汶川大地震前后电离层电子含量的扰动分析

Perturbation Analysis of the Ionospheric TEC before and after the Wenchuan Earthquake

为了分析地震前后电离层电子含量的变化,本文选取四川汶川发生8.0级地震前后10天电离层中的电子含量作为研究对象,使用IGS网站提供的VTEC数据,采取统计学分析方法,结合太阳和地磁活动信息,对此次地震前后电离层VTEC资料进行了详细的统计分析和讨论,数据分析结果表明大地震前电离层电子含量会出现明显扰动,电离层中电子含量的异常变化有可能是地震发生的前兆信息.

To analyze the variation of the ionospheric total electron content（TEC）around the earthquakes,we select the ionospheric TEC of 10 days before and after the Ms8.0 earthquake that occurred on May 12,2008 in Wenchuan as our research object.Adopting the statistical analysis method,the Ionopsheric VTEC data during the earthquake has been analyzed and discussed in detail,using the VTEC data offered by IGS,together with the solar and geomagnetic information.Numerical results show that obvious TEC disturbance existed before the great earthquake,and the abnormal variations of the ionospheric TEC may be precursors to the earthquake.