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The NE Directed Seismicity Belt in Tibet after the MS8.1 Nepal Earthquake and Its Predictive Significance
Wang Shuangxu,Zhu Liangyu,Xu Jing,Ji Lingyun,Jiang Fengyun
作者单位
Wang Shuangxu The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
Zhu Liangyu The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
Xu Jing The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
Ji Lingyun The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
Jiang Fengyun The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
摘要:
After the 2015 MS8.1 Nepal earthquake, a strong and moderate seismicity belt has formed in Tibet gradually spreading along the northeast direction. In this paper, we attempt to summarize the features and investigate the primary mechanism of this behavior of seismic activity, using a 2-D finite element numerical model with tectonic dynamic settings and GPS horizontal displacements as the constraints. In addition, compared with the NE-trending seismicity belt triggered by the 1996 Xiatongmoin earthquake, we discuss the future earthquake hazard in and around Tibet. Our results show that:the NE-directed seismicity belt is the response of enhanced loading on the anisotropic Qinghai-Tibetan plateau from the Indian plate and earthquake thrusting. Also, this possibly implies that a forthcoming strong earthquake may fill in the gaps in the NE-directed seismicity belt or enhance the seismic hazard in the eastern (the north-south seismic zone) and western (Tianshan tectonic region) parts near the NE-directed belt.
关键词:  The 2015 MS8.1 Nepal earthquake  Qinghai-Tibetan plateau  NE-directed seismicity belt predictive significance
DOI:
分类号:
基金项目:This paper is funded by China Comprehensive Geophysical Field Observation in North China of Earthquake Scientific Research (201508009).
The NE Directed Seismicity Belt in Tibet after the MS8.1 Nepal Earthquake and Its Predictive Significance
Wang Shuangxu,Zhu Liangyu,Xu Jing,Ji Lingyun,Jiang Fengyun
Abstract:
After the 2015 MS8.1 Nepal earthquake, a strong and moderate seismicity belt has formed in Tibet gradually spreading along the northeast direction. In this paper, we attempt to summarize the features and investigate the primary mechanism of this behavior of seismic activity, using a 2-D finite element numerical model with tectonic dynamic settings and GPS horizontal displacements as the constraints. In addition, compared with the NE-trending seismicity belt triggered by the 1996 Xiatongmoin earthquake, we discuss the future earthquake hazard in and around Tibet. Our results show that:the NE-directed seismicity belt is the response of enhanced loading on the anisotropic Qinghai-Tibetan plateau from the Indian plate and earthquake thrusting. Also, this possibly implies that a forthcoming strong earthquake may fill in the gaps in the NE-directed seismicity belt or enhance the seismic hazard in the eastern (the north-south seismic zone) and western (Tianshan tectonic region) parts near the NE-directed belt.
Key words:  The 2015 MS8.1 Nepal earthquake  Qinghai-Tibetan plateau  NE-directed seismicity belt predictive significance