Write down the angle (G) that the wave makes with the normal line. The normal is an imaginary line connecting the ground surface to the center of the earth. Write down the velocity (v1) of the wave as it travels from the ground surface to the first below-ground point. Write down the time (t1) that the wave takes to travel from the ground surface to the first below-ground point.
Convert t1 to the unit (e.g. seconds) in the denominator of v1.
Use a scientific calculator to evaluate v1*t1. The result is the length (B) of the path traveled by the wave from the ground surface to the first below-ground point.
Use a scientific calculator to evaluate Bcos(G). The result is the height of the wave.
Write down the underground velocity (v2) of the wave and the time (t2) it takes for the wave to travel from the first below-ground point to the second below-ground point.
Convert t2 to the unit (e.g. seconds) in the denominator of v2.
Use a scientific calculator to evaluate v2*t2. The result is the length (C) of the path traveled by the wave from the first below-ground point to the second below-ground point.
Use a scientific calculator to evaluate C + 2Bsin(G). The result is the total horizontal distance traveled by the wave.