California earthquakes

M1.9 earthquake 3 km SE of Sunol, California

A magnitude 1.9 earthquake struck 3 km SE of Sunol, California on Thu, Oct 23, 1975, 7:27 AM PDT (14:27 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.4 9 km NNW of Hollister, California. This one was a foreshock.

Sunol forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
1.9 (md), micro
Local time
UTC
1975-10-23 14:27:26 UTC
Depth
9.6 km (6.0 mi), shallow
Epicenter
37.572° N, 121.862° 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, 0.4 km in depth
Magnitude uncertainty
±0.62
Depth from
From location
Station coverage gap
133°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 152 in the 60 days after this one and 67 in the 30 days before it.

After

  1. 2.411 km N of Morgan Hill, California · 18605 days ago · 6 km deep · 42 km away
  2. 2.817 km SW of Volta, California · 18604 days ago · 0 km deep · 97 km away
  3. 1.74 km E of East Foothills, California · 18604 days ago · 1 km deep · 24 km away
  4. 3.78 km NW of Hollister, California · 18604 days ago · 7 km deep · 81 km away
  5. 2.415 km ENE of Gilroy, California · 18604 days ago · 7 km deep · 72 km away
  6. 2.11 km W of Tres Pinos, California · 18604 days ago · 5 km deep · 99 km away
  7. 2.54 km WSW of Gilroy, California · 18603 days ago · 6 km deep · 68 km away
  8. 2.28 km NW of Hollister, California · 18603 days ago · 5 km deep · 82 km away
  9. 2.01 km NNE of Hollister, California · 18603 days ago · 8 km deep · 89 km away
  10. 3.11 km E of Ridgemark, California · 18603 days ago · 7 km deep · 96 km away
  11. 1.811 km NNE of Morgan Hill, California · 18602 days ago · 1 km deep · 44 km away
  12. 1.61 km NE of Benicia, California · 18602 days ago · 7 km deep · 60 km away
  13. 2.53 km NE of Benicia, California · 18602 days ago · 10 km deep · 60 km away
  14. 2.37 km N of Pittsburg, California · 18601 days ago · 15 km deep · 58 km away
  15. 2.3Central California · 18600 days ago · 5 km deep · 79 km away
  16. 2.010 km NNW of Hollister, California · 18600 days ago · 5 km deep · 79 km away
  17. 2.53 km ENE of Diablo, California · 18599 days ago · 7 km deep · 31 km away
  18. 2.02 km ENE of Diablo, California · 18599 days ago · 5 km deep · 31 km away
  19. 2.58 km NE of Interlaken, California · 18599 days ago · 9 km deep · 66 km away
  20. 1.525 km SE of Livermore, California · 18599 days ago · 0 km deep · 26 km away
  21. 1.7Northern California · 18598 days ago · 4 km deep · 46 km away
  22. 1.92 km N of Blackhawk, California · 18598 days ago · 9 km deep · 31 km away
  23. 2.07 km NNE of East Foothills, California · 18598 days ago · 10 km deep · 17 km away
  24. 2.27 km ENE of Interlaken, California · 18598 days ago · 8 km deep · 67 km away
  25. 2.39 km NW of Hollister, California · 18597 days ago · 4 km deep · 80 km away
  26. 2.517 km SW of Volta, California · 18597 days ago · 0 km deep · 97 km away
  27. 2.56 km ENE of Interlaken, California · 18596 days ago · 6 km deep · 69 km away
  28. 2.29 km NW of Hollister, California · 18596 days ago · 9 km deep · 81 km away
  29. 1.97 km W of Gilroy, California · 18595 days ago · 3 km deep · 67 km away
  30. 1.99 km NW of Hollister, California · 18595 days ago · 4 km deep · 81 km away
  31. 2.17 km WNW of Broadmoor, California · 18595 days ago · 3 km deep · 63 km away
  32. 3.61 km SW of San Juan Bautista, California · 18595 days ago · 4 km deep · 87 km away
  33. 1.67 km NW of Livermore, California · 18595 days ago · 12 km deep · 17 km away
  34. 1.63 km ENE of Diablo, California · 18594 days ago · 3 km deep · 31 km away
  35. 2.58 km NE of San Martin, California · 18594 days ago · 8 km deep · 57 km away
  36. 1.520 km SSE of Livermore, California · 18594 days ago · 0 km deep · 20 km away
  37. 2.75 km NE of Interlaken, California · 18594 days ago · 4 km deep · 67 km away
  38. 4.010 km NNW of Hollister, California · 18593 days ago · 7 km deep · 79 km away
  39. 2.910 km NNW of Hollister, California · 18593 days ago · 6 km deep · 79 km away
  40. 2.610 km NNW of Hollister, California · 18593 days ago · 5 km deep · 79 km away
  41. 1.810 km NNW of Hollister, California · 18593 days ago · 4 km deep · 79 km away
  42. 3.110 km NNW of Hollister, California · 18593 days ago · 5 km deep · 79 km away
  43. 2.310 km NNW of Hollister, California · 18593 days ago · 5 km deep · 79 km away
  44. 1.721 km NE of East Foothills, California · 18593 days ago · 3 km deep · 22 km away
  45. 1.88 km NE of San Martin, California · 18593 days ago · 3 km deep · 55 km away
  46. 3.19 km NW of Hollister, California · 18592 days ago · 4 km deep · 81 km away
  47. 2.02 km ENE of Berkeley, California · 18592 days ago · 10 km deep · 48 km away
  48. 2.43 km W of Livermore, California · 18592 days ago · 16 km deep · 13 km away
  49. 2.69 km NW of Hollister, California · 18592 days ago · 5 km deep · 81 km away
  50. 3.69 km NW of Hollister, California · 18592 days ago · 6 km deep · 81 km away
  51. 2.42 km NE of San Leandro, California · 18591 days ago · 4 km deep · 31 km away
  52. 2.314 km E of Seven Trees, California · 18591 days ago · 1 km deep · 36 km away
  53. 2.910 km NNW of Hollister, California · 18590 days ago · 5 km deep · 79 km away
  54. 1.510 km NE of Blackhawk, California · 18589 days ago · 10 km deep · 35 km away
  55. 2.010 km NNW of Hollister, California · 18589 days ago · 5 km deep · 79 km away
  56. 1.612 km SSE of Livermore, California · 18588 days ago · 4 km deep · 14 km away
  57. 3.021 km NE of East Foothills, California · 18588 days ago · 4 km deep · 22 km away
  58. 3.38 km SSE of San Juan Bautista, California · 18588 days ago · 9 km deep · 94 km away
  59. 2.512 km SE of Sunol, California · 18588 days ago · 7 km deep · 9 km away
  60. 2.215 km E of Seven Trees, California · 18588 days ago · 8 km deep · 35 km away

