California earthquakes

M1.8 earthquake 16 km E of Seven Trees, California

A magnitude 1.8 earthquake struck 16 km E of Seven Trees, California on Fri, May 22, 1987, 5:35 PM PDT (00:35 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.6 22 km NE of Soledad, 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
1.8 (md), micro
Local time
UTC
1987-05-23 00:35:15 UTC
Depth
6.2 km (3.9 mi), shallow
Epicenter
37.280° N, 121.658° 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, 0.2 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
29°
Stations used
50

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 139 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.622 km NE of Soledad, California · 14367 days ago · 4 km deep · 88 km away
  2. 1.61 km NE of Pacific Grove, California · 14366 days ago · 4 km deep · 76 km away
  3. 1.93 km SSW of Broadmoor, California · 14365 days ago · 8 km deep · 84 km away
  4. 1.514 km E of Seven Trees, California · 14365 days ago · 2 km deep · 2 km away
  5. 1.50 km NE of Pleasant Hill, California · 14365 days ago · 9 km deep · 83 km away
  6. 1.57 km ENE of Interlaken, California · 14365 days ago · 8 km deep · 33 km away
  7. 1.521 km NE of Soledad, California · 14365 days ago · 6 km deep · 90 km away
  8. 1.61 km NE of Pleasant Hill, California · 14365 days ago · 8 km deep · 83 km away
  9. 3.43 km N of San Leandro, California · 14365 days ago · 5 km deep · 68 km away
  10. 3.0Northern California · 14365 days ago · 5 km deep · 68 km away
  11. 2.43 km NNE of San Leandro, California · 14365 days ago · 5 km deep · 68 km away
  12. 2.23 km N of San Leandro, California · 14365 days ago · 4 km deep · 68 km away
  13. 2.53 km NNE of San Leandro, California · 14364 days ago · 5 km deep · 68 km away
  14. 2.05 km SE of Tres Pinos, California · 14364 days ago · 7 km deep · 67 km away
  15. 1.94 km ESE of San Ramon, California · 14364 days ago · 3 km deep · 59 km away
  16. 2.34 km ESE of San Ramon, California · 14364 days ago · 7 km deep · 59 km away
  17. 1.68 km ESE of East Foothills, California · 14364 days ago · 2 km deep · 10 km away
  18. 2.04 km ESE of San Ramon, California · 14364 days ago · 7 km deep · 59 km away
  19. 1.623 km ENE of Soledad, California · 14363 days ago · 5 km deep · 99 km away
  20. 1.612 km ESE of East Foothills, California · 14363 days ago · 5 km deep · 6 km away
  21. 1.81 km WNW of Concord, California · 14362 days ago · 12 km deep · 85 km away
  22. 2.62 km NNE of San Leandro, California · 14362 days ago · 4 km deep · 67 km away
  23. 1.814 km N of Morgan Hill, California · 14362 days ago · 5 km deep · 3 km away
  24. 1.619 km E of East Foothills, California · 14361 days ago · 5 km deep · 9 km away
  25. 1.75 km WSW of Gilroy, California · 14361 days ago · 7 km deep · 33 km away
  26. 2.63 km ENE of East Foothills, California · 14361 days ago · 1 km deep · 17 km away
  27. 2.118 km SSW of Volta, California · 14360 days ago · 7 km deep · 70 km away
  28. 3.22 km NE of San Leandro, California · 14360 days ago · 4 km deep · 67 km away
  29. 2.82 km NNE of San Leandro, California · 14360 days ago · 4 km deep · 67 km away
  30. 1.96 km SW of Ridgemark, California · 14359 days ago · 10 km deep · 62 km away
  31. 1.616 km SSE of Livermore, California · 14359 days ago · 8 km deep · 31 km away
  32. 2.63 km NNE of San Leandro, California · 14357 days ago · 4 km deep · 68 km away
  33. 2.014 km E of Seven Trees, California · 14357 days ago · 4 km deep · 1 km away
  34. 1.814 km E of Seven Trees, California · 14357 days ago · 3 km deep · 1 km away
  35. 1.621 km NE of Soledad, California · 14356 days ago · 2 km deep · 89 km away
  36. 1.60 km NE of North Gate, California · 14356 days ago · 11 km deep · 76 km away
  37. 1.718 km NE of East Foothills, California · 14356 days ago · 7 km deep · 26 km away
  38. 1.514 km N of Morgan Hill, California · 14355 days ago · 6 km deep · 2 km away
  39. 2.713 km N of Morgan Hill, California · 14355 days ago · 6 km deep · 3 km away
  40. 2.921 km NE of Soledad, California · 14353 days ago · 2 km deep · 91 km away
  41. 1.520 km SE of Tres Pinos, California · 14353 days ago · 9 km deep · 81 km away
  42. 1.630 km ENE of Soledad, California · 14353 days ago · 7 km deep · 97 km away
  43. 2.621 km NE of Soledad, California · 14352 days ago · 2 km deep · 89 km away
  44. 2.22 km N of Ashland, California · 14352 days ago · 5 km deep · 63 km away
  45. 1.521 km NE of Soledad, California · 14351 days ago · 3 km deep · 91 km away
  46. 2.515 km E of Seven Trees, California · 14351 days ago · 6 km deep · 1 km away
  47. 1.98 km ENE of Morgan Hill, California · 14351 days ago · 2 km deep · 16 km away
  48. 2.814 km N of Morgan Hill, California · 14351 days ago · 6 km deep · 3 km away
  49. 1.6Northern California · 14350 days ago · 5 km deep · 54 km away
  50. 1.93 km S of Fairview, California · 14350 days ago · 4 km deep · 53 km away
  51. 2.35 km NNE of Tres Pinos, California · 14348 days ago · 6 km deep · 60 km away
  52. 2.64 km W of San Juan Bautista, California · 14348 days ago · 6 km deep · 48 km away
  53. 2.04 km WNW of San Juan Bautista, California · 14348 days ago · 6 km deep · 48 km away
  54. 1.529 km NE of Soledad, California · 14348 days ago · 4 km deep · 95 km away
  55. 3.12 km NNW of Communications Hill, California · 14348 days ago · 10 km deep · 19 km away
  56. 2.116 km SSE of Tres Pinos, California · 14347 days ago · 5 km deep · 78 km away
  57. 1.610 km E of Blackhawk, California · 14347 days ago · 18 km deep · 63 km away
  58. 1.811 km S of Tres Pinos, California · 14347 days ago · 4 km deep · 73 km away
  59. 1.88 km NE of Interlaken, California · 14346 days ago · 4 km deep · 30 km away
  60. 1.922 km NNE of Soledad, California · 14345 days ago · 2 km deep · 87 km away

