California earthquakes

M1.8 earthquake 20 km WSW of Volta, California

A magnitude 1.8 earthquake struck 20 km WSW of Volta, California on Wed, Jun 8, 1988, 5:41 PM PDT (00:41 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M5.3 6 km E 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1988-06-09 00:41:35 UTC
Depth
1.5 km (0.9 mi), shallow
Epicenter
37.051° N, 121.151° 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, 2.1 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
166°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 175 in the 60 days after this one and 74 in the 30 days before it.

After

  1. 1.722 km SSW of Los Banos, California · 13996 days ago · 5 km deep · 26 km away
  2. 2.722 km ESE of Tres Pinos, California · 13996 days ago · 1 km deep · 36 km away
  3. 2.35 km NE of Tres Pinos, California · 13996 days ago · 6 km deep · 27 km away
  4. 1.921 km NE of Soledad, California · 13996 days ago · 7 km deep · 53 km away
  5. 1.922 km SSW of Los Banos, California · 13995 days ago · 0 km deep · 25 km away
  6. 1.717 km SSE of Livermore, California · 13994 days ago · 3 km deep · 72 km away
  7. 1.824 km NE of Greenfield, California · 13994 days ago · 5 km deep · 65 km away
  8. 5.36 km E of East Foothills, California · 13993 days ago · 9 km deep · 65 km away
  9. 3.310 km ESE of East Foothills, California · 13993 days ago · 7 km deep · 59 km away
  10. 2.16 km ENE of East Foothills, California · 13993 days ago · 8 km deep · 65 km away
  11. 2.36 km E of East Foothills, California · 13993 days ago · 10 km deep · 65 km away
  12. 1.56 km ENE of East Foothills, California · 13993 days ago · 8 km deep · 66 km away
  13. 1.99 km ESE of East Foothills, California · 13993 days ago · 7 km deep · 60 km away
  14. 1.914 km NE of East Foothills, California · 13993 days ago · 9 km deep · 69 km away
  15. 1.67 km SSE of San Juan Bautista, California · 13993 days ago · 7 km deep · 43 km away
  16. 3.29 km ESE of East Foothills, California · 13993 days ago · 7 km deep · 61 km away
  17. 1.6Northern California · 13993 days ago · 9 km deep · 64 km away
  18. 2.26 km E of East Foothills, California · 13993 days ago · 9 km deep · 64 km away
  19. 1.66 km ENE of East Foothills, California · 13993 days ago · 8 km deep · 66 km away
  20. 1.710 km ESE of East Foothills, California · 13993 days ago · 7 km deep · 59 km away
  21. 1.7Northern California · 13993 days ago · 6 km deep · 62 km away
  22. 2.110 km ESE of East Foothills, California · 13992 days ago · 8 km deep · 59 km away
  23. 1.523 km NE of King City, California · 13992 days ago · 2 km deep · 82 km away
  24. 2.110 km ESE of East Foothills, California · 13992 days ago · 7 km deep · 59 km away
  25. 2.02 km W of Tres Pinos, California · 13992 days ago · 6 km deep · 34 km away
  26. 1.922 km NNE of Soledad, California · 13990 days ago · 8 km deep · 50 km away
  27. 2.57 km E of East Foothills, California · 13990 days ago · 7 km deep · 63 km away
  28. 2.514 km NE of East Foothills, California · 13990 days ago · 4 km deep · 68 km away
  29. 1.824 km NE of Greenfield, California · 13989 days ago · 5 km deep · 64 km away
  30. 1.624 km NE of Greenfield, California · 13989 days ago · 1 km deep · 66 km away
  31. 2.53 km SSE of San Juan Bautista, California · 13989 days ago · 5 km deep · 43 km away
  32. 1.66 km E of East Foothills, California · 13989 days ago · 9 km deep · 64 km away
  33. 1.67 km E of East Foothills, California · 13989 days ago · 9 km deep · 64 km away
  34. 1.610 km ESE of East Foothills, California · 13988 days ago · 7 km deep · 59 km away
  35. 1.615 km SE of Livermore, California · 13988 days ago · 2 km deep · 74 km away
  36. 1.97 km E of East Foothills, California · 13988 days ago · 9 km deep · 64 km away
  37. 1.523 km NE of Soledad, California · 13987 days ago · 4 km deep · 53 km away
  38. 2.022 km NE of San Lucas, California · 13987 days ago · 9 km deep · 91 km away
  39. 2.510 km S of Tres Pinos, California · 13987 days ago · 4 km deep · 43 km away
  40. 4.18 km ENE of San Martin, California · 13986 days ago · 8 km deep · 34 km away
  41. 2.98 km ENE of San Martin, California · 13985 days ago · 7 km deep · 35 km away
  42. 2.411 km S of Tres Pinos, California · 13985 days ago · 6 km deep · 43 km away
  43. 2.216 km SE of Tres Pinos, California · 13985 days ago · 7 km deep · 38 km away
  44. 2.310 km ESE of East Foothills, California · 13984 days ago · 7 km deep · 59 km away
  45. 2.34 km ESE of Aromas, California · 13984 days ago · 6 km deep · 45 km away
  46. 2.47 km E of East Foothills, California · 13983 days ago · 9 km deep · 64 km away
  47. 1.77 km E of East Foothills, California · 13983 days ago · 6 km deep · 64 km away
  48. 1.910 km ESE of East Foothills, California · 13983 days ago · 7 km deep · 59 km away
  49. 2.422 km NE of Soledad, California · 13983 days ago · 2 km deep · 57 km away
  50. 1.715 km SSE of Tres Pinos, California · 13982 days ago · 6 km deep · 46 km away
  51. 2.021 km NE of Soledad, California · 13981 days ago · 7 km deep · 55 km away
  52. 2.121 km NE of Soledad, California · 13981 days ago · 6 km deep · 55 km away
  53. 1.69 km S of Tres Pinos, California · 13981 days ago · 3 km deep · 42 km away
  54. 2.622 km ENE of East Foothills, California · 13981 days ago · 5 km deep · 63 km away
  55. 1.521 km SSE of Tres Pinos, California · 13981 days ago · 5 km deep · 49 km away
  56. 3.210 km NNE of East Foothills, California · 13980 days ago · 7 km deep · 74 km away
  57. 1.910 km NNE of East Foothills, California · 13980 days ago · 7 km deep · 73 km away
  58. 2.210 km NNE of East Foothills, California · 13980 days ago · 7 km deep · 73 km away
  59. 2.013 km ESE of Alum Rock, California · 13980 days ago · 7 km deep · 56 km away
  60. 1.610 km NNE of East Foothills, California · 13979 days ago · 6 km deep · 74 km away

