California earthquakes

M1.7 earthquake 18 km WSW of Volta, California

A magnitude 1.7 earthquake struck 18 km WSW of Volta, California on Thu, Jan 31, 1991, 11:06 PM PST (07:06 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.6 1 km NNE of Interlaken, 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1991-02-01 07:06:12 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
37.026° N, 121.111° 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
±0.15
Depth from
From location
Station coverage gap
154°
Stations used
46

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 47 in the 30 days before it.

After

  1. 1.98 km N of Day Valley, California · 13028 days ago · 4 km deep · 68 km away
  2. 2.722 km NE of Soledad, California · 13028 days ago · 4 km deep · 49 km away
  3. 3.12 km E of Lathrop, California · 13027 days ago · 9 km deep · 89 km away
  4. 3.12 km NW of Manteca, California · 13026 days ago · 8 km deep · 88 km away
  5. 2.52 km SW of San Juan Bautista, California · 13025 days ago · 6 km deep · 45 km away
  6. 3.531 km SE of Tres Pinos, California · 13025 days ago · 10 km deep · 47 km away
  7. 2.911 km S of Tres Pinos, California · 13024 days ago · 4 km deep · 42 km away
  8. 1.911 km S of Tres Pinos, California · 13024 days ago · 4 km deep · 42 km away
  9. 1.65 km SSE of San Juan Bautista, California · 13023 days ago · 5 km deep · 44 km away
  10. 1.622 km ENE of Soledad, California · 13022 days ago · 2 km deep · 56 km away
  11. 1.66 km NE of Day Valley, California · 13022 days ago · 8 km deep · 62 km away
  12. 1.628 km SSW of South Dos Palos, California · 13022 days ago · -1 km deep · 48 km away
  13. 1.624 km NE of King City, California · 13021 days ago · 5 km deep · 72 km away
  14. 1.89 km SSW of Tres Pinos, California · 13021 days ago · 3 km deep · 41 km away
  15. 1.711 km ESE of Gilroy, California · 13020 days ago · 3 km deep · 31 km away
  16. 2.08 km NNE of East Foothills, California · 13020 days ago · 6 km deep · 76 km away
  17. 1.97 km ENE of Morgan Hill, California · 13020 days ago · 3 km deep · 44 km away
  18. 2.313 km S of Tres Pinos, California · 13020 days ago · 5 km deep · 43 km away
  19. 1.92 km SW of San Juan Bautista, California · 13019 days ago · 7 km deep · 45 km away
  20. 1.98 km ENE of Morgan Hill, California · 13018 days ago · 3 km deep · 43 km away
  21. 1.721 km NE of Soledad, California · 13018 days ago · 6 km deep · 52 km away
  22. 1.912 km SE of Tres Pinos, California · 13018 days ago · 6 km deep · 35 km away
  23. 1.910 km S of Tres Pinos, California · 13018 days ago · 8 km deep · 42 km away
  24. 3.04 km ESE of Interlaken, California · 13018 days ago · 13 km deep · 52 km away
  25. 2.54 km ESE of Interlaken, California · 13018 days ago · 12 km deep · 52 km away
  26. 1.72 km SW of San Juan Bautista, California · 13017 days ago · 6 km deep · 45 km away
  27. 1.623 km SSW of Los Banos, California · 13015 days ago · 0 km deep · 23 km away
  28. 1.923 km NNE of San Lucas, California · 13015 days ago · 5 km deep · 82 km away
  29. 1.54 km E of Interlaken, California · 13014 days ago · 11 km deep · 52 km away
  30. 2.66 km WSW of Gilroy, California · 13014 days ago · 5 km deep · 46 km away
  31. 2.05 km WSW of Gilroy, California · 13014 days ago · 4 km deep · 46 km away
  32. 2.511 km S of Tres Pinos, California · 13014 days ago · 3 km deep · 42 km away
  33. 1.65 km ENE of Corralitos, California · 13014 days ago · 12 km deep · 57 km away
  34. 1.613 km SSE of Tres Pinos, California · 13013 days ago · 9 km deep · 42 km away
  35. 1.77 km NE of Hollister, California · 13012 days ago · 6 km deep · 25 km away
  36. 1.921 km NE of Soledad, California · 13012 days ago · 6 km deep · 52 km away
  37. 2.511 km S of Tres Pinos, California · 13011 days ago · 4 km deep · 42 km away
  38. 1.65 km SW of Gilroy, California · 13011 days ago · 4 km deep · 45 km away
  39. 1.54 km E of Day Valley, California · 13010 days ago · 10 km deep · 63 km away
  40. 1.96 km NW of Day Valley, California · 13009 days ago · 12 km deep · 71 km away
  41. 1.622 km ENE of Soledad, California · 13009 days ago · 6 km deep · 55 km away
  42. 3.03 km W of San Juan Bautista, California · 13009 days ago · 6 km deep · 46 km away
  43. 1.72 km NNE of Livermore, California · 13009 days ago · 17 km deep · 94 km away
  44. 1.73 km W of San Juan Bautista, California · 13009 days ago · 6 km deep · 46 km away
  45. 1.63 km NNW of Interlaken, California · 13008 days ago · 15 km deep · 56 km away
  46. 1.813 km NE of East Foothills, California · 13008 days ago · 5 km deep · 74 km away
  47. 2.414 km E of Seven Trees, California · 13008 days ago · 3 km deep · 58 km away
  48. 2.124 km NE of Soledad, California · 13007 days ago · 10 km deep · 50 km away
  49. 3.015 km SSE of Tres Pinos, California · 13007 days ago · 3 km deep · 44 km away
  50. 1.724 km NE of King City, California · 13006 days ago · 7 km deep · 75 km away
  51. 1.824 km NE of King City, California · 13006 days ago · 8 km deep · 75 km away
  52. 1.624 km NE of King City, California · 13006 days ago · 7 km deep · 75 km away
  53. 2.18 km SSW of Tres Pinos, California · 13006 days ago · 3 km deep · 41 km away
  54. 1.518 km NE of East Foothills, California · 13005 days ago · 7 km deep · 74 km away
  55. 1.524 km NE of King City, California · 13005 days ago · 6 km deep · 75 km away
  56. 2.32 km WNW of San Juan Bautista, California · 13005 days ago · 6 km deep · 45 km away
  57. 1.95 km SSW of Davenport, California · 13005 days ago · 5 km deep · 99 km away
  58. 2.22 km E of Corralitos, California · 13005 days ago · 15 km deep · 59 km away
  59. 1.73 km NE of Soquel, California · 13005 days ago · 3 km deep · 72 km away
  60. 2.114 km E of Seven Trees, California · 13005 days ago · 2 km deep · 58 km away

