西北地震学报2012，Vol.34Issue(1)：99-104,6.
2008年汶川地震后的三次强余震地表峰值加速度衰减场研究
Study on PGA Attenuation of Three Strong Aftershocks of 2008 Wenchuan Earthquake
摘要
Abstract
Using the data of three strong aftershocks after the 2008 Wenchuan earthquake recorded by Gansu strong motion stations, the free field acceleration attenuation in southern Gansu province are studied. The attenuation of Peak Ground Acceleration [PGA) with the epicentral distance follows the exponential law, and the forms of attenuation are parallel. However, the attenuation index of three strong aftershocks also has some differences. The condition of the strong motion stations has certain influence to ground motion intensity and frequency spectrum. So further research to get the universal attenuation law of strong earthquakes in southern Gansu province is needed.关键词
汶川地震强余震/强震动/峰值加速度/衰减场Key words
Strong aftershocks of Wenchuan great earthquake/ Strong motion/ Peak acceleration/ Attenuation field分类
天文与地球科学引用本文复制引用
姚凯,孙崇绍,朱珊珊,刘旭宙..2008年汶川地震后的三次强余震地表峰值加速度衰减场研究[J].西北地震学报,2012,34(1):99-104,6.基金项目
中国地震局预测研究所基本科研业务专项A80 （）
中国地震局业务专项:甘肃省强震动台网运行与维护 （）
中国地震局兰州地震研究所论著编号:LC2011048 （）
