On 20 April 2013, an Mw 6.6 earthquake struck Lushan, Sichuan province, China (hereafter as Lushan earthquake), which caused 196 deaths and 21 missing. As another disastrous earthquake occurred on the Longmenshan fault after the 2008 Mw 7.9 Wenchuan earthquake, the Lushan earthquake stimulated an extensive discussion about its seismogenesis. In particular, whether it was a large aftershock of the 2008 Mw 7.9 Wenchuan earthquake has been heatedly debated (Chen et al., 2013; Du et al., 2013; Liu, Yi, et al., 2013; Wang et al., 2013; Jia et...

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