California earthquakes

M1.6 earthquake 9 km WSW of Volta, California

A magnitude 1.6 earthquake struck 9 km WSW of Volta, California on Mon, May 21, 1990, 9:30 PM PDT (04:30 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.1 6 km NE 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-05-22 04:30:42 UTC
Depth
6.8 km (4.2 mi), shallow
Epicenter
37.081° N, 121.031° 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 1.2 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
239°, poorly surrounded by stations
Stations used
23

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 111 in the 30 days before it.

After

  1. 1.64 km E of Interlaken, California · 13284 days ago · 11 km deep · 60 km away
  2. 1.730 km ENE of Soledad, California · 13284 days ago · 8 km deep · 58 km away
  3. 1.62 km SSW of Lexington Hills, California · 13284 days ago · 11 km deep · 84 km away
  4. 1.91 km NE of Aromas, California · 13283 days ago · 5 km deep · 57 km away
  5. 1.715 km ESE of Tres Pinos, California · 13282 days ago · 1 km deep · 43 km away
  6. 1.92 km WSW of San Juan Bautista, California · 13282 days ago · 4 km deep · 54 km away
  7. 2.05 km ESE of Interlaken, California · 13281 days ago · 11 km deep · 60 km away
  8. 2.37 km S of Sunol, California · 13281 days ago · 10 km deep · 91 km away
  9. 1.823 km NE of Soledad, California · 13281 days ago · 9 km deep · 58 km away
  10. 2.331 km ENE of Soledad, California · 13281 days ago · 8 km deep · 56 km away
  11. 2.610 km SW of Ridgemark, California · 13280 days ago · 8 km deep · 52 km away
  12. 1.65 km ESE of Interlaken, California · 13279 days ago · 11 km deep · 60 km away
  13. 1.918 km WSW of Three Rocks, California · 13279 days ago · 12 km deep · 80 km away
  14. 1.64 km S of Lexington Hills, California · 13279 days ago · 13 km deep · 83 km away
  15. 2.73 km W of San Juan Bautista, California · 13279 days ago · 6 km deep · 55 km away
  16. 2.328 km WSW of Mendota, California · 13278 days ago · -1 km deep · 57 km away
  17. 1.62 km N of Interlaken, California · 13277 days ago · 12 km deep · 64 km away
  18. 2.14 km WNW of Lexington Hills, California · 13277 days ago · 11 km deep · 88 km away
  19. 2.44 km S of Lexington Hills, California · 13277 days ago · 14 km deep · 83 km away
  20. 2.4Central California · 13277 days ago · 7 km deep · 44 km away
  21. 1.82 km S of Lexington Hills, California · 13277 days ago · 13 km deep · 84 km away
  22. 2.6Central California · 13277 days ago · 6 km deep · 55 km away
  23. 1.52 km W of San Juan Bautista, California · 13277 days ago · 6 km deep · 55 km away
  24. 2.22 km NNW of Seacliff, California · 13277 days ago · 5 km deep · 80 km away
  25. 2.89 km ESE of Livermore, California · 13276 days ago · 9 km deep · 84 km away
  26. 1.719 km SSE of Tres Pinos, California · 13276 days ago · 5 km deep · 53 km away
  27. 2.526 km WSW of Mendota, California · 13275 days ago · -1 km deep · 57 km away
  28. 1.95 km NNW of Aromas, California · 13274 days ago · 10 km deep · 59 km away
  29. 1.529 km SSW of South Dos Palos, California · 13274 days ago · 5 km deep · 45 km away
  30. 2.129 km SSW of South Dos Palos, California · 13274 days ago · 0 km deep · 45 km away
  31. 1.85 km SSW of Ridgemark, California · 13273 days ago · 5 km deep · 47 km away
  32. 1.65 km WNW of San Juan Bautista, California · 13273 days ago · 5 km deep · 55 km away
  33. 2.222 km NNE of Soledad, California · 13273 days ago · 8 km deep · 56 km away
  34. 3.03 km W of San Juan Bautista, California · 13273 days ago · 6 km deep · 55 km away
  35. 2.53 km W of San Juan Bautista, California · 13273 days ago · 6 km deep · 55 km away
  36. 1.83 km W of San Juan Bautista, California · 13273 days ago · 6 km deep · 55 km away
  37. 1.73 km W of San Juan Bautista, California · 13273 days ago · 6 km deep · 55 km away
  38. 1.93 km W of San Juan Bautista, California · 13273 days ago · 6 km deep · 55 km away
  39. 2.324 km NE of Greenfield, California · 13273 days ago · 5 km deep · 68 km away
  40. 2.83 km W of San Juan Bautista, California · 13273 days ago · 6 km deep · 55 km away
  41. 2.13 km W of San Juan Bautista, California · 13272 days ago · 6 km deep · 55 km away
  42. 2.63 km NNW of Aromas, California · 13272 days ago · 10 km deep · 59 km away
  43. 1.917 km NE of East Foothills, California · 13272 days ago · 7 km deep · 75 km away
  44. 3.22 km ESE of Aromas, California · 13272 days ago · 7 km deep · 57 km away
  45. 1.63 km W of San Juan Bautista, California · 13271 days ago · 6 km deep · 55 km away
  46. 1.524 km NE of Greenfield, California · 13271 days ago · 5 km deep · 69 km away
  47. 1.82 km E of Aromas, California · 13271 days ago · 4 km deep · 56 km away
  48. 1.822 km NNE of Soledad, California · 13271 days ago · 2 km deep · 55 km away
  49. 2.91 km ENE of Aromas, California · 13271 days ago · 6 km deep · 57 km away
  50. 1.76 km ENE of Corralitos, California · 13270 days ago · 9 km deep · 64 km away
  51. 2.113 km SSE of Tres Pinos, California · 13269 days ago · 4 km deep · 51 km away
  52. 1.911 km S of Three Rocks, California · 13268 days ago · 8 km deep · 94 km away
  53. 2.64 km ESE of Interlaken, California · 13268 days ago · 11 km deep · 60 km away
  54. 1.93 km W of San Juan Bautista, California · 13267 days ago · 7 km deep · 55 km away
  55. 1.6Central California · 13264 days ago · 8 km deep · 63 km away
  56. 3.315 km E of Seven Trees, California · 13264 days ago · 6 km deep · 60 km away
  57. 1.63 km ENE of Corralitos, California · 13264 days ago · 14 km deep · 66 km away
  58. 1.51 km NNE of Interlaken, California · 13264 days ago · 13 km deep · 63 km away
  59. 1.94 km W of San Juan Bautista, California · 13264 days ago · 8 km deep · 56 km away
  60. 2.622 km ENE of Soledad, California · 13264 days ago · 8 km deep · 63 km away

