California earthquakes

M1.6 earthquake 6 km ENE of Aromas, California

A magnitude 1.6 earthquake struck 6 km ENE of Aromas, California on Mon, Jul 3, 1978, 3:22 PM PDT (22:22 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.1 9 km ESE of East Foothills, California. This one was a foreshock.

Aromas forecastMore in California

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), micro
Local time
UTC
1978-07-03 22:22:06 UTC
Depth
7.2 km (4.4 mi), shallow
Epicenter
36.919° N, 121.585° 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, 0.5 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
42°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 128 in the 60 days after this one and 60 in the 30 days before it.

After

  1. 2.221 km NE of Soledad, California · 17618 days ago · 2 km deep · 56 km away
  2. 1.712 km ESE of East Foothills, California · 17618 days ago · 4 km deep · 46 km away
  3. 2.115 km SSE of Tres Pinos, California · 17618 days ago · 3 km deep · 41 km away
  4. 1.66 km E of Big Sur, California · 17617 days ago · 12 km deep · 74 km away
  5. 3.010 km S of Tres Pinos, California · 17616 days ago · 3 km deep · 34 km away
  6. 3.010 km S of Tres Pinos, California · 17616 days ago · 3 km deep · 34 km away
  7. 3.07 km SSE of San Juan Bautista, California · 17615 days ago · 8 km deep · 16 km away
  8. 1.818 km SE of Big Sur, California · 17615 days ago · 12 km deep · 83 km away
  9. 3.08 km NW of Hollister, California · 17615 days ago · 7 km deep · 10 km away
  10. 1.58 km SW of Ridgemark, California · 17615 days ago · 7 km deep · 24 km away
  11. 2.44 km ESE of Aromas, California · 17614 days ago · 6 km deep · 6 km away
  12. 1.817 km E of East Foothills, California · 17612 days ago · 6 km deep · 49 km away
  13. 1.714 km E of Seven Trees, California · 17612 days ago · 2 km deep · 42 km away
  14. 2.43 km N of East Foothills, California · 17611 days ago · 0 km deep · 59 km away
  15. 2.94 km N of East Foothills, California · 17611 days ago · 1 km deep · 59 km away
  16. 1.74 km N of East Foothills, California · 17611 days ago · 1 km deep · 59 km away
  17. 2.011 km SE of Livermore, California · 17611 days ago · 3 km deep · 77 km away
  18. 1.511 km NE of East Foothills, California · 17610 days ago · 1 km deep · 60 km away
  19. 2.413 km SSE of Tres Pinos, California · 17609 days ago · 4 km deep · 38 km away
  20. 2.213 km SSE of Tres Pinos, California · 17609 days ago · 4 km deep · 39 km away
  21. 2.43 km SSW of San Juan Bautista, CA · 17608 days ago · 7 km deep · 11 km away
  22. 1.925 km SE of Tres Pinos, California · 17606 days ago · 15 km deep · 53 km away
  23. 2.02 km W of Cambrian Park, California · 17605 days ago · 7 km deep · 51 km away
  24. 2.65 km WSW of Gilroy, California · 17605 days ago · 6 km deep · 8 km away
  25. 1.92 km SSW of Cambrian Park, California · 17605 days ago · 5 km deep · 48 km away
  26. 1.611 km NW of Big Sur, California · 17604 days ago · 6 km deep · 71 km away
  27. 3.28 km NE of Interlaken, California · 17604 days ago · 5 km deep · 12 km away
  28. 1.711 km ESE of Seven Trees, California · 17603 days ago · 4 km deep · 40 km away
  29. 1.925 km ESE of Tres Pinos, California · 17602 days ago · 4 km deep · 52 km away
  30. 1.822 km NE of San Lucas, California · 17602 days ago · 7 km deep · 98 km away
  31. 2.413 km N of Morgan Hill, California · 17602 days ago · 5 km deep · 37 km away
  32. 1.622 km ENE of Soledad, California · 17601 days ago · 4 km deep · 63 km away
  33. 2.225 km NE of Soledad, California · 17601 days ago · 8 km deep · 55 km away
  34. 2.22 km SW of West Menlo Park, California · 17599 days ago · 6 km deep · 79 km away
  35. 1.75 km ESE of San Ramon, California · 17599 days ago · 7 km deep · 98 km away
  36. 2.08 km ENE of San Martin, California · 17596 days ago · 7 km deep · 23 km away
  37. 1.92 km W of Tres Pinos, California · 17595 days ago · 2 km deep · 26 km away
  38. 2.63 km NNE of Castro Valley, California · 17595 days ago · 10 km deep · 99 km away
  39. 3.03 km NNE of Castro Valley, California · 17595 days ago · 11 km deep · 99 km away
  40. 2.13 km NNE of Castro Valley, California · 17595 days ago · 10 km deep · 99 km away
  41. 2.09 km NNW of Hollister, California · 17595 days ago · 5 km deep · 14 km away
  42. 2.340 km SSW of South Dos Palos, California · 17595 days ago · 4 km deep · 71 km away
  43. 2.318 km SSE of Tres Pinos, California · 17594 days ago · 6 km deep · 44 km away
  44. 2.024 km NE of Greenfield, California · 17594 days ago · 4 km deep · 69 km away
  45. 2.03 km ESE of Tres Pinos, California · 17593 days ago · 9 km deep · 31 km away
  46. 1.621 km NE of Soledad, California · 17591 days ago · 7 km deep · 56 km away
  47. 2.025 km NE of Soledad, California · 17590 days ago · 12 km deep · 59 km away
  48. 1.72 km SW of Ridgemark, California · 17590 days ago · 7 km deep · 23 km away
  49. 1.818 km SSE of Tres Pinos, California · 17589 days ago · 7 km deep · 43 km away
  50. 1.926 km ESE of Tres Pinos, California · 17589 days ago · 0 km deep · 54 km away
  51. 1.632 km E of Tres Pinos, California · 17587 days ago · 1 km deep · 58 km away
  52. 1.65 km SSW of Gilroy, California · 17586 days ago · 6 km deep · 4 km away
  53. 1.512 km SE of Livermore, California · 17585 days ago · 4 km deep · 77 km away
  54. 2.330 km NE of Soledad, California · 17585 days ago · 6 km deep · 60 km away
  55. 2.023 km SSW of Volta, California · 17584 days ago · 5 km deep · 46 km away
  56. 1.824 km SE of Tres Pinos, California · 17584 days ago · 9 km deep · 51 km away
  57. 2.121 km NE of Soledad, California · 17583 days ago · 3 km deep · 55 km away
  58. 2.05 km SSE of Sunol, California · 17583 days ago · 8 km deep · 74 km away
  59. 1.624 km SE of Tres Pinos, California · 17582 days ago · 8 km deep · 51 km away
  60. 2.114 km SSE of Tres Pinos, California · 17582 days ago · 4 km deep · 39 km away

