California earthquakes

M1.6 earthquake 25 km WSW of Volta, California

A magnitude 1.6 earthquake struck 25 km WSW of Volta, California on Tue, Aug 23, 1983, 7:40 AM PDT (14:40 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.5 8 km ENE of Gilroy, California. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-08-23 14:40:17 UTC
Depth
3.9 km (2.4 mi), shallow
Epicenter
37.049° N, 121.207° 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, 1.4 km in depth
Magnitude uncertainty
±0.33
Depth from
From location
Station coverage gap
99°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 124 in the 60 days after this one and 88 in the 30 days before it.

After

  1. 2.33 km SSE of San Juan Bautista, California · 15745 days ago · 4 km deep · 39 km away
  2. 2.415 km SSE of Tres Pinos, California · 15745 days ago · 3 km deep · 44 km away
  3. 2.225 km ENE of Greenfield, California · 15745 days ago · 5 km deep · 71 km away
  4. 1.67 km E of East Foothills, CA · 15744 days ago · 7 km deep · 60 km away
  5. 1.625 km NE of Soledad, California · 15744 days ago · 2 km deep · 51 km away
  6. 1.730 km ENE of Soledad, California · 15744 days ago · 7 km deep · 55 km away
  7. 2.024 km NNE of San Lucas, California · 15744 days ago · 3 km deep · 86 km away
  8. 2.323 km NE of King City, California · 15744 days ago · 5 km deep · 77 km away
  9. 1.925 km NE of Greenfield, California · 15743 days ago · 1 km deep · 69 km away
  10. 1.615 km ESE of Tres Pinos, California · 15743 days ago · 9 km deep · 36 km away
  11. 2.118 km ESE of Livermore, California · 15743 days ago · 4 km deep · 69 km away
  12. 2.229 km ENE of Soledad, California · 15742 days ago · 5 km deep · 57 km away
  13. 2.15 km SSW of Ridgemark, California · 15742 days ago · 9 km deep · 35 km away
  14. 2.924 km NE of Greenfield, California · 15742 days ago · 1 km deep · 66 km away
  15. 2.63 km SSE of San Juan Bautista, California · 15741 days ago · 4 km deep · 39 km away
  16. 1.911 km S of Tres Pinos, California · 15740 days ago · 3 km deep · 41 km away
  17. 2.119 km SSE of Tres Pinos, California · 15740 days ago · 5 km deep · 47 km away
  18. 2.523 km WNW of Three Rocks, California · 15738 days ago · 10 km deep · 72 km away
  19. 1.914 km WSW of Three Rocks, California · 15738 days ago · 19 km deep · 88 km away
  20. 2.224 km ENE of Greenfield, California · 15738 days ago · 5 km deep · 70 km away
  21. 1.69 km ENE of Milpitas, California · 15737 days ago · 7 km deep · 71 km away
  22. 1.64 km S of San Juan Bautista, California · 15737 days ago · 6 km deep · 40 km away
  23. 2.316 km SSE of Tres Pinos, California · 15736 days ago · 5 km deep · 45 km away
  24. 2.69 km NE of Gilroy, California · 15736 days ago · 8 km deep · 25 km away
  25. 1.616 km SSE of Tres Pinos, California · 15736 days ago · 5 km deep · 45 km away
  26. 1.624 km NE of Greenfield, California · 15735 days ago · 5 km deep · 64 km away
  27. 2.03 km ENE of Fremont, California · 15734 days ago · 5 km deep · 87 km away
  28. 2.03 km S of San Juan Bautista, California · 15733 days ago · 4 km deep · 39 km away
  29. 1.714 km E of Seven Trees, California · 15733 days ago · 2 km deep · 50 km away
  30. 2.32 km N of Aromas, California · 15730 days ago · 7 km deep · 42 km away
  31. 3.03 km W of Livermore, California · 15729 days ago · 16 km deep · 88 km away
  32. 2.031 km ENE of Soledad, California · 15729 days ago · 4 km deep · 59 km away
  33. 3.216 km N of Morgan Hill, California · 15728 days ago · 9 km deep · 47 km away
  34. 1.712 km S of Tres Pinos, California · 15727 days ago · 3 km deep · 42 km away
  35. 2.18 km ENE of Gilroy, California · 15727 days ago · 8 km deep · 24 km away
  36. 1.62 km SW of San Juan Bautista, California · 15726 days ago · 8 km deep · 40 km away
  37. 1.62 km SSW of Hollister, California · 15725 days ago · 7 km deep · 30 km away
  38. 1.73 km W of Livermore, California · 15725 days ago · 14 km deep · 88 km away
  39. 1.58 km ENE of San Martin, California · 15725 days ago · 7 km deep · 29 km away
  40. 2.011 km S of Tres Pinos, California · 15725 days ago · 4 km deep · 41 km away
  41. 2.133 km WNW of Three Rocks, California · 15721 days ago · 4 km deep · 64 km away
  42. 1.822 km NE of Hollister, California · 15721 days ago · 0 km deep · 6 km away
  43. 1.731 km NE of Soledad, California · 15721 days ago · 9 km deep · 51 km away
  44. 2.36 km SW of Loyola, California · 15721 days ago · 7 km deep · 88 km away
  45. 2.421 km NE of Soledad, California · 15720 days ago · 6 km deep · 55 km away
  46. 1.55 km SSW of Gilroy, California · 15719 days ago · 7 km deep · 35 km away
  47. 2.221 km NE of Soledad, California · 15719 days ago · 5 km deep · 56 km away
  48. 2.231 km ENE of Soledad, California · 15718 days ago · 9 km deep · 55 km away
  49. 1.8Central California · 15718 days ago · 8 km deep · 55 km away
  50. 2.031 km ENE of Soledad, California · 15718 days ago · 8 km deep · 56 km away
  51. 2.137 km ENE of Greenfield, California · 15718 days ago · 12 km deep · 67 km away
  52. 2.513 km E of Seven Trees, California · 15717 days ago · 3 km deep · 50 km away
  53. 1.625 km NE of Greenfield, California · 15716 days ago · 1 km deep · 69 km away
  54. 2.06 km SSE of Byron, California · 15716 days ago · 12 km deep · 92 km away
  55. 2.622 km ENE of Soledad, California · 15716 days ago · 4 km deep · 60 km away
  56. 1.922 km ENE of Soledad, California · 15716 days ago · 4 km deep · 60 km away
  57. 2.121 km SSE of Tres Pinos, California · 15716 days ago · 4 km deep · 48 km away
  58. 2.232 km SW of Three Rocks, California · 15716 days ago · 13 km deep · 96 km away
  59. 2.122 km NNE of Soledad, California · 15715 days ago · 8 km deep · 49 km away
  60. 1.66 km NNE of San Juan Bautista, California · 15715 days ago · 5 km deep · 31 km away

