利用区域水准测量资料判定地震危险区
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摘要
利用中国西部地区２０多年的水准测量资料，用富氏分析法分离地壳垂直形变信息，进而计算了测区的垂直形变场分数维，并分析了它在孕震过程中的变化特征。结果表明，区域垂直形变场分数维在地震前下降，同震时段降至最低。在此基础上，提出了划分地震危险区的判据，并结合实例介绍了计算方法和步骤
Based on the data of the leveling in Western China for twenty years, the information of vertical crust deformation is separated by use of the Furier-analysis method. Accordingly, the fractal of the vertical deformation in the area is calculated and its varying feature in the seismogenic process is analyzed. The results show that the fractal reduces before an earthquake and is minimum during earthquake, according to which the criterion of dividing seismic risk is put forward. Finally, the computational method and qteps are described with some examples.
Based on the data of the leveling in Western China for twenty years, the information of vertical crust deformation is separated by use of the Furier-analysis method. Accordingly, the fractal of the vertical deformation in the area is calculated and its varying feature in the seismogenic process is analyzed. The results show that the fractal reduces before an earthquake and is minimum during earthquake, according to which the criterion of dividing seismic risk is put forward. Finally, the computational method and qteps are described with some examples.
引文
1黄立人．由复测精密水准用富氏分析法提取地壳垂直运动信息可能性的探讨．测绘学报，1990，19（4）：257～266．2陈，等．分形与混沌在地球科学中的应用．学术期刊出版社，1989．3周硕愚，吴云，王若柏，等．地震蕴育过程中地壳形变场图象动力学参量的研究．地震学报，1994，16（3）：336～340．4石特林，等编．河西祁连山中段地震危险基础研究．北京：地震出版社，1994，5张伯宏，刘天铭．地壳波浪运动与中国西部地震迁移———以河西—祁连山地区为例．高原地震，1995，7（4）：24～30．
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