| Comparison of the spatial distribution of ground motion between main shocks and strong aftershocks |
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| 作者姓名： | 吕晓健 高孟潭 高战武 米素婷 |
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| 作者单位： | Institute of Geophysics China Earthquake Administration，Institute of Geophysics China Earthquake Administration，Institute of Earthquake Science China Earthquake Administration，Institute of Earthquake Science China Earthquake Administration，Beijing 100081 China，Institute of Earthquake Science China Earthquake Administration，Beijing 100036 China，Beijing 100081 China，Beijing 100036 China，Beijing 100036 China |
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| 基金项目： | Department of Science and Technology Important International Cooperate Subject (2004DFA06000)，Joint seis-mological Science Foundation of China (604025). |
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| 摘 要： | Using the ground motion attenuation relation, we calculated and compared the effective peak acceleration (EPA) generated by main shocks and their strong aftershocks of 21 earthquake sequences with MS≥7 occurred in Chinese mainland and offing of China during 1966~2002. The result shows that EPA of strong aftershocks usually exceed that of main shock for 76.2% earthquake sequences and EPA of more than 50% strong aftershocks are greatly lar-ger than that of main shocks in large area, which suggests that it is necessary to take damage produced by strong aftershock into account in the probabilistic seismic hazard analysis and the seismic design.
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| 关 键 词： | 主震 强余震 地面运动 空间分布 比较分析 |
| 文章编号： | 1000-9116（2007）03-0312-07 |
| 收稿时间： | 2006-12-25 |
| 修稿时间： | 2007-04-16 |
Comparison of the spatial distribution of ground motion between main shocks and strong aftershocks |
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| Lü Xiao-jian , Gao Meng-tan , Gao Zhan-wu and Mi Su-ting.Comparison of the spatial distribution of ground motion between main shocks and strong aftershocks[J].Acta Seismologica Sinica(English Edition),2007,20(3):312-318. |
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| Authors: | Lü Xiao-jian Gao Meng-tan Gao Zhan-wu and Mi Su-ting |
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| Institution: | (1) Institute of Geophysics, China Earthquake Administration, Beijing, 100081, China;(2) Institute of Earthquake Science, China Earthquake Administration, Beijing, 100036, China |
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| Abstract: | Using the ground motion attenuation relation, we calculated and compared the effective peak acceleration (EPA) generated by
main shocks and their strong aftershocks of 21 earthquake sequences with M
S≥7 occurred in Chinese mainland and offing of China during 1966∼2002. The result shows that EPA of strong aftershocks usually
exceed that of main shock for 76.2% earthquake sequences and EPA of more than 50% strong aftershocks are greatly larger than
that of main shocks in large area, which suggests that it is necessary to take damage produced by strong aftershock into account
in the probabilistic seismic hazard analysis and the seismic design.
Contribution No.07FE3007, Institute Geophysics, China Earthquake Administration. |
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| Keywords: | strong aftershock effective peak acceleration seismic design |
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