【摘要】 利用球谐模型和中国地壳运动观测网络及IGS(International GNSS Service)基准站的GPS观测数据,分别计算了中国区域及全球电离层电子总含量(Total Electron Content,TEC),采用了不同的统计分析方法,对汶川震中上空及邻近区域的TEC进行检查.结果发现:震前后一个星期,孕震区上空连续出现电离层异常扰动,其异常形态具有共轭结构,且呈现向磁赤道漂移趋势.更多还原

【Abstract】 Utilizing spherical harmonic model,the GPS observational data of fiducial station in the crustal movement observation network of China and IGS fiducial station,calculating the total electron content of Chinese and global region respectively,and adopting different statistical analysis method,we examined the TEC on Wenchuan epicenter and around the region.As a result,we found that the anomalous VTEC disturbances over seismic preparation zone continuously took place in a week before and after the earthquake,whose form had conjugate structure and shifted to magnetic equatora.更多还原