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Tectonic hazard event in an LEDC
Asian Tsunami, Indian Ocean, Indonesia
Earthquake occurred at 7:58 local time on 26th
Was a magnitude 9.1 on the Richter scale
The epicentre was 100km off the coast of
The focus depth was about 20km
Indonesia, Thailand, Sri Lanka, The Maldives and The Andaman Islands were the
countries that were worst affected.
As the waves came in, it sucked the beach dry, so people went to collect fish and
have a look; the water then came in very fast.
In some areas where the beach was very gently sloping, the sea rolled on top of
itself, so the wave doubled in height.
In a week there were reported to have been about 84 aftershocks
Indonesia is position on the Eurasian plate and Indo-Australian plate boundary which
is a destructive plate boundary.
The 1300km of the Indo-Australian plate was subducted and the Eurasian plate
moved up by 2m. All the water on top of it had to be displaced, causing a large wave.
As the wave moved east and west it become bigger and faster, hitting Sumatra in
just 15 minutes.
Caused a raging torrent of water which carried lots of debris including cars and
houses. It would have been impossible to survive once in the water.
Widespread destruction of the coastlines including infrastructure and gas and power
230,000 people died in 14 countries
Over 500,00 people were injured
Nearly 5million people were made homeless, or had no access to food or clean water
Body's rotting in the hot tropical climate led to diseases such as cholera, diphtheria
and Hepatitis A and B to be spread in the dirty water.
The sea water and sewage contaminated wells that villagers relied on for water; this
also increased the spread of disease and diarrhoea which killed many children.
The standing water increased mosquito numbers and therefore malaria risks
$14 billion was donated in aid from all over the world
Humanitarian aid reduced the death toll from hunger and disease by helping
The World Food Programme provided food for more than 1.3 million people
The British public donated nearly $300 million alone
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Mass graves were dug by aid workers to reduce the spread of disease through
Many NGO's such as Oxfam and The Red Cross rushed to help victims by providing
Lots of fishermen were away when the tsunami occurred so lots of local women and
children died and the fishermen came home to broken families. This created a huge
society problem.…read more