邵武-河源断裂带中段重磁、垂直形变场特征及其与地震的关系

The Characteristics of Grevitational/geomagnetic Field and Vertical Deformation Field and It's Relations with Earthquake in the Middle Segment of Shaowu-Heyuan Fault

综合利用流动重磁和流动跨断层短水准复测资料,分析了邵武-河源断裂带中段重磁场和地壳形变场的时空强变化特征。结果表明:地磁场的变化与监测区的地震活动有较好的对应关系,在震源区附近会出现重力场变化的异常梯度带;断裂两盘垂直形变受区域断裂控制,其差异性变化有指示局部地区孕震活动的作用。

With the analysis of gravity/geomagnetic observation and cross-fault leveling data in the middle segment of Shaowu-Heyuan fault zone,the characteristic of the gravitational/geomagnetic field and crustal deformation field are discussed.It shows that there is a better correspondence between the geomagnetic field changes and seismological activity,there are gravitational field abnormal gradient in the vicinity of the epicenters.Fault vertical deformation is controlled by the regional fault and the variation differences denote the seismological activities in some areas.