数字图像分析在地震定位数据中的应用

针对地震分布点状图不能有效地显示复杂震源区地震构造的几何形态问题,利用网格化插值和二维小波变换方法处理了地震定位数据,得到震源空间分布图像和发震时间图像.对图像进行分析可以更直观地反映地震构造走向、倾向和发震时间的平面分布特征.将方法应用于实际资料的处理,并且对研究区的图像进行了地震构造解释.结果表明,研究区发震构造时间和空间特征为明显的北西方向,另外还存在断续的北东向特征,与该区域地质构造和其他资料分析结果较为一致.

Application of digital image analysis in the location of hypocenter

In order to solve the problem of earthquake distribution point-diagram.no effectively displaying the 3D geometry of the seismic structure in complex hypocenter area,gridding interpolation and 2-D wavelet transformation are used for processing hypocenter location data,and spatial hypocenter distribution image and seism starting time image are obtained.The images display the strike direction and the dip direction of seismic structure and the plane distribution character of seism starting time.The factual seismic data is processed using this method,and the images of the studied area are interpreted.The result shows the time and spatial features of the seismic structure present obvious NW strike and discontinuous NE strike.And this result relatively accords with the geologic structure of this area and the analysis results according to other data.