The first 60 of 139.

Before

  1. 2.018 km NE of East Foothills, California · 14369 days ago · 4 km deep · 26 km away
  2. 1.618 km NE of East Foothills, California · 14369 days ago · 4 km deep · 26 km away
  3. 1.73 km SW of Hillsborough, California · 14370 days ago · 9 km deep · 73 km away
  4. 1.518 km SSE of Tres Pinos, California · 14370 days ago · 10 km deep · 81 km away
  5. 1.814 km N of Morgan Hill, California · 14370 days ago · 6 km deep · 2 km away
  6. 1.64 km E of Union City, California · 14371 days ago · 7 km deep · 45 km away
  7. 1.718 km SSE of Tres Pinos, California · 14371 days ago · 10 km deep · 81 km away
  8. 2.114 km N of Morgan Hill, California · 14372 days ago · 3 km deep · 2 km away
  9. 2.315 km SSE of Livermore, California · 14373 days ago · 4 km deep · 31 km away
  10. 2.08 km WNW of Davenport, California · 14374 days ago · 12 km deep · 60 km away
  11. 1.817 km SSE of Tres Pinos, California · 14375 days ago · 4 km deep · 79 km away
  12. 2.20 km S of Clayton, California · 14375 days ago · 3 km deep · 77 km away
  13. 2.613 km ENE of East Foothills, California · 14375 days ago · 7 km deep · 19 km away
  14. 1.812 km NE of East Foothills, California · 14376 days ago · 5 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc100830. Read Tue, Sep 22, 2026, 9:39 PM UTC.