三峡水库巴东地区的介质变化分析
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摘要
利用天然重复地震观测水库介质速度随时间的变化,采用射线追踪方法对三峡巴东地区的重复地震进行位置归一化处理提高观测精度。计算了巴东地区2004年5月至2009年10月ML≥2.0重复地震经射线追踪法校正后的P波走时差。结果表明,巴东地区的介质速度变化主要受三峡库水位的载荷变化以及库水渗透作用影响。
In this paper the authors monitor reservoir media variation with time by using repeated earthquakes, normalize the position of repeated earthquakes by using ray tracing to improve the precision, and also calculate the travel time of Badong repeated earthquakes(ML≥2.0) from May 2004 to October 2009 by using ray tracing.The results indicate the velocity variation of crustal media may be influenced by water load and infiltration of Three Gores Reservoir.
In this paper the authors monitor reservoir media variation with time by using repeated earthquakes, normalize the position of repeated earthquakes by using ray tracing to improve the precision, and also calculate the travel time of Badong repeated earthquakes(ML≥2.0) from May 2004 to October 2009 by using ray tracing.The results indicate the velocity variation of crustal media may be influenced by water load and infiltration of Three Gores Reservoir.
引文
[1]中国地震局监测预报司.地震学与地震观测[M].北京:地震出版社,2007:157-158.(The monitoring and forecasting department of China Earthquake Administra-tion.Seismology and Earthquake Observation[M].Bei-jing:Earthquake Press,2007:157-158.(in Chinese))
[2]陈运泰,吴忠良,王培德,等.数字地震学[M].北京:地震出版社,2000.(CHEN Yun-tai,WU Zhong-liang,WANG Pei-dei,et al.Digital Seismology[M].Beijing:Earthquake Press,2000.(in Chinese))
[3]周龙泉,刘桂萍,马宏生,等.利用重复地震观测地壳介质变化[J].地震,2007,27(3):1-9.(ZHOU Long-quan,LIU Gui-ping,MA Hong-sheng,et al.Monitoring crustal media variation by using repeating earthquakes[J].Earthquake,2007,27(3):1-9.(in Chinese))
[4]叶秀薇,闻则刚,刘锦,等.利用重复地震研究广东阳江地区地壳介质变化[J].地震,2008,28(4):103-111.(YE Xiu-wei,WENZe-gang,LIUJin,et al.Moni-toring crustal media variation in Yangjiang area of Guang-dong provinces by using repeated earthquakes[J].Earth-quake,2008,28(4):103-111.(in Chinese))
[5]POUPINET G,ELLSWORTH W L,FRECHET J.Moni-toring velocity variations in the crust using earthquake doublets:an application to the Calaveras Fault,California[J].Geophys Res.,1984,89(B7):5719-5731.
[6]UM J,THURBER C H.A fast for two-point seismic tracing[J].Bull Seism Soc Amer,1987,77(3):972-986.
[7]赵旭,李强,蔡晋安.三峡库首区最小一维速度模型研究[J].大地测量与地球动力学,2007,27(增1):1-7.(ZHAO Xu,LI Qiang,CAI Jin-an.On minimum1D velocity model applied in Three Georges Reservoir area[J].Journal of Geodesy and Geodaynamics,2007,27(S1):1-7.(in Chinese))
[8]施行觉,徐果明,靳平,等.岩石的含水饱和度对纵、横波速及衰减影响的实验研究[J].地球物理学报,1995,38:281-287.(SHI Xing-jue,XU Guo-min,JIN Ping,et al.The laboratory study of influence of water sat-uration on rock's velocity and attenuation[J].ACTAGeo-physica Sinica,1995,38:281-287.(in Chinese))
[9]史謌,沈联蒂.灰岩含水饱和度对纵横波速度影响的实验研究[J].石油地球物勘探,1990,25(4):469-479.(SHI Ge,SHEN Lian-di.Experimental study of how water saturation in limestone influences the velocities of P-wave and S-wave[J].Oil Geophysical Prospecting,1990,25(4):469-479.(in Chinese))
[2]陈运泰,吴忠良,王培德,等.数字地震学[M].北京:地震出版社,2000.(CHEN Yun-tai,WU Zhong-liang,WANG Pei-dei,et al.Digital Seismology[M].Beijing:Earthquake Press,2000.(in Chinese))
[3]周龙泉,刘桂萍,马宏生,等.利用重复地震观测地壳介质变化[J].地震,2007,27(3):1-9.(ZHOU Long-quan,LIU Gui-ping,MA Hong-sheng,et al.Monitoring crustal media variation by using repeating earthquakes[J].Earthquake,2007,27(3):1-9.(in Chinese))
[4]叶秀薇,闻则刚,刘锦,等.利用重复地震研究广东阳江地区地壳介质变化[J].地震,2008,28(4):103-111.(YE Xiu-wei,WENZe-gang,LIUJin,et al.Moni-toring crustal media variation in Yangjiang area of Guang-dong provinces by using repeated earthquakes[J].Earth-quake,2008,28(4):103-111.(in Chinese))
[5]POUPINET G,ELLSWORTH W L,FRECHET J.Moni-toring velocity variations in the crust using earthquake doublets:an application to the Calaveras Fault,California[J].Geophys Res.,1984,89(B7):5719-5731.
[6]UM J,THURBER C H.A fast for two-point seismic tracing[J].Bull Seism Soc Amer,1987,77(3):972-986.
[7]赵旭,李强,蔡晋安.三峡库首区最小一维速度模型研究[J].大地测量与地球动力学,2007,27(增1):1-7.(ZHAO Xu,LI Qiang,CAI Jin-an.On minimum1D velocity model applied in Three Georges Reservoir area[J].Journal of Geodesy and Geodaynamics,2007,27(S1):1-7.(in Chinese))
[8]施行觉,徐果明,靳平,等.岩石的含水饱和度对纵、横波速及衰减影响的实验研究[J].地球物理学报,1995,38:281-287.(SHI Xing-jue,XU Guo-min,JIN Ping,et al.The laboratory study of influence of water sat-uration on rock's velocity and attenuation[J].ACTAGeo-physica Sinica,1995,38:281-287.(in Chinese))
[9]史謌,沈联蒂.灰岩含水饱和度对纵横波速度影响的实验研究[J].石油地球物勘探,1990,25(4):469-479.(SHI Ge,SHEN Lian-di.Experimental study of how water saturation in limestone influences the velocities of P-wave and S-wave[J].Oil Geophysical Prospecting,1990,25(4):469-479.(in Chinese))
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