【摘要】 层裂是地下核爆炸震源物理过程中最重要的非球对称源过程.对其机制的研究,多基于面波资料,本文基于远场体波资料,利用经验格林函数方法,消除路径及接收场地效应,利用地下核爆炸远场地震波P波数据对震源时间函数进行了反演,结果显示明显的双脉冲特征,该二次源特征不随方位角及震中距变化,说明它源自震源本身,其双脉冲特征与层裂机制相符.更多还原

【Abstract】 It was widely accepted that the spall slapdown is the primary contributor to the non-spherical source of underground explosions based on the study of surface waves.In this article,body waves are analyzed to search the mechanism of the non-spherical process of the underground nuclear explosion.The second arrival after the P arrival is obvious and the shape of the two pulses is remarkably consistent in a wide azimuthal range.This indicates that the second arrival is not due to any structural features but is part of the source itself,and can be explained by the spall process.更多还原