California earthquakes

M1.8 earthquake 4 km SE of Tracy, California

A magnitude 1.8 earthquake struck 4 km SE of Tracy, California on Wed, Jun 1, 1983, 11:09 AM PDT (18:09 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M3.8 3 km N of Ashland, California. This one was a foreshock.

Tracy 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-06-01 18:09:14 UTC
Depth
12.2 km (7.6 mi), shallow
Epicenter
37.704° N, 121.395° 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 3.6 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
257°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 32 in the 30 days before it.

After

  1. 3.05 km NE of Fairview, California · 15829 days ago · 9 km deep · 53 km away
  2. 3.83 km N of Ashland, California · 15827 days ago · 5 km deep · 63 km away
  3. 1.89 km E of San Martin, California · 15827 days ago · 9 km deep · 69 km away
  4. 2.33 km N of Ashland, California · 15827 days ago · 5 km deep · 63 km away
  5. 3.51 km ENE of Pittsburg, California · 15826 days ago · 17 km deep · 56 km away
  6. 1.56 km ENE of East Foothills, California · 15825 days ago · 6 km deep · 45 km away
  7. 1.83 km N of Ashland, California · 15825 days ago · 5 km deep · 64 km away
  8. 1.9Northern California · 15824 days ago · 3 km deep · 65 km away
  9. 2.39 km N of Pittsburg, California · 15822 days ago · 20 km deep · 62 km away
  10. 3.112 km N of Pittsburg, California · 15822 days ago · 17 km deep · 63 km away
  11. 2.114 km N of Morgan Hill, California · 15821 days ago · 3 km deep · 54 km away
  12. 1.820 km NW of Diablo Grande, California · 15821 days ago · 2 km deep · 19 km away
  13. 1.78 km E of San Martin, California · 15820 days ago · 0 km deep · 68 km away
  14. 2.45 km NE of Morgan Hill, California · 15819 days ago · 4 km deep · 63 km away
  15. 1.96 km SSE of Gilroy, California · 15817 days ago · 5 km deep · 85 km away
  16. 1.710 km SE of Sunol, California · 15817 days ago · 5 km deep · 39 km away
  17. 1.89 km ENE of Morgan Hill, California · 15817 days ago · 6 km deep · 62 km away
  18. 2.56 km SW of Moraga, California · 15816 days ago · 6 km deep · 69 km away
  19. 1.921 km NE of East Foothills, California · 15816 days ago · 5 km deep · 30 km away
  20. 2.12 km WSW of Stevinson, California · 15815 days ago · 0 km deep · 63 km away
  21. 1.911 km ESE of East Foothills, California · 15815 days ago · 6 km deep · 49 km away
  22. 1.86 km ENE of Sunol, California · 15815 days ago · 13 km deep · 39 km away
  23. 1.6Northern California · 15815 days ago · 2 km deep · 28 km away
  24. 2.016 km SE of Livermore, CA · 15815 days ago · 2 km deep · 28 km away
  25. 2.011 km ENE of Morgan Hill, California · 15815 days ago · 4 km deep · 60 km away
  26. 2.02 km NW of Camanche Village, California · 15814 days ago · 1 km deep · 73 km away
  27. 2.416 km NE of East Foothills, California · 15813 days ago · 6 km deep · 36 km away
  28. 1.61 km W of Pleasant Hill, California · 15813 days ago · 12 km deep · 65 km away
  29. 1.79 km N of East Foothills, California · 15812 days ago · 6 km deep · 45 km away
  30. 2.44 km W of San Juan Bautista, California · 15811 days ago · 9 km deep · 97 km away
  31. 1.92 km NE of Pacheco, California · 15811 days ago · 15 km deep · 66 km away
  32. 2.40 km WSW of Rollingwood, California · 15810 days ago · 5 km deep · 87 km away
  33. 1.65 km WSW of Gilroy, California · 15809 days ago · 2 km deep · 83 km away
  34. 1.621 km E of East Foothills, California · 15809 days ago · 7 km deep · 36 km away
  35. 2.17 km ENE of Hollister, California · 15808 days ago · 8 km deep · 93 km away
  36. 1.95 km NNE of Pleasanton, California · 15808 days ago · 13 km deep · 40 km away
  37. 2.05 km NNE of Pleasanton, California · 15808 days ago · 14 km deep · 40 km away
  38. 1.75 km NE of Pleasanton, California · 15808 days ago · 13 km deep · 39 km away
  39. 2.65 km NNE of Pleasanton, California · 15808 days ago · 14 km deep · 40 km away
  40. 2.05 km NNE of Pleasanton, California · 15808 days ago · 13 km deep · 40 km away
  41. 1.65 km NNE of Pleasanton, California · 15808 days ago · 13 km deep · 39 km away
  42. 2.76 km NNE of Pleasanton, California · 15808 days ago · 15 km deep · 40 km away
  43. 1.55 km NNE of Pleasanton, California · 15808 days ago · 12 km deep · 40 km away
  44. 1.76 km S of Green Valley, California · 15808 days ago · 7 km deep · 86 km away
  45. 2.19 km E of San Martin, California · 15807 days ago · 4 km deep · 68 km away
  46. 1.79 km ESE of East Foothills, California · 15807 days ago · 9 km deep · 48 km away
  47. 2.19 km ESE of East Foothills, California · 15807 days ago · 8 km deep · 48 km away
  48. 3.47 km WSW of Gilroy, California · 15806 days ago · 5 km deep · 83 km away
  49. 1.77 km WSW of Gilroy, California · 15806 days ago · 4 km deep · 83 km away
  50. 1.520 km E of East Foothills, California · 15806 days ago · 6 km deep · 39 km away
  51. 2.36 km WSW of Gilroy, California · 15806 days ago · 4 km deep · 83 km away
  52. 2.46 km WSW of Gilroy, California · 15806 days ago · 4 km deep · 83 km away
  53. 1.81 km E of Waldon, California · 15803 days ago · 9 km deep · 62 km away
  54. 2.07 km ENE of Seven Trees, California · 15802 days ago · 8 km deep · 54 km away
  55. 1.69 km NE of Gilroy, California · 15802 days ago · 4 km deep · 72 km away
  56. 1.94 km NNE of Pittsburg, California · 15801 days ago · 15 km deep · 57 km away
  57. 1.56 km E of Fremont, California · 15800 days ago · 5 km deep · 49 km away
  58. 2.08 km ESE of East Foothills, California · 15800 days ago · 3 km deep · 49 km away
  59. 2.26 km NE of East Foothills, California · 15800 days ago · 5 km deep · 45 km away
  60. 2.022 km W of Diablo Grande, California · 15800 days ago · 6 km deep · 32 km away

