A rupture blank zone in middle south part of Longmenshan Faults: Effect after Lushan M (s)7.0 earthquake of 20 April 2013 in Sichuan, China

作者：Gao Yuan^*; Wang Qiong; Zhao Bo; Shi YuTao

来源：Science China Earth Sciences, 2014, 57(9): 2036-2044.

DOI：10.1007/s11430-014-4827-2

• Lushan earthquake
• Longmenshan Fault
• rupture gap
• crustal seismic anisotropy
• double difference relocation
• borehole measurements of stress change

On April 20, 2013, the Lushan M (s)7.0 earthquake struck at the southern part of the Longmenshan fault in the eastern Tibetan Plateau, China. The shear-wave splitting in the crust indicates a connection between the direction of the principal crustal compressive stress and the fault orientation in the Longmenshan fault zone. Our relocation analysis of the aftershocks of the Lushan earthquake shows a gap between the location of the rupture zone of the Lushan M (s)7.0 earthquake and that of the rupture zone of the Wenchuan M (s)8.0 earthquake. We believe that stress levels in the crust at the rupture gap and its vicinity should be monitored in the immediate future. We suggest using controlled source borehole measurements for this purpose.

• 出版日期2014-9
• 单位中国地震台网中心; 中国地震局地震预测研究所