TIME-TERM ANALYSES OF EXPLOSION SEISMIC DATA
TIME-TERM ANALYSES OF EXPLOSION SEISMIC DATA
复制标题
爆炸地震数据的时程分析
DOI：
10.4294/jpe1952.20.47
复制
发表时间：
1972
期刊：
影响因子：
--
通讯作者：
S. Asano
中科院分区：
文献类型：
--
作者：
T. Yoshii;S. Asano
利用时间项方法对两个地区的爆破地震资料进行了研究。松代震群区两条地震剖面的结果与ASANO等人的模型吻合得很好。在一条地震剖面中，走时残差的纵坐标与横坐标的距离呈凸形趋势，强烈地表明了基底层中存在垂直速度梯度。修正的时间项方法可以准确地确定与距离相关的速度。本研究中使用时间项方法获得的模型消除了HASHIZUME等人气仙沼-大贺剖面模型中的一些缺陷。特别值得注意的是，在本州-日本海边界附近的Pn速度的横向变化的可能性被指出。
Explosion seismic data in two regions are studied by utilizing the time-term method. The results of two profiles in the Matsushiro earthquake swarm area agree very well with the previous models by ASANO et al. In one profile, the travel-time residuals plotted in the ordinate to distances in the abscissa show a convex tendency which strongly suggests vertical velocity gradient in the basement layer. The distance-dependent velocity is determined accurately with the modified time-term method.Some defects in the model by HASHIZUME et al. for the Kesennuma-Oga profile are removed by the model obtained with the time-term method in the present study. It is particularly remarkable that the possibility of the lateral change in the Pn velocity near the Honshu-Japan Sea boundary is pointed out.