Iceland lies on the convergence of two tectonic plates and is one of the most volcanically active areas in the world .
冰岛位于两大地壳板块的交界处，是世界上火山活动最活跃的地区之一。
In alaska in the aleutian islands-it 's a volcanically active area-and there 's a lot of flight pathways that would cross where that ash would potentially drift .
阿留申群岛的阿拉斯加是火山活跃区--这里有很多航线经过，而火山灰也很可能飘到这。
In fact , since seismic shifts are so closely related to volcanic action , geologists listen in to the seismic movements around volcanically active regions to predict when earthquakes might spark volcanic eruptions .
Roger phillips , a planetary scientist at the southwest research institute , called the result " as close as possible to a smoking gun " in the hunt for evidence that venus is volcanically active .
Knowing that venus is volcanically active could shed light on the mysterious geological history of earth 's sister planet , which does not have plate tectonics , meaning the planet 's surface does not evolve through a process of rigid plates slowly shifting across the underlying mantle .
