| Lg coda Q0 value and its relation with the tectonics in Chinese mainland and adjacent regions |
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| 作者姓名： | 苏伟 吴建平 明跃红 王椿镛 |
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| 作者单位： | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| 基金项目： | The Crust and Upper Mantle Digital Structure Project of China and Joint Seismological Science Foundation of China （104060）. Contribution No. 06FE3012, Insititute of Geophysics, China Earthquake Administration. Acknowledgments We are grateful to the data management center of CENC for providing the data. We would like to thank Prof. HUANG Zhong-xian, HE Zhen-qing and Dr. TANG Fang-tou for their valuable suggestions and helps. |
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| 摘 要： | We have collected 432 vertical component records from 45 stations of new CENC （China Earthquake Network Center） in Chinese mainland and adjacent regions. These records were used to calculate Q0 （Q at 1Hz） and η values of Lg coda from each station by the stack spectral ratio （SSR） method. Then the tomography method was applied to obtaining lateral variation of Q0 and η values in Chinese mainland and adjacent regions. The result indicates that Q0 value varies between 150 and 600 in the studied areas. Yunnan, southwest Sichuan, and northwest Myanmar show the lowest Q0 value （Q0〈240） and the crust of these regions is characterized by complicated crack and strong hydrothermal activity. The highest Q0 value （Qo〉510） exists in the border of southern Mongolia, Alxa and Ordos block. The η value varies between 0.45 and 0.75 in Chinese mainland and its adjacent regions.
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| 关 键 词： | 中国 大陆板块 地震波 邻近区域 |
| 文章编号： | 1000-9116（2006）02-0136-09 |
| 收稿时间： | 2004-03-03 |
| 修稿时间： | 2005-03-30 |
Lg coda Q 0 value and its relation with the tectonics in chinese mainland and adjacent regions |
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| SU Wei,WU Jiang-ping,MING Yue-hong,WANG Chun-yong.Lg coda Q0 value and its relation with the tectonics in Chinese mainland and adjacent regions[J].Acta Seismologica Sinica(English Edition),2006,19(2):136-144. |
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| Authors: | SU Wei WU Jiang-ping MING Yue-hong WANG Chun-yong |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | We have collected 432 vertical component records from 45 stations of new CENC (China Earthquake Network Center) in Chinese
mainland and adjacent regions. These records were used to calculate Q
0 (Q at 1Hz) and η values of Lg coda from each station by the stack spectral ratio (SSR) method. Then the tomography method was applied to obtaining
lateral variation of Q
0 and η values in Chinese mainland and adjacent regions. The result indicates that Q
0 value varies between 150 and 600 in the studied areas. Yunnan, southwest Sichuan, and northwest Myanmar show the lowest Q
0 value (Q
0<240) and the crust of these regions is characterized by complicated crack and strong hydrothermal activity. The highest Q
0 value (Q
0>510) exists in the border of southern Mongolia, Alxa and Ordos block. The η value varies between 0.45 and 0.75 in Chinese mainland and its adjacent regions.
Contribution No. 06FE3012, Institute of Geophysics, China Earthquake Administration. |
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| Keywords: | Chinese mainland and adjacent regions Lg coda Q 0 value η value |
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