由于 P 波和 S 波以不同但相当恒定的速度传播，它们到达的间隔与到震源或初始破裂点的距离成比例地增加。
Because P and S waves travel at different but fairly constant speeds, the interval between their arrivals increases in proportion to the distance from the earthquake focus, or initial rupture point.
最后，内部的紧张局势并没有达到破裂点。
In the end, the internal tensions did not go to the breaking point.
频谱分析确定了破裂点脉动和螺旋波的频率特征。
Spectrum analysis reveals the frequency characteristics of vortex breakdown point oscillation and spiral wave.
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