A STUDY ON DEPENDENCE OF LONG-PERIOD GROUND MOTIONS IN CHUKYO AREA ON SOURCE LOCATIONS BASED ON OBSERVATION AND FINITE DIFFERENCE ANALYSIS
A STUDY ON DEPENDENCE OF LONG-PERIOD GROUND MOTIONS IN CHUKYO AREA ON SOURCE LOCATIONS BASED ON OBSERVATION AND FINITE DIFFERENCE ANALYSIS
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DOI：
10.3130/aijs.81.1647
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Sayo Yamada;T. Hirai;N. Fukuwa
中科院分区：
文献类型：
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作者：
Sayo Yamada;T. Hirai;N. Fukuwa
通过地面运动观测和有限差分分析，阐明了地震波路径上的沉积盆地对长周期地震波的影响。楚乔地区的地震地面运动显示了新泻沉积盆地周围一次地震的长周期地震波传播。用三维有限差分法进行了数值分析，模拟了相同的现象。特别是，新泻沉积盆地下方的地震会产生长周期的地震波。此外，基于格林函数互易定理的三维有限差分分析结果表明，地震波路径上的沉积盆地引起了地震波的振幅增加和持续时间的延长。这些影响因沉积盆地的形状和大小以及地震波路径的不同而不同。
This study clarify that the sedimentary basin on the seismic wave path affects the long-period seismic wave, based on the ground motion observation and the finite difference analysis. Seismic ground motion in Chukyo area shows long-period seismic wave propagation for an earthquake around the Niigata sedimentary basin. The same phenomena are simulated by the numerical analysis using the 3D finite difference method. Particularly, an earthquake beneath the Niigata sedimentary basin generates long-period seismic wave. In addition, the sedimentary basin on the seismic wave path causes an increase of the amplitude and extension of the duration time, according to the result of the 3D finite difference analysis based on the reciprocity theorem of Green’s function. These effects are different due to the shape and the size of the sedimentary basin and the seismic wave paths.