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Natural DisastersAre we prepared?

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What is a Natural Disaster?Whats the difference between natural disaster and natural hazard?Can we predict them?What can we do to prevent disaster?Are we in danger?

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List of top 11 natural disastersLandslides and MudflowsFloodThunderstormTsunamiVolcanic EruptionDroughtHurricaneTornadoWildfireEarthquakeAvalanche

Landslides and mudflows

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LandslidesLandslides are the movement of land down a slope by gravityLandslides are mother natures way of redistributing landThey can be triggered by rain, floods, and earthquakes as well as man-made factors such as slope grading or miningLandslides have the potential to happen anywhere a steep slope is present

LandslidesA landslide or a landslip is a movement in the ground and a shallow flow of debris.The largest landslide in history happened because of Mount St. Helens. 3km of rock moved downhill.

DroughtsA drought is a long period of time in which a certain region receives a shortage of waterLasting three years from 1958 to 1961, the Great Chinese Famine is the worst on record, 15 to 43 million were killed as a resultUSA has been hit by a huge drought in 2012 decreasing corn income by 12%

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Thunderstorm

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Thunder StormsEvery Thunderstorm produces lightningThere is wet thunder and dry thunder, the difference being whether or not rain in producedWarm humid conditions favor thunderstormsOnly 10% of thunderstorms are classified as severeYour chance of being struck by lightning is 1 in 600,000

Multiple Lightning Strikes and a Supercell Thunderstorm formation

Tsunami

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TsunamisTsunami means harbor wave and is caused by the displacement of a large body of water normally an ocean or a large lake.

TsunamisThe biggest tsunami ever happened at Lituya Bay, Alaska on July 9, 1958. The megatsunami was around 150 meters tall. The tsunami caused by 2004 Indian Ocean earthquake, is the 6th deadliest Natural disaster in recorded history with a death toll of 230,210 280,000.

Volcanic Eruption

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Volcanic EruptionA volcano is an opening in a planets surface which allows hot magma to escape from below the surface. Study of volcanos is called Volcanology and volcanic eruptions are measured using Volcanic Explosivity Index

Volcanic EruptionThe biggest volcanic eruption was Mount Tamboraon April 10, 1815, it heard over 2000 km away and had a death toll of around 71,000. Due to the explosion 1816 became known as The Year Without Summer.The largest volcano known to humans is Olympus Mons on Mars. Olympus Mons means Mount Olympus and is bigger than Mount Everest.

Blizzard

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Drought

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DroughtsA drought is a long period of time in which a certain region receives a shortage of waterLasting three years from 1958 to 1961, the Great Chinese Famine is the worst on record, 15 to 43 million were killed as a resultUSA has been hit by a huge drought in 2012 decreasing corn income by 12%

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Hailstorm

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Heat Wave

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Hurricane

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HurricanesA hurricane is a tropical storm with winds over 74mphHurricanes occupy the most intense level of the three levels of tropical stormsHurricanes rotate or circulate counter-clockwise in the northern hemisphereHurricanes can only occur over the Atlantic ocean, Caribbean sea, and gulf of Mexico

View of a Hurricane from Space

Tornado

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Tornados (Twisters)A tornado is a violently rotating column of air that is touching both the ground and a cumulonimbus cloud.Tornado conditions are caused when different temperatures and humidity meet to form thunder clouds Twisters can attain speeds up to 100 miles an hour

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TornadosThe biggest tornado recorded was the Hallam, Nebraska tornado on May 22, 2004. It was around 2.5 miles big and had a death toll of around 160.The deadliest tornado recorded occurred in Daultipur and Salturia, Bangladesh on April 26th, 1989. 1300 recorded dead and 12,000 injured.

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TornadosAtornado is defined as a violently rotating column of air extending from a thunderstorm to the ground Tornados are found in almost every part of the worldTornados are most common in the United States, just east of the Rocky Mountains in an area called Tornado AllyWaterspouts are weak tornados over water and can move inland and become tornados

Click on Image to View a Tornado Chasers Video

Wildfire

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WildfireA wildfire is any uncontrolled fire in the countryside or wilderness.Other names for a wildfire are brush fire, bushfire, forest fire, desert fire, grass fire, hill fire, peat fire, vegetation fire, and veldfire.One of the largest wildfire is the 1910 wildfire

Earthquake

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EarthquakesEarthquakes are caused by the release of built up pressure caused by the shifting of tectonic platesEarthquakes usually occur on fault lines, or areas where tectonic plates meetThe size of an earthquake is measured using the logarithmic based Richter scale

An aerial view of the San Andreas fault in the Carrizo Plain, Central California

Earthquake

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Before an Earthquake

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During an earthquake

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After an Earthquake

Check

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Avalanche

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AvalanchesAvalanches Happen on every continentAvalanche Season is during the winter time or December-April in the United StatesA large scale can release up to 300,000 cubic yards of snowAvalanches are more commonly released by recreationists than by natural causesThe biggest factor of avalanche possibility is the accumulation snow over the winter seasonMore snow = bigger avalanche

Click on Image for An Avalanche Video

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Llaima

Villarrica

Antuco

Descabezado Grande

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In case of eruption.

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