Wash is a concept with remote origin in the Latin language that is used to name the matter melting or melting that expels a volcano during his eruption. When the lava is inside the Land is known as magma, while once expelled and solidified it receives the name of volcanic rock.
It can be said that lava, therefore, is a magma that rises through the earth’s crust and reaches the surface. The atmospheric pressure causes the lava to lose the gases it contained inside the Land. When it begins to travel the earth’s surface in the form of a stream, the lava has a temperature that oscillates between 700ºC and the 1,200ºC.
The viscosity of the lava is very high although, as it travels the surface, this magma expelled by the volcano loses its temperature and begins to solidify. The volcanic rocks or igneous that are generated with this solidification are usually used in the construction.
The usual thing is that lava is expelled from a volcano with great violence and that it travels long distances like a lit stream until it cools and solidifies. In just a few volcanoes around the world there are lava lakes, which are permanent formations of molten lava that are found in a crater or a depression.
Other concepts linked to eruptions and volcanic activity are the lava flow (the mantle of magma that a volcano emits during the eruption) and the lava tubes (tunnels that form inside a lava flow).
Volcanic eruptions cause a mixture of sensations in many human beings, especially in those who should not experience them closely and see how they destroy their houses. In those who have only seen them through documentaries, they can generate a strange combination of fascination and terror; and it is not for less, since the lava seems to have come out of a fantasy story, it is a magical element, a sea of fire.
Three most important eruptions in history
It took place in Alaska in 1912 and the name of the volcano can be translated as “new eruption.” In the two days that the eruption from Novarupta (from 6 to 8), the volume of magma expelled was around 13 cubic kilometers. It all ended when a 360-meter-wide lava dome clogged the magma conduit.
Between the islands of Sumatra and Java, in Indonesia, in the Sunda Strait, is Krakatoa, a Island volcanic. In 1883, between the months of June and August, large columns of ash and steam were expelled by its volcano, which had presented intense seismic activity in previous years.
The island was practically destroyed by the explosions that took place on August 27; its force and violence were such that the inhabitants of Perth and Rodriguez Island, 4,500 km and 4,800 km away respectively, heard them, and the barographs continued to record the pressure wave of the last explosion five days later.
Also in Indonesia is Mount Tambora, a stravolcano (conical in shape and with a considerable height, formed by several layers of hardened lava) that in 1812 starred in the most important eruption in recent history. Three years later, during which the volcano’s activity intensified, a smaller eruption took place along with detonations that were heard 1,400 km away.
The entire mountain was transformed into a fluid mass of lava, and pyroclastic flows descended towards the sea, without any mercy for the town.