How does earth solid inner core effect seismic waves?

The Earth's solid inner core significantly affects seismic waves by changing their speed and behavior as they pass through different layers of the Earth. Primary waves (P-waves), which are compressional, can travel through both solid and liquid, while secondary waves (S-waves), which are shear waves, cannot pass through the liquid outer core. As seismic waves encounter the boundary between the outer core and the inner core, they are refracted and reflected, providing valuable information about the Earth's internal structure and composition. This behavior helps seismologists understand the characteristics of the Earth's layers and the dynamics of seismic events.