Middle crust is located at 15~25 km depth , where high conductance layer and low velocity layer distributed.

对于地壳的地球物理详细探测发现中地壳普遍存在着高导层和低速层.

互联网

Reflections are interferences, especially irregular topography and low velocity layer when they travel through near surface.

反射波在经过近地表的过程中受到诸多因素的干扰, 尤其是地表起伏和近地表低降速带,对其影响甚大.

互联网