利用GRACE重力卫星的重力场模型,计算了中国大陆及周缘地区在汶川地震前后两年的重力变化,在剔除陆地水质量变化的影响后,研究了卫星重力变化与由位错模型模拟的同震重力变化之间的关系,结果表明:卫星重力变化揭示了汶川地震对中国大陆的影响。
Using GRACE gravity field models, gravity changes in Chinese mainland and its vicinities before and after the Wenchuan earthquake are calculated. After removing the influence of water mass changes, the rela- tionship between satellite gravity variation and simulated coseismic gravity changes based on displacement theory is analyzed. The result shows that the satellite gravity indicates the impact of the Wenchuan earthquake to China ma- inland.