【摘要】 利用IGS提供的电离层TEC资料,采用滑动平均方法,对2007年以来全球Ms7.0以上地震进行震前电离层TEC异常扰动研究。统计结果显示:94%的地震的孕震区上空出现了明显的电离层TEC异常扰动,扰动有正有负,而且负的异常扰动多发生在震前一周内,正扰动与时间没有明显的函数关系。更多还原

【Abstract】 It has been proved by a number of researches that the ionospheric anomalous disturbance do appear a few days or hours before earthquake.On the basis of Total Electron Content(TEC) obtained from Internet GPS Service(IGS),by use of the method of moving average,the 50 Ms≥7.0 earthquakes all over the world since January 1,2007 were examined.The statistical results show that,excluding the other possible factors,there were significant ionospheric disturbances including ionospheric anomalous increase and anomalous decrease before the 94% of all the earthquake onset,and the apparent anomalous decrease occurred within 7 days before the earthquake but the anomalous increase is not the function of the time.更多还原