California earthquakes

M1.9 earthquake 9 km W of Volta, California

A magnitude 1.9 earthquake struck 9 km W of Volta, California on Fri, Oct 7, 1983, 8:58 AM PDT (15:58 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M3.6 12 km ESE of East Foothills, 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-10-07 15:58:31 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
37.096° N, 121.030° 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 0.5 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
179°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 73 in the 30 days before it.

After

  1. 2.58 km NE of Morgan Hill, California · 15700 days ago · 3 km deep · 50 km away
  2. 1.537 km SSW of South Dos Palos, California · 15699 days ago · 5 km deep · 53 km away
  3. 1.57 km NE of Livermore, California · 15697 days ago · 9 km deep · 91 km away
  4. 1.88 km ENE of Livermore, California · 15697 days ago · 8 km deep · 91 km away
  5. 2.521 km NE of Soledad, California · 15697 days ago · 5 km deep · 59 km away
  6. 3.17 km E of East Foothills, California · 15697 days ago · 8 km deep · 69 km away
  7. 2.67 km E of East Foothills, California · 15697 days ago · 8 km deep · 69 km away
  8. 1.637 km ENE of Greenfield, California · 15697 days ago · 14 km deep · 67 km away
  9. 1.68 km SSW of Tres Pinos, California · 15696 days ago · 7 km deep · 50 km away
  10. 2.422 km NE of Soledad, California · 15696 days ago · 4 km deep · 58 km away
  11. 2.421 km NE of Soledad, California · 15696 days ago · 5 km deep · 59 km away
  12. 1.8Central California · 15695 days ago · 6 km deep · 54 km away
  13. 2.314 km S of Mountain House, California · 15695 days ago · 9 km deep · 78 km away
  14. 2.522 km NE of Soledad, California · 15694 days ago · 7 km deep · 61 km away
  15. 1.67 km SSE of San Juan Bautista, California · 15694 days ago · 9 km deep · 56 km away
  16. 1.621 km NE of Soledad, California · 15693 days ago · 3 km deep · 60 km away
  17. 1.921 km NE of Soledad, California · 15693 days ago · 4 km deep · 61 km away
  18. 2.0Central California · 15693 days ago · 4 km deep · 69 km away
  19. 1.727 km ENE of Soledad, California · 15693 days ago · 6 km deep · 63 km away
  20. 1.74 km SW of Tres Pinos, California · 15692 days ago · 8 km deep · 47 km away
  21. 1.5Central California · 15692 days ago · 9 km deep · 47 km away
  22. 2.111 km NNE of Livermore, California · 15691 days ago · 13 km deep · 99 km away
  23. 1.93 km NE of Fremont, California · 15689 days ago · 4 km deep · 98 km away
  24. 1.921 km SW of Los Banos, California · 15689 days ago · 0 km deep · 22 km away
  25. 1.814 km E of Seven Trees, California · 15688 days ago · 7 km deep · 62 km away
  26. 1.725 km ENE of Soledad, California · 15688 days ago · 7 km deep · 61 km away
  27. 2.27 km NE of San Juan Bautista, California · 15686 days ago · 5 km deep · 46 km away
  28. 1.98 km ENE of Morgan Hill, California · 15685 days ago · 2 km deep · 48 km away
  29. 3.612 km ESE of East Foothills, California · 15684 days ago · 7 km deep · 64 km away
  30. 2.23 km W of Livermore, California · 15684 days ago · 14 km deep · 94 km away
  31. 2.43 km W of Livermore, California · 15684 days ago · 16 km deep · 95 km away
  32. 1.68 km NE of Milpitas, California · 15684 days ago · 6 km deep · 84 km away
  33. 1.931 km ENE of Soledad, California · 15683 days ago · 7 km deep · 58 km away
  34. 1.822 km NE of Soledad, California · 15682 days ago · 8 km deep · 60 km away
  35. 2.723 km ENE of Soledad, California · 15682 days ago · 5 km deep · 65 km away
  36. 1.931 km ENE of Soledad, California · 15681 days ago · 8 km deep · 57 km away
  37. 2.08 km SW of Ridgemark, California · 15680 days ago · 7 km deep · 52 km away
  38. 1.625 km ENE of Greenfield, California · 15680 days ago · 2 km deep · 73 km away
  39. 1.614 km E of Seven Trees, California · 15679 days ago · 2 km deep · 61 km away
  40. 2.213 km S of Tres Pinos, California · 15679 days ago · 2 km deep · 53 km away
  41. 1.78 km N of Hollister, California · 15679 days ago · 8 km deep · 39 km away
  42. 1.91 km ESE of Catheys Valley, California · 15678 days ago · 6 km deep · 92 km away
  43. 2.521 km NE of Soledad, California · 15677 days ago · 5 km deep · 59 km away
  44. 1.529 km ENE of Soledad, California · 15677 days ago · 8 km deep · 63 km away
  45. 1.730 km ENE of Soledad, California · 15676 days ago · 8 km deep · 58 km away
  46. 1.826 km NW of Coalinga, California · 15676 days ago · 3 km deep · 98 km away
  47. 1.68 km NNW of Hollister, California · 15671 days ago · 2 km deep · 40 km away
  48. 2.424 km NE of Greenfield, California · 15671 days ago · 7 km deep · 69 km away
  49. 1.65 km SSE of San Juan Bautista, California · 15670 days ago · 5 km deep · 54 km away
  50. 2.85 km SSE of San Juan Bautista, California · 15670 days ago · 5 km deep · 54 km away
  51. 1.723 km WSW of Three Rocks, California · 15668 days ago · 12 km deep · 80 km away
  52. 1.79 km ENE of Milpitas, California · 15668 days ago · 7 km deep · 81 km away
  53. 2.012 km ESE of East Foothills, California · 15667 days ago · 7 km deep · 64 km away
  54. 1.96 km NNE of Interlaken, California · 15667 days ago · 7 km deep · 61 km away
  55. 1.721 km SSW of Three Rocks, California · 15666 days ago · 9 km deep · 97 km away
  56. 2.623 km NE of San Lucas, California · 15666 days ago · 10 km deep · 91 km away
  57. 2.29 km SSW of Tres Pinos, California · 15665 days ago · 3 km deep · 51 km away
  58. 1.59 km NNE of East Foothills, California · 15665 days ago · 7 km deep · 78 km away
  59. 2.35 km SSE of San Juan Bautista, California · 15664 days ago · 3 km deep · 54 km away
  60. 1.66 km ENE of Corralitos, California · 15664 days ago · 0 km deep · 64 km away

