The related data of GPS networks in the Chinese mainland and its peripheral areas collected from internet sites in the paper.And various data fusion methods are presented based on the collected GPS data.Thus the unifi...The related data of GPS networks in the Chinese mainland and its peripheral areas collected from internet sites in the paper.And various data fusion methods are presented based on the collected GPS data.Thus the unified horizontal crustal velocity fields can be established in Chinese mainland and its peripheral areas.The available data of 423 GPS sites are applied to the velocity fields and its area gets to 1.2×107.By analyzing the velocity fields ,the basic spatial distribution feature of the horizontal crustal motion in the Chinese mainland and its peripheral area can be obtained preliminarily.Meanwhile,the range of the velocity fields in the Chinese mainland affected by the collision force of India plate to Eurasia plate and the problem of principal direction of the force from India plate are discussed.展开更多
基于融合的GPS速度场结果,使用DEFNODE负位错反演程序估算了喜马拉雅主逆冲断层(the main Himalayan thrust,MHT)的闭锁程度和滑动亏损空间分布,并结合剖面结果分析了断层远、近场的运动特征。结果表明,MHT的闭锁深度基本达到18~24km,...基于融合的GPS速度场结果,使用DEFNODE负位错反演程序估算了喜马拉雅主逆冲断层(the main Himalayan thrust,MHT)的闭锁程度和滑动亏损空间分布,并结合剖面结果分析了断层远、近场的运动特征。结果表明,MHT的闭锁深度基本达到18~24km,断层面闭锁宽度达到102~136km,两次历史大地震破裂区域之间的未破裂段落和未发生大地震的段落闭锁深度更深,闭锁断层面更宽,2015年尼泊尔Mw7.8大地震就发生在两次大地震破裂区域之间的段落;MHT总滑动亏损速率和垂直断层挤压滑动亏损速率自东向西逐渐减小,平行断层右旋滑动亏损速率则基本上自东向西逐渐增加;MHT 3条剖面拟合结果也反映出其存在很强的闭锁。根据估算的此次Mw7.8地震的复发周期230年和最近500多年发生的大地震分布,认为MHT整条段落尤其是尼泊尔西部与印度接壤处和可能还没有破裂的不丹地区依然有发生8级大地震的危险。展开更多
基金State Key Basic Development and Program Project(G09980407).
文摘The related data of GPS networks in the Chinese mainland and its peripheral areas collected from internet sites in the paper.And various data fusion methods are presented based on the collected GPS data.Thus the unified horizontal crustal velocity fields can be established in Chinese mainland and its peripheral areas.The available data of 423 GPS sites are applied to the velocity fields and its area gets to 1.2×107.By analyzing the velocity fields ,the basic spatial distribution feature of the horizontal crustal motion in the Chinese mainland and its peripheral area can be obtained preliminarily.Meanwhile,the range of the velocity fields in the Chinese mainland affected by the collision force of India plate to Eurasia plate and the problem of principal direction of the force from India plate are discussed.
文摘基于融合的GPS速度场结果,使用DEFNODE负位错反演程序估算了喜马拉雅主逆冲断层(the main Himalayan thrust,MHT)的闭锁程度和滑动亏损空间分布,并结合剖面结果分析了断层远、近场的运动特征。结果表明,MHT的闭锁深度基本达到18~24km,断层面闭锁宽度达到102~136km,两次历史大地震破裂区域之间的未破裂段落和未发生大地震的段落闭锁深度更深,闭锁断层面更宽,2015年尼泊尔Mw7.8大地震就发生在两次大地震破裂区域之间的段落;MHT总滑动亏损速率和垂直断层挤压滑动亏损速率自东向西逐渐减小,平行断层右旋滑动亏损速率则基本上自东向西逐渐增加;MHT 3条剖面拟合结果也反映出其存在很强的闭锁。根据估算的此次Mw7.8地震的复发周期230年和最近500多年发生的大地震分布,认为MHT整条段落尤其是尼泊尔西部与印度接壤处和可能还没有破裂的不丹地区依然有发生8级大地震的危险。
