Here's a breakdown:
* P-waves (Primary waves): These are compressional waves that travel through solids, liquids, and gases. They are the fastest seismic waves and arrive first at a seismograph.
* S-waves (Secondary waves): These are shear waves that travel only through solids. They are slower than P-waves and arrive second at a seismograph.
When these body waves reach the surface, they generate two types of surface waves:
* Love waves: These waves are horizontal shear waves that cause the ground to move back and forth perpendicular to the direction the wave is traveling. They are responsible for much of the shaking felt during an earthquake.
* Rayleigh waves: These waves are a combination of compressional and shear motions, resulting in a rolling, elliptical motion of the ground. They are the slowest seismic waves but can cause significant damage, especially to structures.
So, in essence, when P-waves and S-waves hit the surface, they transform into surface waves, which are responsible for the ground shaking we experience during earthquakes.
