Question

Which are the main reasons for the volcanic eruption?​

Answer 1

Answer:

A volcanic eruption is when lava and gas are released from a volcano—sometimes explosively. The most dangerous type of eruption is called a 'glowing avalanche' which is when freshly erupted magma flows down the sides of a volcano.

Although there are several factors triggering a volcanic eruption, three predominate:

1. the buoyancy of the magma,

2. the pressure from the exsolved gases in the magma and

3. the injection of a new batch of magma into an already filled magma chamber.

Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts. Melting may happen where tectonic plates are pulling apart or where one plate is pushed down under another. If magma is thick, gas bubbles cannot easily escape and pressure builds up as the magma rises.