1. Body Waves: These waves travel through the Earth's interior.
* P-waves (Primary waves): These are compressional waves, meaning they cause particles to vibrate back and forth in the same direction as the wave travels. They are the fastest type of seismic waves and can travel through both solids and liquids.
* S-waves (Secondary waves): These are shear waves, meaning they cause particles to vibrate perpendicular to the direction of wave travel. They are slower than P-waves and can only travel through solids.
2. Surface Waves: These waves travel along the Earth's surface.
* Love waves: These waves are horizontal shear waves that travel along the surface of the Earth.
* Rayleigh waves: These waves are a combination of compressional and shear motions that create a rolling motion similar to ocean waves. They are the slowest type of seismic wave but are often the most damaging.
Therefore, when part of the Earth's crust breaks, both P-waves, S-waves, Love waves, and Rayleigh waves pass through the Earth. These waves are what seismologists use to study the Earth's interior and to locate earthquakes.
