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Term 2 - Natural Disasters Unit

By Thomas Carey Yr 6

Contents:

  Page/ Link 1 - Boxing Day Disaster (Tsunamis & Earthquakes)

 

  Page/ Link 2 - The Thredbo Disaster (Landslide Narrative)

  

  Page/ Link 3 - How Volcanoes Erupt

 

  Page/ Link 4 - Survival Manual (Heatwaves)

  My Website includes some interesting facts, pictures and a general overview regarding the dedliest natural disasters recorded on the face of the earth. My website also includes some intresting infomation about the real potential of mother natures wrath. Hope you enjoy my website! 

10. Landslide

Image-15

 

A landslide is a disaster involving elements of the ground, including rocks, trees, parts of houses, and anything else which may happen to be swept up. Landslides can be caused by an earthquake, volcanic eruptions, or general instability in the surrounding land. Mudslides or mudflows, are a special case of landslides, in which heavy rainfall causes loose soil on steep terrain to collapse and slide downwards.

9. Avalanche 
Avalanche

 

An avalanche is a hazard involving a slide of a large snow or rock mass down a mountainside, caused when a buildup of material is released down a slope, it is one of the major dangers faced in the mountains in winter. As avalanches move down the slope they may entrain snow from the snowpack and grow in size. The snow may also mix with the air and form a powder cloud. An avalanche with a powder cloud is known as a powder snow avalanche. The powder cloud is a rough suspension of snow particles that flows as a gravity current.

8. Drought 
Drought

 

A drought is an extended period of months or years when a region suffers a severe deficiency in its water supply. Generally, this occurs when a region receives consistently below average rainfall. It can have a impact on the ecosystem and agriculture of the affected region. Although droughts can persist for several years, even a short, intense drought can cause significant damage and harm the local economy.

7. Wildfire 

Wildfire

 

Wildfires, or forest fires, are uncontrolled fires burning in wildland areas. Common causes include lightning, human carelessness, arson and volcano eruptionions. They can be a threat to those in rural areas and also to wildlife. Wildfires can also produce ember attacks, where floating embers set fire to buildings at a distance from the fire itself.

6. Flood 
Flood6

 

A flood is an overflow of  water that submerges land. It is usually due to the volume of water within a body of water, such as a river or lake, exceeding the total capacity of the body, and as a result some of the water flows or sits outside of the normal perimeter of the body. It can also occur in rivers, when the strength of the river is so high it flows right out of the river channel , usually at corners.

5. Tsunami 
Picture 1-11

 

A tsunami is a series of waves created when  water, such as an ocean, is rapidly displaced. Earthquakes, mass movements above or below water, volcanic eruptions and other underwater explosions, landslides, large meteorite impacts comet impacts and testing with nuclear weapons at sea all have the potential to generate a tsunami. A tsunami is not the same thing as a tidal wave, which will generally have a far less damaging effect than a Tsunami.

4. Volcanic eruption 
Puuoo

 

A volcanic eruption is the point in which a volcano is active and releases lava and poisonous gasses in to the air. They range from daily small eruptions to extremely infrequent supervolcano eruptions. Some eruptions contain, high-temperature clouds of ash and steam that can travel down mountainsides at speeds exceeding that of an airliner.

3. Tornado 
Grady Tornado 330314

 

Tornadoes are violent, rotating columns of air which can blow at speeds between 50 and 300 mph, and possibly higher. Tornadoes can occur one at a time, or can occur in large tornado outbreaks along squall lines or in other large areas of thunderstorm development. Waterspouts are tornadoes occurring over water in light rain conditions.

2. Earthquake 
Expressway

 

An earthquake is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as a seismograph. The magnitude of an earthquake is conventionally reported on the Richter scale, with magnitude 3 or lower earthquakes being mostly imperceptible and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale. At the Earth’s surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground.

1. Hurricane
Hurricane Isabel2

 

Hurricanes, tropical cyclones, and typhoons are different names for the same phenomenon: a cyclonic storm system that forms over the oceans. It is caused by evaporated water that comes off of the ocean and becomes a storm. The Effect causes the storms to spin, and a hurricane is declared when this spinning mass of storms attains a wind speed greater than 74 mph. Hurricane is used for these in the Atlantic and eastern Pacific Oceans, tropical cyclone in the Indian, and typhoon in the western Pacific