The first 60 of 128.

Before

  1. 3.210 km S of Tres Pinos, California · 17619 days ago · 4 km deep · 35 km away
  2. 1.89 km SSE of Davenport, California · 17619 days ago · 10 km deep · 49 km away
  3. 1.78 km NE of San Juan Bautista, California · 17620 days ago · 6 km deep · 10 km away
  4. 4.212 km S of Davenport, California · 17620 days ago · 11 km deep · 52 km away
  5. 2.512 km SSE of Davenport, California · 17620 days ago · 8 km deep · 51 km away
  6. 2.52 km NNW of Aromas, California · 17621 days ago · 10 km deep · 6 km away
  7. 2.110 km S of Tres Pinos, California · 17622 days ago · 3 km deep · 34 km away
  8. 2.210 km S of Tres Pinos, California · 17622 days ago · 4 km deep · 35 km away
  9. 2.022 km NE of Soledad, California · 17622 days ago · 2 km deep · 59 km away
  10. 2.322 km NE of Soledad, California · 17622 days ago · 3 km deep · 59 km away
  11. 2.621 km NE of Soledad, California · 17622 days ago · 5 km deep · 53 km away
  12. 1.68 km NW of Hollister, California · 17623 days ago · 6 km deep · 10 km away
  13. 1.723 km NE of King City, California · 17624 days ago · 4 km deep · 86 km away
  14. 2.312 km ESE of Gilroy, California · 17624 days ago · 4 km deep · 13 km away
  15. 1.514 km E of Seven Trees, California · 17624 days ago · 2 km deep · 42 km away
  16. 1.62 km SSE of Portola Valley, California · 17624 days ago · 9 km deep · 75 km away
  17. 1.74 km SSW of Gilroy, California · 17625 days ago · 4 km deep · 5 km away
  18. 2.511 km ESE of Gilroy, California · 17625 days ago · 5 km deep · 13 km away
  19. 3.111 km ESE of Gilroy, California · 17625 days ago · 5 km deep · 13 km away
  20. 1.624 km SE of Tres Pinos, California · 17626 days ago · 10 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040902. Read Mon, Sep 28, 2026, 11:56 AM UTC.