California earthquakes

M1.6 earthquake 16 km E of Seven Trees, California

A magnitude 1.6 earthquake struck 16 km E of Seven Trees, California on Tue, Aug 4, 1987, 2:54 AM PDT (09:54 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.8 18 km SW of Gustine, California. This one was a foreshock.

Seven Trees 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-08-04 09:54:15 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
37.278° N, 121.656° 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
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
64°
Stations used
47

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 114 in the 60 days after this one and 63 in the 30 days before it.

After

  1. 1.921 km NE of Soledad, California · 14303 days ago · 6 km deep · 92 km away
  2. 1.77 km SE of Lexington Hills, California · 14303 days ago · 14 km deep · 29 km away
  3. 2.68 km NE of San Martin, California · 14302 days ago · 8 km deep · 20 km away
  4. 1.75 km NNE of Tres Pinos, California · 14302 days ago · 4 km deep · 59 km away
  5. 2.24 km SSE of Portola Valley, California · 14300 days ago · 10 km deep · 50 km away
  6. 1.84 km SSE of Portola Valley, California · 14300 days ago · 10 km deep · 50 km away
  7. 1.53 km ENE of San Leandro, California · 14299 days ago · 6 km deep · 65 km away
  8. 1.918 km SSE of Livermore, California · 14298 days ago · 7 km deep · 28 km away
  9. 1.63 km ESE of Piedmont, California · 14298 days ago · 3 km deep · 76 km away
  10. 1.63 km SW of Broadmoor, California · 14298 days ago · 8 km deep · 87 km away
  11. 1.711 km SW of Brentwood, California · 14298 days ago · 20 km deep · 64 km away
  12. 1.610 km SW of Ridgemark, California · 14298 days ago · 7 km deep · 62 km away
  13. 2.01 km N of Pittsburg, California · 14297 days ago · 20 km deep · 87 km away
  14. 1.93 km S of San Juan Bautista, California · 14297 days ago · 6 km deep · 52 km away
  15. 1.717 km NE of East Foothills, California · 14296 days ago · 6 km deep · 25 km away
  16. 1.610 km NNW of Hollister, California · 14296 days ago · 4 km deep · 42 km away
  17. 2.11 km SSE of Tres Pinos, California · 14296 days ago · 8 km deep · 63 km away
  18. 1.519 km SSE of Livermore, California · 14295 days ago · 5 km deep · 27 km away
  19. 2.60 km WNW of Sand City, California · 14294 days ago · 2 km deep · 75 km away
  20. 1.821 km NE of Soledad, California · 14294 days ago · 6 km deep · 93 km away
  21. 2.612 km ESE of East Foothills, California · 14293 days ago · 7 km deep · 6 km away
  22. 2.68 km NE of Interlaken, California · 14293 days ago · 7 km deep · 31 km away
  23. 1.95 km SE of Tres Pinos, California · 14292 days ago · 8 km deep · 67 km away
  24. 2.221 km NE of Soledad, California · 14291 days ago · 5 km deep · 89 km away
  25. 2.021 km NE of Soledad, California · 14291 days ago · 5 km deep · 90 km away
  26. 2.923 km NE of Soledad, California · 14290 days ago · 5 km deep · 92 km away
  27. 2.410 km S of Muir Beach, California · 14289 days ago · 8 km deep · 97 km away
  28. 1.623 km NE of Soledad, California · 14289 days ago · 4 km deep · 92 km away
  29. 2.118 km NE of East Foothills, California · 14287 days ago · 6 km deep · 25 km away
  30. 2.021 km NE of Soledad, California · 14287 days ago · 2 km deep · 92 km away
  31. 3.13 km NE of San Leandro, California · 14286 days ago · 8 km deep · 66 km away
  32. 1.53 km WSW of Hollister, California · 14286 days ago · 9 km deep · 52 km away
  33. 1.915 km N of Morgan Hill, California · 14286 days ago · 4 km deep · 1 km away
  34. 1.917 km NE of East Foothills, California · 14285 days ago · 6 km deep · 25 km away
  35. 1.65 km ENE of Hollister, California · 14285 days ago · 5 km deep · 53 km away
  36. 1.64 km E of Sunol, California · 14284 days ago · 7 km deep · 38 km away
  37. 2.022 km NNE of Soledad, California · 14284 days ago · 8 km deep · 85 km away
  38. 2.817 km SSE of Livermore, California · 14284 days ago · 1 km deep · 30 km away
  39. 1.79 km SW of Brentwood, California · 14282 days ago · 18 km deep · 65 km away
  40. 3.818 km SW of Gustine, California · 14281 days ago · 0 km deep · 47 km away
  41. 1.62 km SW of Ridgemark, California · 14281 days ago · 8 km deep · 59 km away
  42. 1.912 km S of Tres Pinos, California · 14281 days ago · 3 km deep · 74 km away
  43. 1.518 km SW of Gustine, California · 14280 days ago · 0 km deep · 46 km away
  44. 1.92 km W of Taft Mosswood, California · 14280 days ago · 4 km deep · 77 km away
  45. 3.42 km ESE of East Richmond Heights, California · 14279 days ago · 8 km deep · 92 km away
  46. 2.72 km ESE of East Richmond Heights, California · 14279 days ago · 8 km deep · 92 km away
  47. 2.511 km N of Pittsburg, California · 14279 days ago · 12 km deep · 97 km away
  48. 2.510 km ENE of East Foothills, California · 14279 days ago · 8 km deep · 17 km away
  49. 2.04 km S of San Juan Bautista, California · 14278 days ago · 7 km deep · 53 km away
  50. 1.94 km S of San Juan Bautista, California · 14278 days ago · 7 km deep · 54 km away
  51. 1.512 km ENE of East Foothills, California · 14277 days ago · 8 km deep · 17 km away
  52. 1.513 km N of Morgan Hill, California · 14277 days ago · 5 km deep · 4 km away
  53. 2.53 km E of Berkeley, California · 14277 days ago · 10 km deep · 83 km away
  54. 2.63 km E of Berkeley, California · 14277 days ago · 11 km deep · 83 km away
  55. 1.82 km E of Berkeley, California · 14277 days ago · 10 km deep · 83 km away
  56. 1.93 km E of Berkeley, California · 14277 days ago · 11 km deep · 83 km away
  57. 1.513 km ESE of Alum Rock, California · 14276 days ago · 2 km deep · 5 km away
  58. 2.117 km NE of East Foothills, California · 14276 days ago · 7 km deep · 25 km away
  59. 1.67 km NE of Hollister, California · 14275 days ago · 6 km deep · 50 km away
  60. 2.218 km SSE of Tres Pinos, California · 14274 days ago · 6 km deep · 80 km away

