InSAR及其差分技术在仲巴地震中的应用
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摘要
介绍了InSAR及其差分技术的基本原理,并以发生在2004年7月12日西藏日喀则地区仲巴县与阿里地区之间(北纬30.5°,东经83.4°)的里氏6.7级(中国台网测定)仲巴地震为例,采用已知DEM的二路差分法获取了仲巴地震的同震形变场。采用Okada弹性半空间位错模型反演了该地震的震源参数,得到了震源机制解。结果表明,仲巴地震为以倾滑为主的右旋正断层型地震,断层面走向近乎南北方向。
InSAR and differential interferometric synthetic aperture radar(D-InSAR) are generally introduced;Zhongba earthquake which occurred in July 12,2004 between Tibet Xigaze area Zhongba county and the Ngari area(northern latitude 30.5,east longitude 83.4°) with the Lishi magnitude 6.7 is selected as an example to obtain the coseismic deformation field with the two-pass differential interferometric processing method.The Okada elastic half space dislocation model is used to inverse inversion this earthquake's center of origin parameter,to obtain the focal mechanism solution.
InSAR and differential interferometric synthetic aperture radar(D-InSAR) are generally introduced;Zhongba earthquake which occurred in July 12,2004 between Tibet Xigaze area Zhongba county and the Ngari area(northern latitude 30.5,east longitude 83.4°) with the Lishi magnitude 6.7 is selected as an example to obtain the coseismic deformation field with the two-pass differential interferometric processing method.The Okada elastic half space dislocation model is used to inverse inversion this earthquake's center of origin parameter,to obtain the focal mechanism solution.
引文
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[7]Makovsky Y,Klemperer S,Ratschbacher L.Mid-crustal Reflector on INDEPTH Wide_Angle Pro-files:an Ophioltic Slab Beneath the India Asia Su-ture in southern Tibet[J]?Tectonics,1999,18(5):793-808
[8]张学友,尹安.地球的结构、演化和动力学[M].北京:高等教育出版社,2002:207-248
[9]曾融生,丁志峰,吴庆举,等.喜马拉雅及南藏的地壳俯冲带:地震学证据[J].地球物理学报,2000,43(6):780-797
[10]Qin C Y,Papazachos C,Papadimitriou E.VelocityField for Crustal Deformation in China Derived fromSeismic Moment Tensor Summation of Earthquakes[J].Tectonophysics,2002,359:29-46
[11]李娟,王卫民,赵连锋.2004年7月11日西藏M_W6.2级地震震源破裂过程研究[J].地球物理学报,2005,48(4):843-85
[2]单新建,宋晓宇,柳稼航,等.星载InSAR技术在不同地形地貌区域的DEM提取及其应用评价[J].科学通报,2001,46(24):2 074-2 079
[3]王超,刘智,张红,等.张北-尚义地震同震形变场雷达差分干涉测量[J].科学通报,2000,45(23):2550-2 554
[4]Massonnet D,Rossi M,Carmona C,et al.The Dis-placement Field of the Landers Earthquake MappedBy Radar Interferometry[J].Nature,1993,364:138-142
[5]Peltzer G,Grampe F,King G,et al.Evidence ofNonlinear Elasticity of the Crust from the Mw7.6Mani(Tibet)Earthquake[J].Science,1999,286:272-276
[6]Owens T J,Zandt G.Implications of Crustal Prop-erty Variations for Models of Tibetan Plateau Evo-lution[J].Nature,1997,387:37-43
[7]Makovsky Y,Klemperer S,Ratschbacher L.Mid-crustal Reflector on INDEPTH Wide_Angle Pro-files:an Ophioltic Slab Beneath the India Asia Su-ture in southern Tibet[J]?Tectonics,1999,18(5):793-808
[8]张学友,尹安.地球的结构、演化和动力学[M].北京:高等教育出版社,2002:207-248
[9]曾融生,丁志峰,吴庆举,等.喜马拉雅及南藏的地壳俯冲带:地震学证据[J].地球物理学报,2000,43(6):780-797
[10]Qin C Y,Papazachos C,Papadimitriou E.VelocityField for Crustal Deformation in China Derived fromSeismic Moment Tensor Summation of Earthquakes[J].Tectonophysics,2002,359:29-46
[11]李娟,王卫民,赵连锋.2004年7月11日西藏M_W6.2级地震震源破裂过程研究[J].地球物理学报,2005,48(4):843-85
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