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 earthquakefocus, or initial rupture point.
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。
2
Using 40 mechanism solutions of earthquakefocus and 3 synthetic solutions of small earthquake, the crustal stress field in and around Gansu region is discussed.
本文利用40个地震震源机制解和3个小震综合解研究了甘肃及邻近地区的地壳应力场。
3
Nobody knows just how bad the damage is from the earthquake in Japan, and the current focus remains on preserving human life.