2014年鲁甸6.5级地震震前TEC异常分析Analysis of TEC anomalies before the 2014 MW 6.5 Ludian earthquake
邹斌;常晓涛;郭金运;毛继军;李旺;
摘要(Abstract)：
2014年8月3日云南省鲁甸发生了6.5级地震。针对震前电离层异常问题,利用IGS提供的全球电离层数据,采用滑动四分位法对鲁甸地震震中及其周围格网点的TEC进行异常探测,发现震前3d、6d和13d电离层有明显的异常,其中震前3d、6d的异常最为显著。在进一步分析了太阳地磁活动及这几天的全球TEC异常分布后,认为这3d的电离层异常可能与震前的孕育地震有关。另外,这3d的TEC异常分布区域都满足在经度方向跨度和纬度方向跨度长度比约为3∶1,且异常的峰值点并不位于震中的正上方,而是位于震中偏向赤道方向,同时赤道共轭区域也存在异常,但范围和幅度都较小。
关键词(KeyWords)： 鲁甸地震;电离层异常;TEC;太阳地磁活动;滑动四分位法
基金项目(Foundation): 国家自然科学基金项目(41374009);; 公益性行业科研专项(201412001);; 山东省自然科学基金项目(ZR2013DM009);; 科技基础性工作专项(2015FY310200)
作者(Authors): 邹斌;常晓涛;郭金运;毛继军;李旺;
DOI: 10.16251/j.cnki.1009-2307.2017.03.009
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