Study on PGA Attenuation of Three Strong Aftershocks of 2008 Wenchuan Earthquake
详细信息
- 责任者：Yao Kai (Lanzhou Institute of Seismology ; CEA ; Lanzhou 730000 ; China) ; Sun Chongshao
- 刊名：Northwestern Seismological Journal
- 出版年：2012
- 卷期：34(1)
- 关键词：余震 ; aftershocks ; 汶川地震2008 ; Wenchuan earthquake 2008 ; 四川 ; Sichuan Province ; 甘肃 ; Gansu Province
- 页码：p.99-104
- 图表：7 illus., 2 tables, 5 refs.
- 分类号：0500
- issnNo：ISSN1000-0844
- isbnNo：CN62-1048/P
摘要
Using the data of three strong aftershocks after Wenchuan earthquake 2008 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 on ground motion intensity and frequency spectrum.
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