Abstract
The effects of basin-edge and soil velocity on the ground motion characteristics have been simulated using 2.5D modeling. One of the most significant advantages of the 2.5D simulation is that 3D radiation pattern can be generated in a 2D numerical grid using double-couple shear dislocation source. Further, 2.5D numerical modeling avoids the extensive computational cost of 3D modeling. The responses of basin-edge model using different soil velocities revealed that surface waves were generated near the edge of the basin and propagated normal to the edge, towards the basin. Further, the results depict increase of amplification, duration and surface wave generation with the decrease in soil velocity.
Similar content being viewed by others
References
Graves R W 1996 Simulating seismic wave propagation in 3D elastic media using staggered grid finite difference;Bull. Seism. Soc. Am. 86 1091–1106
Hatayama K K, Matsunami T Iwata and Irikura K 1995 Basin-induced love waves in the eastern part of the Osaka basin;J. Phys. Earth 43 131–155
Israeli M and Orszag S A 1981 Approximation of radiation boundary conditions;J. Comp. Phys. 41 115–135
Kawase H 1996 The cause of damage belt in Kobe: “The basin-edge effect”, constructive interference of the direct S-waves with the basin induced diffracted/Rayleigh waves;Seism. Res. Lett. 67 25–34
Narayan J P 1998 2.5D numerical simulation of acoustic wave propagation;Pure and Appl. Geophys. 151 47–61
Narayan J P 1999 2.5-dimensional cross-hole acoustic response: a variable density approach;Geophys. J. Int. 139 879–887
Narayan J P 2001 Site specific strong ground motion prediction using 2.5D modeling;Geophys. J. Int. 146 269–281
Ohminato T and Chouet B A 1997 A free surface boundary condition for including 3D topography in the finite difference method;Bull. Seism. Soc. Am. 87 494–515
Pitarka A 1999 3D elastic finite difference modeling of seismic motion using staggered grids with nonuniform spacing;Bull. Seism. Soc. Am. 89 54–68
Takenaka H and Kennett B L N 1996 A 2.5D time domain elasto-dynamic equation for plane wave incidence;Geophys. J. Int. 125 F5-F9
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Narayan, J.P. 2.5D Simulation of basin-edge effects on the ground motion characteristics. J Earth Syst Sci 112, 463–469 (2003). https://doi.org/10.1007/BF02709272
Issue Date:
DOI: https://doi.org/10.1007/BF02709272