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《Progress in Geophysics》 2006-02
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The characteristics of velocities with azimuth variation for arbitrary spatial orientation TI media

HAO Chong-tao,YAO Chen,WANG Xun(Institute of Geology,China Seismological Bureau,Beijing 100029,China)  
Based on the method of coordinates transform for arbitrary spatial orientation TI media,we expanded to study the azimuth variations of body-wave phase-velocity and group-velocity for arbitrary spatial orientation TI media with arbitrary strength of anisotropy.Using simulating calculation,we obtained the patterns of phase-velocity and group-velocity,and analyzed the deviation between group-velocity and phase-velocity.This research illustrates that the stronger is anisotropy the larger is the deviation between group-velocity and phase-velocity.The spatial orientation of TI symmetry axis and surveying line azimuth has the effect on the azimuth variation of body-wave velocities.The patterns of body-wave group-velocity and phase-velocity are fixed relative to TI symmetry axis,and exhibit certain symmetry and repetition with azimuth variation.This result can be directly predicted the azimuth variation of body-wave velocities for arbitrary spatial orientation TI media.Hence,this research benefits the data processing and interpretation of seismic anisotropy.
【Fund】: 国家自然科学基金项目(40174020)资助
【CateGory Index】: P631.41
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