Before revision: Principle of seismic velocity structure Main article: Seismic wave The study of seismic velocity structure, using the principles of seismic wave propagation, offers critical insights into the Earth's internal structure, material composition, and physical states.
After revision: Principle of seismic velocity structure The study of seismic velocity structure, using the principles of seismic wave propagation, offers critical insights into the Earth's internal structure, material composition, and physical states.