根据含超压气体裂隙震源模式讨论P波初动符号的分布  

STUDY ON THE DISTRIBUTION OF THE FIRST MOTION MARK OF P WAVE BY USING THE SEISMIC SOURCE MODEL OF CRACK CONTAINING HYPERPRES SURE GAS

作　　者：王智培 

机构地区：[1]四川省绵阳市水利电力建筑勘察设计研究院

出　　处：《西北地震学报》1998年第1期14-20,共7页Northwestern Seismological Journal

摘　　要：利用含超压气体裂隙震源模式［１］分析研究了Ｐ波初动符号的分布．根据理论推导，不同倾角含超压气体裂隙可分别形成Ｐ波初动符号的四象限分布图象和圆、椭圆、抛物线、双曲线等圆锥曲线形Ｐ波节线．按节线形状和失稳方式进行了地震分类．所推论的初动Ｐ波。By using the seismic source model of crack containing hyperpressure gas ,the distribution of the first motion mark of P wave is studied.According to the deduction,the cracks containing hyperpressure gas with different inclination can form the distribution pattern in four quadrants of first motion mark of P wave and the nodal lines of P wave in the shape of conic section,such as circle,ellipse,parabola and double curve etc..According to the shape of nodal lines of P wave and type of instability,the earthquakes are classified.The distribution feature of first motion amplitude of P and S waves and the feature of ground deformation etc.deduced correspond with practice.

关 键 词：震源模式 超压气体 裂隙 P波 初动符号 

分 类 号：P315.3[天文地球—地震学]