合成理论地震图方法综述

Review of synthetic seismogram calculation methods

合成理论地震图对震源和地下结构的研究而言是一项重要的基础工作.一直以来,诸多地震学领域的先驱们都致力于合成理论地震图的方法发展与改进,是一个愈久弥新的研究课题.同时,经过很多非常有影响力的地震学家的发展,合成理论地震图的方法种类变得多种多样.本文全面而深入地总结合成理论地震图的不同理论、不同方法所具有的优势与不足,并讨论各种理论地震图计算方法的研究进展.以期为理论地震图计算方法的发展以及在实际应用中选择合适的方法提供有价值的参考.经过对比研究,我们得到以下三点认识:(1)在解析类方法中,波数积分法在使用上不区分局部或全球尺度、计算精确且为全波形模拟,因此适用性更为广泛;(2)在数值类方法中,谱元法在适用性和计算效率上是一种最受欢迎且最精确的计算方法;(3)根据不同的需求采用不同方法相结合的混合计算方法是较好的选择.

The synthetic seismogram calculation is a very important basic work for seismic source research and Earth’ structure inversion. For a long time, many pioneers of seismology have devoted themselves to the development and improvement of the synthetic seismograms calculation method. At the same time, after the development by many very influential seismologists, there are various synthesizing-seismogram methods. This article comprehensively and deeply summarizes the advantages and disadvantages of different theories and methods, and discusses the development of various theoretical seismogram calculation methods, which provides a valuable reference for the development and application of theoretical seismogram calculation methods. Through comparative study, we obtained the following three understandings:(1) for analytical methods, the wavenumber integration method is more widely used, due to the advantages of undistinguishing between local and global dimension, accurate calculation and full waveform simulation.(2) Among numerical methods, spectral element method is one of the most popular and accurate calculation methods in terms of applicability and calculation efficiency.(3) According to different requirements, the hybrid calculation method combining different methods is a better choice.