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118581
why is a tsunami hazardous?
Description
Geography (Restless Earth) Mind Map on why is a tsunami hazardous?, created by chelseahope on 01/06/2013.
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geography
restless earth
geography
restless earth
Mind Map by
chelseahope
, updated more than 1 year ago
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Created by
chelseahope
about 11 years ago
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Resource summary
why is a tsunami hazardous?
triggered by earthquakes
crust shifting is the primary effect
displacement of water is the secondary effect
tsunamis are much larger and faster while rapidly approaching the coast
as they near land they slow down and reduce in length while getting taller
tohoku tsunami in japan
2011
9.0 on richter scale
30 minutes
40m high
9 more waves
up to 10m tall
2004
9.3 on richter scale
25m high
destructive plate margin
effects
20,000 deaths
destroyed tsunami defences
500km squared of coastal planes were destroyed
ruined farmlands
ruptured gas lines - fires
no electricity
explosions in fukishima nuclear power plant
responses
100,000 soldiers - search and rescue
exclusion zone
long term
rebuilding
roads/railways
new tsunami defences
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