火山是一种地质现象,对地球环境的影响较大。火山爆发除了直接灾害外,还可能引起区域性、全球性气候异常,带来其他自然灾害。1991年我国华东地区出现了百年不遇的特大洪水,专家们分析后认为:菲律宾皮纳图博火山大爆发引起了亚洲广大地区天气异常,这可能是洪水爆发的主要原因之一。 Volcanoes are a geological phenomenon that has a great impact on the Earth’s environment. In addition to direct disasters, volcanic eruptions may cause regional and global climate anomalies and other natural disasters. In 1991, there was an extraordinary flood in East China in a hundred years. According to the experts’ analysis, the eruption of Pinatubo volcano in the Philippines caused unusual weather in most of Asia. This may be one of the major causes of floods.