Christoph Helo (Christoph Helo), graduate geologist from the University of McGill (McGill University), Canada, found that deep-sea volcanoes explode more often than previously thought, according to a university news release. Up to 80% of the volcanic activity on Earth occurs on the ocean floor. However, previously it was thought that most of the deep-sea volcanoes spewing magma and a volcanic dust, but not explosive.
Using ion microscope Christoph Helo analyzed the level of CO2 in droplets of magma and volcanic ash from the Axial Volcano (Axial Volcano) in an underwater ridge Juan de Fuca (Juan de Fuca Ridge), located off the coast of Oregon, USA. These fragments to reconstruct the state of the magma prior to eruption. CO2 levels have been very high. Thus it was possible to show that in the deep volcanoes possible explosive eruption. In addition, it became clear that deep volcanoes emit into the atmosphere is much more CO2 than thought.
As told "Around the World", the deepest in the world of underwater volcanic fault is Cayman Trench in the Caribbean. On the bottom, at a depth of five thousand meters, are hydrothermal vents — so-called black smokers. Black smokers are the habitat of unusual biological communities that receive energy from the decomposition of compounds of hydrothermal fluids. The temperature in the black smokers up to 300-350 ° C and the pressure — 250-300 atmospheres.
And Italy is waiting for the eruption of an underwater volcano Marsili. Eruption may be due to the collapse of the walls of the volcano, scientists believe they are too fragile. According to the structure volcano solid, and the amount of lava in it is rather large. Eruption will inevitably powerful tsunami that flooded the southern part of the country — the campaign, Calabria and Sicily.
Marsili volcano is located 90 km south-west of Naples. The height of the volcano is 3 million meters, the length is 70 km, width — 30 km. Crater of Mars is at a depth of 450 m from the surface of Tyrrhenian Sea. No information on the eruptions of Mars in previous centuries there.