California earthquakes

M1.7 earthquake 14 km E of Seven Trees, California

A magnitude 1.7 earthquake struck 14 km E of Seven Trees, California on Fri, Sep 18, 1981, 3:26 AM PDT (10:26 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.0 3 km S of San Juan Bautista, 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1981-09-18 10:26:10 UTC
Depth
4.1 km (2.5 mi), shallow
Epicenter
37.291° N, 121.671° 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
±0.15
Depth from
From location
Station coverage gap
61°
Stations used
53

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 58 in the 30 days before it.

After

  1. 1.511 km SSE of Tres Pinos, California · 16451 days ago · 16 km deep · 75 km away
  2. 1.521 km ENE of East Foothills, California · 16449 days ago · 6 km deep · 21 km away
  3. 2.19 km ESE of East Foothills, California · 16449 days ago · 5 km deep · 8 km away
  4. 3.313 km SSE of Tres Pinos, California · 16448 days ago · 3 km deep · 77 km away
  5. 2.121 km NE of Soledad, California · 16448 days ago · 4 km deep · 93 km away
  6. 2.03 km SW of Davenport, California · 16448 days ago · 11 km deep · 59 km away
  7. 2.44 km SW of Tres Pinos, California · 16447 days ago · 9 km deep · 65 km away
  8. 1.82 km NNE of Woodside, California · 16447 days ago · 5 km deep · 53 km away
  9. 1.82 km E of Tres Pinos, California · 16446 days ago · 8 km deep · 65 km away
  10. 1.720 km W of Volta, California · 16446 days ago · 0 km deep · 51 km away
  11. 2.330 km ENE of Soledad, California · 16446 days ago · 7 km deep · 98 km away
  12. 1.88 km ENE of Blackhawk, California · 16446 days ago · 14 km deep · 63 km away
  13. 3.23 km S of San Juan Bautista, California · 16445 days ago · 8 km deep · 54 km away
  14. 3.13 km S of San Juan Bautista, California · 16445 days ago · 7 km deep · 55 km away
  15. 1.64 km S of San Juan Bautista, California · 16445 days ago · 7 km deep · 55 km away
  16. 1.84 km SW of Tres Pinos, California · 16444 days ago · 8 km deep · 65 km away
  17. 1.85 km E of Fremont, California · 16443 days ago · 9 km deep · 36 km away
  18. 2.118 km SSE of Tres Pinos, California · 16443 days ago · 5 km deep · 82 km away
  19. 1.75 km SSW of Gilroy, California · 16443 days ago · 4 km deep · 37 km away
  20. 2.39 km ESE of East Foothills, California · 16443 days ago · 8 km deep · 7 km away
  21. 2.49 km NE of Gilroy, California · 16442 days ago · 9 km deep · 29 km away
  22. 2.123 km NE of Soledad, California · 16442 days ago · 9 km deep · 94 km away
  23. 3.131 km NE of Soledad, California · 16442 days ago · 8 km deep · 95 km away
  24. 1.67 km SSE of Gilroy, California · 16441 days ago · 5 km deep · 40 km away
  25. 4.03 km S of San Juan Bautista, California · 16441 days ago · 9 km deep · 55 km away
  26. 1.812 km ESE of Tres Pinos, California · 16441 days ago · 10 km deep · 75 km away
  27. 2.44 km S of San Juan Bautista, California · 16441 days ago · 9 km deep · 55 km away
  28. 1.54 km S of San Juan Bautista, California · 16441 days ago · 8 km deep · 55 km away
  29. 2.34 km S of San Juan Bautista, California · 16441 days ago · 7 km deep · 55 km away
  30. 2.54 km SSE of San Juan Bautista, California · 16441 days ago · 7 km deep · 55 km away
  31. 2.44 km SSE of San Juan Bautista, California · 16441 days ago · 7 km deep · 55 km away
  32. 2.13 km SSW of San Juan Bautista, California · 16440 days ago · 7 km deep · 54 km away
  33. 2.74 km S of San Juan Bautista, California · 16440 days ago · 7 km deep · 55 km away
  34. 3.222 km NE of Soledad, California · 16438 days ago · 7 km deep · 89 km away
  35. 1.921 km NE of Soledad, California · 16438 days ago · 6 km deep · 89 km away
  36. 1.813 km S of Tres Pinos, California · 16438 days ago · 3 km deep · 77 km away
  37. 2.93 km ESE of Brentwood, California · 16438 days ago · 9 km deep · 71 km away
  38. 1.54 km SSE of Diablo Grande, California · 16436 days ago · 8 km deep · 36 km away
  39. 1.89 km NE of Milpitas, California · 16436 days ago · 7 km deep · 28 km away
  40. 1.921 km NE of Soledad, California · 16435 days ago · 6 km deep · 89 km away
  41. 2.322 km SE of Livermore, California · 16434 days ago · 7 km deep · 31 km away
  42. 2.33 km S of San Juan Bautista, California · 16434 days ago · 7 km deep · 54 km away
  43. 2.010 km SW of Ridgemark, California · 16434 days ago · 10 km deep · 62 km away
  44. 2.31 km NNE of Pacifica, California · 16434 days ago · 7 km deep · 81 km away
  45. 1.86 km SE of Lexington Hills, California · 16433 days ago · 13 km deep · 28 km away
  46. 1.81 km NNE of Pacifica, California · 16433 days ago · 7 km deep · 81 km away
  47. 2.110 km SSW of Tracy, California · 16433 days ago · 9 km deep · 44 km away
  48. 2.227 km E of Tres Pinos, California · 16432 days ago · 3 km deep · 84 km away
  49. 1.94 km SSE of San Juan Bautista, California · 16432 days ago · 7 km deep · 55 km away
  50. 1.621 km NE of Soledad, California · 16432 days ago · 3 km deep · 92 km away
  51. 1.57 km WSW of Ridgemark, California · 16431 days ago · 9 km deep · 59 km away
  52. 1.67 km WSW of Ridgemark, California · 16431 days ago · 9 km deep · 59 km away
  53. 1.66 km SW of Gilroy, California · 16431 days ago · 5 km deep · 36 km away
  54. 2.013 km S of Tres Pinos, California · 16431 days ago · 2 km deep · 77 km away
  55. 2.07 km WSW of Ridgemark, California · 16431 days ago · 9 km deep · 59 km away
  56. 1.76 km NE of East Foothills, California · 16431 days ago · 8 km deep · 17 km away
  57. 2.15 km NNE of San Leandro, California · 16430 days ago · 11 km deep · 67 km away
  58. 1.715 km WNW of Davenport, California · 16430 days ago · 4 km deep · 63 km away
  59. 2.19 km ESE of East Foothills, California · 16427 days ago · 7 km deep · 7 km away
  60. 2.87 km WSW of Ridgemark, California · 16426 days ago · 9 km deep · 59 km away

