California earthquakes

M1.8 earthquake 15 km E of Seven Trees, California

A magnitude 1.8 earthquake struck 15 km E of Seven Trees, California on Thu, Jan 22, 1987, 10:14 AM PST (18:14 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.3 8 km SSW of Tres Pinos, 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
1987-01-22 18:14:59 UTC
Depth
5.8 km (3.6 mi), shallow
Epicenter
37.281° N, 121.659° 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 0.3 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
165°
Stations used
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 172 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.621 km NE of Soledad, California · 14476 days ago · 7 km deep · 92 km away
  2. 1.62 km WSW of San Juan Bautista, California · 14476 days ago · 4 km deep · 50 km away
  3. 1.65 km S of Gilroy, California · 14476 days ago · 7 km deep · 37 km away
  4. 1.816 km N of Morgan Hill, California · 14475 days ago · 6 km deep · 0 km away
  5. 2.38 km SSW of Tres Pinos, California · 14475 days ago · 3 km deep · 68 km away
  6. 1.58 km SSW of Tres Pinos, California · 14475 days ago · 3 km deep · 68 km away
  7. 1.78 km NW of Davenport, California · 14475 days ago · 9 km deep · 57 km away
  8. 1.621 km NE of Soledad, California · 14474 days ago · 4 km deep · 92 km away
  9. 1.512 km ESE of East Foothills, California · 14474 days ago · 3 km deep · 9 km away
  10. 1.619 km SSE of Livermore, California · 14472 days ago · 6 km deep · 27 km away
  11. 1.519 km SSE of Livermore, California · 14472 days ago · 6 km deep · 27 km away
  12. 2.610 km WSW of Ridgemark, California · 14471 days ago · 6 km deep · 60 km away
  13. 2.0Northern California · 14471 days ago · 7 km deep · 18 km away
  14. 1.515 km SSE of Livermore, California · 14471 days ago · 4 km deep · 31 km away
  15. 2.117 km NE of East Foothills, California · 14470 days ago · 7 km deep · 26 km away
  16. 2.317 km NE of East Foothills, California · 14470 days ago · 7 km deep · 25 km away
  17. 3.517 km NE of East Foothills, California · 14470 days ago · 8 km deep · 25 km away
  18. 2.218 km NE of East Foothills, California · 14470 days ago · 8 km deep · 26 km away
  19. 2.117 km NE of East Foothills, California · 14470 days ago · 7 km deep · 26 km away
  20. 1.818 km NE of East Foothills, California · 14470 days ago · 8 km deep · 26 km away
  21. 1.616 km SSE of Livermore, California · 14470 days ago · 1 km deep · 31 km away
  22. 2.118 km NE of East Foothills, California · 14470 days ago · 8 km deep · 26 km away
  23. 3.317 km NE of East Foothills, California · 14470 days ago · 7 km deep · 25 km away
  24. 2.26 km NE of Ridgemark, California · 14470 days ago · 5 km deep · 57 km away
  25. 2.322 km NNE of Soledad, California · 14469 days ago · 3 km deep · 86 km away
  26. 1.816 km SSE of Livermore, California · 14469 days ago · 1 km deep · 31 km away
  27. 1.921 km NE of Soledad, California · 14468 days ago · 6 km deep · 91 km away
  28. 1.724 km NE of Soledad, California · 14468 days ago · 8 km deep · 92 km away
  29. 1.718 km NE of East Foothills, California · 14468 days ago · 7 km deep · 26 km away
  30. 1.822 km NE of Soledad, California · 14468 days ago · 9 km deep · 94 km away
  31. 1.914 km E of Seven Trees, California · 14468 days ago · 6 km deep · 3 km away
  32. 2.31 km NE of Aromas, California · 14467 days ago · 5 km deep · 43 km away
  33. 1.717 km NE of East Foothills, California · 14467 days ago · 5 km deep · 25 km away
  34. 1.65 km S of San Ramon, California · 14466 days ago · 7 km deep · 58 km away
  35. 1.812 km S of Tres Pinos, California · 14466 days ago · 4 km deep · 74 km away
  36. 1.711 km ESE of Livermore, California · 14465 days ago · 6 km deep · 41 km away
  37. 2.513 km ESE of Alum Rock, California · 14465 days ago · 7 km deep · 5 km away
  38. 2.513 km ESE of Alum Rock, California · 14465 days ago · 7 km deep · 5 km away
  39. 2.48 km NE of Gilroy, California · 14465 days ago · 4 km deep · 29 km away
  40. 1.81 km ENE of San Leandro, California · 14465 days ago · 11 km deep · 66 km away
  41. 2.45 km NE of East Foothills, California · 14464 days ago · 7 km deep · 17 km away
  42. 1.86 km ENE of Hollister, California · 14464 days ago · 6 km deep · 53 km away
  43. 2.110 km ESE of Gilroy, California · 14464 days ago · 9 km deep · 38 km away
  44. 1.96 km NE of Interlaken, California · 14464 days ago · 9 km deep · 32 km away
  45. 1.810 km ESE of Gilroy, California · 14463 days ago · 9 km deep · 38 km away
  46. 1.920 km NNE of Soledad, California · 14463 days ago · 5 km deep · 85 km away
  47. 1.532 km SSW of Los Banos, California · 14463 days ago · 1 km deep · 85 km away
  48. 2.28 km SSE of Sunol, California · 14463 days ago · 7 km deep · 32 km away
  49. 1.817 km NE of East Foothills, California · 14463 days ago · 8 km deep · 25 km away
  50. 2.216 km SSE of Livermore, California · 14462 days ago · 3 km deep · 30 km away
  51. 1.516 km NE of East Foothills, California · 14462 days ago · 7 km deep · 23 km away
  52. 1.7Northern California · 14462 days ago · 7 km deep · 7 km away
  53. 1.92 km NE of San Leandro, California · 14461 days ago · 6 km deep · 66 km away
  54. 1.813 km ENE of East Foothills, California · 14461 days ago · 7 km deep · 18 km away
  55. 1.718 km NE of East Foothills, California · 14461 days ago · 8 km deep · 26 km away
  56. 2.213 km ENE of East Foothills, California · 14461 days ago · 7 km deep · 17 km away
  57. 2.812 km SE of Sunol, California · 14460 days ago · 10 km deep · 28 km away
  58. 1.613 km ENE of East Foothills, California · 14460 days ago · 7 km deep · 17 km away
  59. 2.010 km ESE of Gilroy, California · 14460 days ago · 8 km deep · 38 km away
  60. 2.015 km SSE of Livermore, California · 14459 days ago · 4 km deep · 30 km away

The first 60 of 172.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc93011. Read Tue, Sep 22, 2026, 10:30 PM UTC.