Defnode负位错模型反演结果的可靠性和稳定性分析  

ANALYSIS OF RELIABILITY AND STABILITY OF INVERSION RESULT WITH NEGATIVE DISLOCATION MODEL OF DEFNODE

作　　者：赵静[1,2] 江在森[2] 武艳强[2] 刘晓霞[2] 魏文薪[2] 王阅兵 李强[2] 徐晶[2] 

机构地区：[1]中国地震台网中心,北京100045 [2]中国地震局地震预测研究所,北京100036 [3]地壳运动监测工程研究中心,北京100045

出　　处：《大地测量与地球动力学》2013年第1期21-24,共4页Journal of Geodesy and Geodynamics

基　　金：国家十二五科技支撑计划(2012BAK19B01-06;2012BAK19B02-02)

摘　　要：利用模拟数据和实测GPS速度场,分析了断层倾角、权值f、数据空间分布等对Defnode负位错反演程序的影响。模拟数据反演结果表明,在低倾角与高倾角条件下反演结果均具有高度可靠性。龙门山断裂带实测GPS速度场反演结果表明,反演结果具有很好的稳定性,权值f对反演结果的影响微乎其微;GPS观测站点的分布(特别是断裂带附近站点的数量和位置)对反演结果有一定影响,但是没有改变龙门山断裂带南段闭锁程度相对中北段较弱的整体分布情况。Using analog data and measured GPS velocity field, we analyzed the influence of different fault dip angles, different weightf and data spatial distribution on the negative dislocation inversion program of Defnode. The inversion results of analog data show that the inversion results both have a high degree of reliability under conditions of low dip angle and high dip angle. Measured GPS velocity field inversion results of the Longmenshan fault zone show that they have good stability and the weight f has little influence on the inversion results, and the distribution of GPS observation stations （ especially the quantity and location of stations near the fault zone） has certain influ- ence on the inversion results, but it can not change the fact that the southern segment is a little less locked than the middle-northern segment.

关 键 词：Defnode负位错反演 可靠性 稳定性 龙门山断裂 断层闭锁 

分 类 号：P315.725[天文地球—地震学] P315.8[天文地球—固体地球物理学]