Earthquake source and wave propagation modeling: development of methods and applications

地震强地面运动的可靠模拟需要了解震源和波传播现象。关键问题是研究震源特性和结构特性的联合效应，而这两者通常是分开研究的。该项目结合了捷克和德国研究小组的科学专业知识，旨在开发统一的三维数值模拟工具，以综合研究震源和地震波在现实介质中的传播。这将使我们能够研究三维组合效应，例如：有限范围震源对波传播的盆地效应，随机介质和高度非均匀断裂带中的高频震源指向性，以及利用滑动减弱和速率-状态摩擦模型在非平面断层上的动态震源模型的破裂传播和地震辐射。开发的方法也将应用于震源和结构层析成像，并将提供给科学界，以促进机构间的合作。

Reliable modeling of earthquake strong ground motions requires the understanding of seismic source and wave propagation phenomena. The key issue is the study of combined effects of the source characteristics and structural properties, which are usually investigated separately. Joining the scientific expertise of the Czech and German research groups, this project aims at the development of unified 3D numerical modeling tools for integrated studies of the earthquake source and the propagation of seismic waves through realistic media. This will allow us to investigate 3D combined effects, such as: basin effects on wave propagation from finite-extent earthquake sources, high-frequency source directivity in random media and in highly heterogeneous fault zones, and rupture propagation of and seismic radiation from dynamic source models on non-planar faults utilizing slip-weakening and rate-and-state friction models. The developed methods will be applied also in source and structural tomography and will be provided to the scientific community to facilitate inter-institutional cooperation.