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| 华南地区电离层在汶川地震前VTEC异常的研究 | |
| 引用本文： | 邓柏昌,杨马陵,黄江,赵文化.华南地区电离层在汶川地震前VTEC异常的研究[J].华南地震,2009,29(4):8-15. |
| 作者姓名： | 邓柏昌 杨马陵 黄江 赵文化 |
| 作者单位： | 1. 华南理工大学理学院物理系,广东,广州,510641 2. 广东省地震局,广东,广州,510070 3. 广州气象卫星地面站,广东,广州,510640 |
| 摘 要： | 基于华南地区GPS监测网数据．解算出华南地区电离层VTEC在汶川地震前出现的异常。从时间序列和空间等值线分布两方面分析了VTEC的变化．时间序列分析表明5月4日至5月12日电离层VTEC负异常扰动明显．5月4日至5月13日的空间分布也表明了同样的结论，并同时指出负异常有向低纬度区域漂移的趋势。并对异常判断依据和机理作了初步的讨论． |
| 关 键 词： | 华南地区 电离层VTEC 汶川地震 地震异常 |
Study on VTEC Anomaly of Ionosphere in South China before and after Wenchuan-Earthquake |
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| DENG Baichang,YANG Maling,HUANG Jiang,ZHAO Wenhua.Study on VTEC Anomaly of Ionosphere in South China before and after Wenchuan-Earthquake[J].South China Journal of Seismology,2009,29(4):8-15. | |
| Authors: | DENG Baichang YANG Maling HUANG Jiang ZHAO Wenhua |
| Institution: | DENG Baichang, YANG Maling, HUANG Jiang and ZHAO Wenhua(1.Physical Department of College of Science, South China University of Technology, Guangzhou 510641, China; 2.Earthquake Administration of Guangdong Province, Guangzhou 510070, China 3. Guangzhou Meteorological Satellite Station, Guangzhou 510640, China) |
| Abstract: | Based on the GPS-VTEC observation data from Guangzhou GPS observation network, we computed the VTEC anomalies of ionosphere in South China before and after Wenchuan earthquake. From the time series and isoline distribution, we analyzed the changes of VTEC. The result and analysis indicate that there were ionospheric VTEC negative anomalies during one week prior to the earthquake. The isoline distribution also shows that the ionospheric VTEC negative anomaly moved towards low latitude regions. Further we preliminarily discussed the judgment basis and mechanism of ionosphere anomaly caused by strong earthquakes. |
| Keywords: | South China Ionosphere VTEC Wenchuan earthquake Seismic anomaly |
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