1 National Earthquake Infrastructure Service, China Earthquake Administration, Beijing 100036, China 2 Earthquake Administration of Yunnan Province, Kunming 650224, China 3 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
Ground motion attenuation of MS8.0 Wenchuan earthquake
1 National Earthquake Infrastructure Service, China Earthquake Administration, Beijing 100036, China 2 Earthquake Administration of Yunnan Province, Kunming 650224, China 3 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
摘要The great MS8.0 Wenchuan earthquake has been the most destructive earthquake since 1949 in China. The earthquake occurred no more than half a year after the establishment of the National Strong Motion Observation Network System (NSMONS) of China; what is more, the epicenter was located in the area with dense strong motion observation stations so that a large number of strong motion records of the main shock were obtained. In this paper, 501 strong motion records from 167 observation stations are utilized to establish the ground motion attenuation relations in three directions in the range of fault distance less than 600 km. The result shows the difference of seismic motion attenuation in two horizontal directions is insignificant. It is the first time that strong-motion records are used to establish the ground motion attenuation relations of the MS8.0 earthquake in China.
Abstract：The great MS8.0 Wenchuan earthquake has been the most destructive earthquake since 1949 in China. The earthquake occurred no more than half a year after the establishment of the National Strong Motion Observation Network System (NSMONS) of China; what is more, the epicenter was located in the area with dense strong motion observation stations so that a large number of strong motion records of the main shock were obtained. In this paper, 501 strong motion records from 167 observation stations are utilized to establish the ground motion attenuation relations in three directions in the range of fault distance less than 600 km. The result shows the difference of seismic motion attenuation in two horizontal directions is insignificant. It is the first time that strong-motion records are used to establish the ground motion attenuation relations of the MS8.0 earthquake in China.
基金资助:Earthquake Research Foundation of China Earthquake Administration (No. C08043), and by Social Development Plan Foundation of Yunnan Province (2007CA002)
