判定某个地区的地震活动性是开展该区经济建设必不可少的基础工作之一。地震活动性的确定主要基于两个方面的因素:一是该区及其邻区的地震活动历史,即从历史的记载、居民的回忆和地震台站的记录等得到该区的历史地震活动数据;二是该区的地质构造特征,特别是从活动断裂的规模,变动速率和活动性质等了解断裂近期活动的特征。对海域而言,取得这两方面的资料并非易事。因为,不仅缺乏海域历史地震的记载,就连了解现今海域地震活动的确切情况也受到很大限制。另一方面,海底地质勘查远远落后于陆地的地质研究。近岸浅海区的地震活动性研究,既不同于陆地,也有别于 Determining the seismicity of a certain area is one of the basic work necessary to carry out the economic construction in this area. The determination of seismicity is mainly based on two factors: the first is the history of seismic activity in the area and its neighboring areas, that is, historical seismic activity data of the area are obtained from records of history, memories of residents and records of seismic stations Second, the geological tectonic features of the area, especially the characteristics of the recent activities of the fault from the scale, rate of change and activity of the active fault. For the sea area, getting these two aspects of information is not easy. This is because not only is there no record of historical earthquakes in the sea, but even the understanding of the exact situation of seismic activity in today’s sea areas is also greatly limited. On the other hand, seabed geological exploration lags far behind the geology of the land. The study of seismic activity in the coastal shallow sea area is different from that on land