Seismic waves

There are two types of seismic waves:

• P-waves move quickly through solid crust and liquid core.
• S-waves only move slowly through the solid crust.

P-waves:

• They are longitudinal waves, which means the particles vibrate along the direction of motion of the wave.
• They travel faster than S-waves.
• They refact as density changes.

S-waves:

• They are…