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?????????2009??2011??223??GPS?????????????????????????????????????????????????????85??E??43??N??磬??????????????????????????????????????GPS??????????????????????????????????????????????????????2011.08??2012.25?????29??GPS???????????????е????????????仯????????????????????仯????2011.4???????????2011.8????????????????С????????С???????α???????????????в???????????????????????????λ???????????XJKL??????????????????仯??????????仯????????????????????????????????????ε??????????????????嵽????????????仯????6.0?????μ?????????????     

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????1999~2009???IGS????????????????(TEC)????????????TEC???????I????dc????????????I????nc?????????仯??????仯????????о????????????????????????????????I????dc???????????????????????????????????????????????????????????????????????????I????dc?????????仯??????????????I????nc????????γ????????а???仯??????????I????dc???????I????nc????????仯????????????仯???仯????????????????85%?????????I????dc????????????????????????I????dc???????I????nc?????????仯?????澭γ??仯???????????????????仯??????????????????????I????dc????????I????nc?????????????P????????????????????????????0.9???????????D????st????K??p??A??p???????????????????????????С??0.4??????????????????????????????????????????TEC????仯????????????á?     

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????С????????????????С???任????CNES/GRGS??CSR??GFZ???о???????????GRACE???????λ????J2????????н???????????????????????????????SLR???????????J2????????е????????????????????????SLR??????????? J2?????GRACE J2????и???????????仯??????GRACE ???????λ???? J2???л???????161???????????????????????д?????????????S2????????????     

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???????GPS??GRACE?????????????α???????????????????GRACE???λ???GPS?????????????о?????(RMS)??С?????????????仯????λ???????????????н???????????GPS?????????????仯?????????????????????????????Щ???????????????????????????С?????????????????????????????????????п??????????????????????ó???GRACE?????α????????С????????????????????????????????????????????????GPS??????????????????д??μ??????????????????GPS???????????????о???     

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????????λ???????????2011???????????????????λ?????????????GPS??????????????????????????????????1??????????λ???????????????????λ????????????????????????????λ????λ????????嶼??????е????????о??5 000?????????????3 mm??????????λ???????λ???????GPS????????????????????2??????????????????????????????λ??????????????????????λ???????????1%??4%???С?????????????????????????????6%??15%????????Χ????????ò????????????????????????????????GPS????????2011????????????????????????????????3???????й????????????GPS?????????????2011?????????????????????????????????????(3.24??4.96)??10 ²² Nm???????????Mw8.97??9.10??4??2011???????????????????????????????????????????仯????????????????????????????????????????????Ч???     

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????InSAR?????????????????????? ??GPS???????????????λ?????????????????????????????????????????????????μ?????Ms8.1?????????????????????????????λ????????????????С???????????????????????????????????????λ???????GPS???????????????????????????????????????????????????Ms8.1?????????λ????????仯??     

昆仑山口西Ms8.1地震的地壳变形特征

利用全球定位系统1991－2001年及震后4期GPS观测数据。获得了2001年11月14日昆仑山口西地震（Ms8.1)的同震和震后形变运动图像，跨破裂带GPS网最近两点测得的最大同震形变为1.9m左右，而震后4个月断层蠕滑引起的变形约为80mm，破裂带两侧震后变形幅度具有非对称性。南侧震后变形基本是北侧的2－3倍。研究结果显示破裂带南盘在震后向偏东方向有明显移动，预示本次地震后能量的重新分配与积累，根据近几十年以来东昆仑断裂带的大地震由西向东扩展的特点，未来地震有向东迁移的可能。     

CHARACTERISTICS OF CRUSTAL DEFORMATION RELATED TO Ms8.1 KUNLUNSHAN EARTHQUAKE

1　IntroductionTheBogedabanapexofKunlunmountainanditsneighborhoodregionlocatedattheboundaryofXinjiangandQinghaiprovinceswerehitbyaMs8.1earthquakeonNovember 1 4,2 0 0 1 .ThisisthestrongestearthquakewithmagnitudebiggerthanMs8.0inmainlandChinasinceacomparableearth quakehappenedinDangxiongofTibetonNovember1 8,1 95 1 .TheepicenterdeterminedbyChineseseismicnetworkislocatedatN36.2°,E90 .9°,40 0kilometersawayfromRuoqiangcountyofXinjiangprovinceand 35 0kilometersfromGolmudcityre spectively.Mea…     

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????????????丽???????????α?????????????????,??Okada??????????????????????2001??11??14??????8.1??????????λ????????????α??????????????????1??????8.1???????????????????????????????????????λ??????????????40 mm?????2??????????????????????GPS?????????????????????????????????????????     

