Nick Barton 
Rock Quality, Seismic Velocity, Attenuation and Anisotropy [EPUB ebook] 

Seismic measurements take many forms, and appear to have a universal role in the Earth Sciences. They are the means for most easily and economically interpreting what lies beneath the visible surface. There are huge economic rewards and losses to be made when interpreting the shallow crust or subsurface more, or less accurately, as the case may be.