Natural disasters

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Presentation about Natural disasters. Made by Anar Iskenderov

Text of Natural disasters

  • 1. Natural disastersAnar Iskenderov 10-B

2. EARTHQUAKESEarthquakes occur when theearths tectonic plates releasestress. This release of pressurecreates the vibrations, which wecall an earthquake, causingdamage to the surroundingenvironment. They occur aroundfault lines, the places wheretectonic plates meet. The intensityof earthquakes is measured onthe Richter scale.EARTHQUAKES IN JAPAN. March 2011 3. TSUNAMIA tsunami is a series oftremendous wavesgenerated by a massiveunderwater disturbance.Tsunamis can move atspeeds as high as 500 milesper hour and althoughtypically small, they can beup to 100 feet tall. 4. HURRICANEA hurricane is a destructivetropical cyclone in the westernAtlantic Ocean with windsexceding 74 miles per hour.Hurricanes are usuallyaccompanied by electrical stormsand typically occur during summerand early autumn. In a mereday, a hurricane can release theamount of energy necessary tosatisfy the electrical needs of theentire United States for about sixmonths. 5. TORNADOA tornado is a destructivewhirling wind accompaniedby a funnel-shaped cloudextending down from acumulonumbus cloud.Tornadoes can spin atspeeds up to 500 miles perhour and annihilate anythingin its path in a matter ofseconds. 6. FLOODSA flood is caused by excesswater surpassing the limits ofits confines. A flood canhappen during a myriad ofevents, including heavy rainfalland overflowing river banks.Floods present a significantdanger with enough force tosweet away massive objectssuch as cars and trees. 7. TYPHOONA variation of tropical cyclone, which istypical for the northwestern Pacific. In thecentral part of typhoons observed thegreatest reduction of air pressure at thesea surface, reaching 650 mmHg 8. AVALANCHES Avalanches Happen on everycontinent Avalanche Season is during thewinter time or December-April inthe United States A large scale can release up to300,000 cubic yards of snow Avalanches are more commonlyreleased by recreationists than bynatural causes The biggest factor of avalanchepossibility is the accumulationsnow over the winter season More snow = biggeravalanche 9. THUNDER STORMS Every Thunderstormproduces lightning There is wet thunder anddry thunder, the differencebeing whether or not rain inproduced Warm humid conditionsfavor thunderstorms Only 10% of thunderstormsare classified as severe Your chance of being struckby lightning is 1 in 600,000 Multiple Lightning Strikes and aSupercell Thunderstorm formation 10. LANDSLIDES Landslides are the movementof land down a slope by gravity Landslides are mother naturesway of redistributing land They can be triggered byrain, floods, and earthquakesas well as man-made factorssuch as slope grading ormining Landslides have the potentialto happen anywhere a steepslope is present 11. THANKS FOR WATHCHING