Volcanoes (Montserat & Mount Saint Helens)

1265 words - 5 pages

VolcanoesUsing volcanic eruptions you have studied, explain to what extent causes, effects and responses differ in MEDCs and LEDCs.Mount Saint Helens & Mount Merapi4 and a half billion years have given us a world full of extraordinary landscapes. Earth is a dynamic and restless planet on which continents move and collide, creating volcanoes. Even though volcanoes are the most fundamental force on the planet, they destroy lots and lots of lives and ruin entire landscapes. In this essay I will be discussing two volcanoes; one in and MEDC; Mount Saint Helens and the other is and LEDC; Mount Merapi.LocationThe volcano Mount Saint Helens is in Washington, in the North West USA. It is located in the Cascade mountain range. Mount Saint Helens is known for its massive eruption on may the 18th in 1980 at 8.30 AM. A 5.1 magnitude earthquake triggered the eruption. Before 1980, the volcano did not erupt for 130 years. ["Mt St Helens Case Study."]Developmental level of countryThe GDP per capita of the United stated is 49,965 in US dollars and the income is very high. Back in 1980 when the Mount saint Helens erupted, the GDP was 12,180 dollars. In 2012 the GDP in Indonesia was 3,557 dollars, which was 2947 in 2010 when the eruption occurred. ["GDP per Capita (current US$)."]Types of industry in areaThe area around Mount saint Helens was a national park, which was used for tourism, forestry, salmon farming and some agriculture. A successful timber industry was situated near Mount saint Helens. The area around Mount Merapi was and is still being mainly used for agriculture by local farmers. Whilst there are hardly any people who live near Mount saint Helens, there are quite some villages close to mount Merapi because of the fertile soil.Type of plate marginMount saint Helens is part of the pacific ring of fire. The volcano is situated on a subduction zone; on a destructive plate margin where an oceanic plate; the Juan de Fuca plate is being sub ducted under a continental plate; the North American plate. As the Juan de Fuca plate descends under the North American plate, it melts into hot magma. The liquid rock rises through the gaps of the continental plate and forms the volcano. ["Mt St Helens Case Study."]Type of volcanoMount saint Helens can be classified as an active strato-volcano, also known as a composite volcano. Mount Merapi is also an active strato volcano that has an active summit lava dome.Types of volcanic hazardsIn 1980 mount saint Helens erupted from the top but because the top was partly blocked by old solidified lava, the volcano erupted from the side too. So it there was both the lateral blast and vertical eruption. The blast removed the 396 meters of the summit of the volcano. When Mount saint Helens erupted there was a pyroclastic flow; gas, steam and ash burst out and flowed down the side of the volcano. It moved at 300 km per hour. The heat of the volcano melted the snow on the mountains which created lahars. The huge mudflows ran down...

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