Animation on the characteristics of the 3 types of seismic waves (P, S and L) detected by a seismograph: speed, regions of the globe crossed , types of movements of the ground and damage caused on surface.
Click on to launch the sequece.
To illustrate seismic waves propagation and their corresponding speed.
On the surface, earthquakes produce various destructive effects. A seismograph placed at one point on the surface records the successive traces of the quake as a function of the type of vibration…