earthquake waves travel through the earths crust.
P waves or primary waves.
Earthquake generated waves are called seismic waves. These are waves of energy that travel through the Earth's layers. Their velocity depends on the elasticity and density of the medium that they travel through.
P-waves.
Seismic Waves.
Since an earthquake or seismic wave is a pressure or force wave (like sound waves), it requires a material in which to propagate. So, no earthquake waves can travel through a vacuum.
These are known as seismic waves.
Seismic waves are any waves that travel through the Earth. As such all earthquake waves are seismic waves, however not all seismic waves are caused by earthquakes.
Earthquakes can only happen in solids. Earthquake waves are a different matter:p-waves can travel through both solids and liquidss-waves can only travel through solidssurface waves (e,g, Rayleigh waves, Love waves) can only travel on the surface of solidsetc.
by their boundaries
Earthquake P-waves don't travel in straight lines, they travel in like a circle after the earthquake has struck. These P-waves arrive first during an earthquake.
The mantle of course.....because sound waves travel through liquid like surfaces better than solid rock.
Earthquake waves travel in all directions.