Definition. Categories of natural disasters. Places of occurrence. Similarities & Differences. Outline:
What is a Natural Disaster? A natural disaster is an event caused by natural forces of nature that has a large effect on the human population.
Meteorological Natural disasters of the atmosphere
Types of Meteorological Disasters Hurricane, Typhoon, Cyclones. Tornadoes. Characteristics: Hard rain, flooding, high winds. Duration: 8 24 hours of full force
Cyclone, Typhoon, Tornado, Hurricane Whats the difference??
Cyclone, Typhoon, Hurricane Define: A tropical storm that forms over an ocean The difference is WHERE they form Cyclone: Asia, South of the Equator Typhoon: Asia, North of the Equator Hurricane: Atlantic Ocean & East Coast of North America
Tropical Storm Map
Test Your Knowledge Write these down: What wind storm occurs in these countries: United States: Australia: India: Japan: Canada:
Wait, whats a Tornado?? Isnt that the same??
Tornado A Tornado forms over land. Also called a Twister Most Of them occurs in Tornado Alley in the USA
Tornadoes Occurrence Worldwide Areas Worldwide which experience the highest chance of seeing tornados. shaded orange.
Tornado Alley Tornado Alley is the area where Tornados form the most. It includes the states of: Texas, Oklahoma, Kansas, Nebraska, and South Dakota
How and why do they occur? The middle states are located between the warm air of the Gulf of Mexico and the cold air of the Pacific Ocean from Canada.
Tornados vs. Hurricanes Tornado Hurricanes
Geological Disasters Natural disasters of the land
Earthquake? Whats that??
Earthquakes A sudden shaking of the ground as a result of movements of the earths tectonic plates
How do they happen? The earths surface rests on moving sheets of crust called tectonic plates These plates move VERY slowly
How do they happen? When the plates collide, they create mountains When the plates separate, they form volcanoes.
Hydrological Disasters Natural disasters of the water
Types of Meteorological Disasters Tsunami. A long, high sea wave caused by an earthquake or other disturbance. Floods. An overflow of water beyond its normal limits, especially over what is normally dry.
How do They Occur TSUNAMI FLOODS
Where do Tsunami Occur
Where do Floods occur
Lets see what they can do.
Statistics In 2012, there were 905 natural catastrophes worldwide. 93% of which were weather-related disasters. 45% were meteorological (storms) 36% were hydrological (floods) 12% were climatological (heat waves, cold waves, droughts, wildfires) 7 % were geophysical events (earthquakes and volcanic eruptions). Between 1980 and 2011 geophysical events accounted for 14% of all natural catastrophes.