Delta *
was defined as [1]:
where indicate elements in the elastic stiffness matrix. It was used to derive :
which is the most critical factor for Polar anisotropy[2]:
References
- ↑ Thomsen, Leon (1986). "Weak elastic anisotropy". GEOPHYSICS 51 (10): 1954–1966. doi:10.1190/1.1442051. PDF version.
- ↑ Thomsen, Leon (2002). Understanding Seismic Anisotropy in Exploration and Exploitation. Society of Exploration Geophysicists. doi:10.1190/1.9781560801986.