JpGU-AGU Joint Meeting 2017

Presentation information

[EJ] Poster

S (Solid Earth Sciences) » S-SS Seismology

[S-SS11] [EJ] Seismic wave propagation: Theory and Application

Wed. May 24, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Kiwamu Nishida(Earthquake Research Institute, University of Tokyo), Hisashi Nakahara(Solid Earth Physics Laboratory, Department of Geophysics, Graduate School of Science, Tohoku University), Kazuya Shiraishi(Japan Agency for Marine-Earth Science and Technology), Jun Matsushima(School of Engineering, The University of Tokyo)

[SSS11-P03] Surface wave characteristics from ambient seismic noise in Northern China

*Yiqiong Li1 (1.Institute of Geophysics, China Earthquake Administration)

Keywords:Surface wave, Ambient seismic noise, Thick sediments

Studies have shown that the western Taiwan coastal plain is influenced by long-period ground motion from the 1999 Chi-Chi, Taiwan, earthquake, and engineering structures with natural vibration long-period are damaged by strong surface wave in the western coastal plain. The thick sediments in the western coastal plain are the main cause of the propagation of strong long-period ground motion. The thick sediments similar to in the western coastal plain also exist in northern China.

It is necessary to research the effects of thick sediments to long-period ground motion in northern China. We extract surface wave from ambient seismic noise in Northern China and analyze frequency spectrum of surface wave. Our purpose is to reveal the formation and propagation of long-period surface wave in thick sediments and to grasp the amplification effect of long-period ground motion due to the thick sediments.