In order to reproduce the rupture history of the 2008 M_w8.0 Wenchuan earthquake, the teleseismic and strong-motion records are adopted. Based on a multiple-segment, variable-slip model, the finite fault inversion method is utilized to recover the rupture process. The results are as follows: (1) the rupture duration of the Wenchuan earthquake is about 100 s, and the released seismic moment is 1.24 × 10²¹ N·m, equal to the moment magnitude M_w8.0. There are 5 asperities on the fault plane, indicating that the earthquake is composed of at least 5 subevents. (2) The slip is mainly distributed on the Beichuan fault, indicating that the Beichuan fault is the main rupture fault. On the southern part of the Beichuan fault, the dislocation underside the Longmenshan area and Hongkou-Yingxiu near-surface area is dominated by thrust, and the maximum slip is 11.8 m. Slip between the Yuejiashan and Qingping area is dominated by thrust. On the northern part of the Beichuan fault, the area under Beichuan is dominated by thrust, the slip under Nanba is thrust and strike, near Qingchuan, the slip turns into the strike slip, and the maximum slip is 13.1 m. The dislocation under Bailu is also dominated by thrust, with maximum slip 8.9 m. (3) The rupture of the Wenchuan earthquake is mainly a unilateral rupture to the northeast. The rupture started at the low dip angle part of the Beichuan fault, and after 3 s, it propagated to the Pengguan fault. After 10 s, the largest asperity under Longmenshan in the south section of the Beichuan fault began to break, lasting for about 24 s. Then, the Xiaoyudong fault was triggered by the Pengguan fault, and the bilateral rupture of the high dip angle part of the Beichuan fault started at about 6 s. South section of the Beichuan fault began to break at about 35 s, and at 43 s, 63 s, and 80 s, the rupture extended to Beichuan, Nanba, and Qingchuan areas.

中文翻译：

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地震和强震记录联合反演估算2008年汶川Mw8.0地震破裂历史

为了重现2008年的历史断裂中号_W¯¯ 8.0汶川地震，远震和强震动记录被采用。基于多段可变滑移模型，利用有限断层反演方法恢复破裂过程。结果如下：（1）汶川地震的破裂持续时间约为100 s，释放的地震矩为1.24×10 ²¹  N·m，等于矩震级M _w8.0。断裂面上有5个凹凸，表明地震至少由5个子事件组成。（2）滑移主要分布在北川断裂上，表明北川断裂是主要的破裂断裂。在北川断裂的南部，龙门山地区和虹口-映秀近地表下方的错位以逆冲作用为主，最大滑移为11.8m。岳家山和青平地区之间的滑动主要受推力作用。在北川断裂的北部，北川下的地区以逆冲为主，南坝下的滑移为逆冲和走动，在青川附近，滑移变为走滑，最大滑移为13.1m。白鹿下的错位也以逆冲作用为主，最大滑移8.9 m。（3）汶川地震的破裂主要是东北方向的单侧破裂。断裂始于北川断层的低倾角部分，3 s后破裂，延伸至彭关断裂。10秒后，北川断裂南段龙门山下最大的隆起开始破裂，持续约24秒。然后，由彭冠断裂触发了小鱼洞断裂，北川断裂高倾角部分的双侧断裂大约在6 s左右开始。北川断裂的南段大约在35 s开始断裂，分别在43 s，63 s和80 s断裂，延伸至北川，南坝和青川地区。北川断裂南段龙门山下最大的隆起开始断裂，持续约24秒。然后，由彭官断裂带触发了小玉洞断裂带，北川断裂带高倾角部分的双侧断裂大约在6 s左右开始。北川断裂的南段大约在35 s开始断裂，分别在43 s，63 s和80 s断裂，延伸至北川，南坝和青川地区。北川断裂南段龙门山下最大的隆起开始断裂，持续约24秒。然后，由彭冠断裂触发了小鱼洞断裂，北川断裂高倾角部分的双侧断裂大约在6 s左右开始。北川断裂的南段大约在35 s开始断裂，分别在43 s，63 s和80 s断裂，延伸至北川，南坝和青川地区。