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.
出处
《大地测量与地球动力学》
CSCD
北大核心
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)
关键词
地震前兆
GPS掩星
电离层扰动
电子密度
地震监测
earthquake precursor
GPS occultation
ionospheric disturbance
electronic density
seismic surveillance
