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Volcanoes are like giant safety valves that release the pressure that builds up inside the Earth. The Hawaii islands were formed by 5 volcanoes.
Classified by the extent of their activity volcanoes are of four types. There are about known active volcanoes on Earth, not counting those that lie beneath the sea. A volcanic eruption occurs when hot rocks and lava burst from a volcano; and geysers and springs are actually just volcanoes that throw boiling water high in the air.
They are caused by volcanic heat warming trapped ground water. The most dangerous volcanic eruption recorded is the eruption of Mount St. The tallest volcano in the world is the Ojos del Salado, a volcano in Chile.
Volcanoes are generally concentrated on the edge of continents, along the island chain, or beneath the sea forming long mountain ranges. The destruction they leave in their wake accounts for the total annihilation of the surrounding landscape.
Around 2, 00, people have lost their lives to volcanic eruptions in the past five hundred years. Buildings are destroyed, people are rendered homeless, people are killed, plant and animal life are both destroyed and the poisonous gases that emanate from the volcanoes can cause death and diseases like pneumonia in the people who survive it.
However not everything associated with the volcanoes is negative. The crust of the earth exists due to the large volumes of magma that did not erupt but instead cooled below the surface. It results in rich soil which is good for cultivation.
The volcanic ash that blows out of the volcano increases soil fertility by adding nutrients to the soil. Ground water heated by magma can be tapped for geothermal energy. Most of the metallic minerals like copper, gold, silver, lead and zinc are mined from the magmas found deep within the roots of extinct volcanoes.
With the increasing studies done by scientists on volcanoes it is becoming possible to gauge the activity level of a volcano. With this information although it might not be possible to prevent the erupting of a volcano at least the massive destruction of lives can be avoided by getting people evacuated in time.Some key variables of volcano tourism are its volcanic resources, volcanic tourism resources, volcanic ecology, and volcanic culture.
Thus volcanic tourism in the context of a holistic approach involves a wide spectrum of factors and issues. Trees and vegetation are covered with volcanic ash in the Karo district of Indonesia's Sumatra island, on November 5, , after the eruption of Mount Sinabung volcano.
Volcanic eruptions can produce a wide range of hazards. Although phenomena such as pyroclastic flows and surges, sector collapses, lahars and ballistic blocks are the most destructive and dangerous, volcanic ash is by far the most widely distributed eruption product.
6b. risk of volcanic eruption (lahar) 7. Death Toll from Earthquake; 7.
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Volcanoes have the capacity to produce widespread destruction by covering cities and towns with ash and lava. However, volcanic eruptions also create islands, and the minerals in volcanic ash stimulate plant growth.
Volcanoes affect human populations in many ways. Some volcanic effects are. - Volcanic mud flows caused by the ash erupting from a volcano mixing with river water - worst cases are when there is high rainfall/snowmelt as eruption occurs - can occur days, weeks or years after eruption - ash layers are 'reworked' by heavy rain.