California earthquakes

M2.1 earthquake 18 km SSW of Volta, California

A magnitude 2.1 earthquake struck 18 km SSW of Volta, California on Sat, May 30, 1987, 8:28 PM PDT (03:28 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.6 13 km N of Morgan Hill, 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
2.1 (md), micro
Local time
UTC
1987-05-31 03:28:12 UTC
Depth
6.9 km (4.3 mi), shallow
Epicenter
36.943° N, 120.996° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
153°
Stations used
58

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 64 in the 30 days before it.

After

  1. 1.96 km SW of Ridgemark, California · 14364 days ago · 10 km deep · 42 km away
  2. 1.616 km SSE of Livermore, California · 14364 days ago · 8 km deep · 91 km away
  3. 1.79 km N of Coalinga, California · 14363 days ago · 11 km deep · 98 km away
  4. 1.918 km NNW of Coalinga, California · 14361 days ago · 9 km deep · 88 km away
  5. 3.018 km NNW of Coalinga, California · 14361 days ago · 9 km deep · 88 km away
  6. 2.014 km E of Seven Trees, California · 14361 days ago · 4 km deep · 71 km away
  7. 1.814 km E of Seven Trees, California · 14361 days ago · 3 km deep · 71 km away
  8. 1.621 km NE of Soledad, California · 14361 days ago · 2 km deep · 44 km away
  9. 1.718 km NE of East Foothills, California · 14360 days ago · 7 km deep · 88 km away
  10. 1.514 km N of Morgan Hill, California · 14360 days ago · 6 km deep · 68 km away
  11. 2.713 km N of Morgan Hill, California · 14359 days ago · 6 km deep · 67 km away
  12. 2.921 km NE of Soledad, California · 14358 days ago · 2 km deep · 44 km away
  13. 1.520 km SE of Tres Pinos, California · 14358 days ago · 9 km deep · 34 km away
  14. 1.630 km ENE of Soledad, California · 14357 days ago · 7 km deep · 42 km away
  15. 2.621 km NE of Soledad, California · 14357 days ago · 2 km deep · 44 km away
  16. 1.910 km WSW of Three Rocks, California · 14357 days ago · 6 km deep · 67 km away
  17. 1.824 km ENE of San Ardo, California · 14356 days ago · 7 km deep · 98 km away
  18. 1.521 km NE of Soledad, California · 14355 days ago · 3 km deep · 45 km away
  19. 2.515 km E of Seven Trees, California · 14355 days ago · 6 km deep · 71 km away
  20. 1.98 km ENE of Morgan Hill, California · 14355 days ago · 2 km deep · 55 km away
  21. 2.814 km N of Morgan Hill, California · 14355 days ago · 6 km deep · 67 km away
  22. 2.35 km NNE of Tres Pinos, California · 14353 days ago · 6 km deep · 29 km away
  23. 2.64 km W of San Juan Bautista, California · 14352 days ago · 6 km deep · 53 km away
  24. 2.04 km WNW of San Juan Bautista, California · 14352 days ago · 6 km deep · 53 km away
  25. 1.529 km NE of Soledad, California · 14352 days ago · 4 km deep · 41 km away
  26. 3.12 km NNW of Communications Hill, California · 14352 days ago · 10 km deep · 87 km away
  27. 2.116 km SSE of Tres Pinos, California · 14352 days ago · 5 km deep · 41 km away
  28. 2.216 km NNW of Coalinga, California · 14351 days ago · 10 km deep · 90 km away
  29. 2.215 km NNW of Coalinga, California · 14351 days ago · 11 km deep · 91 km away
  30. 1.811 km S of Tres Pinos, California · 14351 days ago · 4 km deep · 40 km away
  31. 1.524 km NE of Greenfield, California · 14351 days ago · 5 km deep · 53 km away
  32. 1.88 km NE of Interlaken, California · 14350 days ago · 4 km deep · 60 km away
  33. 1.95 km WSW of Fairmead, California · 14350 days ago · 4 km deep · 68 km away
  34. 1.922 km NNE of Soledad, California · 14350 days ago · 2 km deep · 43 km away
  35. 1.511 km ESE of Gilroy, California · 14350 days ago · 4 km deep · 40 km away
  36. 2.218 km NE of East Foothills, California · 14348 days ago · 6 km deep · 88 km away
  37. 1.915 km SSE of Tres Pinos, California · 14348 days ago · 5 km deep · 40 km away
  38. 1.523 km NNE of San Lucas, California · 14346 days ago · 4 km deep · 70 km away
  39. 2.424 km ENE of Soledad, California · 14345 days ago · 3 km deep · 50 km away
  40. 1.615 km SE of Livermore, California · 14342 days ago · 2 km deep · 91 km away
  41. 3.211 km NW of Coalinga, California · 14342 days ago · 7 km deep · 95 km away
  42. 1.99 km SSW of Ridgemark, California · 14342 days ago · 7 km deep · 43 km away
  43. 1.525 km ENE of Tres Pinos, California · 14342 days ago · 2 km deep · 10 km away
  44. 1.519 km SSE of Livermore, California · 14342 days ago · 7 km deep · 88 km away
  45. 1.94 km ESE of Interlaken, California · 14341 days ago · 10 km deep · 61 km away
  46. 2.09 km SSW of Ridgemark, California · 14340 days ago · 7 km deep · 43 km away
  47. 2.012 km N of Coalinga, California · 14340 days ago · 10 km deep · 94 km away
  48. 1.840 km ESE of Tres Pinos, California · 14340 days ago · 5 km deep · 34 km away
  49. 1.914 km E of Seven Trees, California · 14340 days ago · 1 km deep · 72 km away
  50. 2.128 km NW of Coalinga, California · 14340 days ago · 14 km deep · 80 km away
  51. 1.65 km NNE of Tres Pinos, California · 14340 days ago · 4 km deep · 29 km away
  52. 2.36 km NE of East Foothills, California · 14340 days ago · 10 km deep · 86 km away
  53. 2.021 km NE of Soledad, California · 14339 days ago · 3 km deep · 44 km away
  54. 2.214 km NNE of Coalinga, California · 14339 days ago · 8 km deep · 97 km away
  55. 1.614 km W of Coalinga, California · 14339 days ago · 10 km deep · 100 km away
  56. 1.517 km NNW of Coalinga, California · 14339 days ago · 10 km deep · 89 km away
  57. 1.619 km SSE of Livermore, California · 14339 days ago · 3 km deep · 88 km away
  58. 1.722 km NNE of Soledad, California · 14338 days ago · 4 km deep · 43 km away
  59. 2.68 km ENE of Morgan Hill, California · 14338 days ago · 3 km deep · 56 km away
  60. 2.327 km E of Tres Pinos, California · 14338 days ago · 5 km deep · 21 km away

