California earthquakes

M1.9 earthquake 23 km WSW of Volta, California

A magnitude 1.9 earthquake struck 23 km WSW of Volta, California on Mon, Aug 27, 1984, 4:46 PM PDT (23:46 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M4.4 11 km ESE 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
1.9 (md), micro
Local time
UTC
1984-08-27 23:46:42 UTC
Depth
0.4 km (0.3 mi), shallow
Epicenter
37.021° N, 121.173° 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, 3.5 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
94°
Stations used
34

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 167 in the 60 days after this one and 122 in the 30 days before it.

After

  1. 1.531 km NE of San Ardo, California · 15373 days ago · 7 km deep · 96 km away
  2. 2.16 km SE of Tres Pinos, California · 15373 days ago · 9 km deep · 31 km away
  3. 1.822 km ENE of Soledad, California · 15372 days ago · 2 km deep · 55 km away
  4. 1.824 km NE of Soledad, California · 15372 days ago · 1 km deep · 51 km away
  5. 1.613 km ESE of East Foothills, California · 15372 days ago · 7 km deep · 57 km away
  6. 2.113 km E of East Foothills, California · 15371 days ago · 6 km deep · 58 km away
  7. 1.74 km NNE of Morgan Hill, California · 15371 days ago · 2 km deep · 44 km away
  8. 2.613 km N of Morgan Hill, California · 15371 days ago · 5 km deep · 49 km away
  9. 1.934 km ENE of San Lucas, California · 15370 days ago · 13 km deep · 90 km away
  10. 2.713 km N of Morgan Hill, California · 15370 days ago · 5 km deep · 49 km away
  11. 2.412 km ESE of East Foothills, California · 15369 days ago · 8 km deep · 57 km away
  12. 2.023 km ENE of Soledad, California · 15369 days ago · 3 km deep · 59 km away
  13. 2.111 km S of Tres Pinos, California · 15369 days ago · 3 km deep · 39 km away
  14. 2.617 km NNE of Morgan Hill, California · 15368 days ago · 3 km deep · 47 km away
  15. 2.017 km NNE of Morgan Hill, California · 15368 days ago · 3 km deep · 47 km away
  16. 1.823 km NE of Soledad, California · 15368 days ago · 1 km deep · 51 km away
  17. 1.79 km NNE of East Foothills, California · 15368 days ago · 7 km deep · 73 km away
  18. 1.97 km SW of Gilroy, California · 15368 days ago · 6 km deep · 41 km away
  19. 1.59 km NE of San Martin, California · 15368 days ago · 5 km deep · 37 km away
  20. 2.615 km NNE of Morgan Hill, California · 15367 days ago · 4 km deep · 46 km away
  21. 1.510 km SW of Carmel Valley Village, California · 15367 days ago · 7 km deep · 88 km away
  22. 1.813 km ESE of Alum Rock, California · 15367 days ago · 7 km deep · 56 km away
  23. 2.026 km NE of Soledad, California · 15367 days ago · 7 km deep · 50 km away
  24. 1.913 km N of Morgan Hill, California · 15366 days ago · 5 km deep · 49 km away
  25. 3.413 km N of Morgan Hill, California · 15366 days ago · 6 km deep · 49 km away
  26. 1.713 km N of Morgan Hill, California · 15364 days ago · 4 km deep · 48 km away
  27. 2.716 km E of Seven Trees, California · 15364 days ago · 8 km deep · 52 km away
  28. 2.78 km ENE of Morgan Hill, California · 15364 days ago · 2 km deep · 38 km away
  29. 2.510 km SE of San Juan Bautista, California · 15364 days ago · 6 km deep · 39 km away
  30. 2.13 km S of Merced, California · 15364 days ago · 18 km deep · 68 km away
  31. 2.26 km WSW of Gilroy, California · 15364 days ago · 3 km deep · 41 km away
  32. 1.924 km NE of Greenfield, California · 15363 days ago · 5 km deep · 61 km away
  33. 2.37 km SSE of Fairmead, California · 15363 days ago · 3 km deep · 90 km away
  34. 2.04 km SSE of San Juan Bautista, California · 15363 days ago · 6 km deep · 39 km away
  35. 1.622 km NE of Soledad, California · 15363 days ago · 2 km deep · 54 km away
  36. 2.223 km ENE of Soledad, California · 15362 days ago · 3 km deep · 59 km away
  37. 1.837 km NE of Greenfield, California · 15361 days ago · 4 km deep · 60 km away
  38. 1.79 km NNE of East Foothills, California · 15361 days ago · 6 km deep · 72 km away
  39. 2.115 km E of Seven Trees, California · 15360 days ago · 9 km deep · 52 km away
  40. 2.023 km NE of Soledad, California · 15360 days ago · 9 km deep · 51 km away
  41. 2.5Northern California · 15360 days ago · 5 km deep · 53 km away
  42. 1.915 km E of Seven Trees, California · 15360 days ago · 4 km deep · 53 km away
  43. 2.57 km NNE of Interlaken, California · 15360 days ago · 10 km deep · 48 km away
  44. 1.93 km N of Monte Sereno, California · 15360 days ago · 7 km deep · 77 km away
  45. 1.915 km E of Seven Trees, California · 15360 days ago · 5 km deep · 53 km away
  46. 1.515 km E of Seven Trees, California · 15359 days ago · 6 km deep · 53 km away
  47. 2.111 km ESE of East Foothills, California · 15358 days ago · 5 km deep · 58 km away
  48. 1.813 km ESE of East Foothills, California · 15357 days ago · 7 km deep · 57 km away
  49. 1.89 km ESE of East Foothills, California · 15357 days ago · 7 km deep · 60 km away
  50. 2.49 km ESE of East Foothills, California · 15357 days ago · 7 km deep · 60 km away
  51. 2.09 km ESE of East Foothills, California · 15357 days ago · 8 km deep · 60 km away
  52. 1.614 km N of Morgan Hill, California · 15357 days ago · 5 km deep · 49 km away
  53. 1.612 km NE of Milpitas, California · 15357 days ago · 8 km deep · 78 km away
  54. 1.617 km WNW of Diablo Grande, California · 15357 days ago · 4 km deep · 53 km away
  55. 1.69 km NNE of East Foothills, California · 15356 days ago · 7 km deep · 72 km away
  56. 1.914 km ESE of East Foothills, California · 15356 days ago · 0 km deep · 56 km away
  57. 1.916 km E of Seven Trees, California · 15355 days ago · 4 km deep · 52 km away
  58. 2.523 km NE of King City, California · 15355 days ago · 6 km deep · 73 km away
  59. 1.622 km NNE of Soledad, California · 15355 days ago · 3 km deep · 47 km away
  60. 1.7Northern California · 15355 days ago · 4 km deep · 57 km away

