Investigation of fabric evolution using bidirectional shear wave velocity measurements Kazem Fakharian, Farzad Kaviani Hamedani, Iman Parandian and Morteza Jabbarpour Aghdam E3S Web Conf., 92 (2019) 03008 Published online: 25 June 2019 DOI: 10.1051/e3sconf/20199203008