Natural disasters are events caused by natural hazards like floods, earthquakes, or volcanoes that harm the environment and cause financial, environmental and human losses. Earthquakes are caused by the release of built-up stress along geological faults and while the quakes themselves don't usually kill people, secondary events like building collapses, fires, tsunamis or volcanic eruptions often cause loss of life. Tsunamis are massive waves caused by underwater earthquakes, volcanic eruptions or landslides that displace large amounts of water and while they look like normal waves from a distance, up close they contain immense energy and propagate at high speeds, making them more dangerous. Avalanches are rapid flows of snow down

1. Natural Disaters By: Julián Gomez Jesús Adame Jorge Tirado Daniel Rendón Aelyn Chong Andrea Lavenant

2. Definition A natural disaster is the effect of a natural hazard (e.g. flood, tornado, volcano eruption, earthquake, or landslide) that affects the environment, and leads to financial, environmental and/or human losses. The resulting loss depends on the capacity of the population to support or resist the disaster, and their resilience.

3. Earthquakes An Earthquake is a sudden shake of the Earth's crust.The vibrations may vary in magnitude. The underground point of origin of the earthquake is called the "focus". The point directly above the focus on the surface is called the"epicentre". Earthquakes by themselves rarely kill people or wildlife. It is usually the secondary events that they trigger, such as building collapse, fires, tsunamis (seismic sea waves) and volcanoes, that are actually the human disaster. As many of these could be avoided by better construction, safety systems, early warning and evacuation planning, the term unnatural disaster is not unwarranted. Earthquakes are caused by the discharge of accumulated along geologic faults.

4. Hailstorms Hailstorms (AKA hailstones) are rain drops that have formed together into ice. A particularly damaging hailstorm hit Munich, Germany on August 31, 1986, felling thousands of trees and causing millions of dollars in insurance claims.

5. Tsunami A tsunami is a massive wave of water which rolls into the shore area with a height of 15m +. Tsunami's are caused by displacement of large masses of water such as an underwater earthquake, volcanic eruption, landslide, or meteorite impact; most common being the earthquake. Tsunami's are caused when the sea floor deforms and vertically displaces the water on top. A tsunami is not a normal wave but much bigger. It looks more like an endlessly onrushing tide that forces it way around the obstacle. They are much more dangerous than big waves because they contain immense energy and propagate at high speeds.

7. Tornadoes A tornado is a destructive whirling wind accompanied by a funnel-shaped cloud extending down from a cumulonimbus cloud. Tornadoes can spin at speeds up to 500 miles per hour and annihilate anything in its path in a matter of seconds.