| 基于SB-DInSAR时间序列探测地震形变过程的研究 |
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| 引用本文： | 罗三明,杨国华,董运洪,韩月萍,李陶,袁油新.基于SB-DInSAR时间序列探测地震形变过程的研究[J].大地测量与地球动力学,2011,31(6):15-19. |
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| 作者姓名： | 罗三明 杨国华 董运洪 韩月萍 李陶 袁油新 |
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| 作者单位： | 1)中国地震局第一监测中心，天津 300180;2)武汉大学卫星导航定位技术研究中心，武汉 430079 |
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| 基金项目： | 地震行业科研专项重大项目，国家自然科学基金，中国地震局第一监测中心青年基金 |
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| 摘 要： | 对2009年4月6日意大利拉奎拉6.3级地震9景ENVISAT重轨单视复数据采用双轨模式进行小基线（SB）干涉处理，获得了此次地震的SB-DInSAR时间序列干涉图、位移场以及位移速度场。结果表明：1)地震位移场形变过程为由震前的缓慢变化到震后的加速运动，速度明显由慢到快；2）震中以西为大面积隆起区，最大隆起量为140 mm；震中以东为大面积下沉区域，但形变集中在破裂区,主要在发震过程及震后形成，最大沉降量达185 mm；3）地震产生的破裂主要沿震中的东南方向传播，集中在约13.4 km×7.6 km、方向约135°的椭圆形区域内。
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| 关 键 词： | SB-DInSAR 时间序列 拉奎拉地震 雷达干涉 形变过程 |
DETECTION BASED ON SB-DInSAR TIME SERIES OF EARTHQUAKE DEFORMATION PROCESS |
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| Luo Sanming,Yang Guohua,Dong Yunhong,Han Yueping,Li Tao,Yuan Youxi.DETECTION BASED ON SB-DInSAR TIME SERIES OF EARTHQUAKE DEFORMATION PROCESS[J].Journal of Geodesy and Geodynamics,2011,31(6):15-19. |
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| Authors: | Luo Sanming Yang Guohua Dong Yunhong Han Yueping Li Tao Yuan Youxi |
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| Institution: | 1)First Crust Monitoring and Application Center, CEA, Tianjin 300180;2)GNSS Research Center, Wuhan University, Wuhan 430079 |
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| Abstract: | On the basis of processing of 9 scene repeat track Single Look Complex Envisat ASAR data with Small Baseline (SB) method by 2 pass mode, a time series difference interferograms and deformation field and its velocity of L′Aquila Mw6.3 earthquake occurred on April 6, 2009 were obtained. The results show as follows. 1) There was an obvious process of displacement and its velocity from slow to speeded up is determined from pre seismic to post seismic. 2) In the analyzed area of about 54 km×59 km, westward of epicenter shows uplift, and its maximum uplift value is 140mm in the Line Of Sight(LOS) and the east to epicenter is subsidence area. However, the head subsidence region is a rupture area, and its majority formed in the course of shocking and subsequence. The maximum settlement reaches to 185 mm. 3)The rupture propagates mainly southeastwards, about 135°, from epicenter, and concentrates on an elliptic area of about 13.4 km×7.6 km. |
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| Keywords: | SB-DInSAR time series L′Aquila earthquake radar interferometry deformation process |
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