用EOF分析方法研究强震前中国大陆水平位移场时空分布特征

利用大气科学常用的经验正交函数(EOF)分解方法, 对中国大陆连续观测的基准站的水平位移每周解时间序列进行分析。 首先对时间序列中不连续的数据进行内插处理, 并通过线性拟合从时间序列中去掉长期滑动速率的影响。 结合震例研究强震前水平位移场在NS向和EW向的时间和空间的分布特征。

Study on the temporal and spatial distribution of the hori-zontal displacement fields in China's continent before strong earthquake by EOF analysis

The article analyzed the weekly time series data of horizontal displacement at fiducial stations of China's continent by using the empirical orthogonal function (EOF) in Meteorology. Firstly, making the time series continuous through inserting data, and secondly removing the secular displacement rate from the time series data through linear fitness. The authors studied the temporal and spatial distribution of the horizontal displacement fields in EW component and NS component before strong earthquakes by analyzing strong earthquake examples.