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Natural Disasters

Examining Earth's disasters and their effect on human societies.
by

Natural Disasters

on 26 October 2012

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Transcript of Natural Disasters

By: Victoria Johnson, Cody Nations, Phillip Styles, Kaylan Lindecamp Natural Disasters photo credit Nasa / Goddard Space Flight Center / Reto Stöckli What is a natural disaster? According to Dictionary.com; a natural disaster is "any event or force of nature having catastrophic consequences." This includes: Body Body Body Body Body Body Body Body Body Body Body Body Hurricanes Tsunamis Volcanoes What is a Hurricane? Hurricanes: Tropical Cyclone
Winds Greater than 74 mph
Starts as "Tropical Storm" (wind speeds of 39-73 mph)
Builds over weeks to become hurricane Derrived from Spanish word:
"Huracan" Classified by the Saffir-Simpson Hurricane Wind Scale
1-2: Tropical Storms wind speeds > 74 mph
Category 3: 111-129 mph winds
Category 4: 130-456 mph winds
Category 5: 157+ mph winds
http://www.nhc.noaa.gov/aboutsshws.php Five Categories of Hurricane: "A Large Heat Engine"
Fuel= Warm moisture from water in the tropics
Moisture = Heat ---> Thunderstorms
Spiral rain bands around core feed it more energy
Air is pushed towards the center, "rises rapidly and produces more and rain"
Result= low surface pressure and strengthening winds



http://www.nhc.noaa.gov/climo/ So now you know what it is, but how is it? Storm surges along the coast
Damage from winds and heavy rainfall
Heavy Flooding along the coast
Flying debris
Mudslides/flash floods in higher elevations



http://www.ready.gov/hurricanes How do Hurricanes effect us? Image retrieved from:
http://geology.com/hurricanes/named-hurricane-fran.gif Tsunamis What is a Tsunami? A Tsunami is a triggered by an underwater earthquake, which really makes it two natural disasters in one. It is "a series of ocean waves, that sends surges of water onto land that can sometimes reach a 100 foot." According to the Natural Geographic website. 80% of The World's Tsunami happen in the Pacific oceans Ring of Fire!
Move across the ocean at speeds up to 500 MPH!
In the open ocean the wave height may only be about a foot high, as they reach the shoreline they gain height in shallow water!
According to the National Geographic Website
http://environment.nationalgeographic.com/environment/natural-disasters/tsunami-profile/ Volcanoes What is a volcano? image retrieved from:
http://lifeatgentility.wordpress.com/2011/05/11/volcanoes-101-week-3-part-1/ a vent in the earth's crust through which lava, steam, ash, etc., are expelled either continuously or at irregular intervals
usually having a cuplike crater at the summit Volcano comes from the Roman god "Vulcan" who is the god of fire. definition retrieved from:
http://dictionary.reference.com/browse/volcano The Ring of Fire

is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean.
In a 40,000 km (25,000 mi) horseshoe shape
associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts plate movement
The Ring of Fire has 452 volcanoes and is home to over 75% of the world's active and dormant volcanoes.
The Ring of Fire is a direct result of plate tectonics and the movement and collisions of lithospheric plates. Where can volcanoes be found? When volcanoes erupt they produce a great deal of pyroclastic debris or ash.
Heavy ash fall can result in roof cave ins and poor air quality.
Hot ash and lava can lead to severe burns and even death if the burns are severe enough. What hazards are associated with volcanic eruptions? retrieved from: http://volcanoes.usgs.gov/ash/health/ Mount Etna: Located on the east coast of Sicily Department of Homeland Security: FEMA. Hurricanes. Retrieved October 24, 2012, from: http://www.ready.gov/hurricanes
National Hurricane Center (2012). Siffer-Simpson Hurricane Wind Scale. Retrieved October 24, 2012, from: http://www.nhc.noaa.gov/aboutsshws.php
National Hurricane Center (2012). Tropical Cyclone Climatology. Retrieved October 24, 2012, from: http://www.nhc.noaa.gov/climo/
Natural Disaster. (n.d.). Dictionary.com's 21st Century Lexicon. Retrieved October 24, 2012, from: http://dictionary.reference.com/browse/Natural Disaster
Tsunamis: Killer Waves. National Geographic. Retrieved October 24, 2012, from: http://environment.nationalgeographic.com/environment/natural-disasters/tsunami-profile/
Volcano. (n.d.). Collins English Dictionary - Complete & Unabridged 10th Edition. Retrieved October 23, 2012, from Dictionary.com website: http://dictionary.reference.com/browse/volcano
http://geology.com/hurricanes/named-hurricane-fran.gif
http://lifeatgentility.wordpress.com/2011/05/11/volcanoes-101-week-3-part-1/ Works Cited
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