Case Study: Mount Merapi

Hey, here is a case study on Mount Merapi for those people taking geography. I hope this helps you to revise! Please rate and comment on how to improve :D

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  • Created on: 08-04-10 19:18
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Mt Merapi
Background Information
There are 130 volcanoes in Indonesia, including one
third of the world's most active volcanoes. Indonesia is
made up of 13000 small islands and is on a destructive
plate margin. Mount Merapi ("mountain of Fire") is part
of the ring of fire, is the most active volcano in
Indonesia and is located on the island of Java. It has
been erupting frequently since 1548. This mountain is
considered sacred and since 1920 has killed people 10
times. 300 days a year, you can actually see smoke
emerging from the volcano! In 1994, a large explosion
of hot gas killed 43 people! There was another large
eruption in 2006. People still choose to live in villages
1700 metres above sea level, right on the flanks of the
volcano.
Causes
1994 eruption:
The Eurasian Plate (continental crust) forces the Indian Plate (oceanic crust)
downwards. This means it is at a destructive plate margin with a subduction zone. The
India Plate is melted in the subduction zone due to the friction caused by the two
plates rubbing together. The magma from the mantle rises between the two plates,
forming a volcano. The diagram below explains this in more clarity:

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Long Term Effects
More than 60 people were killed during the 1994 eruption. This is a large amount of
deaths from a volcano. 6km away, the village Turgo was affected the most.
Short Term Effects
The eruption was very violent and very sudden. Before anyone could escape, a thick
cloud of red hot ash covered the entire area. This prevented people from seeing
where they were going. People's houses were burnt down and any flesh exposed was
also burnt.…read more

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Management techniques
Down each valley, a dam has been built to stop mudflows from reaching the villages.
The mud is trapped and then used on farmlands to release water. There are 70 dams
altogether. They protect villages, roads, a big canal system and tourists sites. Also,
local people have been trained to help people who are seriously injured. These will
hopefully reduce the amounts of deaths in the future.…read more

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