Statistical simulation results for P-wave (a) velocity and (b) attenuation in vertical and horizontal directions when the fractures angles in Zone 1 are approximately 45|$^\circ $|⁠, 70|$^\circ $| and 80|$^\circ $|⁠. The three models displayed in Figs 18(d)–(f) represent one model from each of the three scenarios, with each scenario consisting of 10 models.