SEISMIC WAVES

• Seismic waves cause the earth's crust to move.
• Seismic waves - the vibrations in the earth and the basis of scientist in studying the earth's interior.
• 2 types of seismic waves: Body waves and Surface waves.
• Subtypes of seismic waves: P-wave, S-wave, Love wave, Rayleigh wave
• Body wave - can move through the inner layers of earth
• Body waves arrive before the surface waves
• Body waves have higher frequency than surface waves
• Body waves have higher probability to cause destruction
• Surface wave - can only move through the surface of the earth or only in the crust.
• Surface waves have lower frequency than body waves
• Surface waves are responsible to the destruction associated with earthquake.
• 2 types of body waves: Primary waves and secondary waves
• Primary waves (P-waves) - also known as longitudinal waves, compressional waves, push-pull waves, or pressure waves
• Secondary waves (S-waves) - also known as transverse waves, shear waves, or distortional waves
• Primary waves (P waves) - Fastest seismic waves and it arrive first in the seismic station.
• Primary waves (P waves) - It travels through all media including solids, liquids, and gases.
• P waves push and pull the rock it moves through like soundwaves' push and pull
• P waves movement is back and forth
• Secondary waves can only travel through solid rocks.
• The movement of S waves is Up and Down or side to side perpendicular to the direction of waves.
• 2 types of surface waves: Love waves and Rayleigh waves.
• Love wave is named after A.E.H Love (British Mathematician) on 1991
• Rayleigh wave is named after John William Strutt, Lord Rayleigh (English Physicist) on 1885
• Love waves are faster than Rayleigh waves
• Love wave moves ground side to side and produce horizontal motion.
• Rayleigh wave moves ground up and down, side to side of same direction of the waves.
• Most of the shaking felt from earthquake is the Rayleigh waves