The first 60 of 114.

Before

  1. 1.79 km ENE of Blackhawk, California · 14305 days ago · 11 km deep · 64 km away
  2. 1.69 km E of Blackhawk, California · 14305 days ago · 10 km deep · 63 km away
  3. 1.79 km ENE of Blackhawk, California · 14305 days ago · 13 km deep · 64 km away
  4. 1.615 km ESE of East Foothills, California · 14306 days ago · 2 km deep · 6 km away
  5. 2.015 km E of Seven Trees, California · 14307 days ago · 6 km deep · 2 km away
  6. 1.5Northern California · 14307 days ago · 6 km deep · 0 km away
  7. 1.812 km S of Tres Pinos, California · 14307 days ago · 6 km deep · 74 km away
  8. 1.89 km SE of San Juan Bautista, California · 14308 days ago · 7 km deep · 59 km away
  9. 1.87 km NNE of East Foothills, California · 14309 days ago · 7 km deep · 23 km away
  10. 2.86 km E of East Foothills, California · 14309 days ago · 6 km deep · 14 km away
  11. 1.615 km E of Seven Trees, California · 14310 days ago · 6 km deep · 2 km away
  12. 1.518 km NE of East Foothills, California · 14311 days ago · 6 km deep · 26 km away
  13. 1.64 km ESE of Tres Pinos, California · 14313 days ago · 6 km deep · 66 km away
  14. 1.98 km ENE of Milpitas, California · 14313 days ago · 5 km deep · 26 km away
  15. 2.615 km SSE of Livermore, California · 14314 days ago · 2 km deep · 31 km away
  16. 2.518 km NE of East Foothills, California · 14314 days ago · 5 km deep · 26 km away
  17. 2.415 km SSE of Livermore, California · 14314 days ago · 2 km deep · 31 km away
  18. 1.59 km ESE of Seven Trees, California · 14315 days ago · 4 km deep · 9 km away
  19. 1.621 km NE of Soledad, California · 14315 days ago · 3 km deep · 91 km away
  20. 1.715 km SSE of Livermore, California · 14316 days ago · 3 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc104049. Read Thu, Oct 1, 2026, 4:26 PM UTC.