Using Gravity Data to Compute Crustal Thickness of East China Sea and Okinawa Trough

Using gravity data and results of seismic survey of East China Sea, we computed crustal thickness of the study area. Features of crustal structure of the area were analyzed. According to contrast with geophysical fields and crustal structure of eastern of China, we indicated that continental shelf of East China Sea should be nature extend of Chinese Mainland. Character of crust of Okinawa Trough was discussed. We pointed out that Okinawa Trough should be nature finality of continental shelf of East China Sea.