两次强震前华南地区电离层TEC异常特征研究
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摘要
基于广州GPS-TEC监测网的VTEC数据,用连续15天的平均值和标准差作为参考,分析了华南地区电离层VTEC异常在2006年12月26日台湾南部恒春海域7.2级地震和2008年5月12日汶川8级地震前的活动特征。结果发现:强震前8天内,华南地区电离层连续出现异常扰动。在此基础上,分析了两次强震前华南地区电离层VTEC的异常响应特征,并和相关文献提到的强震前VTEC异常特征进行了对比,进而对地震引起电离层扰动的机理作了初步的讨论。
On the basis of the VTEC data given from Guangzhou GPS-TEC observational network,the characteristics of ionosphere VTEC above South China region before 7.2 earthquake in Taiwan on 26 Dec.2006 and Wenchuan 8.0 earthquake on 12 May 2008 are analyzed with the reference of the mean and standard deviation for 15 days.As a result,we found that the anomaly of ionosphere VTEC over South China region before the earthquakes took place continuously for 8 days and then the abnormal characteristics responding to two strong earthquakes are discussed and contrasted with the other from some literature.Further more the preliminary discussion on the mechanism of ionosphere anomaly caused by strong earthquake is down.
On the basis of the VTEC data given from Guangzhou GPS-TEC observational network,the characteristics of ionosphere VTEC above South China region before 7.2 earthquake in Taiwan on 26 Dec.2006 and Wenchuan 8.0 earthquake on 12 May 2008 are analyzed with the reference of the mean and standard deviation for 15 days.As a result,we found that the anomaly of ionosphere VTEC over South China region before the earthquakes took place continuously for 8 days and then the abnormal characteristics responding to two strong earthquakes are discussed and contrasted with the other from some literature.Further more the preliminary discussion on the mechanism of ionosphere anomaly caused by strong earthquake is down.
引文
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10林剑,等.基于GPS探测汶川地震电离层TEC的异常[J].地球物理学报,2009,52(1):297-300.
11邓柏昌,魏焕,屈晔.中强地震发生前电磁扰动机制的研究[J].西北地震学报,2009,31(3):
2张强,等.震前电离层TEC异常分析[J].大地测量与地球动力学,2007,27(3):91-96.
3吴云,等.利用地基GPS探测震前电离TEC异常[J].大地测量与地球动力学,2005,25(2):36-40.
4卓裕荣.电离层地震前兆之研究[D].台湾:国立中央大学太空科学研究所,2002.
5王惠南.GPS导航原理与应用[M].北京:科学出版社,2003年.
6刘正彦,等.借助连续的GPS TEC测量记录到的地震前电离层异常[J].国际地震动态,2005,(11):63-70.
7赵文化,等.2006年12月系列太阳耀斑事件的近地响应分析[J].华南地震,2007,27(3):68-78.
8 Pulinets S A,et al.Main phenomenological features of iono-spheric precursors of strong earthquakes[J].Journal of At-mospheric and solar-terrestrial Physics,2003,65:1 337-1347.
9蔡军涛,等.地震期间电离层扰动现象研究[J].地球物理学进展,2007,22(3):695-701,
10林剑,等.基于GPS探测汶川地震电离层TEC的异常[J].地球物理学报,2009,52(1):297-300.
11邓柏昌,魏焕,屈晔.中强地震发生前电磁扰动机制的研究[J].西北地震学报,2009,31(3):
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