全球定位系统2016，Vol.41Issue(4)：63-69,76,8.DOI:10.13442/j.gnss.1008-9268.2016.04.014
基于主成分分析与滑动四分位法的震前 TEC 异常探测对比分析
Analysis of TEC Anomalies before Earthquake Based on Principal Component Analysis and the Sliding Inter Quartile Range Method
摘要
Abstract
This paper using the global ionospheric map data from IGS and then using principal component analysis method and the sliding inter quartile range method to investi‐gate precursors for 4 earthquakes of Richter magnitude scale Mw ≥ 7.0 (Wenchuan earth‐quake ,Yushu earthquake ,Japan 311 earthquake ,Yutian earthquake) .Results shows that both methods can effectively detect pre‐earthquake T EC anomaly and the anomaly has stable time scale .Compared two methods ,PCA is better ,it detects the anomaly more intuitive and concise ,but the sliding inter quartile range method detects more abnormal days than PCA . However ,the results of two methods has a common trend ,and the results of two methods is consistent with the results from other scholars .In addition ,PCA is not affected by solar ge‐omagnetic activity ,this finding verify that PCA can be used in pre‐earthquake ionospheric a‐nomaly analysis .So it obvious that combine two methods effectively when analysis the pre‐earthquake ionospheric anomaly can have a better effect .关键词
地震/T EC/主成分分析/滑动四分位法/电离层异常Key words
Earthquake/Total Electron Content/principal component analysis/sliding inter quartile range method/ionospheric anomaly分类
天文与地球科学引用本文复制引用
邹斌,郭金运,常晓涛,朱广彬,李武东..基于主成分分析与滑动四分位法的震前 TEC 异常探测对比分析[J].全球定位系统,2016,41(4):63-69,76,8.基金项目
国家自然科学基金（批准号41374009，41204007）；山东省自然科学基金（批准号ZR2013DM009）；国家科技基础性工作专项（编号2015FY310200）；国家重点基础研究发展计划（编号2013CB733302）；测绘地理信息公益性行业科研专项项目 （）
