全球最壮观6大火山:完美锥形体VS地狱之门(6)
埃特纳火山
埃特纳火山海拔10922英尺,它是欧洲最活跃的火山之一,它成为地中海最大岛屿西西里岛的美丽景观之一。科学家认为埃特纳火山是地球上最古老的活跃火山,近十年前该火山多次喷发。在上世纪70年代和近10年,埃特纳火山喷发出环状烟雾,这是非常罕见的景象。
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