Tornado
Tornado winds swirl is a strong wind from a collection of medium strong current dark clouds that stretched into the earth's surface. When he appeared Tornado winds, often accompanied by one or more funnel-shaped cloud pillars such as "elephant trunk" of the cloud base and stuck to the bottom, along with wind and rain storms, lightning or rambun (ice cubes). If the Tornado through the surface of the water, he can draw water up, and form the pillars of water, adjacent to the clouds. If passed the mainland, will often break down the house, uprooted electric poles, even interesting people, animals or other objects into the vortex and taken elsewhere. Tornado winds often occur in times of rain accompanied by lightning in the summer, and most came in the afternoon until late night, small-scale terjangannya, Tornado diameter typically ranges from tens to hundreds of meters. Tornado duration time is usually only a few minutes, the longest not more than a few hours. Brunt of the wind is very strong, the wind speed around the center can reach 100-200 meters / hour. Perusaknya very strong power, where the tornado passed by wind, often will make the trees in its path ripped from its roots, back flip over cars, destroy buildings and so forth, sometimes interesting to go man. Thypoon
Cyclone systems (swirling wind) the tropics rather strongly that occurred in southern sea waters and the western Pacific Ocean, called Thypoon. In earlier 1989, the World Meteorological Organization (WMO) set, that according to the average size of wind power in the strongest winds swirling around the center of the tropics, tropical turbulence divided by 4 categories of tropical low pressure, tropical storm winds, a strong tropical storm winds and hurricane. Tropical turbulence with wind power under 8 level is called a tropical low pressure, called the 8-9 level tropical wind storms, called the level of 10-11 tropical storms strong winds, above 12 or 12 level is called Typhoon. Tropical turbulence with wind power or 12 levels above the 12 level at about the center of Australia, the eastern Pacific Ocean, Atlantic Ocean called Thypoon. Earthquake
The earthquake, which is fast vibration lithosphere. Based on the causes of earthquakes can be divided into two types: tectonic earthquakes and volcanic earthquakes. Tectonic earthquakes most extensive impact on humans. Occurrence of this earthquake because the voltage of the earth, causing structural changes in the earth. Layers of rock in the crust, which under the effect of earth stress in the long run, will be the slope and curve, while the accumulated earth voltage exceeds the maximum limit that can hold the rock, there will be mistakes and cracks where suddenly in the rock layers weak, so that the energy accumulated in the long term suddenly released, and spread to the 4 corners in the form of earthquake waves, resulting in vibrations in the earth's surface. Tsunami
Tsunami is a sea wave that has a strong destructive power. Earth activities such as undersea earthquakes, volcanic eruptions or landslides and so on will also likely result in the Tsunami. When an earthquake happens, stratum (layer) having split the sea floor, some stratum rise or sink suddenly, and has resulted in all layers of the seabed to the surface of experience "shocks" hard. "Shock" is not the same as the ordinary wave we encounter. Ocean waves are generally only ride around the surface, the depth is not great. Was "shock" caused by sea water all the earthquakes are fluctuations of the water system to the surface of the sea surface, the energy contained in it is very surprising. Vulcano (Volcano Eruption)
Volcanoes belching mountain is not "fire", which is a substance disemburkannya thick high-temperature, and this substance is called magma (lava). When volcanoes erupt, the landscape will look very amazing. Because of the high temperature, and strong pressure from the earth's crust, therefore, if met with a rather thin region and bercelah, it will slide into laharnya pouring surface. Occurrence of the volcano is below the earth's surface, the deeper areas, the temperature will be higher, at a depth of about 20 miles, enough to melt the high temperature most of the rocks. When rocks melt will expand and need more space. Dilumerkan material by high temperature will rise through the cracks. When the pressure is greater than lava rocks on the surface pressure, would explode and form a volcano.source : national geographic
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