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Relocation of the Wenchuan M_S8.0 Earthquake Sequence

Yuan Gao

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Abstract

From the origin time of May 12,2008,MS8.0 Wenchuan earthquake to Dec.31,2008,more than 10 000 aftershocks(M≥2.0) had been recorded by the seismic network in Sichuan and the surrounding provinces.In the paper,the main shock and more than 7 000 aftershocks were relocated using the double difference algorithm.The results show that the length of aftershock distribution is about 350 km.In the southwest,the distribution of aftershocks is along the Back-range,the Central and the Front-range of the Longmenshan fault.In the middle,the distribution of aftershocks is along the Central fault.In the North,the aftershocks distributed across the Qingchuanr-Pingwu fault.The depths of aftershocks mainly located in the 10~20 km,and the average depth of aftershocks is 13 km after relocation.

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What this paper is about

From the origin time of May 12,2008,MS8.0 Wenchuan earthquake to Dec.31,2008,more than 10 000 aftershocks(M≥2.0) had been recorded by the seismic network in Sichuan and the surrounding provinces.In the paper,the main shock and more than 7 000 aftershocks were relocated using the double difference algorithm.The results show that the length of aftershock distribution is about 350 km.In the southwest,the distribution of aftershocks is along the Back-range,the Central and the Front-range of the Longmenshan fault.In the middle,the distribution of aftershocks is along the Central fault.In the North,the aftershocks distributed across the Qingchuanr-Pingwu fault.The depths of aftershocks mainly located in the 10~20 km,and the average depth of aftershocks is 13 km after relocation.

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Available abstract

From the origin time of May 12,2008,MS8.0 Wenchuan earthquake to Dec.31,2008,more than 10 000 aftershocks(M≥2.0) had been recorded by the seismic network in Sichuan and the surrounding provinces.In the paper,the main shock and more than 7 000 aftershocks were relocated using the double difference algorithm.The results show that the length of aftershock distribution is about 350 km.In the southwest,the distribution of aftershocks is along the Back-range,the Central and the Front-range of the Longmenshan fault.In the middle,the distribution of aftershocks is along the Central fault.In the North,the aftershocks distributed across the Qingchuanr-Pingwu fault.The depths of aftershocks mainly located in the 10~20 km,and the average depth of aftershocks is 13 km after relocation.

Key concepts: Aftershock, Geology, Seismology, Relocation, Fault (geology), Programming language, Computer science

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