1、Natural disastersvolcanic eruption,2110915448邱银,Natural disasters Natural disasters are abnormal phenomenon of the nature, the damage is often shocking. Such as earthquake, volcanic eruption, landslides（滑坡）, tsunamis（海啸）, typhoon(台风), flood,etc.They will cause great damage to human life and property
2、.,The magma（岩浆） of the inner earth erupts out of the surface, and then accumulates,which makes of volcano. It canbe divided into two kinds extinct volcano（死火山） and active volcano（活火山）.,volcano,we know the number of the extinct volcano is 2000, and the number of active volcano is 523, and they are 45
3、5 located in the land, 68 in the seabed. Volcano on Earth is not uniform, and they all appear in the fault zone （断裂带） of the crust.,美国 奥古斯丁火山,We can see the volcanic areas mainly located in the edge of the Pacific ,Indonesia(印度尼西亚), the Himalayas(喜马拉雅山脉) and the Mediterranean（地中海）, Where the distrib
4、ution of the 80 percent of the active volcanoes .,Volcanic activity can emit a variety of substances, and if the jet of gas substances are more prone to explosion . Ejecta(喷出物) are in solid, liquid, gas and radioactive substances, etc,animal and plant.,Disadvantage,Volcanic eruptions tend to cause f
5、ire,and mud flows, flooding vast areas, washing,away any building, killing people, property,damaged, endangering life of the human,Advantage,However ,volcanic eruptions are not all bad: the unique volcanic geology and topography, post-volcanic geothermal, hot springs, is often become tourist resort,
6、 fertile volcanic soil is conducive to agricultural production. Continuous volcanic eruptions can form the mainland , such as Hawaii and Iceland ,etc,Icelands volcanic eruption started On the 14th of this month, till now has tended to ease. It is reported that this eruption may seem scary, but only
7、moderate levels of volcanic eruptions are relatively not very deep impact, and people have returned to normal life . As the eruption produce a large number of volcanic ash, causing chaos in the European air transportation, the aviation industry alone lost close to two billion dollars, But fortunatel
8、y there is not too much damage in property and peoples life.,The ash and gas of the volcanic eruption is harmful to human, which will gone with wind , a wide scope will be affected. Recently, there are many rumors saying that Chinas acid rain is subject to its influence, but the China Meteorological Administration released information shows that our country has not been affected.,you,Thank,
