Abstract This paper uses the horizontal GPS velocity field of the Chinese continent in 1998～2007 and 2009～2017 years as constraints. Based on the block-dislocation model, we study the movement characteristics of the Honghe fault before and after the 2008 Wenchuan earthquake. The results show that after the Wenchuan earthquake, the average right-lateral strike-slip rate of the Honghe fault is about 4.5 mm/a, and the strike-slip rate of the northern segment increases obviously, the strike-slip rate of the middle segment increases slightly, the strike-slip rate of the southern segment decreases obviously. The dip-slip rate on the northern segment of the Honghe fault decreases obviously, the middle and southern segments decrease slightly.After the Wenchuan earthquake, the locking and slip deficit on the northern segment of the Honghe fault increases slightly and the middle segment is the same, while the locking and slip deficit on the southern segment decreases significantly. Recently, the slip deficit on the northern segment of the Honghe fault is about 10 mm/a, the slip deficit on the middle segment is also 5～8 mm/a, and the average locking depth is about 20 km.The analysis suggests the impact of Wenchuan earthquake on the northern segment and the middle segment of the Honghe fault is relatively small, which has a great influence on its southern segment.
LU Xiaofei,TAN Kai,ZHAO Bin et al. Research on Fault Locking and Fault Slip Deficit of the Honghe Fault before and after Wenchuan Earthquake[J]. jgg, 2019, 39(5): 464-468.
LU Xiaofei,TAN Kai,ZHAO Bin et al. Research on Fault Locking and Fault Slip Deficit of the Honghe Fault before and after Wenchuan Earthquake[J]. jgg, 2019, 39(5): 464-468.
