Effects of Topography on Seismic-Wave Propagation: An Example from Northern Taiwan

Effects of Topography on Seismic-Wave Propagation: An Example from Northern Taiwan

Topography influences ground motion and, in general, increases the amplitude of shaking at mountain tops and ridges, whereas valleys have reduced ground motions, as is observed from data recorded during and after real earthquakes and from numerical simulations. However, recent publications have focused mainly on the implications for ground motion in the mountainous regions themselves, whereas t...

Fundamentals of Seismic Wave Propagation

Seismic Wave-Field Propagation Modelling using the Euler Method

Wave-field extrapolation based on solving the wave equation is an important step in seismic modeling and needs a high level of accuracy. It has been implemented through a various numerical methods such as finite difference method as the most popular and conventional one. Moreover, the main drawbacks of the finite difference method are the low level of accuracy and the numerical dispersion for l...

Surface Wave Propagation Effects Observed at the Saudi Seismic Network

Global surface wave arrival angles (also called polarization data) are extremely useful data to constrain the shortwavelength structure in global surface wave phase velocity maps. This paper investigates the feasibility of using such data on a more regional scale to validate regional models. We measure the arrival angles at the Saudi Arabian Seismic Network and compare them with predictions cal...

Seismic Wave Generation and Propagation from Complex 3d Explosion Sources

The objective of this new project is to investigate the generation of complex seismic waves by explosions in media with realistic three-dimensional (3D) heterogeneity, including topography. To do this, we use information on subsurface heterogeneity from nuclear test sites to develop 3D models that have the characteristics of the emplacement media for actual nuclear tests. We then run calculatio...