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运用地震破裂过程快速反演方法,在2009年10月7日瓦努阿图地震发生后,采用全球地震台网(GSN)的宽频带地震资料,快速反演了这次地震的破裂过程,在震后3小时内得出了这次地震破裂过程的反演结果.结果表明,这次瓦努阿图地震的破裂过程具有如下基本特征:①矩震级约为MW7.8;②地震主要破裂持续时间约为80s;③滑动量在断层面上的分布比较简单,整个地震破裂只包含一个滑动量较大的区域;④这次地震的破裂模式接近圆盘破裂,其中心位于震源处.
Using the fast inversion method of seismic rupture, the broadband seismic data of the Global Seismograph Network (GSN) were used to quickly retrieve the earthquake rupture process after the Vanuatu earthquake on October 7, 2009. After the earthquake 3 The results show that the rupture process of this Vanuatu earthquake has the following basic features: (1) the moment magnitude is about MW7.8; (2) the main rupture duration of the earthquake is about 80s; (3) The distribution of slip in the fault plane is relatively simple, and the entire earthquake rupture contains only a region with large slip. (4) The rupture mode of this earthquake is close to the rupture of the disk with its center located at the source.