GEOLOGY

Detailed explanation-1: -These are the shake waves that move the ground up and down or from side to side. S waves are called secondary waves because they always arrive after P waves at seismic recording stations. Unlike P waves, S waves can travel only through solid materials.

Detailed explanation-2: -P waves can travel through liquid and solids and gases, while S waves only travel through solids.

Detailed explanation-3: -There are three basic types of seismic waves – P-waves, S-waves and surface waves.

Detailed explanation-4: -In P or compressional waves, the vibration of the rock is in the direction of propagation. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation.

Detailed explanation-5: -S-waves look like they are traveling perpendicular to the explosion or earthquake. Now, the bond strength in solids versus liquids and gasses explain why s-waves can only travel through solids.