And when you dive into that rift valley, that's where the action is because literally thousands of active volcanoes are going off at any point in time all along this 40,000 mile range.
この地溝帯こそ 活動の現場なのです ここには文字通り数千の活火山が 6万kmの長さに渡って 常時噴火を続けているからです