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汶川地震前电离层NmF2异常扰动
ANOMALOUS DISTURBANCE OF IONOSPHERIC NmF2 DURING WENCHUAN EARTHQUAKE
【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。
【Abstract】 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;
【Key words】 earthquake precursor; GPS occultation; ionospheric disturbance; electronic density; seismic surveillance;
【Key words】 earthquake precursor; GPS occultation; ionospheric disturbance; electronic density; seismic surveillance;
【基金】 国家863项目(2007AA12Z169);国家自然科学基金(40774014)
- 【文献出处】 大地测量与地球动力学 ,Journal of Geodesy and Geodynamics , 编辑部邮箱 ,2008年06期
- 【分类号】P315.72
- 【被引频次】10
- 【下载频次】184