由于巨大的重量向下压岩层，使它趋于在它的薄弱处向下折叠，这最终导致地壳的实质断裂。
Because of the great weight pressing down on them, these layers tend to fold downward at weak spots, and this finally causes an actual break in the crust.
而据我对该地区岩层的调查和研究，我发现核电厂下面的沉积床有严重断裂。
From my research and the investigation I conducted of the rocks in the area, I found that that the sedimentary beds underlying the plant were badly faulted.
这一信息可帮助计算地震能量释放速度，并以此计算岩层断裂速度。
That allows it to work out how quickly energy was released by the earthquake, and thus how fast the rupture propagated.
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