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The Study on the Strong Ground Motion Attenuation Relationship in the Pishan Area, Xinjiang Uygur Autonomous Region
Li Wenqian,Tao Zhengru,Wei Bin,He Jingang
Author NameAffiliationE-mail
Li Wenqian Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China  
Tao Zhengru Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China taozr@ foxmail.com 
Wei Bin Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China  
He Jingang Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China  
摘要:
Small earthquake data from the Pishan MS6.5 aftershocks is collected by the Xinjiang Regional Digital Seismic Observation Network. Five parameters of the focal region are obtained by micro genetic inversion:stress drop Δσ of 75.95 bars, quality factor parameters Q0 of 186.33 and η of 0.26, geometric attenuation parameters R1 of 72.18km and R2 of 139.70km. We calculate the Fourier spectrum and combine it with the random phase spectrum to get the ground motion time history, and build the strong motion acceleration attenuation relationship. The strong ground motion acceleration attenuation of the Pishan area is thus obtained. Because of the insufficiency of strong ground motion records, we added the records from the Wuqia MS6.9 earthquake on October 5, 2008, the Akto MS6.2 earthquake on October 6, 2008, and the Lop MS6.0 earthquake on March 9, 2012 to the data. The comparison of the calculation results and the empirical attenuation relationships with strong ground motion records reveal that the strong motion data of Pishan and Lop earthquakes is higher than the empirical attenuation relationships. The Wuqia MS6.9 earthquake strong motion data is consistent with Yu Yanxiang's (2013) short axis result, and lower than the present result.
关键词:  Small earthquake data  Parameters of focal region  Micro genetic inversion  Ground motion acceleration attenuation relationship
DOI:
分类号:
基金项目:This project was jointly sponsored by "The Ground Motion Attenuation Relationship Based on Seismology and Its Practicability" of the National Natural Science Foundation of China (51178434) "With Digital Ride Network Small Earthquake Records to Establish Regional Strong Ground Motion Attenuation Relations" from the National Natural Science Foundation of China(51478443) and "Based on the Regional Parameters of Mixed Ground Motion Attenuation Relationship" from the National Natural Science Foundation of China (51678540).
The Study on the Strong Ground Motion Attenuation Relationship in the Pishan Area, Xinjiang Uygur Autonomous Region
Li Wenqian,Tao Zhengru,Wei Bin,He Jingang
Abstract:
Small earthquake data from the Pishan MS6.5 aftershocks is collected by the Xinjiang Regional Digital Seismic Observation Network. Five parameters of the focal region are obtained by micro genetic inversion:stress drop Δσ of 75.95 bars, quality factor parameters Q0 of 186.33 and η of 0.26, geometric attenuation parameters R1 of 72.18km and R2 of 139.70km. We calculate the Fourier spectrum and combine it with the random phase spectrum to get the ground motion time history, and build the strong motion acceleration attenuation relationship. The strong ground motion acceleration attenuation of the Pishan area is thus obtained. Because of the insufficiency of strong ground motion records, we added the records from the Wuqia MS6.9 earthquake on October 5, 2008, the Akto MS6.2 earthquake on October 6, 2008, and the Lop MS6.0 earthquake on March 9, 2012 to the data. The comparison of the calculation results and the empirical attenuation relationships with strong ground motion records reveal that the strong motion data of Pishan and Lop earthquakes is higher than the empirical attenuation relationships. The Wuqia MS6.9 earthquake strong motion data is consistent with Yu Yanxiang's (2013) short axis result, and lower than the present result.
Key words:  Small earthquake data  Parameters of focal region  Micro genetic inversion  Ground motion acceleration attenuation relationship