由多台定点长水管倾斜资料构建形变场时空演化图像的初步尝试及应用

尝试利用多台定点地倾斜形变资料构建形变场时空动态演化图形的方法,对中国大陆47个定点形变台水管倾斜仪资料进行分析处理,构建了地倾斜形变场时空演化分布图像.以2001年11月14日昆仑山口西8.1级地震为例,研究了地震前后水管倾斜资料的时空演化特征.结果显示在地震前后较多台站水管倾斜仪的日均值都出现了趋势上的较大变化,东西向日均值、南北向日均值和南北向潮汐因子的空间分布也都出现了大范围的变化,而东西向M2波的潮汐因子没有出现较明显的变化.随着定点形变台站的建设和资料的积累,该方法可以构建每月或者每周形变场的变化,有望用于地震预报工作.

A Primary Attempt to Construct Temporal and Spatial Evolution Image of Deformation Field by Water-tube Tiltmeter Records from Multi Permanent Deformation Stations and Application of the Method

A method of constructing the dynamic temporal and spatial evolution image of deformation field by using records of multi permanent deformation stations is attempted. On the base of this method, water-tube tiltmeter records of 47 deformation stations in China are analyzed, and images of temporal and spatial evolution of ground tilt are constructed. As a example, the dynamic change of ground tilt before and after the Ms8. 1 earthquake west to the Kunlun Mountain pass is studied. The result shows that there are obvious changes in the day average value of water-tube tiltmeter in many stations before and after the event. The spatial distribution of EW average, NS average and NW M2 tidal factor also appear noticeable difference, but there is no noticeable change in EW M2 tidal factor. This method is expected to use in the work of earthquake prediction through constructing the temporal and spatial deformation image of every month or every week with accumulation of observition data.