California earthquakes

M1.6 earthquake 26 km SSW of Tracy, California

A magnitude 1.6 earthquake struck 26 km SSW of Tracy, California on Tue, Sep 10, 1985, 4:09 AM PDT (11:09 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.6 7 km WNW of Broadmoor, 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
1.6 (md), micro
Local time
UTC
1985-09-10 11:09:42 UTC
Depth
-0.2 km (-0.1 mi), shallow
Epicenter
37.519° N, 121.539° 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, 6.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
79°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 87 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.67 km WNW of Broadmoor, California · 14987 days ago · 8 km deep · 92 km away
  2. 2.09 km NE of Gilroy, California · 14987 days ago · 8 km deep · 52 km away
  3. 1.82 km WSW of Taft Mosswood, California · 14986 days ago · 15 km deep · 48 km away
  4. 1.718 km SE of Tres Pinos, California · 14985 days ago · 9 km deep · 100 km away
  5. 2.218 km SE of Tres Pinos, California · 14985 days ago · 10 km deep · 100 km away
  6. 1.7Northern California · 14985 days ago · 7 km deep · 15 km away
  7. 1.9Northern California · 14985 days ago · 4 km deep · 24 km away
  8. 2.213 km N of Morgan Hill, California · 14985 days ago · 5 km deep · 31 km away
  9. 1.79 km NE of Gilroy, California · 14983 days ago · 8 km deep · 52 km away
  10. 2.08 km S of Davenport, California · 14982 days ago · 5 km deep · 88 km away
  11. 1.69 km NNW of Hollister, California · 14979 days ago · 5 km deep · 66 km away
  12. 1.69 km NNE of Morgan Hill, California · 14978 days ago · 4 km deep · 36 km away
  13. 1.620 km SSW of Pescadero, California · 14978 days ago · 2 km deep · 97 km away
  14. 1.59 km NNE of San Juan Bautista, California · 14977 days ago · 4 km deep · 67 km away
  15. 2.58 km NE of San Martin, California · 14977 days ago · 7 km deep · 43 km away
  16. 1.9Northern California · 14976 days ago · 3 km deep · 26 km away
  17. 1.65 km SSE of San Juan Bautista, California · 14976 days ago · 7 km deep · 80 km away
  18. 1.611 km SW of Brentwood, California · 14976 days ago · 11 km deep · 43 km away
  19. 1.56 km ENE of Hollister, California · 14975 days ago · 7 km deep · 73 km away
  20. 1.516 km NE of East Foothills, California · 14974 days ago · 8 km deep · 14 km away
  21. 3.516 km NE of East Foothills, California · 14974 days ago · 9 km deep · 14 km away
  22. 2.5Northern California · 14974 days ago · 8 km deep · 14 km away
  23. 1.611 km SW of Brentwood, California · 14974 days ago · 15 km deep · 42 km away
  24. 1.816 km NE of East Foothills, California · 14973 days ago · 8 km deep · 14 km away
  25. 1.82 km E of North Gate, California · 14973 days ago · 12 km deep · 58 km away
  26. 1.810 km ENE of Blackhawk, California · 14972 days ago · 11 km deep · 42 km away
  27. 2.310 km N of Hollister, California · 14972 days ago · 9 km deep · 65 km away
  28. 1.62 km E of Rodeo, California · 14970 days ago · 4 km deep · 84 km away
  29. 1.916 km E of Seven Trees, California · 14970 days ago · 6 km deep · 29 km away
  30. 1.616 km E of Seven Trees, California · 14970 days ago · 5 km deep · 29 km away
  31. 2.84 km NE of San Leandro, California · 14969 days ago · 11 km deep · 57 km away
  32. 1.76 km NE of East Foothills, California · 14969 days ago · 9 km deep · 23 km away
  33. 2.07 km NNE of Interlaken, California · 14968 days ago · 7 km deep · 58 km away
  34. 1.615 km N of Morgan Hill, California · 14968 days ago · 8 km deep · 29 km away
  35. 2.311 km SSE of Tres Pinos, California · 14968 days ago · 4 km deep · 95 km away
  36. 2.813 km N of Morgan Hill, California · 14967 days ago · 4 km deep · 31 km away
  37. 1.511 km SSW of Brentwood, California · 14966 days ago · 12 km deep · 41 km away
  38. 2.38 km NE of San Juan Bautista, California · 14965 days ago · 5 km deep · 69 km away
  39. 1.68 km NE of San Martin, California · 14964 days ago · 6 km deep · 43 km away
  40. 1.716 km NE of East Foothills, California · 14963 days ago · 8 km deep · 14 km away
  41. 3.07 km N of Interlaken, California · 14962 days ago · 8 km deep · 58 km away
  42. 1.68 km NNE of Interlaken, California · 14962 days ago · 8 km deep · 57 km away
  43. 2.12 km SSW of San Juan Bautista, California · 14961 days ago · 6 km deep · 77 km away
  44. 2.312 km N of Morgan Hill, California · 14961 days ago · 3 km deep · 32 km away
  45. 1.712 km WSW of Byron, California · 14960 days ago · 10 km deep · 37 km away
  46. 3.013 km N of Morgan Hill, California · 14960 days ago · 5 km deep · 31 km away
  47. 1.911 km SSE of Tres Pinos, California · 14960 days ago · 4 km deep · 95 km away
  48. 1.914 km SSE of Tres Pinos, California · 14960 days ago · 7 km deep · 98 km away
  49. 2.89 km NE of Gilroy, California · 14960 days ago · 9 km deep · 52 km away
  50. 1.83 km N of Ashland, California · 14959 days ago · 4 km deep · 56 km away
  51. 2.216 km NE of East Foothills, California · 14958 days ago · 8 km deep · 13 km away
  52. 1.88 km ENE of Morgan Hill, California · 14957 days ago · 2 km deep · 40 km away
  53. 1.77 km NNE of San Martin, California · 14956 days ago · 4 km deep · 42 km away
  54. 1.615 km WNW of Davenport, California · 14956 days ago · 6 km deep · 88 km away
  55. 1.80 km WSW of Concord, California · 14955 days ago · 19 km deep · 67 km away
  56. 1.516 km E of Seven Trees, California · 14953 days ago · 6 km deep · 29 km away
  57. 1.73 km N of Piedmont, California · 14952 days ago · 12 km deep · 72 km away
  58. 1.88 km ENE of Morgan Hill, California · 14950 days ago · 1 km deep · 40 km away
  59. 1.814 km E of Seven Trees, California · 14948 days ago · 3 km deep · 28 km away
  60. 1.812 km ESE of Gilroy, California · 14948 days ago · 5 km deep · 62 km away

