In this paper , relation between the dynamic evolution feature of gravity field and strong seismicity is studied , the result shows that , regional gravity field variation enjoys inhomogeneity of spatialand temporal distribution and gravity change in different regions 摘要通过研究南北地震带及青藏块体东部地区多年来的重力场动态演化特徵及其与强震活动的关系，发现区域重力场变化既具有时空分布的不均匀性和重力变化分区现象，同时又具有与活动断裂构造密切相关并与地震孕育发展有著内在联系的特徵。
All those faults in the yellow river delta , such as chengzikou fault , shengbei fault , gubei fault , yina fault , chengzhong fault , wudi - yidu fault , gangrao - qihe fault and so on , had been researched closely and synthetically , it was found that the shengbei fault had still been an activity one since quaternary system period , thus , all those views about the inactivity of the shengbei fault was corrected too 系统研究了埕子口断裂、胜北断裂、孤北断裂、义南断裂、埕中断裂、无棣?益都断裂、广饶?齐河断裂、东营断裂等区域主要断裂的活动特征。研究发现，胜北断裂为一条第四纪以来仍有活动的断裂，纠正了以往认为胜北断裂为不活动断裂的看法。
Based on fuzzy mathematics authors have developed a fuzzy comprehensive evaluation model of earth crust stability , then divided the studied region into eight a - reas with different stability of earth crust on the basis of analysing the structure of earth crust , seismic characteristics , active faults and recent tectonic stress field 本文以模糊数学为基础，建立地壳稳定性模糊综合评价模式；然后按地壳结构、地震、活动断裂和现代构造应力场等4个方面的特征把研究区划分为8个不同稳定性的区域。
It is possible for the terminal activity faults to penetrate to the quaternary , but their scale is generally small and the penetrating distance is short , therefore , they can not induce earthquakes on a large scale . the remote sense images of last thirty years in daqing region show that the linear tectonics have not changed remarkbly , in the meantime , the earthquake timing figure shows that the probability of the faults inducing earthquakes , which ms is no less than 5 , is little , though some terminal active faults have penetrated to the quaternary 晚期活动断裂有可能断至第四系，但规模小，延伸的距离短，不会引发大规模地震，遥感解译分析表明， 30多年来卫星遥感影像显示的大型线性构造并无明显变化；另外结合大庆地区地震时序图认为，晚期活动断裂即使断至第四系，其活动引发5级以上地震的可能性也极小。
