California earthquakes

M1.9 earthquake 18 km SSW of Volta, California

A magnitude 1.9 earthquake struck 18 km SSW of Volta, California on Sun, Jul 31, 1977, 3:01 PM PDT (22:01 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.3 23 km ENE of San Lucas, 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
1977-07-31 22:01:34 UTC
Depth
3.5 km (2.2 mi), shallow
Epicenter
36.948° N, 121.018° 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 0.4 km horizontally, 4.1 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
187°, poorly surrounded by stations
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 179 in the 60 days after this one and 74 in the 30 days before it.

After

  1. 2.521 km NE of Soledad, California · 17961 days ago · 3 km deep · 45 km away
  2. 2.123 km ENE of San Lucas, California · 17961 days ago · 6 km deep · 83 km away
  3. 1.623 km NE of Soledad, California · 17960 days ago · 5 km deep · 45 km away
  4. 1.924 km ENE of Greenfield, California · 17959 days ago · 5 km deep · 57 km away
  5. 1.52 km WNW of Hollister, California · 17959 days ago · 4 km deep · 38 km away
  6. 1.55 km SE of Tres Pinos, California · 17959 days ago · 6 km deep · 31 km away
  7. 1.86 km ENE of Hollister, California · 17959 days ago · 4 km deep · 29 km away
  8. 1.722 km NE of Soledad, California · 17959 days ago · 2 km deep · 47 km away
  9. 1.725 km NE of Soledad, California · 17959 days ago · 8 km deep · 42 km away
  10. 2.425 km NE of Soledad, California · 17959 days ago · 8 km deep · 42 km away
  11. 1.823 km NE of King City, California · 17958 days ago · 6 km deep · 62 km away
  12. 1.924 km WSW of Three Rocks, California · 17958 days ago · 16 km deep · 66 km away
  13. 2.59 km NNW of Hollister, California · 17957 days ago · 4 km deep · 37 km away
  14. 1.619 km SSE of Tres Pinos, California · 17956 days ago · 8 km deep · 41 km away
  15. 1.73 km W of Hollister, California · 17956 days ago · 4 km deep · 39 km away
  16. 2.01 km W of Pacific Grove, California · 17955 days ago · 12 km deep · 89 km away
  17. 1.89 km NW of Hollister, California · 17955 days ago · 7 km deep · 41 km away
  18. 2.98 km ESE of East Foothills, California · 17953 days ago · 8 km deep · 77 km away
  19. 2.28 km ESE of East Foothills, California · 17953 days ago · 7 km deep · 77 km away
  20. 2.09 km ESE of East Foothills, California · 17953 days ago · 8 km deep · 77 km away
  21. 2.65 km SSW of Tres Pinos, California · 17953 days ago · 8 km deep · 37 km away
  22. 1.85 km SSW of Tres Pinos, California · 17953 days ago · 7 km deep · 36 km away
  23. 1.65 km SSW of Tres Pinos, California · 17953 days ago · 7 km deep · 36 km away
  24. 3.323 km ENE of San Lucas, California · 17953 days ago · 8 km deep · 84 km away
  25. 1.77 km ENE of Gilroy, California · 17953 days ago · 6 km deep · 43 km away
  26. 1.622 km ENE of San Lucas, California · 17953 days ago · 7 km deep · 85 km away
  27. 1.622 km ENE of San Lucas, California · 17953 days ago · 7 km deep · 85 km away
  28. 1.722 km ENE of San Lucas, California · 17953 days ago · 8 km deep · 85 km away
  29. 1.95 km E of Interlaken, California · 17953 days ago · 12 km deep · 58 km away
  30. 1.923 km ENE of Tres Pinos, California · 17953 days ago · 5 km deep · 12 km away
  31. 1.56 km WSW of Ridgemark, California · 17952 days ago · 10 km deep · 41 km away
  32. 1.98 km NW of Hollister, California · 17952 days ago · 7 km deep · 40 km away
  33. 1.824 km NE of King City, California · 17952 days ago · 7 km deep · 62 km away
  34. 2.97 km E of East Foothills, California · 17952 days ago · 8 km deep · 79 km away
  35. 2.421 km NE of Soledad, California · 17951 days ago · 6 km deep · 46 km away
  36. 1.521 km NE of Soledad, California · 17950 days ago · 6 km deep · 46 km away
  37. 2.35 km SSW of Gilroy, California · 17950 days ago · 4 km deep · 51 km away
  38. 2.324 km NE of Greenfield, California · 17948 days ago · 7 km deep · 53 km away
  39. 1.725 km NNE of King City, California · 17948 days ago · 5 km deep · 60 km away
  40. 1.94 km W of San Juan Bautista, California · 17946 days ago · 7 km deep · 51 km away
  41. 1.724 km NE of Greenfield, California · 17946 days ago · 5 km deep · 52 km away
  42. 1.56 km ENE of East Foothills, California · 17946 days ago · 6 km deep · 82 km away
  43. 2.618 km E of East Foothills, California · 17946 days ago · 6 km deep · 69 km away
  44. 1.924 km NE of Greenfield, California · 17946 days ago · 7 km deep · 53 km away
  45. 1.630 km SE of Tres Pinos, California · 17946 days ago · 10 km deep · 37 km away
  46. 2.421 km NE of Soledad, California · 17946 days ago · 2 km deep · 45 km away
  47. 1.622 km NE of Soledad, California · 17945 days ago · 7 km deep · 45 km away
  48. 2.05 km S of Tres Pinos, California · 17945 days ago · 8 km deep · 37 km away
  49. 1.524 km SE of Tres Pinos, California · 17945 days ago · 8 km deep · 39 km away
  50. 1.526 km ENE of Soledad, California · 17945 days ago · 10 km deep · 44 km away
  51. 1.69 km NE of San Juan Bautista, California · 17945 days ago · 10 km deep · 41 km away
  52. 2.42 km WNW of Cambrian Park, California · 17945 days ago · 9 km deep · 90 km away
  53. 1.721 km NNE of Soledad, California · 17944 days ago · 1 km deep · 43 km away
  54. 3.36 km NE of East Foothills, California · 17944 days ago · 7 km deep · 84 km away
  55. 1.76 km NE of East Foothills, California · 17944 days ago · 8 km deep · 84 km away
  56. 2.017 km SSE of Tres Pinos, California · 17944 days ago · 6 km deep · 40 km away
  57. 1.718 km SSE of Tres Pinos, California · 17944 days ago · 6 km deep · 41 km away
  58. 2.324 km NE of Greenfield, California · 17943 days ago · 5 km deep · 56 km away
  59. 1.7Central California · 17942 days ago · 3 km deep · 39 km away
  60. 2.4Central California · 17941 days ago · 5 km deep · 46 km away