The first 60 of 87.

Before

  1. 3.29 km NNW of Hollister, California · 14988 days ago · 3 km deep · 66 km away
  2. 1.89 km ESE of Seven Trees, California · 14989 days ago · 5 km deep · 36 km away
  3. 1.513 km SSE of Livermore, California · 14990 days ago · 6 km deep · 15 km away
  4. 1.86 km ENE of Hollister, California · 14990 days ago · 8 km deep · 73 km away
  5. 2.37 km S of Sunol, California · 14990 days ago · 7 km deep · 31 km away
  6. 2.27 km S of Sunol, California · 14990 days ago · 6 km deep · 32 km away
  7. 2.87 km ESE of East Foothills, California · 14990 days ago · 7 km deep · 24 km away
  8. 2.67 km ESE of East Foothills, California · 14990 days ago · 7 km deep · 24 km away
  9. 3.07 km E of East Foothills, California · 14990 days ago · 7 km deep · 24 km away
  10. 1.64 km NE of San Leandro, California · 14991 days ago · 11 km deep · 57 km away
  11. 1.915 km N of Morgan Hill, California · 14992 days ago · 6 km deep · 30 km away
  12. 1.910 km ESE of East Foothills, California · 14993 days ago · 7 km deep · 25 km away
  13. 1.64 km NE of San Leandro, California · 14993 days ago · 10 km deep · 57 km away
  14. 2.122 km SW of Volta, California · 14993 days ago · 1 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc54855. Read Wed, Sep 23, 2026, 2:37 AM UTC.