is reflected at a subsurface reflector and reflected back to the receiver as p wave in the p s reflection the imparted p wave seismic energy is converted into s wave energy and reflected back to the receiver as polarized s wave in alternate embodiments any data that will occur to those of ordinary skill in the art is used in a further embodiment mathematically after migration and zero offset mapping processing the travel time of the detected p wave and p s converted wave is represented in the following equations see fig4 ue89e and eq ue89e 1 t p ue89e ue89e s z v p z v s eq ue89e 2 where vp is the p wave velocity and vs is the s wave velocity respectively z is the depth of horizon and t pp and t ps are the two way travel time for p p and p s reflections respectively in an even further embodiment the two way travel time of pure s wave travel time is also calculated by t ss 2 ue89e z v s eq ue89e 3 in an even further embodiment the relationships among t ps t pp and t ss are defined by t pp 2 ue89e g 1 g ue89e t p ue89e ue89e s eq ue89e 4 t ss 2 1 g ue89e t p ue89e ue89e s eq ue89e 5 where g.