Japan Tsunami

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Tsunami Formation

  • How is a tsunami formed?

rapid movement of the ocean floor displaces a column of water

series of waves travel outwards

as the wave approaches land, its energy is compressed into a smaller space - forcing it to gain height

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Japanese Tsunami - Fact File

  • When?

March 11th 2011 at 14:46

  • Where?

North coast of Tokyo - affected a 200 miles stretch - Minamisanriku was the nearest settlement

Focus: 32km underwater

Epicentre: 70km east of Oshika Peninsula

  • Magnitude?

9.0 on the Richter Scale

  • Tsunami?

Yes, waves up to 38.9m travelling 10km inland

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Japanese Tsunami - Effects

  • 5,000 people injured & over 15,000 deaths
  • 8,500 poeple missing & 300,000 refugees
  • 100,000 children separeted from families - school day
  • 125,000 building damaged or destroyed - 4,700 destroyed houses & 50,000 damaged houses
  • 4 million households in NE Japan left without electricity and 1.5 million without water
  • severe structural damage - roads, railways, fires, dam collapse washing away 1,800 homes
  • 15 ports in disaster area - all reopened by 29th March 2011
  • airport closed
  • 25 million tons of rubble and debris
  • soil liquification - 30 homes and 1,000 other buildings damaged
  • tsunami simply washed over some of the 12m high walls that surround 40% of Japan;s coasts
  • at least 100 tsunami evacuation points were hit
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Effects on Nuclear Industry

  • several nuclear power stations shut down automatically
  • 3 suffered esplosions
  • residents within 20km of Fukishima 1 and 10km of Fukishima 2 were evacuated
  • US Governmnet recommended everyone within 80km to be evacuated
  • oil refineries shut down
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Responses to the Tsunami

Japanese Red Cross:

  • providing first aid and emergency heath care
  • distrinuting relief items
  • 85 medical teams deployed (inc. 735 staff members)
  • 65,000 blankets distributed
  • 1,400 entried on website to help find family members
  • cost about $300 billion - possibly the most expensive natural disaster on record
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