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 Wed, Aug 26, 1981, 3:39 AM PDT (10:39 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.1 22 km SE of Livermore, 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
1981-08-26 10:39:49 UTC
Depth
3.4 km (2.1 mi), shallow
Epicenter
37.284° N, 121.665° 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, 0.4 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
35°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 136 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 2.122 km SE of Livermore, California · 16463 days ago · 6 km deep · 30 km away
  2. 2.36 km W of Soledad, California · 16463 days ago · 11 km deep · 99 km away
  3. 3.011 km SW of Brentwood, California · 16463 days ago · 16 km deep · 64 km away
  4. 1.814 km E of Seven Trees, California · 16462 days ago · 2 km deep · 1 km away
  5. 2.111 km E of Blackhawk, California · 16462 days ago · 14 km deep · 62 km away
  6. 1.715 km ESE of Tres Pinos, California · 16462 days ago · 10 km deep · 77 km away
  7. 2.37 km E of East Foothills, California · 16461 days ago · 6 km deep · 11 km away
  8. 1.89 km ENE of Gilroy, California · 16460 days ago · 9 km deep · 32 km away
  9. 2.12 km E of San Leandro, California · 16460 days ago · 5 km deep · 64 km away
  10. 2.412 km N of Livermore, California · 16460 days ago · 12 km deep · 57 km away
  11. 2.011 km S of Tres Pinos, California · 16458 days ago · 4 km deep · 73 km away
  12. 1.84 km W of Gonzales, California · 16458 days ago · 10 km deep · 88 km away
  13. 1.65 km E of Fremont, California · 16458 days ago · 9 km deep · 37 km away
  14. 2.06 km S of Sunol, California · 16457 days ago · 9 km deep · 34 km away
  15. 1.74 km N of Milpitas, California · 16456 days ago · 3 km deep · 30 km away
  16. 1.65 km E of Fremont, California · 16456 days ago · 10 km deep · 38 km away
  17. 1.99 km SSW of Tres Pinos, California · 16456 days ago · 2 km deep · 70 km away
  18. 1.518 km ESE of East Foothills, California · 16455 days ago · 1 km deep · 5 km away
  19. 1.611 km ENE of Milpitas, California · 16455 days ago · 4 km deep · 25 km away
  20. 2.221 km NE of Soledad, California · 16453 days ago · 8 km deep · 96 km away
  21. 1.65 km SSW of Tres Pinos, California · 16453 days ago · 9 km deep · 67 km away
  22. 1.89 km E of San Martin, California · 16452 days ago · 9 km deep · 27 km away
  23. 1.611 km SSW of Loyola, California · 16452 days ago · 10 km deep · 43 km away
  24. 1.55 km ESE of Aromas, California · 16451 days ago · 7 km deep · 47 km away
  25. 3.121 km NE of Soledad, California · 16451 days ago · 5 km deep · 95 km away
  26. 2.19 km ENE of Morgan Hill, California · 16450 days ago · 6 km deep · 17 km away
  27. 1.62 km SSW of San Juan Bautista, California · 16450 days ago · 6 km deep · 52 km away
  28. 3.26 km S of San Juan Bautista, California · 16450 days ago · 11 km deep · 56 km away
  29. 2.96 km S of San Juan Bautista, California · 16449 days ago · 10 km deep · 56 km away
  30. 2.128 km SW of South Dos Palos, CA · 16448 days ago · 4 km deep · 89 km away
  31. 1.530 km E of Tres Pinos, California · 16447 days ago · 5 km deep · 82 km away
  32. 1.61 km WSW of Belmont, California · 16447 days ago · 3 km deep · 61 km away
  33. 3.09 km NE of San Martin, California · 16446 days ago · 8 km deep · 18 km away
  34. 1.77 km ESE of Prunedale, California · 16445 days ago · 8 km deep · 59 km away
  35. 2.67 km W of Gilroy, California · 16445 days ago · 4 km deep · 32 km away
  36. 3.313 km S of Tres Pinos, California · 16445 days ago · 4 km deep · 75 km away
  37. 2.113 km S of Tres Pinos, California · 16444 days ago · 3 km deep · 75 km away
  38. 1.65 km SW of Ridgemark, California · 16444 days ago · 9 km deep · 61 km away
  39. 2.011 km SSW of Loyola, California · 16444 days ago · 9 km deep · 44 km away
  40. 1.615 km N of Morgan Hill, California · 16443 days ago · 6 km deep · 3 km away
  41. 1.615 km N of Morgan Hill, California · 16443 days ago · 6 km deep · 3 km away
  42. 1.75 km WNW of Broadmoor, California · 16442 days ago · 4 km deep · 90 km away
  43. 2.54 km SW of Tres Pinos, California · 16441 days ago · 9 km deep · 64 km away
  44. 1.69 km SSW of Tres Pinos, California · 16441 days ago · 2 km deep · 70 km away
  45. 1.714 km E of Seven Trees, California · 16440 days ago · 4 km deep · 1 km away
  46. 1.511 km SSE of Tres Pinos, California · 16440 days ago · 16 km deep · 74 km away
  47. 1.521 km ENE of East Foothills, California · 16438 days ago · 6 km deep · 22 km away
  48. 2.19 km ESE of East Foothills, California · 16438 days ago · 5 km deep · 9 km away
  49. 3.313 km SSE of Tres Pinos, California · 16437 days ago · 3 km deep · 76 km away
  50. 2.121 km NE of Soledad, California · 16437 days ago · 4 km deep · 92 km away
  51. 2.03 km SW of Davenport, California · 16437 days ago · 11 km deep · 59 km away
  52. 2.44 km SW of Tres Pinos, California · 16436 days ago · 9 km deep · 64 km away
  53. 1.82 km NNE of Woodside, California · 16436 days ago · 5 km deep · 54 km away
  54. 1.82 km E of Tres Pinos, California · 16436 days ago · 8 km deep · 64 km away
  55. 1.720 km W of Volta, California · 16435 days ago · 0 km deep · 50 km away
  56. 2.330 km ENE of Soledad, California · 16435 days ago · 7 km deep · 97 km away
  57. 1.88 km ENE of Blackhawk, California · 16435 days ago · 14 km deep · 64 km away
  58. 3.23 km S of San Juan Bautista, California · 16434 days ago · 8 km deep · 53 km away
  59. 3.13 km S of San Juan Bautista, California · 16434 days ago · 7 km deep · 54 km away
  60. 1.64 km S of San Juan Bautista, California · 16434 days ago · 7 km deep · 54 km away

