| Active blocks and their deformations derived from the velocity field in North China |
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| 作者姓名： | 黄立人 杨国华 王敏 |
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| 作者单位： | FirstCrustalDeformationMonitoringCenter,ChinaSeismologicalBureau,Tianjin300180,China |
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| 基金项目： | State Key Basic Research Development and Programming Project Mechanism and Prediction of Strong Continental Earthquakes (G1998040703). |
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| 摘 要： | Based on the horizontal movement velocities and their error estimations of 144GPS stations in North China de-duced from the results obtained from multiple GPS measurements carried out in the period of 1992-2001,the horizontal deformation in the area is stuklied.The movements,entire deformations,local deformations,activeity patterns and intensities along the boundary zones are derived.And then the risk of strong earthquake in the area is estimated.In the research,the horizontal displacement observations can be considered as the sum of three parts.The first part is the entire motion following Eurasian plate,which can be derived from NUVAL-IA model;the second part is the relative motions and deformations between the sub-tectonic blocks in the studied area,which can be derived from a set of displacement observations determined by the expanded QUAD method in the paper;the third part is the local deformations and errors in the sub-tectonic blocks,which can be described as the inhomoge-neous strains of the block.The method and results are introduced in detail in the paper.
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| 关 键 词： | 水平运动速率 华北地区 速度场 板块运动 地震危险性 地壳运动 |
| 收稿时间： | 19 March 2002 |
| 修稿时间： | 23 July 2002 |
Active blocks and their deformations derived from the velocity field in North China |
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| Huang Li-ren , Yang Guo-hua and Wang Min.Active blocks and their deformations derived from the velocity field in North China[J].Acta Seismologica Sinica(English Edition),2003,16(1):79-91. |
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| Authors: | Huang Li-ren Yang Guo-hua and Wang Min |
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| Institution: | First Crustal Deformation Monitoring Center, China Seismological Bureau, Tianjin 300180, China |
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| Abstract: | Based on the horizontal movement velocities and their error estimations of 144 GPS stations in North China de-duced from the results obtained from multiple GPS measurements carried out in the period of 1992~2001, the horizontal deformation in the area is studied. The movements, entire deformations, local deformations, activity patterns and intensities along the boundary zones are derived. And then the risk of strong earthquake in the area is estimated. In the research, the horizontal displacement observations can be considered as the sum of three parts. The first part is the entire motion following Eurasian plate, which can be derived from NUVAL-IA model; the second part is the relative motions and deformations between the sub-tectonic blocks in the studied area, which can be derived from a set of displacement observations determined by the expanded QUAD method in the paper; the third part is the local deformations and errors in the sub-tectonic blocks, which can be described as the inhomoge-neous strains of the block. The method and results are introduced in detail in the paper. |
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| Keywords: | North China area horizontal movement application of QUAD method |
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