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Causes and Effects of the Mt. Merapi Eruption

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Saniya Saraogi

on 19 June 2015

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Transcript of Causes and Effects of the Mt. Merapi Eruption

Causes and Effects of the Mt. Merapi Eruption
Effects
The Volcano and its eruption were caused by the Indo-Austraila Plate being Subducted beneath the Eurasian Plate. The Volcano Is located on a destructive plate margain at a subduction zone and is a part of the Pacific Ring Of Fire.
Word Meaning:
Subducted/Subduction: subduction
is the process by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge. Regions where this process occurs are known as
subduction
zones.
Effects (cont.)
Secondary (results from primary effcts)
Word Meanings for Effects:
Proclastic:a dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing at great speed.
- Saniya Saraogi 8c
Causes
Primary (caused directly by the volcano)

Volcanic bombs and hot gases of up o 800°c spread over 11km away
Ash fell up to 30km away and 5km into the sky. 15km away, villages were under 30cm of Ash
Sulphur Dioxide was blown across Indonesia and as far as South as Austrailia
Pyroclastic flows spread 3km down the mountain
Planes were grounded in western Austrailia because of the risk of damage to aircraft from the ash cloud
Ash,rock and lava deposited on the sides of the volcano is still bieng washed down into towns by rainfall creating lahar
Emergency shelters had to be moved over 15km away
Lahar: A mudflow that often flows along river valleys
Danger area extended to 20km from the mountain and 278,000 people living in this area had to flee their homes
Vegetable Prices increased as the vegetation had been destroyed
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