California earthquakes

M1.6 earthquake 6 km ENE of Sunol, California

A magnitude 1.6 earthquake struck 6 km ENE of Sunol, California on Fri, Jul 27, 1984, 9:21 PM PDT (04:21 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.8 6 km NNE of Interlaken, California. This one was a foreshock.

Sunol 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-07-28 04:21:07 UTC
Depth
0.2 km (0.1 mi), shallow
Epicenter
37.607° N, 121.822° 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, 0.7 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
89°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 142 in the 60 days after this one and 103 in the 30 days before it.

After

  1. 2.02 km ENE of Aromas, California · 15404 days ago · 34 km deep · 81 km away
  2. 2.34 km S of Fairview, California · 15404 days ago · 3 km deep · 20 km away
  3. 3.214 km N of Morgan Hill, California · 15404 days ago · 7 km deep · 42 km away
  4. 3.514 km N of Morgan Hill, California · 15403 days ago · 7 km deep · 41 km away
  5. 2.015 km N of Morgan Hill, California · 15403 days ago · 6 km deep · 41 km away
  6. 1.916 km N of Morgan Hill, California · 15403 days ago · 5 km deep · 40 km away
  7. 1.616 km N of Morgan Hill, California · 15403 days ago · 5 km deep · 40 km away
  8. 2.816 km E of Seven Trees, California · 15403 days ago · 6 km deep · 40 km away
  9. 2.414 km E of Seven Trees, California · 15403 days ago · 3 km deep · 38 km away
  10. 2.016 km E of Seven Trees, California · 15403 days ago · 4 km deep · 40 km away
  11. 2.21 km S of American Canyon, California · 15402 days ago · 0 km deep · 73 km away
  12. 2.18 km ENE of Morgan Hill, California · 15402 days ago · 3 km deep · 55 km away
  13. 3.214 km N of Morgan Hill, California · 15402 days ago · 4 km deep · 42 km away
  14. 3.57 km E of East Foothills, California · 15402 days ago · 8 km deep · 26 km away
  15. 2.614 km N of Morgan Hill, California · 15401 days ago · 7 km deep · 41 km away
  16. 1.715 km E of Seven Trees, California · 15401 days ago · 5 km deep · 38 km away
  17. 2.116 km N of Morgan Hill, California · 15401 days ago · 5 km deep · 40 km away
  18. 2.06 km NNE of Morgan Hill, California · 15401 days ago · 4 km deep · 50 km away
  19. 2.08 km ENE of San Martin, California · 15400 days ago · 6 km deep · 60 km away
  20. 2.07 km E of East Foothills, California · 15400 days ago · 8 km deep · 26 km away
  21. 1.62 km SW of Lexington Hills, California · 15400 days ago · 12 km deep · 53 km away
  22. 1.615 km N of Morgan Hill, California · 15399 days ago · 5 km deep · 40 km away
  23. 1.614 km E of Seven Trees, California · 15398 days ago · 8 km deep · 35 km away
  24. 2.44 km W of Hollister, California · 15398 days ago · 0 km deep · 90 km away
  25. 2.52 km NE of Pacheco, California · 15397 days ago · 9 km deep · 48 km away
  26. 2.02 km SSW of San Juan Bautista, California · 15397 days ago · 5 km deep · 90 km away
  27. 1.811 km E of Seven Trees, California · 15397 days ago · 7 km deep · 37 km away
  28. 3.86 km NNE of Interlaken, California · 15396 days ago · 11 km deep · 67 km away
  29. 1.97 km NNE of Interlaken, California · 15396 days ago · 10 km deep · 66 km away
  30. 1.67 km NNE of Interlaken, California · 15396 days ago · 10 km deep · 66 km away
  31. 2.17 km NNE of Interlaken, California · 15396 days ago · 10 km deep · 67 km away
  32. 1.714 km E of Seven Trees, California · 15396 days ago · 6 km deep · 35 km away
  33. 1.87 km NNE of Interlaken, California · 15396 days ago · 11 km deep · 67 km away
  34. 1.616 km E of Seven Trees, California · 15396 days ago · 5 km deep · 37 km away
  35. 1.77 km ENE of Sunol, California · 15395 days ago · 0 km deep · 1 km away
  36. 1.914 km E of Seven Trees, California · 15394 days ago · 1 km deep · 37 km away
  37. 2.36 km E of East Foothills, California · 15394 days ago · 6 km deep · 26 km away
  38. 2.311 km ESE of East Foothills, California · 15393 days ago · 6 km deep · 31 km away
  39. 3.015 km E of Seven Trees, California · 15393 days ago · 8 km deep · 38 km away
  40. 1.822 km NE of East Foothills, California · 15392 days ago · 3 km deep · 20 km away
  41. 1.6Northern California · 15391 days ago · 4 km deep · 55 km away
  42. 2.013 km N of Morgan Hill, California · 15391 days ago · 4 km deep · 43 km away
  43. 1.712 km N of Morgan Hill, California · 15391 days ago · 4 km deep · 44 km away
  44. 2.612 km ESE of East Foothills, California · 15391 days ago · 6 km deep · 33 km away
  45. 2.013 km ESE of East Foothills, California · 15391 days ago · 6 km deep · 33 km away
  46. 2.112 km NE of San Martin, California · 15391 days ago · 4 km deep · 55 km away
  47. 1.58 km ENE of Morgan Hill, California · 15391 days ago · 3 km deep · 53 km away
  48. 1.814 km N of Morgan Hill, California · 15391 days ago · 5 km deep · 42 km away
  49. 1.915 km N of Morgan Hill, California · 15391 days ago · 4 km deep · 40 km away
  50. 1.819 km ENE of East Foothills, California · 15390 days ago · 6 km deep · 25 km away
  51. 2.219 km ENE of East Foothills, California · 15390 days ago · 6 km deep · 25 km away
  52. 3.716 km N of Morgan Hill, California · 15389 days ago · 9 km deep · 39 km away
  53. 2.08 km NNE of East Foothills, California · 15388 days ago · 6 km deep · 17 km away
  54. 2.819 km ENE of East Foothills, California · 15388 days ago · 6 km deep · 25 km away
  55. 3.013 km ESE of Alum Rock, California · 15387 days ago · 7 km deep · 35 km away
  56. 1.816 km E of Seven Trees, California · 15386 days ago · 8 km deep · 39 km away
  57. 1.817 km WNW of Diablo Grande, California · 15386 days ago · 5 km deep · 36 km away
  58. 1.714 km E of Seven Trees, California · 15386 days ago · 1 km deep · 37 km away
  59. 1.814 km E of Seven Trees, California · 15386 days ago · 5 km deep · 36 km away
  60. 2.20 km WNW of Hollister, California · 15386 days ago · 8 km deep · 91 km away

