Based on tri component measurement of microtremor on different thickness sediment layers in Yinchuan basin,the curves of ratio of horizontal spectrum to vertical spectrum were drawn.

• 根据银川盆地不同厚度覆盖层上的三分向(东西、南北和垂直)地脉动测量数据；绘制出水平向振幅谱与垂直向振幅谱的比值曲线.