CAJ | 학술논문

利用GRACE卫星重力资料,计算中国及周缘地区重力场年变化,探讨重力场年变化特点.对几次大地震前后重力场变化特征的分析显示,大地震前震源区附近会出现大范围正变化,震后逐渐转变为负异常,汶川M_s8.0地震前后的局部重力场变化也具有相同特征.研究结果表明,大地震对局部重力场影响明显,卫星重力具有探测强地震重力变化的能力.
이용GRACE위성중력자료,계산중국급주연지구중력장년변화,탐토중력장년변화특점.대궤차대지진전후중력장변화특정적분석현시,대지진전진원구부근회출현대범위정변화,진후축점전변위부이상,문천M_s8.0지진전후적국부중력장변화야구유상동특정.연구결과표명,대지진대국부중력장영향명현,위성중력구유탐측강지진중력변화적능력.
Annual gravity changes in China mainland and its vicinity are calculated from GRACE data,and the characteristics of annual changes are discussed.By analyzing the gravity changes before and after several strong earthquakes,the results show that the gravity in the epicenter zone appears positive before the earthquake and converts to negative after the shock.The calculation of the gravity before and after the Wenchuan earthquake shows the same phenomenon.It is concluded that the regional gravity field is affected by strong earthquakes,and gravity satellites have the ability of detecting gravity changes caused by strong earthquakes.