Surface waves are special waves that result from the interaction of P and S waves with the Earth's surface.
(Surface waves; are; special waves that result from the interaction of P and S waves with the Earth's surface) (special waves; result; from the interaction of P and S waves with the Earth's surface)
Surface waves special waves
are result
special waves that result from the interaction of P and S waves with the Earth's surface
from the interaction of P and S waves with the Earth's surface