GEOLOGY

Detailed explanation-1: -Body waves can travel through the Earth’s inner layers, but surface waves can only move along the surface of the planet like ripples on water. Earthquakes send out seismic energy as both body and surface waves.

Detailed explanation-2: -Two kinds of waves are generated by earthquakes and travel through solid rock: 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.

Detailed explanation-3: -There are three types of seismic waves: P and S body waves and surface waves. Body waves. Body waves radiate outward from the focus in all directions and travel through solid rock.

Detailed explanation-4: -P-waves (P stands for primary) are compressional earthquake waves that pass through the interior of the Earth.

Detailed explanation-5: -Refraction has an important affect on waves that travel through Earth. In general, the seismic velocity in Earth increases with depth (there are some important exceptions to this trend) and refraction of waves causes the path followed by body waves to curve upward.