this wave is called a tsunami and can destroy a whole city/town.
secondary :D
The surface wave.
Longitudinal wave
Gravity, At any instant time the restoring force is the component of gravity acting parallel to the direction of the motion.
Each material has a different density so the inherent speed that light will travel through it will change as well. Just like you have a harder time walking in water because its denser than air, the speed of light changes when going from air to water as well.
what is the causes of blue revolution
surface waves
That would be a P-wave or Primary wave which is a longitudinal seismic wave.
A sudden release of energy, through an earthquake, or by man-made sources(Vibroseis, dynamite etc.) causes a seismic wave which travels through the medium.
i believe it is the primary wave (p-wave)
Seismic wave
Transverse wave, i believe
things that can cause seismic waves are earthquackes
i really don't know
Release of energy causes the seismic wave which make the ground shake.
A secondary wave causes rocks to vibrate at 90 degrees. This earthquake wave can travel through solids but not through liquids, and causes rock particles to vibrate at right angles to the direction of wave travel.
The surface wave.
Destructive plate boundary.