California earthquakes

M1.6 earthquake 18 km W of Volta, California

A magnitude 1.6 earthquake struck 18 km W of Volta, California on Thu, Aug 21, 1980, 2:28 PM PDT (21:28 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M4.0 15 km SSE of Livermore, 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
1980-08-21 21:28:30 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
37.090° N, 121.139° 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, 1.1 km in depth
Magnitude uncertainty
±0.31
Depth from
From location
Station coverage gap
153°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 146 in the 60 days after this one and 61 in the 30 days before it.

After

  1. 1.66 km E of Fremont, California · 16841 days ago · 6 km deep · 85 km away
  2. 2.37 km SW of Ridgemark, California · 16840 days ago · 8 km deep · 44 km away
  3. 2.47 km SW of Ridgemark, California · 16840 days ago · 9 km deep · 44 km away
  4. 1.67 km WSW of Gilroy, California · 16840 days ago · 4 km deep · 46 km away
  5. 2.016 km SSE of Tres Pinos, California · 16840 days ago · 5 km deep · 50 km away
  6. 4.015 km SSE of Livermore, California · 16839 days ago · 3 km deep · 71 km away
  7. 2.716 km SSE of Livermore, California · 16839 days ago · 2 km deep · 70 km away
  8. 2.115 km SE of Livermore, California · 16839 days ago · 2 km deep · 70 km away
  9. 1.616 km SE of Livermore, California · 16839 days ago · 2 km deep · 70 km away
  10. 2.115 km SE of Livermore, California · 16839 days ago · 0 km deep · 71 km away
  11. 1.516 km SE of Livermore, California · 16839 days ago · 2 km deep · 70 km away
  12. 1.915 km SSE of Livermore, California · 16839 days ago · 2 km deep · 71 km away
  13. 1.515 km SE of Livermore, California · 16839 days ago · 3 km deep · 70 km away
  14. 1.82 km WSW of San Juan Bautista, California · 16839 days ago · 5 km deep · 47 km away
  15. 1.715 km SE of Livermore, California · 16839 days ago · 2 km deep · 71 km away
  16. 1.59 km NW of Hollister, California · 16837 days ago · 3 km deep · 35 km away
  17. 1.815 km SSE of Livermore, California · 16837 days ago · 3 km deep · 70 km away
  18. 2.015 km SE of Livermore, California · 16837 days ago · 3 km deep · 70 km away
  19. 2.524 km NE of King City, California · 16836 days ago · 7 km deep · 80 km away
  20. 1.815 km SE of Livermore, California · 16836 days ago · 2 km deep · 70 km away
  21. 2.815 km SE of Livermore, California · 16836 days ago · 3 km deep · 70 km away
  22. 1.816 km SE of Livermore, California · 16836 days ago · 2 km deep · 70 km away
  23. 1.717 km ESE of East Foothills, California · 16835 days ago · 6 km deep · 51 km away
  24. 2.315 km SE of Livermore, California · 16835 days ago · 3 km deep · 70 km away
  25. 1.86 km WSW of Gilroy, California · 16835 days ago · 2 km deep · 46 km away
  26. 1.615 km SE of Livermore, California · 16834 days ago · 2 km deep · 70 km away
  27. 1.824 km NE of Greenfield, California · 16834 days ago · 5 km deep · 67 km away
  28. 1.65 km SSW of Gilroy, California · 16834 days ago · 7 km deep · 42 km away
  29. 2.115 km SE of Livermore, California · 16834 days ago · 2 km deep · 70 km away
  30. 1.815 km SE of Livermore, California · 16834 days ago · 3 km deep · 70 km away
  31. 2.715 km SE of Livermore, California · 16834 days ago · 3 km deep · 70 km away
  32. 1.716 km SE of Livermore, California · 16834 days ago · 2 km deep · 70 km away
  33. 2.015 km SE of Livermore, California · 16834 days ago · 2 km deep · 70 km away
  34. 1.915 km SE of Livermore, California · 16834 days ago · 3 km deep · 70 km away
  35. 1.613 km N of Morgan Hill, California · 16833 days ago · 7 km deep · 48 km away
  36. 1.89 km ENE of Gilroy, California · 16833 days ago · 9 km deep · 30 km away
  37. 1.622 km NE of San Lucas, California · 16832 days ago · 7 km deep · 94 km away
  38. 1.74 km SSE of Sunol, California · 16832 days ago · 9 km deep · 83 km away
  39. 2.024 km ENE of Greenfield, California · 16832 days ago · 5 km deep · 74 km away
  40. 1.717 km SSE of Tres Pinos, California · 16831 days ago · 5 km deep · 51 km away
  41. 1.69 km NE of Gilroy, California · 16831 days ago · 9 km deep · 32 km away
  42. 2.121 km WSW of Volta, California · 16830 days ago · 4 km deep · 7 km away
  43. 1.514 km SSE of Tres Pinos, California · 16830 days ago · 2 km deep · 49 km away
  44. 1.812 km E of Blackhawk, California · 16830 days ago · 9 km deep · 97 km away
  45. 1.61 km ENE of Aromas, California · 16829 days ago · 5 km deep · 49 km away
  46. 2.027 km E of Tres Pinos, California · 16829 days ago · 4 km deep · 36 km away
  47. 1.615 km SSE of Livermore, California · 16829 days ago · 3 km deep · 71 km away
  48. 2.215 km SE of Livermore, California · 16829 days ago · 2 km deep · 71 km away
  49. 1.66 km SW of Gilroy, California · 16828 days ago · 7 km deep · 45 km away
  50. 2.316 km SE of Livermore, California · 16828 days ago · 2 km deep · 70 km away
  51. 2.124 km ENE of Soledad, California · 16828 days ago · 2 km deep · 66 km away
  52. 2.024 km ENE of Soledad, California · 16828 days ago · 3 km deep · 66 km away
  53. 1.66 km WSW of Gilroy, California · 16828 days ago · 3 km deep · 46 km away
  54. 1.69 km NE of Corralitos, California · 16827 days ago · 6 km deep · 53 km away
  55. 1.57 km NE of Milpitas, California · 16827 days ago · 0 km deep · 76 km away
  56. 1.915 km SE of Livermore, California · 16827 days ago · 2 km deep · 70 km away
  57. 1.615 km SE of Livermore, California · 16826 days ago · 2 km deep · 70 km away
  58. 1.7Northern California · 16826 days ago · 2 km deep · 70 km away
  59. 2.1Central California · 16826 days ago · 5 km deep · 31 km away
  60. 2.07 km SSE of Gilroy, California · 16826 days ago · 5 km deep · 39 km away

