日本地球惑星科学連合2018年大会

講演情報

[EJ] ポスター発表

セッション記号 S (固体地球科学) » S-SS 地震学

[S-SS10] 地震波伝播:理論と応用

2018年5月24日(木) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:西田 究(東京大学地震研究所)、白石 和也(海洋研究開発機構)、新部 貴夫((株)地球科学総合研究所、共同)、澤崎 郁(防災科学技術研究所)

[SSS10-P14] 2 D Wave propagation using the Finite Difference Method

*Asha Rani Sharma1 (1.Kurukshetra University)

キーワード:SH wave, PML, Finite difference

Earthquake ground motion can be affected by a number of factors such as anisotropy topography and soil sediments, scattering, and diffraction. Geological structure such as fold and faults directly affect seismic wave propagation due to scattering or diffraction. It is considered at the interface of having different acoustic impedance P wave converted into P and SV and S wave converted into SV and SH wave. SH wave have the tendency to amplify the earthquake so it is required to model the SH wave. In the present study SH wave is modeled using the finite difference method on staggered grid. In this method space time grid covers the domain of the computation. In the present study uniform grid is designed to solve the problem as simple as. Finite difference scheme given by Virieux (1984) is used to modeled the SH wave. Velocity and stress are used at the discrete grid point. A simple model is used for a homogenous sedimentary layered structure. For the velocity and density prior information is used. Staggered finite difference has the high order precision. Perfectly matched layer(PML) also considered in the present work.