Seismic Waves 5
Seismic Waves 5 : Vibrations passing through the ground that result from an earthquake. They are of three principal types: (1) Primary or P-waves: Compression-dilation ("push-and-pull") waves that move through the Earth very quickly. (2) Secondary or S-waves: Transverse or shear ("shake") waves that move through the Earth more slowly. (3) Long or L-waves: Surface waves confined to the crust of the Earth. They travel more slowly than the P and S waves and may not be detected far from the epicentre
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