Sketch illustrating melting at a subduction zone .

这幅简图揭示了俯冲带发生的熔化现象。

Active subduction off the indian ocean coast of sumatra is responsible for both the region 's geography and its earthquakes .

在苏门答腊岛印度洋一侧海岸外，（海底）活跃的俯冲地质运动，是形成该地地理（特征），造成地震多发的原因。

Additional sedimentation occurred until a subduction zone formed off the coast .

直至一个潜没带在距离海岸处形成前，额外的沉积作用一直存在。

How do earthquakes arise in undersea subduction zones , which account for 90 per cent of all seismic energy released worldwide ?

占全球地震能量释放90%的地震是怎样发生于海底俯冲区的？

The cascadia subduction zone , just 50 miles off the coast and stretching from northern california to southern british columbia , is accumulating stresses that could unleash an earthquake of magnitude 9.0 and generate its own tsunami .

距离海岸50英里的卡斯卡地亚俯冲带，从加州北部延伸至英属哥伦比亚南部，预计可以缓冲9级地震及其造成的海啸。