Fig. 10

Numerical simulation for the Ps amplitude reflected at the megasplay fault containing different aspect ratios of cracks. a The absolute amplitudes of Ps reflection in the synthetic TDWs for the 6 OBSs, yellow: OBS01, black: OBS02, light-blue: OBS03, orange: OBS04, red: OBS05, and magenta: OBS06. The inset displays the synthetic TDW waveforms at OBS04, where large amplitudes were obtained at low aspect ratio. b Sketches and circled insets show connected/less-connected fractures and their associated crack geometry at high tide/low tide (macroscopic view), respectively. Arrows of “fluid in” and “fluid out” indicate fluid migration from R shears