Figure 14.2Earth’s core creates P-wave and S-wave shadow zones. The ray paths of the seismic waves from an earthquake focus through Earth’s interior are shown by solid lines (blue for P-waves, green for S-waves). The dashed lines show the progress of the waves at 2-minute intervals. Distances are measured in angular degrees from the earthquake focus. (a) The P wave shadow zone extends from 105° to 142°. (b) The larger S-wave shadow zone extends from 105° to 180°.