汶川地震前后四川盆地CORS站运动特性分析
为探讨四川盆地在汶川地震前后地壳运动的规律,对2006年3月至2012年9月四川12个连续运行参考站(continuously operating reference stations,CORS)6年多的观测资料进行了详细的处理和分析。通过比较震前震后CORS站运动的相似性和差异性发现:由于震后形变的影响,震后第一主成分(principle component first,PC1)的贡献率下降20%~40%;震后多站的速度场发生了明显的变化,突出表现在PIXI、CHDU、MYAN等站,YAAN、QLAI站处于闭锁状态;盆地垂直分量的周年振幅在震前一年偏大,震后逐年减小。以上发现表明汶川地震可能...
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| Published in | Ce hui xue bao Vol. 43; no. 6; pp. 582 - 589 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese English |
| Published |
Beijing
Surveying and Mapping Press
01.06.2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 1001-1595 |
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| Abstract | 为探讨四川盆地在汶川地震前后地壳运动的规律,对2006年3月至2012年9月四川12个连续运行参考站(continuously operating reference stations,CORS)6年多的观测资料进行了详细的处理和分析。通过比较震前震后CORS站运动的相似性和差异性发现:由于震后形变的影响,震后第一主成分(principle component first,PC1)的贡献率下降20%~40%;震后多站的速度场发生了明显的变化,突出表现在PIXI、CHDU、MYAN等站,YAAN、QLAI站处于闭锁状态;盆地垂直分量的周年振幅在震前一年偏大,震后逐年减小。以上发现表明汶川地震可能改变了四川盆地原有的运动特性。 |
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| AbstractList | 为探讨四川盆地在汶川地震前后地壳运动的规律,对2006年3月至2012年9月四川12个连续运行参考站(continuously operating reference stations,CORS)6年多的观测资料进行了详细的处理和分析。通过比较震前震后CORS站运动的相似性和差异性发现:由于震后形变的影响,震后第一主成分(principle component first,PC1)的贡献率下降20%~40%;震后多站的速度场发生了明显的变化,突出表现在PIXI、CHDU、MYAN等站,YAAN、QLAI站处于闭锁状态;盆地垂直分量的周年振幅在震前一年偏大,震后逐年减小。以上发现表明汶川地震可能改变了四川盆地原有的运动特性。 为探讨四川盆地在汶川地震前后地壳运动的规律，对2006年3月至2012年9月四川12个连续运行参考站(continuously operating reference stations,CORS)6年多的观测资料进行了详细的处理和分析。通过比较震前震后CORS站运动的相似性和差异性发现：由于震后形变的影响，震后第一主成分(principle component first,PC1)的贡献率下降20%～40%；震后多站的速度场发生了明显的变化，突出表现在PIXI、CHDU、MYAN等站，YAAN、QLAI站处于闭锁状态；盆地垂直分量的周年振幅在震前一年偏大，震后逐年减小。以上发现表明汶川地震可能改变了四川盆地原有的运动特性。 |
| Author | 李萌 黄丁发 严丽 廖华 冯威 袁林果 |
| AuthorAffiliation | 西南交通大学地球科学与环境工程学院 四川省地震局减灾救助研究所 |
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| Notes | LI Meng;HUANG Dingfa;YAN Li;LIAO Hua;FENG Wei;YUAN Linguo;Faculty of Geosciences and Environment Engineering,Southwest Jiaotong University;Disaster Relief Research Institute,Sichuan Provincial Earthquake Bureau 11-2089/P ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 |
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| Snippet | 为探讨四川盆地在汶川地震前后地壳运动的规律,对2006年3月至2012年9月四川12个连续运行参考站(continuously operating reference stations,CORS)6年多的观测资料进行了详... 为探讨四川盆地在汶川地震前后地壳运动的规律，对2006年3月至2012年9月四川12个连续运行参考站(continuously operating reference stations,CORS)6年多的观测资料进行了详... |
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| SubjectTerms | CORS Deformation effects Earthquakes Maximum likelihood estimation Moisture effects Pressure effects Principal components analysis Seismic activity Snow depth Soil moisture Spatial filtering Time series Velocity distribution 汶川地震 闭锁 震后形变 |
| Title | 汶川地震前后四川盆地CORS站运动特性分析 |
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