全球定位系统2016，Vol.41Issue(5)：18-22,27,6.DOI:10.13442/j.gnss.1008-9268.2016.05.004
基于GNSS的日本熊本地震前电离层异常研究
Ionospheric Anomalies Preceding Kumamoto Earthquake Detected by GNSS
周长志 1张珂 1张海平 1高士民 1陈钰1
作者信息
摘要
Abstract
On April 1 6,201 6,the Mw7.0 Kumamoto earthquake abruptly shocked in Ja-pan.In order to analyze the ionospheric variations in earthquake preparation area before the great earthquake,the GIM (global ionosphere map)supplied by the Center for Orbit Deter-mination in Europe and the observation data of gmsd and smst stations were utilized.Consid-ering the ionospheric disturbances caused by solar-terrestrial environment,the results indica-ted the total electron content decreased sharply in the 1 st day before Kumamoto earthquake, the amplitude was about-8 TECU.In addition,the distribution of global TEC anomalies showed obvious negative TEC anomalies appeared in the seismogenic zone,and most of TEC anomalies were distributed in the northern and southeast regions of Kumamoto earthquake, the duration of TEC anomalies was approximately 12 hours,which may be the ionospheric precursors of Kumamoto earthquake.关键词
熊本地震/电离层异常/GNSS/日地环境Key words
Kumamoto earthquake/ionospheric anomalies/GNSS/solar-terrestrial envi-ronment分类
天文与地球科学引用本文复制引用
周长志,张珂,张海平,高士民,陈钰..基于GNSS的日本熊本地震前电离层异常研究[J].全球定位系统,2016,41(5):18-22,27,6.
