During that first exploration, we traced the major east-west fault line, called the Delphi fault, that de Boer had observed during the earlier survey. 在第一次的调查期间，我们追查主要的东西向断层线，即狄波尔在较早的调查曾观察过的断层，名叫德尔菲断层。
It is prone to seismic upheaval due to its location on the so-called Pacific Ring of Fire, an arc of volcanos and fault lines encircling the Pacific Basin. 太平洋火圈是环绕太平洋盆地的火山弧和断层线。
