NE of East Foothills, California · 14420 days ago · 8 km deep · 12 km away
  20. 1.820 km NE of East Foothills, California · 14420 days ago · 0 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc98314 (also filed as usp000341z). Read Tue, Sep 22, 2026, 10:33 PM UTC.