Question

Question 11 (iii)

State whether the following statements are True/False.
Tremors on the earth can also be caused by the eruption of a volcano.

Answer 1

True. Most earthquakes directly beneath a volcano are caused by the movement of magma. The magma exerts pressure on the rocks until it cracks the rock. Then the magma squirts into the crack and starts building pressure again. Every time the rock cracks it makes a small earthquake. These earthquakes are usually too weak to be felt but can be detected and recorded by sensitive instruments.