| Seismic motion attenuation relations in Si-chuan and adjacent areas |
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| 作者姓名： | 雷建成 高孟潭 俞言详 |
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| 作者单位： | Institute of Geophysics China Earthquake Administration，Institute of Geophysics China Earthquake Administration，Institute of Geophysics China Earthquake Administration，Beijing 100081 China Earthquake Administration of Sichuan Province Chengdu 610041 China，Beijing 100081 China，Beijing 100081 China |
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| 基金项目： | Foundation item： National Key Technologies Research and Development Program （2006BAC13B01-0604） and Social Welfare Research Program from Ministry of Science and Technology of China （2005DIB3J119）. .Contribution No.07FE1015, Institute of Geophysics, China Earthquake Administration. Acknowledgements The authors thank PU Xiao-hong, HUANG Wei, YAN Cun-hou and KANG Chuan-chuan for their beneficial contribution to this paper. |
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| 摘 要： | The Sichuan and adjacent areas is divided into southwest China region (SWCR) and Sichuan Basin region (SCBR) according to tectonic backgrounds and seismic damage distribution features. 96 modern destructive earthquakes in SWCR and 40 in SCBR are gathered respectively. All their magnitude parameters are checked. Based on the statis-tic relations between epicentral intensity and magnitude as well as relation between sensible radius and magnitude, the near and far field seismic intensity attenuation features are represented and controlled. And then the seismic intensity attenuation relations along major axis, minor axis and mean axis are established separately. The system-atic deviations of surface wave magnitude between China seismograph network and U.S. seismograph network are considered in this paper. By making use of the new attenuation relations of bedrock horizontal ground acceleration response spectrum in west U.S., the attenuation relations of bedrock horizontal ground acceleration response spec-trum in SWCR and SCBR are digital transformed based on the attenuation model considering acceleration satura-tion of distance and magnitude in near field.
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| 关 键 词： | 中国 西南地区 四川盆地 地震 强度 |
| 文章编号： | 1000-9116（2007）05-0532-12 |
| 收稿时间： | 8 February 2007 |
| 修稿时间： | 2007-02-08 |
Seismic motion attenuation relations in Sichuan and adjacent areas |
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| Lei Jian-cheng , Gao Meng-tan and Yu Yan-xiang.Seismic motion attenuation relations in Si-chuan and adjacent areas[J].Acta Seismologica Sinica(English Edition),2007,20(5):532-543. |
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| Authors: | Lei Jian-cheng Gao Meng-tan and Yu Yan-xiang |
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| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China; 2. Earthquake Administration of Sichuan Province, Chengdu 610041, China |
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| Abstract: | The Sichuan and adjacent areas is divided into southwest China region (SWCR) and Sichuan Basin region (SCBR) according to tectonic backgrounds and seismic damage distribution features. 96 modern destructive earthquakes in SWCR and 40 in SCBR are gathered respectively. All their magnitude parameters are checked. Based on the statis- tic relations between epicentral intensity and magnitude as well as relation between sensible radius and magnitude, the near and far field seismic intensity attenuation features are represented and controlled. And then the seismic intensity attenuation relations along major axis, minor axis and mean axis are established separately. The system- atic deviations of surface wave magnitude between China seismograph network and U.S. seismograph network are considered in this paper. By making use of the new attenuation relations of bedrock horizontal ground acceleration response spectrum in west U.S., the attenuation relations of bedrock horizontal ground acceleration response spec- trum in SWCR and SCBR are digital transformed based on the attenuation model considering acceleration satura- tion of distance and magnitude in near field. |
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| Keywords: | southwest China region (SWCR) Sichuan Basin region (SCBR) seismic intensity ground ac-celeration attenuation |
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