The number of classes of earthquakes based on magnitude of Ritcher scale are ______

The type of earthquake very rare in occurrence is ______

What is the location of maximum damage caused due to an earthquake?

Which of the following need not be avoided for construction of quake resistant buildings?

The plate movements at boundaries are ______

The point of origin of an earthquake below the earth’s surface is called ______

What are the surface waves called as?

Type of L-wave in which the particle is of a complex nature is ______