The first 60 of 171.

Before

  1. 1.72 km WSW of San Juan Bautista, California · 13030 days ago · 6 km deep · 45 km away
  2. 1.96 km S of Gonzales, California · 13030 days ago · 9 km deep · 71 km away
  3. 1.67 km E of East Foothills, California · 13031 days ago · 8 km deep · 67 km away
  4. 2.121 km NE of Soledad, California · 13031 days ago · 3 km deep · 54 km away
  5. 2.113 km SE of Sunol, California · 13031 days ago · 4 km deep · 80 km away
  6. 2.55 km NNW of Hollister, California · 13032 days ago · 3 km deep · 32 km away
  7. 1.821 km NE of Soledad, California · 13033 days ago · 5 km deep · 53 km away
  8. 1.923 km ENE of San Lucas, California · 13033 days ago · 5 km deep · 94 km away
  9. 2.120 km ESE of East Foothills, California · 13035 days ago · 5 km deep · 54 km away
  10. 2.06 km NE of Ridgemark, California · 13037 days ago · 6 km deep · 27 km away
  11. 1.721 km NE of Soledad, California · 13038 days ago · 2 km deep · 51 km away
  12. 1.721 km NE of Soledad, California · 13038 days ago · 7 km deep · 52 km away
  13. 1.521 km NE of Soledad, California · 13039 days ago · 4 km deep · 53 km away
  14. 2.923 km ENE of San Lucas, California · 13040 days ago · 8 km deep · 92 km away
  15. 2.29 km ESE of East Foothills, California · 13040 days ago · 7 km deep · 64 km away
  16. 2.715 km SSE of Tres Pinos, California · 13040 days ago · 5 km deep · 44 km away
  17. 2.224 km NE of Greenfield, California · 13041 days ago · 7 km deep · 62 km away
  18. 1.923 km NE of King City, California · 13041 days ago · 5 km deep · 74 km away
  19. 1.61 km W of Cambrian Park, California · 13041 days ago · 3 km deep · 79 km away
  20. 2.126 km NE of King City, California · 13042 days ago · 6 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc205660. Read Sun, Oct 4, 2026, 4:43 AM UTC.