A nautral process: volcano erruption

A volcano is founded where tectonic plates are moving. Volcanic
eruption are not frequent, but they can be devastating.

I go explain you how effusive eruption happened.

The first step is the ascent of magma from Magma chamber through magma conduit
because of the increase of pressure on the magma chamber due to the moves of tectonic plates.
In the next stage, magma arrives to the lava lake at the top of volcano.
 From there lava starts flowing over the volcano face. This last step can be dangerous
for the human installation. It finishes with the cooling of magma and its solidification.
This last step mostly takes place in the ocean.

So this very impressive process illustrates the immense power of nature.