摘要
近 10年来 ,合成孔径雷达差分干涉测量技术 (D INSAR ,DifferentialInterferometricSyn theticApertureRadar,简称 :雷达差分干涉测量 )取得了令世人瞩目的成绩 ,已成为极具有潜力的空间对地观测新技术。但如何利用D INSAR测量结果来揭示震源破裂信息 ,成为目前被关注的问题。本文简单地论述了震源位错模型的基本原理 ,并以 1998年 1月 10日张北 -尚义地震为例 ,利用差分干涉形变场图像 ,采用弹性半空间介质中的震源位错模型 ,正演了发震断层某些几何学和运动学性质。结果表明 :张北 -尚义地震破裂面属左旋逆走滑断层 ,走向SEE NWW2 72° ,倾角 4 6° ;破裂方向为由SEE至NWW的单侧破裂 ;破裂面长 9km ,宽 8km ,深度 8km ;三个方向的位移矢量分别为 :2 90mm、5 6 0mm和 0mm。
The D-INSAR(Differential Interferometric Synthetic Aperture Radar) technique has got great achievement in the world in the last ten years, it has been a new space observation technique with great potential. But how to disclose source rupture information by D-INSAR meterage result is a more concerned issue at present. The basic theory of seismic focus dislocation model is discussed. Basing on the detailed analysis of interferometric deformation field of Zhangbei-Shangyi earthquake on Jan.10,1998, and seismic focus dislocation model in elastic half-space medium. Geometry and kinematics characteristics of main seismic fault are deduced. Results show as follows:seismic break surface of Zhangbei-Shangyi earthquake is left-slip and thrust fault,strike SEE-NWW 272°;dip angle 46°; break direction is simple unilateral from SEE to NWW; length of break surface is 9km,width is 8km, and depth is 8km, displacement vector of three direction are 290mm,560 and 0mm.
出处
《中国地震》
CSCD
北大核心
2002年第2期119-126,共8页
Earthquake Research in China
基金
国家重点基础研究规划项目 (G19980 40 70 3)
国家自然科学基金 (4 980 2 0 2 7
40 142 0 31)共同资助
