美国西北部中心地带的超级火山已使该国陷入“核冬天”的危机中。美国怀俄明州和蒙大拿州黄石国家公园的这座火山位于一个巨大熔岩带的上面,最后一次喷发出现在64万年前。这里是世界上最大的活性大陆硅火山区之一。专家警告,如果黄石公园火山喷发,它的威力会比1980年圣海伦斯火山的喷发强大1000倍。科学家称:“尽管它休眠了7万多年,但我们不能排除有朝一日它会喷发的可能性。当然,这种几率 The super volcanoes in the heart of northwestern United States have plunged the country into a crisis of ”nuclear winter.“ This volcano, located in Wyoming, Wyoming, and Yellowstone National Park, Montana, is located above a huge lava belt with the last eruption of 640,000 years ago. Here is one of the largest active volcanoes in the world. Experts warn that if Yellowstone Volcano eruption, its power than the 1980 St. Helens volcano eruption 1000 times stronger. Scientists say: ”Although it sleeps more than 70,000 years, we can not rule out the possibility that it will erupt someday.