HR: 1340h
AN: S53A-1069    [Abstracts]
TI: Multi-Resolution Modeling of Ground Motion by Dynamic Rupture Propagation using Hybrid Technique of Finite Difference and Boundary Integral Equation Methods
AU: * Jo, N
EM: endyjo@seismic.snu.ac.kr
AF: School of Earth and Environmental Sciences, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, Seoul, 151-747 Korea, Republic of
AU: Kang, T
EM: tskang@seismic.snu.ac.kr
AF: Korea Earthquake Research Center, Korea Institute of Geosciences and Mineral Resources, 30, Gajeong-dong, Yuseong-gu, Daejeon, 305-305 Korea, Republic of
AU: Baag, C
EM: baagce@snu.ac.kr
AF: School of Earth and Environmental Sciences, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, Seoul, 151-747 Korea, Republic of
AB: We present a multi-resolution modeling of ground motion by dynamic rupture using a hybrid technique of a finite-difference method (FDM) and a boundary integral equation method (BIEM). The multi-resolution modeling is effective in the simulation of ground motion, because the high-frequency resolution is necessary only for vicinity of rupture and observation site to obtain the realistic and accurate results. The method is performed using discontinuous grids and locally variable time steps adapted to the local grid size. We use a fourth-order, staggered-grid, FDM based on the velocity-stress formulations of the elastodynamic equations for the modeling of wave propagation. For the simulation of dynamic rupture, we use the BIEM based on the representation theorem. For the modeling of ground motion, the BIEM domain for the computation of dynamic rupture is embedded in the FDM domain for the wave propagation. We apply this hybrid technique of FDM and BIEM to a multi-resolution modeling of wavefield induced by relative movement of curved and branched fault surfaces lying along an arbitrary direction as a more realistic model.
DE: 7209 Earthquake dynamics (1242)
DE: 7212 Earthquake ground motions and engineering seismology
SC: Seismology [S]
MN: Fall Meeting 2005