What Is The Process A Volcano Goes Through Before An Eruption?

The earth consists of extremely hot mantle under its apple skin thin crust. This super heated mantle remains solid due to the intense planetary pressure. In certain instances which are rare, extremely hot mantle forms in the lower mantle area and liquefies the upper mantle into super heated magma. This magma starts pushing outwards towards the crust, forming a plume 500 to 1000 km wide. This is a hot spot formed under the crust. Because the melted magma has a lower density than the surrounding rocks, it gets pushed upwards by the pressure of the mantle below. If the pressure is great enough, the magma bursts through the crust in an eruption.

Volcanoes are not formed in a particular way; in fact there are four possible reasons why a volcano occurs. The lithosphere is a layer of the earth comprising of the upper mantle and crust is divided into tectonic plates. These plates keep shifting. When these plates diverge from one another, collide with one another or move in opposite vertical directions, volcanoes can erupt. The hot mantle below the crust melts and flows out from these gaps.

The surrounding environment of the volcano may go through an area of high acidity in water, CO2 being released from surrounding lakes, rivers,etc. The volcano it self may start to bulge due to the pressure being built up. No. And size of quakes may also increase.

Of magma and other volcanic ejecta are within a short time from the crater to the surface release. As the magma contains a large number of volatile, combined with the confining pressure of overlying rock layers so that these volatile dissolved in the magma can not overflow, when magma rose close to the surface, the pressure decreases, volatile matter is released rapidly, so the formation of volcanic eruptions. Volcanic eruption is an unusual geological phenomenon is a manifestation of crustal movements, but also the Earth's internal heat on the surface of one of the most intense display.

Well in simple,magma is heated inside the mantle,earths core, and then is pushed up and outside of the volcano

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