Natural Disaster

2278 Words May 21st, 2012 10 Pages
Index
Introduction ……………………………………………………………....3
Earth quakes ……………………………………………..……………….3
Volcanic eruptions………………………………………………………...3
Floods………………………………………………………………..…….4
Limnic eruptions…………………………………………………………4
Tsunamis……………………………………………………………….…5
Blizzards …………………………………………………………………5
Droughts &Hailstorms ……………………………………………........6
Tornadoes & Fires …………………………………………….………..7
Gamma ray burst ……………………………………….………………7
Conclusion ………………………………………………………………7
References …………………………………………………………………………..…………….8

Natural disasters introduction A natural disaster is the effect of a natural hazard (e.g., flood, tornado, hurricane, volcanic eruption, earthquake, heatwave, or landslide). It leads to financial, environmental or human losses. The
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It is believed that Pompeii was destroyed by a pyroclastic flow. A lahar is a volcanic mudflow or landslide. The 1953 Tangiwai disaster was caused by a lahar, as was the 1985 Armero tragedy in which the town of Armero was buried and an estimated 23,000 people were killed.

A specific type of volcano is the supervolcano. According to the Toba catastrophe theory 70 to 75 thousand years ago a super volcanic event at Lake Toba reduced the human population to 10,000 or even 1,000 breeding pairs creating a bottleneck in human evolution. It also killed three quarters of all plant life in the northern hemisphere. The main danger from a super volcano is the immense cloud of ash which has a disastrous global effect on climate and temperature for many years.
Hydrological disasters
Floods
A flood is an overflow of an expanse of water that submerges land.[1] The EU Floods directive defines a flood as a temporary covering by water of land not normally covered by water.[2] In the sense of "flowing water", the word may also be applied to the inflow of the tide. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries.[3] While the size of a lake or other body of water will vary with seasonal changes in precipitation and

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