Question

why earthquakes are closely associated with volcanic belts

Answer 1

Hey mate

Here is ur answer

Most earthquakes are along the edges of the tectonic plates. This is where most volcanoes also occur. So most earthquakes are caused by the interaction of the plates not the movement of Magma.Thus earthquakes are closely associated with volcanic belts.

Answer 2

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 . once the plumbing system of the volcano is open and then magma flows through it, constant earthquake waves ,called harmonic tremor are recorded.
The distribution of earthquake provides information about magma pathways and the structure of volcanoes .