文档介绍：609制作Natural disasters?The earth's natural variation, including human activity induced natural variation, when this kind of variation to the human society bring harm, is a natural disaster.?地球上的自然变异,包括人类活动诱发的自然变异,当这种变异给人类社会带来危害时,即构成自然灾害。Natural disasters around the world?Geological disasters, tsunami, earthquake, volcanic,landslide, debris flow)?地质灾害(海啸、地震、火山、滑坡、泥石流)?Flood and drought, flood, drought)?水旱灾害(洪涝、干旱)?Meteorological disaster (typhoon, storm surge, snow, hail, sandstorm, acid rain, thunder disaster)?气象灾害(台风、风暴潮、雪灾、雹灾、沙尘暴、酸雨、雷灾)?Biological disasters and forest grassland fire, etc.?生物灾害和森林草原火灾等。Earthquake?Now our country is in a ring Pacific seismic zone and asia-europe seismic zone between, is the continental earthquake most centralized country?我洋地震带和亚欧地震带之间,是全球大陆地震最集中的国家Earthquake hazard(危害)?Houses collapsed, communication power hindered?casualties?Trigger a tsunami, fire, landslides, debris flow,?The lake (later cause flooding)?Economic loss is very serious房屋倒塌、通讯电力受阻人员伤亡引发海啸、火灾、山体滑坡、泥石流、堰塞湖(既而引发洪灾)经济损失很严重堰塞湖?由火山熔岩流、冰碛物或地震活动等引起山崩滑坡体等堵截山谷,河谷或河床后贮水而形成的湖泊。?由火山溶岩流堵截而形成的湖泊又称为熔岩堰塞湖。如东北的五大连池?With the present technology, it is not enough to predict the earthquake happened. Because earthquakes occur without apparent sign of seismic wave is in earthquake is to produce, but now the earthquake high-risk countries have been able to advance half a minute to predict the earthquake.?以现在的技术来说,还不足以预测地震的发生。因为地震的发生没有明显的征兆,地震波也是在地震是才产生的,但是现在地震高发的国家已经能够提前半分钟预知地震了。