Hurricanes

Hurricanes

1. Hurricanes

   • Definition : A hurricanes is huge storm it can be up t 600 miles across and have strong wings spiraling inwards at 75-200 mph
     • Facts : Each hurricane can last for over a week, moving 10-20 miles per hour
   • Loations :The Great Gavelston Hurricane hit the United States in the 1900 and caused between 8000 and 12000 deaths. There was so many deaths that horse carts had to transfer the dead. The hurricane was so big it was category 4 it started on August 27 1900 and ended September 17 1900. This Hurricane alone affected Atlantic Canada, Puerto Rico and 17 other areas
     • Location : Hurricane katrina was also one of the 5 deadliest hurricane to be recorded. With around 1800 deaths and a wind speed of 280 km/h the hurricane was category 5. It lasted 8 day and started on August 23 2005 and ended on August 31 2005. This hurricane affected 19 areas in total
   • Causes : Hurricanes gath heat and energy through contact with warm ocean waters. Evaporation from the sea water increases their power. Hurricanes rotate in a counter clockwise direction around an eye (center of the storm) the eye is the calmest part of the hurricane it only has light wind and fair weather. when they come onto land their heavy rain, strong winds and large waves can damage building trees and almost anything !
   • Effects : Death destruction on homes (leaving people vunerable and homeless) But it also destroy crops and vegeation. also with Hurricane come heavy rain and floods. Studies show that crime rate raises after hurricanes due to peoples desperation to survive . People can go week and months without their electricity also water can become polluted making it undrinkable

2. Volcanoes

   • Definition : A volcano is a opening in the earths crust that allows molten rock from beneath the crust to reach the surface (this molten rock is called magma) when it is beneath the surface and lava and when it erupts or flows from a volcano . Along with lava volcanoes also release gas, ash and rock
   • Facts : A volcano is formed by larva and ash , Volcanoes are usually cone shaped ( mountains or hills) ,When magma reaches the earths surface it is called larva and when the larva cools it is called rock , Volcanoe eruptions can only happen at constructive and destructive boundaries not at concervative boundaries and Volcanoes don't just occur on land infact they can happen in the ocean along the sea bed or ocean floor
   • Forms : Magma rises through the earths cracks or weaknesses in the earths crust . Pressure builds up inside the earth. When preassure is releases eg a result of a plate movement magma explodes to the earths surface causing a volcanic eruption the lava then cools forming a new crust . over time after several eruptions the rock builds up and forms a volcano
   • Location : Tambora On April the 10th 1815 Tambora produced the worlds largest volcano eruption known on the planet. This volcano erupted more than 50 cubic kilometers of magma and then collapsed afterwards to form a 6km wide and 1250 caldera
   • Effects : Volcanic eruptions can cause serious damage such as earthquakes, fast floods for eg. in the krakatoa island (volcanic island) one of the eruptions has a major tsunami after affect killing more than 36,000 people , mud slides and rock falls. larva can travel very far and destroy anything in it's way. the large amount of dust and ash can make it very hard to breath

3. Tsuanimi

   • Definition : A tsunami is a huge wave of usually an after affect of a volcanic eruption or a earthquake activity under the ocean, which can eventually crash on to the shoreline
   • When a earthquake , volcano or landslide happens on the ocean floor, water is displaced. This water forms the start of a tsuanami
   • Location : Boxing day tsunami 2004 On 26th of December 2004 a tsunami occured in the Indian ocean it was the result of the indio-australian plate subducting below eurasion plate it was caused by a earthquake measuring more magnitude 9. This tsunami travelled at speeds up to 800km per hour. sadly a quater of a million people died,Two million were left homeless people were swept away and 13 countries were affected especially Indonesia
   • Effects : Death, homeless, people swept away and injured, water was undrinkable, many company's had to rebuild their industries
   • Response : There was short tear aid and reacived water purification tablets temporary housing and medical supplies that were given by international countries

4. Earthquakes

   • Definition : A earthquake is the shaking and vibration of the earths crust due to movement of the earths tectonic plates . Earthquakes can happen along any plate boundary. earthquakes occur when tension is released from the earths crust
   • Causes : Earthquakes happen when built up tension is released inside the earths crust makeing the earths plates to move. Tectonic plates do not move smoothy against each other and occasionally get stuck this is when pressure builds up . When the pressure is eventually released an earthquake occurs
   • Effects : The affects of an earthquake can be devastating they can destroy ; buildings, houses, transport, communication, death, injuries, water might be contaminated, diseased may spread, people homeless, shops and businesses may be destroyed, landscapes destroyed, fires and tsunami