Seismic Waves
Which are vibrations caused by earthquakes.
Primary Waves
The fastest seismic Wave are called Primary, Waves, or P Waves.
Secondary Waves
Secondary Waves are the second Seismic Waves to Arrive at any Particular Location after an Earthquake, though they start at the same time as Primary Waves.
Surface Waves
Surface waves are Seismic Waves that move along Earth's Surface , not through its interior.