Journal of Physics of the Earth
Online ISSN : 1884-2305
Print ISSN : 0022-3743
ISSN-L : 0022-3743
TIME-TERM ANALYSES OF EXPLOSION SEISMIC DATA
Toshikatsu YOSHIIShuzo ASANO
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ジャーナル フリー

1972 年 20 巻 1 号 p. 47-57

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抄録
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.
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© The Seismological Society of Japan
Copyright© The Geodetic Society of Japan
Copyright© The Volcanological Society of Japan
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