A Porites lutea core from Yongshu Reef of Nansha Islands covering 50_year growth history is analyzed for carbon isotopic composition with monthly and seasonal r
On 10 January, 1998 an earthquake of Ms=6.2occurred in the Zhangbei-Shangyi region of North China.The surface seismic deformation was measured in the previous s
The parameters of Earth free core nutation (FCN) are two relatively significant geophysical parameters. Sasao et al. (1980) and Wahr and Bergen (1986) provided