The first 60 of 98.

Before

  1. 3.010 km SSE of Three Rocks, California · 15701 days ago · 8 km deep · 97 km away
  2. 1.79 km SSE of Copperopolis, California · 15701 days ago · 7 km deep · 98 km away
  3. 2.39 km S of Tres Pinos, California · 15701 days ago · 4 km deep · 51 km away
  4. 1.515 km W of Three Rocks, California · 15701 days ago · 7 km deep · 78 km away
  5. 1.9Central California · 15703 days ago · 4 km deep · 53 km away
  6. 1.612 km S of Tres Pinos, California · 15703 days ago · 3 km deep · 52 km away
  7. 2.54 km SSE of San Juan Bautista, California · 15703 days ago · 5 km deep · 54 km away
  8. 3.24 km SSE of San Juan Bautista, California · 15703 days ago · 6 km deep · 54 km away
  9. 1.711 km SSW of Cantua Creek, California · 15704 days ago · 8 km deep · 99 km away
  10. 1.514 km SSE of Livermore, California · 15704 days ago · 8 km deep · 78 km away
  11. 1.538 km SSW of South Dos Palos, California · 15705 days ago · 4 km deep · 54 km away
  12. 3.112 km W of Three Rocks, California · 15705 days ago · 10 km deep · 78 km away
  13. 1.636 km SSW of South Dos Palos, California · 15706 days ago · 6 km deep · 52 km away
  14. 1.536 km WSW of Mendota, California · 15706 days ago · 3 km deep · 56 km away
  15. 2.016 km S of Three Rocks, California · 15707 days ago · 10 km deep · 100 km away
  16. 1.99 km ESE of East Foothills, California · 15708 days ago · 0 km deep · 67 km away
  17. 1.724 km NE of Greenfield, California · 15708 days ago · 7 km deep · 70 km away
  18. 2.139 km SSW of South Dos Palos, California · 15708 days ago · 4 km deep · 55 km away
  19. 2.539 km SSW of South Dos Palos, California · 15708 days ago · 3 km deep · 55 km away
  20. 2.138 km SSW of South Dos Palos, California · 15708 days ago · 5 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1104507. Read Thu, Oct 1, 2026, 1:08 PM UTC.