The first 60 of 136.

Before

  1. 1.611 km E of Blackhawk, California · 16464 days ago · 13 km deep · 62 km away
  2. 1.615 km E of Seven Trees, California · 16464 days ago · 3 km deep · 0 km away
  3. 1.98 km ENE of San Martin, California · 16465 days ago · 5 km deep · 23 km away
  4. 2.33 km S of San Juan Bautista, California · 16466 days ago · 6 km deep · 54 km away
  5. 1.830 km ENE of Soledad, California · 16466 days ago · 7 km deep · 97 km away
  6. 2.18 km SW of Tres Pinos, California · 16466 days ago · 3 km deep · 66 km away
  7. 1.76 km ENE of East Foothills, California · 16468 days ago · 4 km deep · 15 km away
  8. 1.73 km NNW of Hollister, California · 16468 days ago · 7 km deep · 50 km away
  9. 3.22 km SW of San Juan Bautista, California · 16468 days ago · 5 km deep · 51 km away
  10. 1.68 km SE of San Juan Bautista, California · 16469 days ago · 5 km deep · 58 km away
  11. 1.9Central California · 16469 days ago · 4 km deep · 58 km away
  12. 3.19 km SW of Tres Pinos, CA · 16469 days ago · 2 km deep · 66 km away
  13. 1.52 km NE of Corralitos, California · 16470 days ago · 10 km deep · 33 km away
  14. 2.027 km E of Tres Pinos, California · 16470 days ago · 7 km deep · 80 km away
  15. 1.79 km SE of Livermore, California · 16471 days ago · 8 km deep · 39 km away
  16. 1.922 km ENE of Soledad, California · 16471 days ago · 3 km deep · 96 km away
  17. 1.92 km NE of Ridgemark, California · 16472 days ago · 7 km deep · 58 km away
  18. 1.612 km WNW of Davenport, California · 16472 days ago · 4 km deep · 64 km away
  19. 2.311 km SE of Sunol, California · 16473 days ago · 3 km deep · 29 km away
  20. 1.511 km S of Tres Pinos, California · 16474 days ago · 2 km deep · 73 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1067135. Read Tue, Sep 22, 2026, 9:40 PM UTC.