The first 60 of 179.

Before

  1. 1.724 km ENE of Greenfield, California · 17962 days ago · 4 km deep · 56 km away
  2. 1.718 km SE of Tres Pinos, California · 17962 days ago · 7 km deep · 35 km away
  3. 2.112 km ESE of East Foothills, California · 17963 days ago · 7 km deep · 73 km away
  4. 3.89 km NNW of Hollister, California · 17963 days ago · 8 km deep · 39 km away
  5. 1.99 km NW of Hollister, California · 17963 days ago · 3 km deep · 40 km away
  6. 1.98 km NW of Hollister, California · 17964 days ago · 9 km deep · 41 km away
  7. 2.49 km SSW of Tres Pinos, California · 17965 days ago · 2 km deep · 40 km away
  8. 1.51 km N of Hollister, California · 17966 days ago · 4 km deep · 35 km away
  9. 3.29 km NE of San Juan Bautista, California · 17966 days ago · 6 km deep · 41 km away
  10. 1.810 km SE of Livermore, California · 17966 days ago · 9 km deep · 95 km away
  11. 3.22 km ENE of Aromas, California · 17967 days ago · 5 km deep · 53 km away
  12. 1.917 km SSE of Tres Pinos, California · 17968 days ago · 7 km deep · 40 km away
  13. 1.86 km S of Tres Pinos, California · 17968 days ago · 8 km deep · 37 km away
  14. 3.024 km WSW of Three Rocks, California · 17970 days ago · 11 km deep · 66 km away
  15. 2.28 km NW of Hollister, California · 17970 days ago · 7 km deep · 41 km away
  16. 1.623 km ESE of Tres Pinos, California · 17972 days ago · 11 km deep · 31 km away
  17. 1.825 km ENE of Soledad, California · 17973 days ago · 9 km deep · 45 km away
  18. 2.525 km ENE of Soledad, California · 17973 days ago · 9 km deep · 45 km away
  19. 1.65 km S of Gilroy, California · 17974 days ago · 4 km deep · 50 km away
  20. 1.721 km NE of Soledad, California · 17974 days ago · 6 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1036045. Read Sun, Oct 4, 2026, 4:40 PM UTC.