Estimation of Recurrence Interval of Large Earthquakes on the Central Longmen Shan Fault Zone Based on Seismic Moment Accumulation/Release Model

Figure 1

Tectonic settings and aftershock sequence of the 2008 Wenchuan earthquake. Surface rupture is modified from [4]; focal mechanisms are from USGS; aftershock sequence is from relocated results [28]. Borders of fault model are according to GPS and InSAR inversion [6]. Trench sites are from published results [12–14]. White circles are place names: BC, Beichuan county; BL, Bailu town; DJY, Dujiangyan city, LG, Leigu town; MX, Maoxian county; QC, Qingchuan county; QP, Qingping town; WC, Wenchuan county; XYD, Xiaoyudong town; YX, Yingxiu town. Black solid lines are known faults: YBF, Yingxiu-Beichuan fault; GJF, Guanxian-Jiangyou fault; WMF, Wenchuan-Maoxian fault; QCF, Qingchuan fault; MSF, Minshan fault; HYF, Huya fault. Insert map shows the topography of the Tibetan plateau. Inset map shows major tectonics in the Longmen Shan vicinity: ATF, Altyn Tagh fault; HF, Haiyuan fault; JLF, Jiali fault; KF, Kunlun fault; RF, Red River fault; XF, Xiaoshuihe fault; I, Qaidam-Qilian block; II, Bayan Har block; III, Sichuan-Yunan block. Black arrows indicate block motion direction.