| 基于移动Chapman－Millre方法的汶川Ms8．0地震电离层异常研究 |
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| 引用本文： | 谢嘉丽,高淑照,徐京华,曾行.基于移动Chapman－Millre方法的汶川Ms8．0地震电离层异常研究[J].测绘与空间地理信息,2016(3):41-44. |
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| 作者姓名： | 谢嘉丽 高淑照 徐京华 曾行 |
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| 作者单位： | 西南交通大学地球科学与环境工程学院,四川成都,610031 |
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| 基金项目： | 中央高校基本科研业务费专项资金(2682015LX019) |
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| 摘 要： | 基于IGS全球电离层TEC地图数据，提取到汶川地震上空TEC时间序列。使用移动Chapman－Miller太阳日变化分析方法，研究了地震前后15天TEC异常现象。结果显示，地震前6天（除5月9日外） TEC都出现了不同程度的减小现象，5月9日TEC周日峰值出现延迟现象；5月3日，即地震前第9天出现了TEC增大现象。离发震时刻较远的4月29日出现了TEC减小现象；震后3天也出现了明显的减少现象。排除磁暴等因素后，认为这些异常现象可能是汶川地震引起的地震－电离层耦合效应。
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| 关 键 词： | 电子总含量(TEC) 电离层异常 汶川Ms8.0地震 IGS Chapman-Miller方法 |
Investigation on Ionospheric Anomaly of Wenchuan MS8 .0 Earthquake Based on Moving Chapman-miller Method |
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| Abstract: | Based on the global ionospheric TEC maps( GIMs) downloaded from International GNSS Service ( IGS) , the TEC time se-ries above the epicenter of Wenchuan Ms8.0 earthquake were extracted.Then Chapman-Miller method was used to study ionospheric anomaly before and after the earthquake.The results showed that TEC in the six days before the earthquake ( except May 9) had suf-fered different abnormalities of decrease, and TEC crest delayed on May 9.On May 3, nine days before the earthquake, the phenome-non of abnormal increase of TEC had been discovered.On April 29, there existed the TEC anomalies phenomenon of decrease.Elimi-nated the impact of geomagnetic activity , these anomalies were considered to be caused by earthquake-ionosphere coupling effect. |
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| Keywords: | Total Electron Content( TEC) ionospheric anomaly Wenchuan Ms8 0 earthquake IGS Chapman -Miller method |
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