The first 60 of 98.

Before

  1. 1.80 km WSW of Castro Valley, California · 15831 days ago · 3 km deep · 61 km away
  2. 2.06 km ESE of East Foothills, California · 15832 days ago · 2 km deep · 49 km away
  3. 1.810 km E of Blackhawk, California · 15835 days ago · 14 km deep · 38 km away
  4. 1.811 km NNW of Boulder Creek, California · 15836 days ago · 7 km deep · 86 km away
  5. 1.91 km W of American Canyon, California · 15837 days ago · 4 km deep · 93 km away
  6. 1.64 km E of Seven Trees, California · 15838 days ago · 3 km deep · 57 km away
  7. 2.42 km N of Kensington, California · 15841 days ago · 10 km deep · 82 km away
  8. 1.68 km ENE of San Martin, California · 15841 days ago · 5 km deep · 67 km away
  9. 1.86 km SE of Alum Rock, California · 15843 days ago · 8 km deep · 54 km away
  10. 1.61 km SSE of Drytown, California · 15843 days ago · 0 km deep · 94 km away
  11. 3.66 km SE of Alum Rock, California · 15843 days ago · 8 km deep · 54 km away
  12. 1.67 km SE of Alum Rock, California · 15843 days ago · 8 km deep · 54 km away
  13. 2.17 km NE of Hollister, California · 15843 days ago · 6 km deep · 90 km away
  14. 2.310 km ESE of East Foothills, California · 15845 days ago · 8 km deep · 49 km away
  15. 1.66 km W of Drytown, California · 15845 days ago · 0 km deep · 91 km away
  16. 1.64 km SSW of Clayton, California · 15848 days ago · 11 km deep · 53 km away
  17. 2.13 km W of Orinda, California · 15848 days ago · 14 km deep · 75 km away
  18. 1.79 km NNW of Hollister, California · 15849 days ago · 4 km deep · 86 km away
  19. 1.63 km NNW of Hollister, California · 15850 days ago · 6 km deep · 91 km away
  20. 2.36 km N of El Nido, California · 15852 days ago · 12 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1095922. Read Sat, Oct 3, 2026, 6:55 AM UTC.