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Relocation of the Jinghe MS6.6 Earthquake Sequence on August 9, 2017 and Analysis of the Seismogenic Structure
Liu Jianming, Gao Rong, Wang Qiong, Nie Xiaohong
Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China
摘要:
Based on the digital waveforms of the Xinjiang Digital Seismic Network, the Jinghe MS6.6 earthquake sequence (ML ≥ 1.0) were relocated by HypoDD, The characteristics of the spatial distribution and the seismogenic structure of this earthquake sequence were analyzed. The results show that the main shock is relocated at 44.2639°N, 82.8294°E, and the initial rupture depth is 17.6km. The earthquake sequence clearly demonstrates a unilateral extension of about 20km in the EW direction, and is mainly located at a depth of 7km-17km. The depth profile along the aftershock direction shows that the focal depth of aftershocks tend to be shallower within 10km to the west of the main shock, the focal depth of the aftershock sequence with the tail direction deflecting SW is deeper. The depth profile perpendicular to the earthquake sequence shows a gradual deepening of the seismic sequence from north to south, which indicates that the fault plane is dipping south. According to the focal mechanism solution, given by the Institute of Geophysics, China Earthquake Administration, and the geological structure of the seismic source region, it is inferred that the seismogenic structure of the Jinghe MS6.6 earthquake may be the eastern segment of the Kusongmuxieke fault.
关键词:  Jinghe MS6.6 earthquake  HypoDD location  Seismogenic structure  Kusongmuxieke fault
DOI:
分类号:
基金项目:This project was jonity funded by the Scientific Research Project of Jinghe MS6.6 Earthquake-Anatomy of Jinghe MS6.6 Earthquake and Strong Earthquake Trend Following and Prediction in Northern Tianshan Mountains, Institute of Earthquake Forecasting,CEA (1747074512), the National Natural Science Foundation of China (41672208) and Science for Earthquake Resilience (XH17043Y) and Science Fund for Earthquake Agency of XinJiang Uygur Autonomous Region(201705).
Relocation of the Jinghe MS6.6 Earthquake Sequence on August 9, 2017 and Analysis of the Seismogenic Structure
Liu Jianming, Gao Rong, Wang Qiong, Nie Xiaohong
Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China
Abstract:
Based on the digital waveforms of the Xinjiang Digital Seismic Network, the Jinghe MS6.6 earthquake sequence (ML ≥ 1.0) were relocated by HypoDD, The characteristics of the spatial distribution and the seismogenic structure of this earthquake sequence were analyzed. The results show that the main shock is relocated at 44.2639°N, 82.8294°E, and the initial rupture depth is 17.6km. The earthquake sequence clearly demonstrates a unilateral extension of about 20km in the EW direction, and is mainly located at a depth of 7km-17km. The depth profile along the aftershock direction shows that the focal depth of aftershocks tend to be shallower within 10km to the west of the main shock, the focal depth of the aftershock sequence with the tail direction deflecting SW is deeper. The depth profile perpendicular to the earthquake sequence shows a gradual deepening of the seismic sequence from north to south, which indicates that the fault plane is dipping south. According to the focal mechanism solution, given by the Institute of Geophysics, China Earthquake Administration, and the geological structure of the seismic source region, it is inferred that the seismogenic structure of the Jinghe MS6.6 earthquake may be the eastern segment of the Kusongmuxieke fault.
Key words:  Jinghe MS6.6 earthquake  HypoDD location  Seismogenic structure  Kusongmuxieke fault