| 汶川8．0级地震前龙门山断裂带的垂直变化特征 |
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| 引用本文： | 郭良迁,塔拉,孙东颖,杜雪松.汶川8．0级地震前龙门山断裂带的垂直变化特征[J].华南地震,2009,29(3):1-8. |
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| 作者姓名： | 郭良迁 塔拉 孙东颖 杜雪松 |
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| 作者单位： | 中国地震局第一监测中心,天津,300180 |
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| 基金项目： | 中国地震局"全国地震区划图编制项目"和"十一五"国家科技支撑课题 |
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| 摘 要： | 根据龙门山构造带上的跨断层水准测量资料，计算了龙门山断裂带1986年至2008年1月的垂直活动速率、断层形变异常强度及测线的月变化率，研究了龙门山断裂带1986至2008年初的异常变化。结果表明．龙门山断裂带的垂直活动速率不大，在1mm／n以下。但是在大震发生前的1～3a．断层活动加速．在形变异常强度图上变化显著，在月变率统计图上，也有明显的异常．龙门山断裂带的断层形变异常对于南北地震带上600余公里以内的3次7级以上大震均有反映．对本区的地震反映更明显。
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| 关 键 词： | 地震 断层形变 异常强度 月变率 |
Vertical Deformation Characteristic of Longmenshan Fault Zone before Wenchuan Ms8.0 Earthquake |
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| GUO Liangqian,TA La,SUN Dongying,DU Xuesong.Vertical Deformation Characteristic of Longmenshan Fault Zone before Wenchuan Ms8.0 Earthquake[J].South China Journal of Seismology,2009,29(3):1-8. |
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| Authors: | GUO Liangqian TA La SUN Dongying DU Xuesong |
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| Institution: | GUO Liangqian,TA La,SUN Dongying and DU Xuesong(First Crust Monitoring and Application Center,China Earthquake Administration,Tianjin 300180,China) |
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| Abstract: | Based on the cross-fault leveling data in Longmenshan tectonic belt,we calculated the vertical activity rates of Longmenshan fault zone within 1986-2008,anomaly intensities of fault deformation and monthly variation rates of the survey line and studied the anomalies of Longmenshan fault zone within 1986-2008.The result shows that the vertical activity rates of Longmenshan fault zone are not high and below 1mm/a,however,during one to three years before the large MS8.0 earthquake,the fault activity was increa... |
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| Keywords: | Earthquake Fault deformation Anomaly intensity Monthly variation rate |
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