The first 60 of 146.

Before

  1. 3.114 km N of Morgan Hill, California · 16842 days ago · 6 km deep · 48 km away
  2. 1.83 km SSW of San Juan Bautista, California · 16842 days ago · 6 km deep · 47 km away
  3. 1.624 km NE of Greenfield, California · 16844 days ago · 6 km deep · 69 km away
  4. 1.98 km ENE of San Martin, California · 16845 days ago · 5 km deep · 34 km away
  5. 2.110 km E of Blackhawk, California · 16845 days ago · 9 km deep · 100 km away
  6. 2.115 km SE of Livermore, California · 16846 days ago · 3 km deep · 71 km away
  7. 2.315 km SE of Livermore, California · 16846 days ago · 3 km deep · 71 km away
  8. 1.61 km S of Los Altos Hills, California · 16846 days ago · 5 km deep · 93 km away
  9. 1.912 km E of Blackhawk, California · 16847 days ago · 10 km deep · 98 km away
  10. 1.611 km E of Blackhawk, California · 16847 days ago · 9 km deep · 100 km away
  11. 1.614 km NE of Morgan Hill, California · 16848 days ago · 4 km deep · 39 km away
  12. 1.911 km N of Livermore, California · 16848 days ago · 7 km deep · 94 km away
  13. 2.3Northern California · 16849 days ago · 9 km deep · 31 km away
  14. 1.825 km NE of Soledad, California · 16849 days ago · 11 km deep · 58 km away
  15. 1.622 km NE of Soledad, California · 16850 days ago · 4 km deep · 57 km away
  16. 1.523 km NE of King City, California · 16851 days ago · 6 km deep · 80 km away
  17. 1.87 km E of Gilroy, California · 16852 days ago · 4 km deep · 32 km away
  18. 1.716 km SSE of Tres Pinos, California · 16852 days ago · 5 km deep · 50 km away
  19. 1.615 km SSE of Tres Pinos, California · 16853 days ago · 5 km deep · 50 km away
  20. 1.615 km SSE of Tres Pinos, California · 16853 days ago · 5 km deep · 50 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1055184. Read Thu, Oct 1, 2026, 9:16 PM UTC.