Chinese seismologists said the quake was magnitude 7.1 .

中国地震学家称，这次地震的震级为7.1级。

U.s. geological survey seismologists subsequently found a strong link between the quakes and the refilling of the reservoir .

美国地质勘探局的地震学家后来发现，这一系列的地震和大坝重新蓄水之间存在着很大的关联。

Given that history , seismologists in japan did not consider great earthquakes to be a threat to the sendai area .

基于以上史实，日本的地震学家此前并不认为此次强烈地震对仙台地区会造成巨大威胁。

As if that were not enough , japan 's seismologists say there isa high risk of more big aftershocks in the coming days .

这还不够，日本的地震学家认为，未来几天发生多次大余震的风险较高。

But the strange truth is that seismologists and geophysicists are quite unsure of what happens inside the planet during a quake .

但地震学家和地球物理学家却不敢肯定在地震期间地球内部发生了什么。