The first 60 of 142.

Before

  1. 2.213 km N of Morgan Hill, California · 15406 days ago · 4 km deep · 43 km away
  2. 1.913 km N of Morgan Hill, California · 15406 days ago · 6 km deep · 43 km away
  3. 1.61 km E of Aromas, California · 15408 days ago · 8 km deep · 82 km away
  4. 2.02 km NE of Daly City, California · 15410 days ago · 0 km deep · 56 km away
  5. 2.38 km ESE of East Foothills, California · 15410 days ago · 7 km deep · 29 km away
  6. 2.37 km ENE of Sunol, California · 15410 days ago · 2 km deep · 1 km away
  7. 1.613 km ESE of East Foothills, California · 15410 days ago · 8 km deep · 34 km away
  8. 1.98 km NE of Morgan Hill, California · 15410 days ago · 3 km deep · 50 km away
  9. 2.214 km N of Morgan Hill, California · 15410 days ago · 3 km deep · 41 km away
  10. 2.114 km N of Morgan Hill, California · 15411 days ago · 3 km deep · 41 km away
  11. 1.616 km E of Seven Trees, California · 15411 days ago · 9 km deep · 38 km away
  12. 2.112 km ESE of East Foothills, California · 15413 days ago · 6 km deep · 33 km away
  13. 1.78 km ENE of San Martin, California · 15413 days ago · 4 km deep · 61 km away
  14. 1.911 km N of Morgan Hill, California · 15413 days ago · 6 km deep · 45 km away
  15. 1.712 km NNE of Morgan Hill, California · 15414 days ago · 4 km deep · 44 km away
  16. 1.98 km NE of Morgan Hill, California · 15414 days ago · 3 km deep · 52 km away
  17. 1.81 km WNW of Concord, California · 15415 days ago · 14 km deep · 46 km away
  18. 1.613 km N of Morgan Hill, California · 15415 days ago · 3 km deep · 43 km away
  19. 1.69 km E of San Martin, California · 15415 days ago · 8 km deep · 63 km away
  20. 1.78 km S of Livermore, California · 15415 days ago · 3 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc24263. Read Thu, Oct 1, 2026, 8:29 AM UTC.