mass movement (landslide) case study: izu oshima landslide october 2013 japan

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Global issues environmental earth hazards
Case study: Izu-Oshima, Japan-landslide October 2013
Volcanic island 100km south of Tokyo, Japan with a population of 8,500
Consisted of multiple landslide events, which caused the failure of the
entire hillside. Due to high rainfall of 824mm in total (122mm peak in 1
hour) which was due to typhoon Whipa.
Presence of soils formed from volcanic ash which is highly unstable and
poses a high risk of liquefaction.
Temporary blackouts in wide spread areas
27 people have died and around 50 are missing
283 homes destroyed along with vital services such as hospitals and schools
Businesses destroyed by debris meaning a lack of employment for survivors
Hundreds of police officers, fire fighters and troops searched areas where
houses were buried.
Evacuation shelters set up for 8000 people to shelter from typhoon.
People airlifted afterwards to prevent further deaths from another
approaching storm
Several people taken to hospital
Concentration is now on evacuating residents rather than searching for
survivors that are buried under debris as the surfaces are still very unsafe
and there is a risk of more landslides due to more typhoons on the way.
Voluntary evacuation of 990 people


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