The first 60 of 167.

Before

  1. 2.58 km N of East Foothills, California · 15374 days ago · 2 km deep · 74 km away
  2. 2.17 km S of Sunol, California · 15375 days ago · 7 km deep · 86 km away
  3. 1.88 km ENE of Morgan Hill, California · 15376 days ago · 2 km deep · 38 km away
  4. 1.834 km WSW of Three Rocks, California · 15376 days ago · 14 km deep · 78 km away
  5. 1.716 km WSW of Soledad, California · 15376 days ago · 9 km deep · 79 km away
  6. 1.923 km ENE of Soledad, California · 15377 days ago · 3 km deep · 59 km away
  7. 1.612 km S of Catheys Valley, California · 15378 days ago · 7 km deep · 100 km away
  8. 2.213 km N of Morgan Hill, California · 15378 days ago · 5 km deep · 49 km away
  9. 3.613 km N of Morgan Hill, California · 15378 days ago · 5 km deep · 49 km away
  10. 1.913 km S of Catheys Valley, California · 15379 days ago · 4 km deep · 99 km away
  11. 1.624 km NE of Soledad, California · 15379 days ago · 4 km deep · 51 km away
  12. 2.911 km NNE of Morgan Hill, California · 15380 days ago · 9 km deep · 45 km away
  13. 1.64 km SW of Tres Pinos, California · 15380 days ago · 4 km deep · 33 km away
  14. 1.98 km SSW of Tres Pinos, California · 15380 days ago · 2 km deep · 38 km away
  15. 1.610 km NNE of Morgan Hill, California · 15381 days ago · 3 km deep · 45 km away
  16. 2.415 km N of Morgan Hill, California · 15381 days ago · 8 km deep · 51 km away
  17. 2.223 km ENE of San Lucas, California · 15381 days ago · 5 km deep · 94 km away
  18. 1.717 km NNE of Morgan Hill, California · 15382 days ago · 2 km deep · 47 km away
  19. 1.614 km E of Seven Trees, California · 15383 days ago · 6 km deep · 54 km away
  20. 1.725 km SE of Tres Pinos, California · 15383 days ago · 7 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc26513. Read Wed, Sep 30, 2026, 9:47 PM UTC.