California earthquakes

M2.3 earthquake 8 km W of Volta, California

A magnitude 2.3 earthquake struck 8 km W of Volta, California on Tue, Aug 21, 1990, 10:54 AM PDT (17:54 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M4.4 14 km S of Tres Pinos, 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
2.3 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-08-21 17:54:47 UTC
Depth
1.5 km (0.9 mi), shallow
Epicenter
37.094° N, 121.026° 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, 2.8 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
179°
Stations used
40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 2.02 km NNE of Corralitos, California · 13192 days ago · 14 km deep · 69 km away
  2. 2.66 km ENE of Corralitos, California · 13192 days ago · 7 km deep · 64 km away
  3. 2.45 km NE of Amesti, California · 13192 days ago · 8 km deep · 64 km away
  4. 1.54 km WSW of Ridgemark, California · 13192 days ago · 5 km deep · 47 km away
  5. 1.614 km ENE of East Foothills, California · 13191 days ago · 4 km deep · 68 km away
  6. 1.95 km WNW of San Juan Bautista, California · 13191 days ago · 7 km deep · 57 km away
  7. 1.57 km WSW of Monte Sereno, California · 13191 days ago · 12 km deep · 93 km away
  8. 3.67 km WSW of Monte Sereno, California · 13191 days ago · 13 km deep · 93 km away
  9. 1.96 km WSW of Monte Sereno, California · 13191 days ago · 12 km deep · 93 km away
  10. 1.66 km NE of East Foothills, California · 13191 days ago · 7 km deep · 74 km away
  11. 1.924 km ENE of Greenfield, California · 13191 days ago · 5 km deep · 73 km away
  12. 2.02 km N of Scotts Valley, California · 13191 days ago · 11 km deep · 88 km away
  13. 1.917 km SSE of Tres Pinos, California · 13190 days ago · 5 km deep · 54 km away
  14. 1.731 km SSW of Los Banos, California · 13189 days ago · 1 km deep · 34 km away
  15. 1.9Northern California · 13189 days ago · 6 km deep · 88 km away
  16. 1.74 km E of Interlaken, California · 13189 days ago · 9 km deep · 61 km away
  17. 3.33 km NW of Day Valley, California · 13189 days ago · 6 km deep · 76 km away
  18. 3.512 km S of Tres Pinos, CA · 13188 days ago · 5 km deep · 52 km away
  19. 3.012 km S of Tres Pinos, California · 13188 days ago · 5 km deep · 52 km away
  20. 2.59 km S of Tres Pinos, California · 13188 days ago · 3 km deep · 51 km away
  21. 2.324 km NE of Soledad, California · 13188 days ago · 1 km deep · 61 km away
  22. 1.51 km ESE of Aromas, California · 13188 days ago · 8 km deep · 58 km away
  23. 2.423 km ENE of Soledad, California · 13188 days ago · 4 km deep · 67 km away
  24. 2.5Central California · 13188 days ago · 2 km deep · 59 km away
  25. 2.04 km E of Day Valley, California · 13188 days ago · 11 km deep · 70 km away
  26. 2.01 km ESE of Aromas, California · 13188 days ago · 8 km deep · 58 km away
  27. 2.4Central California · 13187 days ago · 9 km deep · 58 km away
  28. 2.17 km ESE of Catheys Valley, California · 13187 days ago · 0 km deep · 96 km away
  29. 1.61 km NE of Aromas, California · 13187 days ago · 5 km deep · 58 km away
  30. 2.49 km S of Tres Pinos, California · 13187 days ago · 2 km deep · 51 km away
  31. 1.87 km WNW of Lexington Hills, California · 13187 days ago · 14 km deep · 91 km away
  32. 2.022 km NE of Soledad, California · 13186 days ago · 8 km deep · 61 km away
  33. 2.86 km WSW of Monte Sereno, California · 13186 days ago · 12 km deep · 93 km away
  34. 1.56 km N of Tres Pinos, California · 13186 days ago · 6 km deep · 37 km away
  35. 1.97 km NW of Day Valley, California · 13185 days ago · 11 km deep · 79 km away
  36. 2.511 km S of Tres Pinos, California · 13185 days ago · 4 km deep · 52 km away
  37. 2.46 km SSW of Saratoga, California · 13185 days ago · 12 km deep · 93 km away
  38. 1.68 km N of East Foothills, California · 13184 days ago · 6 km deep · 80 km away
  39. 3.012 km S of Tres Pinos, California · 13184 days ago · 5 km deep · 52 km away
  40. 2.412 km S of Tres Pinos, California · 13184 days ago · 5 km deep · 52 km away
  41. 2.612 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 52 km away
  42. 1.56 km NE of Ridgemark, California · 13182 days ago · 7 km deep · 37 km away
  43. 1.912 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 52 km away
  44. 1.912 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 52 km away
  45. 1.612 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 53 km away
  46. 1.85 km NW of Day Valley, California · 13182 days ago · 13 km deep · 78 km away
  47. 2.26 km NE of Ridgemark, California · 13182 days ago · 6 km deep · 37 km away
  48. 2.9Central California · 13182 days ago · 9 km deep · 55 km away
  49. 1.63 km ESE of Lexington Hills, California · 13181 days ago · 4 km deep · 81 km away
  50. 3.513 km S of Tres Pinos, California · 13181 days ago · 6 km deep · 53 km away
  51. 2.813 km S of Tres Pinos, California · 13181 days ago · 6 km deep · 53 km away
  52. 1.913 km S of Tres Pinos, California · 13181 days ago · 3 km deep · 52 km away
  53. 3.313 km SSE of Tres Pinos, California · 13180 days ago · 6 km deep · 53 km away
  54. 2.314 km SSE of Tres Pinos, California · 13180 days ago · 5 km deep · 53 km away
  55. 1.714 km SSE of Tres Pinos, California · 13180 days ago · 5 km deep · 53 km away
  56. 1.614 km E of Seven Trees, California · 13180 days ago · 1 km deep · 61 km away
  57. 1.819 km WSW of Volta, California · 13180 days ago · 1 km deep · 11 km away
  58. 1.713 km S of Tres Pinos, California · 13180 days ago · 5 km deep · 53 km away
  59. 2.314 km SSE of Tres Pinos, California · 13180 days ago · 5 km deep · 53 km away
  60. 1.524 km NE of Greenfield, California · 13180 days ago · 5 km deep · 69 km away

