The rationality for spectral ratio method of horizontal to vert ical component ( H/V method) for microtremors is discussed with a model of an elastic laye r over a half-space.

• 应用概率统计方法,采用弹性成层介质模型,导出地下体波斜入射成层介质,在自由表面形成面波地脉动的水平分量与竖向分量谱比表达式。