A clear and friendly educational science illustration showing how seismic P-waves and S-waves travel from an earthquake focus through the Earth, with a cutaway Earth diagram on the left and two labeled wave-motion panels on the right: P-waves as compressions and rarefactions along a spring-like coil, S-waves as up-and-down shearing motion. Bright cheerful palette of teal, orange and cream, clean flat vector style, large readable short labels P wave and S wave, simple arrows showing motion direction, uncluttered layout suitable for a classroom poster, scientifically accurate wave behavior, no long paragraphs of text, no watermark.