The first 60 of 139.

Before

  1. 1.69 km SSW of Tres Pinos, California · 16452 days ago · 2 km deep · 71 km away
  2. 2.54 km SW of Tres Pinos, California · 16452 days ago · 9 km deep · 65 km away
  3. 1.75 km WNW of Broadmoor, California · 16452 days ago · 4 km deep · 89 km away
  4. 1.615 km N of Morgan Hill, California · 16453 days ago · 6 km deep · 4 km away
  5. 1.615 km N of Morgan Hill, California · 16453 days ago · 6 km deep · 4 km away
  6. 2.011 km SSW of Loyola, California · 16455 days ago · 9 km deep · 44 km away
  7. 1.65 km SW of Ridgemark, California · 16455 days ago · 9 km deep · 62 km away
  8. 2.113 km S of Tres Pinos, California · 16455 days ago · 3 km deep · 76 km away
  9. 3.313 km S of Tres Pinos, California · 16455 days ago · 4 km deep · 76 km away
  10. 2.67 km W of Gilroy, California · 16456 days ago · 4 km deep · 33 km away
  11. 1.77 km ESE of Prunedale, California · 16456 days ago · 8 km deep · 60 km away
  12. 3.09 km NE of San Martin, California · 16457 days ago · 8 km deep · 19 km away
  13. 1.61 km WSW of Belmont, California · 16458 days ago · 3 km deep · 60 km away
  14. 1.530 km E of Tres Pinos, California · 16458 days ago · 5 km deep · 83 km away
  15. 2.128 km SW of South Dos Palos, CA · 16459 days ago · 4 km deep · 90 km away
  16. 2.96 km S of San Juan Bautista, California · 16460 days ago · 10 km deep · 57 km away
  17. 3.26 km S of San Juan Bautista, California · 16460 days ago · 11 km deep · 57 km away
  18. 1.62 km SSW of San Juan Bautista, California · 16461 days ago · 6 km deep · 53 km away
  19. 2.19 km ENE of Morgan Hill, California · 16461 days ago · 6 km deep · 18 km away
  20. 3.121 km NE of Soledad, California · 16461 days ago · 5 km deep · 96 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1067760. Read Sat, Oct 3, 2026, 5:28 PM UTC.