汶川地震前电离层NmF2异常扰动  

ANOMALOUS DISTURBANCE OF IONOSPHERIC NmF2 DURING WENCHUAN EARTHQUAKE

作　　者：熊晶[1] 吴云[1,2] 祝芙英[1,2] 林剑[1,2] 周义炎[1,2] 杨剑[1,2] 

机构地区：[1]中国地震局地震研究所,武汉430071 [2]湖北省地震局,武汉430071

出　　处：《大地测量与地球动力学》2008年第6期22-26,共5页Journal of Geodesy and Geodynamics

基　　金：国家863项目(2007AA12Z169);国家自然科学基金(40774014)

摘　　要：利用COSMIC电离层掩星数据,对2008年5月12日汶川Ms8.0地震震中区上空4月至5月末的电离层F2层最大电子密度NmF2进行了时间序列分析,发现在4月震中区上空电离层F2层峰值电子密度NmF2没有明显异常变化,而在震前一周内多次出现明显负异常,排除其他因素,认为这些异常极有可能是由地震引起的。The Ms 8.0 earthquake occurred in Wenchuan of Sichuan province on May. 12,2008. On the base of the ionospheric occultation data from COSMIC system, we analyzed the max electronic density of ionospheric F2 layer（NmF2） over seismic preparation zone from April to the end of May. It was found that NmF2 was calm during April, but there was evidently negative anomaly during the 7 days around earthquake occurring. Having eliminated other factors, we think that these anomalies were probably caused by the generation of earthquake.

关 键 词：地震前兆 GPS掩星 电离层扰动 电子密度 地震监测 

分 类 号：P315.7[天文地球—地震学] P318.24[天文地球—固体地球物理学]