摘要
顾及地球结构的非均匀性、分层和球体特性,定量研究了球体分层模型、球体均匀模型、半空间均匀模型分别作用于地震断层(走滑断层,逆冲断层)产生的地表同震变形的差异。计算结果显示,相对实际地球模型,利用半空间均匀位错模型计算的同震变形差异很大,大大超出现有高精度测量技术的精度。如果利用实测资料(例如GPS,VIBL,InSAR等高精度测量数据)进行反演研究,必须根据实际地壳构造情况考虑地壳分层结构的影响。
Considering the inhomogeneousness, stratified and spherical characteristic of earth structure, the co-seismic deformation difference among spherical earth layering model, spherical homogeneous model and half-space homogeneous model has been studied in this paper. The quantitative difference due to the influence by the crustal layering and earth curvature have also been calculated out and compared. The calculation results show that the surface co-seismic deformation difference is so large that exceeding the accuracy of high precise observation technology if not considering the actually earth structure when just taking the earth as half-space homogeneous medium. If one wants to use the high accurate observation data (such as GPS, VIBL, InSAR observations) to do the inversion research, the effect from the stratified crustal structure can not be ignored.
出处
《大地测量与地球动力学》
CSCD
北大核心
2005年第3期39-44,49,共7页
Journal of Geodesy and Geodynamics
基金
新世纪优秀人才支持计划(NCET-04-0681)
湖北省青年杰出人才基金(2002AC011)
国家自然科学基金(40344023)
地球空间环境与大地测量教育部重点实验室开放研究基金(测绘基础研究)(020908
905276031-04-08)
中国科学院动力大地测量学重点实验室基金(L04-02)
关键词
球体分层模型
球体均匀模型
半空间均匀模型
同震变形
差异性
earth's layered model, earth's homogeneous model, half-space homogeneous model, co-seismic deformation, difference