The forces which originate from within the Earth

The earthquake tremors are recorded by an instrument called ____________.

The forces which originate on the surface of the Earth

The point on the Earth's surface which is vertically above the focus is called ___________.

The Richter scale ranges from

The intensity of earthquake is measured on the

On the basis of the frequency of eruption volcanoes are classified into

The earthquake scientists are called

The word volcano is derived from the name of an island

A circular opening on the Earth's surface is called