The first 60 of 175.

Before

  1. 2.624 km NE of Soledad, California · 13999 days ago · 9 km deep · 53 km away
  2. 1.527 km SSW of South Dos Palos, California · 13999 days ago · -1 km deep · 53 km away
  3. 1.725 km NE of King City, California · 14000 days ago · 1 km deep · 75 km away
  4. 3.110 km WSW of Ridgemark, California · 14001 days ago · 7 km deep · 42 km away
  5. 1.718 km SSE of Livermore, California · 14001 days ago · 4 km deep · 70 km away
  6. 1.626 km ENE of East Foothills, California · 14001 days ago · 6 km deep · 62 km away
  7. 2.53 km W of San Juan Bautista, California · 14002 days ago · 6 km deep · 44 km away
  8. 2.05 km NE of Tres Pinos, California · 14003 days ago · 8 km deep · 27 km away
  9. 1.724 km NE of Greenfield, California · 14006 days ago · 6 km deep · 65 km away
  10. 1.923 km NE of King City, California · 14007 days ago · 0 km deep · 80 km away
  11. 2.216 km E of Seven Trees, California · 14008 days ago · 5 km deep · 52 km away
  12. 1.921 km NE of Soledad, California · 14008 days ago · 8 km deep · 57 km away
  13. 2.021 km NE of Soledad, California · 14008 days ago · 6 km deep · 53 km away
  14. 1.711 km SSE of Tres Pinos, California · 14010 days ago · 4 km deep · 42 km away
  15. 2.06 km NNE of Tres Pinos, California · 14010 days ago · 5 km deep · 26 km away
  16. 2.16 km NNE of Tres Pinos, California · 14010 days ago · 6 km deep · 26 km away
  17. 1.613 km ESE of East Foothills, California · 14010 days ago · 2 km deep · 57 km away
  18. 1.524 km NE of Greenfield, California · 14010 days ago · 5 km deep · 66 km away
  19. 2.011 km S of Tres Pinos, California · 14011 days ago · 4 km deep · 43 km away
  20. 1.821 km SSE of Tres Pinos, California · 14011 days ago · 4 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc118595. Read Mon, Oct 5, 2026, 4:41 AM UTC.