GEOLOGY

Detailed explanation-1: -P waves travel fastest and are the first to arrive from the earthquake.

Detailed explanation-2: -P Waves. The first kind of body wave is the P wave or primary wave. It’s the fastest kind of seismic wave, and the first to arrive at a seismic station.

Detailed explanation-3: -Light wave – light wave is an electromagnetic wave which can travel in vacuum and all electromagnetic radiation travels at the same speed which is about 3×108m/sec through a vacuum. We call this the “speed of light"; Nothing can move faster than the speed of light.

Detailed explanation-4: -Primary waves, also known as P waves or pressure waves, are longitudinal compression waves similar to the motion of a slinky (SF Fig. 7.1 A). Secondary waves, or S waves, are slower than P waves.

Detailed explanation-5: -The P waves travel with the fastest velocity and are the first to arrive. To see a animations of spherical longitudinal waves check out: Sound Radiation from Simple Sources.