The dispersion is due to the inhomogeneity of medium, which will lead the energy of sound to deviate from its directionofpropagation.
另一部分则是由于声波在不均匀介质中的声散射把能量散射到其他方向,而使原来传播方向上的声波能量减弱。
2
The observations of seismologists at the BGS suggest both things: more thrust in the SW, nearer the epicentre, and more strike-slip toward its directionofpropagation, the NE.