Before you figure out what is the cause of the eruption of a volcano, it is necessary to understand that it represents.According to the terms of this process it is the active volcanic activity, which carries a great danger to any form of life due to the massive release of the surface of the ash, lava and incandescent debris.Eruption could last for two or three hours to several years.There are times when the magma cools down in the crater, from which it never leaves.Science is now allocated these types of volcanic eruptions, as the Hawaiian, Strombolian, vezuviansky and dome.
It's no secret that our planet is not a completely steadfast, and under the shell (known as the lithosphere), a thickness of about eighty kilometers, is a layer of the mantle.In it lies the main reason for the eruption of the volcano.The fact that the lithosphere is completely covered with faults.At the same time the mantle temperature of several thousand degrees.And when it is approaching the nucleus increases.Due to the temperature difference between the mass of hot lava moving upward and cool, conversely, lowered.
Now a few words about how the volcanic eruption.When hot, but cools the mantle lithosphere below the lower level, it is still some time moves underneath horizontally moving lithospheric plates.It should be noted that they can break away from the pieces.As soon as one plate to the other creeps, it is immersed in the lower mantle and begins to melt.Because the magma is much less weight compared with incandescent rocks, it gradually begins to rise up and build up in the so-called foci.Over time, the volume increases, and it is in search of freedom gradually takes a crack in the lithosphere.Sooner or later, the earth's crust in the weakest places of breaks, and the magma comes out.
reason volcanic eruption largely lies in the degassing of magma.The fact that it is located in the hearth under high pressure.In those places where the so-called terrestrial tube is relatively weak, there is an eruption.During this process, the magma loses gases.They are flammable, so the crater explode and catch fire.Sometimes magma finds no outlet on the Earth's surface.In this case, the volcano lava just flows.Sometimes it just gradually cools at depth.
Summing up, it should be noted that the main reason for the eruption of a volcano - a release of magma from the centers of the earth's surface as a result of movement of lithospheric plates and high pressure.If the new batch of hot substances are not available, the volcano can sleep indefinitely.If the pockets will be filled again, it will resume its activities.
Volcanic eruptions often lead to the death of people and animals, as well as considerable damage to buildings and structures.Lava with other red-hot substances flows down the mountain slopes and burning everything in its path.No matter how far gone in the development of mankind, the only escape from the eruption remains complete evacuation of the population.
