波速度

• The velocity ratio or poisson ratio variaton can be obtained by comparing pn and sn velocities . 3 , in comparing pn and sn velocity variation with geology , we will find that high velocity regions always exist in old stable basin and terra , but low velocity regions lie in active extensional basin , volcano area and magmatic rock regions
  中国大陆上地慢顶部体波速度层析成像3 、将pn波速度和sn波速度横向变化与地质构造对比发现，地震波速高的地区往往是构造上比较稳定的古老盆地、地台等，而地震波速低的地区是在构造上比较活动的张性盆地，火山活动区和岩浆岩分布区。