利用深源远震记录波形研究台站区域的介质结构

本文通过北京房山周口店台维开克型地震仪的两个深源远震记录波形实例,阐明了借助综合地震图的计算来研究该台站下方介质结构的方法。 文中给出14个典型模型的综合地震图与观测波形的对比分析。结果表明,应用本文提供的方法,对介质模型的可接受程度,可由理论波形与观测波形的可相比拟程度进行判断。文中据此给出了该台站下方的介质结构模型。

THE STUDY OF CRUST AND UPPER MANTLE STRUCTUREBELOW THE RECORDING STATION BY MEANSOF TELESEISMIC P WAVEFORMS

In this paper,we propose a method for the study of crust and upper mantle structure below the seismic recording station by means of synthetic seismograms. Using two teleseismic P waveforms recorded by Vegik seismograph at Zhoukoudian station,Fangshan county of Beijing,we have evaluated the merit of this method.Fourteen synthetic P waveforms of several typical crust and upper mantle structure models have been shown in this paper,in comparison with the observed P waveforms recorded. Our results show that the best model chosen by this method depends on the degree of similarity between the synthetic and observed P waveforms. On this ground we also provide for the first time the most probable crust and upper mantle structure below Zhoukoudian station.