The first 60 of 175.

Before

  1. 2.020 km SSE of Tres Pinos, California · 13284 days ago · 5 km deep · 54 km away
  2. 2.224 km NE of Greenfield, California · 13285 days ago · 1 km deep · 69 km away
  3. 1.815 km SSE of Tres Pinos, California · 13285 days ago · 7 km deep · 52 km away
  4. 1.815 km SSE of Tres Pinos, California · 13285 days ago · 7 km deep · 52 km away
  5. 2.615 km SSE of Tres Pinos, California · 13285 days ago · 7 km deep · 52 km away
  6. 1.615 km SSE of Tres Pinos, California · 13285 days ago · 7 km deep · 53 km away
  7. 3.36 km SW of Ridgemark, California · 13286 days ago · 10 km deep · 49 km away
  8. 2.66 km SW of Ridgemark, California · 13286 days ago · 9 km deep · 49 km away
  9. 2.515 km SSE of Tres Pinos, California · 13287 days ago · 6 km deep · 52 km away
  10. 2.02 km N of Lexington Hills, California · 13287 days ago · 5 km deep · 84 km away
  11. 1.514 km SSE of Tres Pinos, California · 13288 days ago · 7 km deep · 52 km away
  12. 2.54 km NNW of Aromas, California · 13288 days ago · 8 km deep · 59 km away
  13. 3.114 km SSE of Tres Pinos, California · 13288 days ago · 7 km deep · 52 km away
  14. 1.94 km SSE of San Juan Bautista, California · 13288 days ago · 5 km deep · 53 km away
  15. 3.014 km SSE of Tres Pinos, California · 13288 days ago · 7 km deep · 52 km away
  16. 3.114 km SSE of Tres Pinos, California · 13288 days ago · 7 km deep · 52 km away
  17. 1.8Central California · 13288 days ago · 7 km deep · 52 km away
  18. 2.421 km NE of Soledad, California · 13288 days ago · 6 km deep · 58 km away
  19. 3.67 km E of East Foothills, California · 13288 days ago · 8 km deep · 70 km away
  20. 2.315 km SSE of Tres Pinos, California · 13290 days ago · 6 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc158116. Read Sun, Oct 4, 2026, 5:37 AM UTC.