The first 60 of 178.

Before

  1. 2.7Central California · 13192 days ago · 8 km deep · 61 km away
  2. 1.722 km NE of Soledad, California · 13193 days ago · 8 km deep · 61 km away
  3. 1.812 km SE of Tres Pinos, California · 13193 days ago · 2 km deep · 45 km away
  4. 1.68 km NE of San Martin, California · 13193 days ago · 7 km deep · 45 km away
  5. 2.94 km SE of Aromas, California · 13193 days ago · 7 km deep · 57 km away
  6. 1.922 km NE of Soledad, California · 13193 days ago · 2 km deep · 62 km away
  7. 3.11 km ESE of Aromas, California · 13193 days ago · 9 km deep · 58 km away
  8. 1.55 km WNW of San Juan Bautista, California · 13194 days ago · 6 km deep · 56 km away
  9. 2.022 km NE of Soledad, California · 13194 days ago · 8 km deep · 61 km away
  10. 1.64 km ESE of Interlaken, California · 13194 days ago · 12 km deep · 61 km away
  11. 1.522 km NE of Soledad, California · 13194 days ago · 8 km deep · 61 km away
  12. 2.022 km NE of Soledad, California · 13194 days ago · 8 km deep · 61 km away
  13. 1.511 km ESE of Alum Rock, California · 13195 days ago · 0 km deep · 66 km away
  14. 1.630 km NE of Soledad, California · 13195 days ago · 8 km deep · 57 km away
  15. 2.24 km NE of Tres Pinos, California · 13196 days ago · 8 km deep · 38 km away
  16. 3.715 km E of Seven Trees, California · 13197 days ago · 7 km deep · 61 km away
  17. 1.922 km NE of Soledad, California · 13197 days ago · 8 km deep · 61 km away
  18. 1.921 km W of Three Rocks, California · 13197 days ago · 9 km deep · 73 km away
  19. 2.63 km ENE of Interlaken, California · 13199 days ago · 8 km deep · 61 km away
  20. 1.87 km NE of Gilroy, California · 13199 days ago · 3 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc163008. Read Sun, Oct 4, 2026, 1:53 AM UTC.