Also called seismic waves. They are caused by the rapid release of energy caused by movements in the Earth's crust.
A) Compression waves-
First and fastest waves produced in an earthquake. They are also called P (Primary) waves. They move in a jackhammer motion.
B) Shear waves-
Second waves to strike an area. Also called S (Secondary) waves. They travel slower than P waves. They move in an up and down roller coaster motion.
Lesson 4 continued
C) Surface waves-
These are the last waves to strike an area. They are the slowest waves and are confined to the surface of the Earth. They produce the most damage to man made materials. There are two kinds of surface waves; 1. Love waves and Rayleigh Waves.