Abstract: For transverse isotropic fast formations. the evaluation method of the least horizontal principal stress by using logging data is an important unresolved issue. An innovative method is proposed to solve this problem by derivation of five independent stiffness coefficients (C11. C33. https://www.diegojavierfares.com/limited-time-Vans-Bail-Shoulder-Bag-Black-Ripstop-great-pick/