GPS长趋势变化与大地震的关系  

Relation Between Change of GPS Long Trend and Big Earthquake

作　　者：张燕[1] 吴云[1] 段维波[1] 吕品姬[1] 

机构地区：[1]中国地震局地震研究所,武汉市洪山侧路40号430071

出　　处：《武汉大学学报（信息科学版）》2012年第6期675-678,共4页Geomatics and Information Science of Wuhan University

基　　金：中国地震局科研专项资助项目(201101014);中国地震局地震研究所所长基金资助项目(IS201146017)

摘　　要：分析了中国大陆27个基准站运行以来至2011年3月的坐标时间序列数据,利用小波变换进行了分频段处理,重点分析了长趋势项(T≥512d)。从长趋势项曲线形态上可以看出站点存在分区特征,同一区域的站点曲线相关系数较高,且区域与地块重合性较好;在曲线形态出现涨落特征后,中国大陆及周边地区会发生Ms 7.5级以上地震。We give an analysis of 27 fiducial stations＇coordinates of time series data in China since March 3,2011, which are sub-band processed through the wavelet transformation to extract a long trend items （T≥512 d） primarily. From the curve of the long trend items we can see that the stations have regional characteristics, the stations from the same region have a big correlation coefficient, and has a good coincidence with the block. When the curve has fluctuation characteristics, there always be earthquake above Ms 7. 5 happened in Chinese mainland and its surroundings afterward. This phenomenon is of great significance and refer- ence value for the medium-term （1-3 a） Earthquake prediction.

关 键 词：时间序列 小波变换 相关系数 地震预测 

分 类 号：P228.42[天文地球—大地测量学与测量工程] P227[天文地球—测绘科学与技术]