GPS水平位移时间序列地震短期信息特征分析

Analyzing the characteristics of short-term anomalous information of GPS time-series data before earthquake

对GPS基准站连续观测水平位移时间序列数据的时-频特征进行了分析,为了突出局部变化的信息,在中国大陆东部选取一组参考点进行相似变换。利用小波分析和傅里叶分析方法对资料进行处理,分析结果表明,2001年11月14日昆仑山口西8.1级大地震前中国大陆西部部分测点水平位移序列出现短期变化信号。

Analyzing the characteristics of the time series data of horizontal displacement from the continuous GPS network in time and frequency domain, the similarity transformation is conducted in order to give prominence to the local deformation by selecting a few stations in the Eastern China. The data is calculated by using the wavelet transformation and Fourier transformation. The result shows that there are anomalous information of the GPS data of some stations in the west of China before the Ms8. 1 Kunlun earthquake on November 14^th, 2001.