Which waves travel the deepest into the center of Earth?

P-waves, or primary waves, are the seismic waves that travel the deepest into the Earth's interior. They are compressional waves that can move through both solid and liquid materials, allowing them to penetrate the Earth's outer and inner cores. In contrast, S-waves, or secondary waves, cannot travel through liquids, limiting their reach to the solid regions of the Earth. Consequently, P-waves provide valuable insights into the structure and composition of the Earth's interior.