利用地震波形反演研究震源破裂时空过程

INVESTIGATION OF EARTHQUAKE RUPTURE HISTORIES USING WAVEFORM INVERSION METHOD

本文对近10多年来利用地震波形反演推断震源破裂时空过程这一领域的研究进展作一简单介绍．论述了理论地震图的计算、反演确定震源参数、以及解释反演结果三方面的发展，并对反演结果进行了归纳总结．研究表明，在本文所提到的地震中，多数大地震的震中附近只有相对小的滑动，而在多数中等地震的震中或其附近有较大的滑动．本文认为，在进一步提高反演解答的稳定性和可信程度的基础上，在大地构造背景下研究震源的性质，对一批不同震级、发生在不同构造区的地震进行系统研究是有意义的．

During the last decade, the research work of inferrting source rupture histories bywaveform inversion has been developed rapidly. This paper intends to give a briefreview on this field. The computation of synthetics, inversion for source parameters,and explanation of inversion results were discussed. Some studies show that there aresomewhat small slip near hypocenters of most large earthquakes, otherwise higher slipat or near hypocenters of moderatesized events. given improving the stability andreliability of inversion results, we believe it is significant to study a group of eventswith different magnitudes and different tectonic setting.