Analyse the factors that cause variations in the problems caused by volcanoes around the world Article

п»їAnalyse the elements that trigger differences in the hazards brought on by volcanoes around the world (40 marks) A threat is defined as something which has the probability of kill or perhaps cause damage. However a hazard is only a risk to people if they happen to be exposed to it. This is when a hazard can cause disasters. For example , a volcano is only a hazard in the event the population touches the consequences of its activity. Hazards and the likeliness for being disasters can depend on a number of factors, such as how produced a country exposed to the hazard is, how big the population uncovered or the size and size of the tragedy. Volcanoes are a particularly numerous risk to humans because they have many linked hazards, nevertheless the risk they will pose varies around the world. One factor that heavily affects how hazardous a volcano is, is the plate border that it is situated on. Subductive plate restrictions tend to produce much more violent eruptions than conservative or constructive margins. Subductive boundaries occur where two china (one continental and a single oceanic) happen to be moving toward each other. The denser menu, the oceanic, is required underneath the continental. As it subducts into the asthenosphere, it starts to turn back in to magma. This magma is usually light and fewer dense compared to the asthenosphere, therefore it rises and forces it is way through weaknesses in the crust. This is one way volcanoes will be formed in subductive margins. An example, is the Aleutian Island destinations which are a series of volcanoes formed by the subduction with the pacific oceanic plate underneath the Eurasian/north American (? ) plate. Volcanoes formed on these restrictions tend to be more unsafe because they erupt even more violently. It is because the melted oceanic menu (which offers the magma) can be rich in silica. This creates magma with a very high viscosity meaning it moves incredibly slowly and cools extremely rapidly (from about 800 degrees). The sort of volcano this produces are likely to be acid solution dome volcanoes because when the...

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