Control Factors of Spatial Variation of Long-Period Strong Ground Motions in the Yufutsu Sedimentary Basin, Hokkaido, during the Mw 8.0 2003 Tokachi-oki, Japan, Earthquake
Control Factors of Spatial Variation of Long-Period Strong Ground Motions in the Yufutsu Sedimentary Basin, Hokkaido, during the Mw 8.0 2003 Tokachi-oki, Japan, Earthquake
复制标题
2003年日本十胜大地震期间北海道由富津沉积盆地长周期强地震动空间变化的控制因素
DOI：
10.1785/0120060200
复制
发表时间：
2007
影响因子：
3
通讯作者：
K. Kudo
中科院分区：
文献类型：
--
作者：
K. Hatayama;T. Kanno;K. Kudo
我们成功地再现了长周期（7至8秒），大振幅地震动观测在Yufutsu盆地，北海道，在2003年日本十胜冲Mw 8.0地震，波传播的数值模拟的重要功能。日本密集的全国性强地震动台网记录表明，在Yufutsu盆地内的长周期强地震动的空间变化显着，并揭示了长周期震动在Tomakomai西部港口是最强的所有网站内的盆地。在解释或预测沉积盆地中的长周期强地面运动时，深盆地结构的重要性，例如S波速度超过3 km/sec的基岩深度一直受到强调。然而，解释观测结果的汤伏盆地地下结构模型的特征表明，近地表厚度（
We successfully reproduced important features of long-period (7 to 8 sec), large-amplitude ground motions observed in the Yufutsu basin, Hokkaido, during the M w 8.0 2003 Tokachi-oki, Japan, earthquake through numerical simulation of wave propagation. Recordings from the dense nationwide strong ground motion networks in Japan demonstrated significant spatial variation of long-period strong ground motions within the Yufutsu basin and revealed that the long-period shaking in the Tomakomai western port was the strongest of all the sites within the basin. In interpreting or predicting long-period strong ground motions in sedimentary basins, the importance of deep basin structures, such as the depth of bedrock with an S -wave velocity over 3 km/sec has been emphasized. However, the characteristics of the underground structure model of the Yufutsu basin that explain the observations indicate that thickness of near-surface (