Answer the following questions based on earthquakes.

Which are the different types of seismic waves?

Due to the plate movements and other causes in the interior of the earth, rocks experience displacement. Due to this, earth’s lithosphere experiences rigorous pressure. This led to the generation of the seismic waves. There are three different types of seismic waves such as – primary waves, secondary waves and surface waves. An instrument called seismograph is used to record seismic waves. To measures, the intensity of energy released at the time of an earthquake Richter scale is used.