Synthetic Surface Wave Seismograms on a Laterally Heterogeneous Earth

这项研究是为了发展一个更好的理论， Love和Rayleigh表面波在横向介质上的传播 非均质地球模型 该理论使用一个缓慢变化的 拉格朗日方法来发展一个JWKB理论，然后扩展 在JWKB-马斯洛夫的方式是有效的焦散附近，也就是说，近 表面波的源和对极。 不像其他 理论，这将适用于整个地球。 由此产生的计算机程序将应用于研究 包括几何聚焦的表面波振幅变化 以及散焦、横向非均匀滞弹性， 震源方向性 这项研究是 国家地震减灾计划。

This research is to develop a better theory governing the propagation of Love and Rayleigh surface waves on a laterally heterogeneous earth model. The theory uses a slowly varying Lagrangian method to develop a JWKB theory that is then extended in a JWKB-Maslov manner to be valid near caustics, that is, near the source and antipode of the surface waves. Unlike other theories, this then will be applicable over the entire earth. The resulting computer program will be applied to the study of surface wave amplitude variations including geometric focusing and defocusing, laterally heterogeneous anelasticity, and earthquake source directivity. This research is a component of the National Earthquake Hazard Reduction Program.