The first 60 of 124.

Before

  1. 2.92 km ESE of Aromas, California · 15747 days ago · 6 km deep · 41 km away
  2. 1.612 km ESE of East Foothills, California · 15747 days ago · 4 km deep · 53 km away
  3. 3.24 km S of San Juan Bautista, California · 15747 days ago · 7 km deep · 39 km away
  4. 1.82 km ESE of Aromas, California · 15747 days ago · 7 km deep · 41 km away
  5. 1.82 km E of Aromas, California · 15747 days ago · 7 km deep · 40 km away
  6. 2.12 km E of Aromas, California · 15748 days ago · 6 km deep · 41 km away
  7. 3.12 km ESE of Aromas, California · 15748 days ago · 7 km deep · 41 km away
  8. 1.912 km N of Livermore, California · 15749 days ago · 11 km deep · 96 km away
  9. 1.85 km SSW of Tres Pinos, California · 15749 days ago · 6 km deep · 35 km away
  10. 1.512 km S of Tres Pinos, California · 15749 days ago · 2 km deep · 42 km away
  11. 1.81 km WNW of Greenfield, California · 15749 days ago · 23 km deep · 80 km away
  12. 2.34 km ENE of La Honda, California · 15749 days ago · 0 km deep · 96 km away
  13. 1.611 km SSE of Livermore, California · 15750 days ago · 6 km deep · 74 km away
  14. 3.314 km SSE of Tres Pinos, California · 15750 days ago · 10 km deep · 43 km away
  15. 2.414 km SSE of Tres Pinos, California · 15750 days ago · 10 km deep · 43 km away
  16. 1.717 km SSE of Tres Pinos, California · 15750 days ago · 5 km deep · 46 km away
  17. 1.824 km ENE of Greenfield, California · 15750 days ago · 6 km deep · 71 km away
  18. 1.825 km ENE of Greenfield, California · 15750 days ago · 5 km deep · 70 km away
  19. 1.824 km NE of Greenfield, California · 15751 days ago · 4 km deep · 65 km away
  20. 2.25 km NNE of Ridgemark, California · 15751 days ago · 5 km deep · 24 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1100908. Read Fri, Oct 2, 2026, 2:10 AM UTC.