The documentation about the unit of cd (crack density) in the theory by "Hudson (1980, 1981) (hudson or crack) Cracks" in "MS_effective_medium" is not clear for me. Is it the density of cracks in the medium (the number of cracks per m^3)? I also cannot find information of the shape, size and direction of cracks and the characteristics of the medium.
The documentation about the unit of cd (crack density) in the theory by "Hudson (1980, 1981) (hudson or crack) Cracks" in "MS_effective_medium" is not clear for me. Is it the density of cracks in the medium (the number of cracks per m^3)? I also cannot find information of the shape, size and direction of cracks and the characteristics of the medium.