Because P and Swaves 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.
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
Both P and Swaves refract or reflect at points where layers of differing physical properties meet.
和S波都在具有不同物理性质的地层相遇处折射或者反射。
3
And researchers found that P waves travel through both liquids and solids while swaves travel only through solid matter.