Determination of near surface geophyscial properties by impulsive displacement events
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United States of America Patent
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Jan 19, 2016
Grant Date -
Oct 31, 2013
app pub date -
Apr 30, 2013
filing date -
Apr 30, 2012
priority date (Note) -
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Abstract
The invention is an improved technique for measuring near surface attributes of the ground while conducting a seismic survey. The improved technique is enabled by an electric vibe using a number of linear electric motors that direct a rod or piston to contact the ground in a recurring fashion. By applying constant force on the rods of the linear electric motors against the ground, the penetration into the ground may be measured for both rate and overall deformation. This information provides an accurate indication of viscosity and stiffness. In addition shear velocity and compression velocity may be measured and in some conditions, even the type of prominent shear wave may be identified for the area.
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