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????1995~2003????GPS????????????????????????? ?????????GPS????????????????????????????仯????????????????????????????????????????????????????,??1995~1997???2001~2003???????????????????????????????????????????????????С??????н??仯??????仯????????1999????弯??7.6?????????????????????????     

中国东西部地区震后形变有效松弛时间研究

顾及脆性转换带上的断层蠕动及其深部黏滞流对震后地表位移的影响,对5次大地震的震后垂直位移进行了最小二乘反演,并估计了有效松弛时间。反演结果表明,中国东、西部地震的有效松弛时间差异很大,其中唐山地震的有效松弛时间最长(10.3年),邢台地震次之(4.4年),而西部通海、炉霍、共和等3次地震的有效松弛时间则仅为2年多。究其原因,可能主要是由于中国东部和西部地区上地壳厚度不同以及下地壳、上地幔黏滞系数的差异所致。     

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?????????????????????GPS???????,??????????????Ms8.1??????????????λ???????????????????仯??????????????????????????:1???????????????й??????α??????????,??????????????????????γ????????????????;2?????????????????????粿?γ????????????????????????5.9?????????5.4???????????????????γ??????β??????????;3????????????嶫?????????????巴??,????????Χ???????嶫??????????????????????;4????????????????????????????????Щ??????     

中国大陆地壳运动与强震关系研究

利用GPS观测结果研究了中国大陆当前地壳运动的空间分布及其所揭示的大区域构造变形背景与趋势;讨论了区域水平运动、应变率场分布与强震地点的关系;通过对昆仑山口西Ms8.1等地震区域水平运动与形变的分析,研究了强震过程的区域形变场变化的主要特征;提出了识别孕震形变场以进行中长期强震地点预测的思路和途径。     

天山现今地壳运动的形变场分析

对天山地区GPS测量成果进行系统处理,获得了整体天山相对于欧亚大陆的现今地壳运动的212个GPS站速度场结果,再现了受印度板块向北推挤作用下天山地区相对欧亚板块的水平构造变形分布状态。天山地区GPS速度场表明,天山地壳缩短由南向北、由西向东递减,表明板块的推挤作用力随着天山的褶皱变形相应减弱;西天山的变形强于东天山的主要原因可能是西部帕米尔高原对天山的直接俯冲推挤作用的结果;而东天山的构造活动则是塔里木块体对其缓慢推挤的结果。     

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????о???8.0????????????????????????????????????仯?????????????????????????????(TAIN)???????????????????6??GPS??????????仯??????з????????????????????????TAIN-XIAN??TAIN-WUHN?????????????????????????????????????????????????????????С???????????????????????????????????????￡??????????????????????????????????????????á?     

GiT-based structural geologic feature analysis of the southern segment of Longmenshan fault zone for earthquake evidence

The Longmenshan fault is a thrust fault which runs along the base of the Longmen Mountains in Sichuan province,southwestern China.The southern segment of the fault had two distinct responses to the Ms 8 Wenchuan and Ms 7 Lushan earthquakes.This study determines characteristics of the structural geology of the Longmenshan fault to evaluate how it influenced the two aforementioned earthquakes.This research was done within a Geoinformation Technologies(Gi T) environment based on multi-source remote sensing and crustal movement data extracted from the Global Positioning System(GPS).The spatial distribution of the southern segment of the Longmenshan fault zone was comprehensively analyzed to study both earthquakes.The study revealed that the Wenchuanand Lushan earthquakes occurred on two relatively independent faults.In addition,there was a nearly constant-velocity crustal movement zone between the two epicenters that probably had a compressive stress with slow motion.Furthermore,the central fault and a mountain back fault gradually merged from north to south.The Lushan earthquake was not an aftershock of the Wenchuan earthquake.The research showed that fault zones within 30–50 km of State Highway 318 are intensive and complex.In addition,crustal movement velocity decreased rapidly,with a strong multi-directional shear zone.Thus,activity in that zone was likely stronger than in the northern part over the medium to long term.