The first 60 of 135.

Before

  1. 2.63 km ENE of East Foothills, California · 14365 days ago · 1 km deep · 86 km away
  2. 1.918 km NNW of Coalinga, California · 14365 days ago · 9 km deep · 88 km away
  3. 1.75 km WSW of Gilroy, California · 14366 days ago · 7 km deep · 57 km away
  4. 1.619 km E of East Foothills, California · 14366 days ago · 5 km deep · 70 km away
  5. 1.520 km NNW of Coalinga, California · 14366 days ago · 4 km deep · 85 km away
  6. 1.718 km NNW of Coalinga, California · 14366 days ago · 8 km deep · 88 km away
  7. 1.814 km N of Morgan Hill, California · 14366 days ago · 5 km deep · 67 km away
  8. 1.823 km NE of Greenfield, California · 14367 days ago · 5 km deep · 54 km away
  9. 1.612 km ESE of East Foothills, California · 14367 days ago · 5 km deep · 75 km away
  10. 1.623 km ENE of Soledad, California · 14368 days ago · 5 km deep · 49 km away
  11. 1.68 km ESE of East Foothills, California · 14368 days ago · 2 km deep · 79 km away
  12. 2.05 km SE of Tres Pinos, California · 14368 days ago · 7 km deep · 32 km away
  13. 1.521 km NE of Soledad, California · 14369 days ago · 6 km deep · 44 km away
  14. 1.57 km ENE of Interlaken, California · 14369 days ago · 8 km deep · 59 km away
  15. 1.514 km E of Seven Trees, California · 14369 days ago · 2 km deep · 72 km away
  16. 1.724 km NE of King City, California · 14370 days ago · 6 km deep · 64 km away
  17. 1.61 km NE of Pacific Grove, California · 14370 days ago · 4 km deep · 88 km away
  18. 2.622 km NE of Soledad, California · 14372 days ago · 4 km deep · 43 km away
  19. 1.818 km NNW of Coalinga, California · 14372 days ago · 10 km deep · 87 km away
  20. 1.816 km E of Seven Trees, California · 14372 days ago · 6 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc101215. Read Sun, Sep 27, 2026, 6:49 AM UTC.