【摘要】 流动重力方便快捷,能快速获取重力场变化信息。汶川8.0级大震后中国地震局立即开展震后重力应急监测,陕甘川交界地区重力观测显示:①汶川震后陕甘川交界的沙洲、碧口、青木川地区形成了重力变化大于60×10-8ms-2的局部重力异常区及其伴生的重力变化高梯度带,重力变化最大值达到70×10-8ms-2多,重力异常与强余震的空间分布存在密切的联系。②望褒线重力与垂直形变变化活跃,靠近断裂重力与垂直形变变化剧烈。③利用重力资料对汶川震后地震趋势进行了正确的判定。更多还原

【Abstract】 Gravity field change can be quickly obtained by convenient and efficient mobile gravity observation.CEA launched emergency monitor of post-seismic gravity after Wenchuan Ms8.0 earthquake,and the gravity observation in the boundary of Shaan-Gan-Chuan indicates: ① there are regional gravity abnormal area and accompanied high gradient zone of gravity change in the area of Shazhou,Bikou and Qingmuchuan in the boundary.Gravity change is larger than 60 gal and the maximum larger than 70 × 10-8ms-2.These show that there is a close association between gravity amorality and the space distribution of strong aftershock.② there exits obvious change in gravity and vertical deformation in the line of Wang-Bao,and the change in the area near faults is acute.③ a correct judgment had been made based on the gravity data for the earthquake trend after Wenchuan earthquake.更多还原