摘要
采用富里叶分析法，对宁夏海原５．７级地震和四川道孚６．９级地震的震区垂直形变场的区域性倾斜信息进行分离和提取。上述地震在孕震期和震后，其区域性倾斜的倾向一致；而发震期的区域性倾斜不同于孕震期和震后，其倾向有一定偏转。
Using the Fourier analysis the information of regional tilt which are relatedl to Haiyuan and Daofu earthquekes(M5.7 and 6.9 respectively).is separated and extracted from vertical deformation of near field in seismic area. It Is shown that the directions of the vertical deformation fields in these seismic areas during seismogenic stage,agree with those after events.But the direction in the time when earthquake occured are different from those above mentioned.And all of the directions agree with outside force on the crust of the China continent.
出处
《地壳形变与地震》
CSCD
1996年第2期53-57,共5页
Crustal Deformation and Earthquake
关键词
地倾斜
垂直形变
富里叶分析
地震过程
ground tilt
vertical deformation
Fourier analysis
seismic process
