The study on seismic anisotropy is one of the difficult problems in the field of geophysics nowadays.As a method of ray theory,the seismic anisotropy ray tracin
Ice cores contain an abundance of information about the Earth’s climate in the past,and recovered from shallow drilling down to 300--350 m give sufficient info
<正>Varying degree of velocity anomalies has been appeared in Shijiutuo uplift in Bohai Sea,which is mainly demonstrated in the inconsistent between seismic int