剛性マトリックスに基づく地震動の波形合成法と震源断層近傍地震動の渦現象

抄録

The earthquake ground motions are efficiently simulated using a discrete three fold Fourier transform of the analytical forms of seismic wave field in frequency wavenumber domain. They are derived by a stiffness matrices based formulation of the physical processes of propagation of seismic waves, which are radiated from a kinematic rupturing fault model. It is found from a numerical example that the seismic wave field on free field ground surface near a strike slip fault is like a vortex of sea water.