The first 60 of 152.

Before

  1. 2.82 km S of Stanford, California · 18606 days ago · 6 km deep · 33 km away
  2. 2.32 km SW of San Juan Bautista, California · 18606 days ago · 8 km deep · 87 km away
  3. 2.39 km NW of Hollister, California · 18607 days ago · 4 km deep · 81 km away
  4. 2.97 km ENE of Gilroy, California · 18607 days ago · 8 km deep · 68 km away
  5. 2.0Central California · 18607 days ago · 4 km deep · 81 km away
  6. 1.99 km NW of Hollister, California · 18608 days ago · 4 km deep · 81 km away
  7. 2.713 km NNE of East Foothills, California · 18608 days ago · 7 km deep · 12 km away
  8. 2.66 km SSW of Gilroy, California · 18608 days ago · 7 km deep · 73 km away
  9. 1.7Central California · 18608 days ago · 5 km deep · 99 km away
  10. 2.68 km NE of San Juan Bautista, California · 18609 days ago · 4 km deep · 82 km away
  11. 1.83 km ENE of San Ramon, California · 18609 days ago · 10 km deep · 26 km away
  12. 2.29 km NW of Hollister, California · 18609 days ago · 2 km deep · 80 km away
  13. 2.09 km NNW of Hollister, California · 18609 days ago · 3 km deep · 80 km away
  14. 2.5Central California · 18610 days ago · 4 km deep · 76 km away
  15. 2.68 km NE of San Juan Bautista, California · 18610 days ago · 5 km deep · 81 km away
  16. 1.89 km SE of Alum Rock, California · 18611 days ago · 4 km deep · 30 km away
  17. 2.85 km S of Gilroy, California · 18611 days ago · 6 km deep · 73 km away
  18. 1.56 km NE of East Foothills, California · 18611 days ago · 7 km deep · 20 km away
  19. 2.63 km S of Fairview, California · 18612 days ago · 6 km deep · 18 km away
  20. 2.96 km NE of East Foothills, California · 18613 days ago · 6 km deep · 20 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1027129. Read Thu, Oct 1, 2026, 12:59 AM UTC.