| 利用D-InSAR技术研究西藏改则地震同震形变场 |
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| 引用本文： | 张桂芳,单新建,张国宏.利用D-InSAR技术研究西藏改则地震同震形变场[J].地震地质,2009,31(2):334-340. |
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| 作者姓名： | 张桂芳 单新建 张国宏 |
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| 作者单位： | 中国地震局地质研究所,地震动力学国家重点实验室,北京,100029 |
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| 基金项目： | 中国地震局地质研究所基本科研业务专项，国家科技支撑计划项目，国家自然科学基金 |
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| 摘 要： | 针对2008年1月9日MW6.4西藏改则地震和2008年1月16日的MW5.9余震,通过两通(2-pass)加外部DEM差分干涉处理技术(D-InSAR),提取了地震区域2次地震累积的视线向(LOS)同震形变场。结果表明:发震断层均为正断层,位于依布茶卡-日干配错断裂端点附近。主震发震断层走向为N30°E,余震发震断层走向为N21°E,两断层距离约7km;在影像上主震发震断层有造成地表破裂的痕迹,余震未见地表破裂的痕迹;这次地震造成的同震形变场长约30km,宽约20km,主震断层上盘和下盘视线向最大形变量分别为39.2cm和11.2cm,两盘相对位错达50.4cm,余震造成的视线向形变量为9.4cm
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| 关 键 词： | 差分干涉测量 改则地震 同震形变场 |
| 收稿时间： | 2009-03-11 |
OBSERVING COSEISMIC DEFORMATION OF THE GAIZE,XIZANG EARTHQUAKE WITH DIFFERENTIAL INTERFEROMETRIC SAR |
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| ZHANG Gui-fang,SHAN Xin-jian,ZHANG Guo-hong.OBSERVING COSEISMIC DEFORMATION OF THE GAIZE,XIZANG EARTHQUAKE WITH DIFFERENTIAL INTERFEROMETRIC SAR[J].Seismology and Geology,2009,31(2):334-340. |
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| Authors: | ZHANG Gui-fang SHAN Xin-jian ZHANG Guo-hong |
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| Affiliation: | State Key Laboratory of Earthquake Dynamics;Institute of Geology;China Earthquake Administration;Beijing 100029;China |
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| Abstract: | There are two earthquakes in Gaize on Jan 9(MS 6.9)and Jan 16,2008(MS 6.0).The two earthquakes were selected as examples to obtain the co-seismic deformation field with the 2-pass differential interferometric processing method.The results show that the earthquake faults locate near the tip of the Yibuchaka-Riganpeicuo Fault,and both seismic faults are normal faults;The seismogenic fault of the main shock strikes about N30°E and that of the aftershock strikes about N21°E;There is evidence of surface rupture |
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| Keywords: | D-InSAR Gaize earthquake coseismic deformation |
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