Development of real-time and quasi real-time long period strong motionevaluation methods based on observation records

本研究旨在发展长周期地震动的实时与准实时评估方法，以达到减少震害、快速评估灾情、快速反应的目的。建立了日本东北地区的强震数据库。提出了由近震源台的P波振幅实时估算远台S波幅的方法。提出了基于地震基岩空间内插和深层地下结构放大的地震反应谱分布估计方法。这些方法在2005年宫城地震中的适用性得到了证实。

The purpose of this study is development of real-time and quasi real-time evaluation methods of long-period ground motion, in order for earthquake damage reduction, rapid damage estimation, and quick response. A strong-motion database is constructed for the Tohoku region, Japan. The real-time estimation method of S-wave amplitudes at far stations from P-wave amplitudes at near-source stations is developed. Also, the method to estimate distribution of response spectra is developed based on spatial interpolation on seismic bedrock and amplification by deep underground structure. The applicability of these methods is confirmed for the 2005 Miyagi-oki earthquake.