Download tsunami

Learning Objectives:
1) To understand what a tsunami is and why it is a secondary effect of an
earthquake
2) To know the causes, effects and responses of a specific tsunami
http://www.bbc.c
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e/clips/the-asiantsunami-effectsontourism/3201.ht
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Give me 10
words….
http://www.bbc.co.uk
/news/world-asia20150778
Tsunamis in
the news!
http://www.bbc.co.uk/learnin
gzone/clips/the-asiantsunami-variableimpacts/3202.html
Tsunami- a special type of wave where the entire depth of the sea or ocean is
set in motion by an event, often an earthquake, which displaces the water above
it and creates a huge wave.
The crust shifting is the primary effect, a knock-on (secondary) effect of this is
the displacement of water above the moving crust.
Formation of tsunamis and Boxing day tsunami- Bitesize information
http://www.bbc.co.uk/schools/gcsebitesize/geography/natural
_hazards/tsunamis_rev1.shtml
How earthquakes can trigger tsunamis
http://www.bbc.co.uk/news/science-environment-12739417
Tsunami characteristics
A normal, wind-driven wave may have a length of 100m from crest to crest, but
a tsunami may be 200km in length. The heights also greatly differ: 2m for a
normal wave versus 1m for a tsunami out at sea. Tsunamis move at different
speeds of around 800kph, rapidly approaching the coast almost unnoticed. As
they near land they slow, reduce in length and gain in height.
An earthquake caused The Indian Ocean tsunami on 26th December 2004.
It was the result of the Indo- Australian plate subducting beneath the Eurasian
plate. There was an earthquake measuring 9.1 on the Richter scale. The IndoAustralian plate cracked and moved very quickly, causing a lot of water to be
displaced, triggering a tsunami with waves up to 30m high.
How do tsunamis form?
The Boxing day earthquake/ tsunami
http://www.bbc.co.uk/science/earth/natural_disasters/tsunami#p00hs2py
http://www.bbc.co.uk/science/earth/natural_disasters/tsunami#p00hs2ql
Tsunami destruction
http://www.bbc.co.uk/science/earth/natural_disasters/tsunami#p00hs2sq
Short-term responses
3) Relief teams were swamped by the
scale of the disaster and many injured
were not treated for days. Bodies littered
the streets before being buried in mass
graves.
4) Tents and temporary shelters were
erected to provide shelter for the
homeless.
5) Medical aid stations were set up to
treat the injured and prevent disease from
the contaminated water. Fresh water and
water purification tablets were introduced.
6) Heavy equipment was brought to the
area to clear roads destroyed by the force
of the water.
Long-term responses
5) £372 million by the British public is being used to
build new and stronger housing for the people
affected.
6) Rebuilding the fishing industry and coastal resorts
for the tourist industry.
Causes and effects of the Asian Tsunami
http://www.bbc.co.uk/learningzone/clips/the-asian-tsunami-causes-and-effects/3195.html
The Asian tsunami- disease
http://www.bbc.co.uk/learningzone/clips/the-asian-tsunami-disease/3197.html
Predicting a future tsunami event
http://www.bbc.co.uk/learningzone/clips/the-asian-tsunami-predicting-afuture-event/3203.html