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采用聚类分析方法，研究了渤海、黄海及沿岸强震（ Ｍ ≥６）的空间分布。研究结果划分出了强震活动区及一些离散发生的强震。渤海的强震往往参与河北、山东、辽宁沿岸的强震分期、分区活动，且以强度高为特征；南黄海强震区自成体系，存在多期活动，与沿岸强震关系不大，以频度高为特点；北黄海内呈弱活动区的状态；朝鲜半岛强震独立成区，未向黄海内部延伸。文中给出分区的构造解释，并提出海域强震存在时空差异，在沿岸及海洋的防震减灾中应取不同的对策
The cluster analysis method was used to study the spatial distribution of strong earthquakes (M ≥ 6) in the Bohai Sea, the Yellow Sea and the coast. The results of the study have been divided into strong seismic activity areas and some discrete strong earthquakes. The strong earthquakes in Bohai Sea often participate in the staging and zoning activities of strong earthquakes along Hebei, Shandong and Liaoning coasts and are characterized by high intensity. The spontaneous systems in the strong earthquakes in the South Yellow Sea have multiple periods of activity, which have little to do with the strong earthquakes along the coast High frequency is characterized by the northern Yellow Sea was weak activity zone state; Korean Peninsula strong earthquake into a separate area, did not extend to the interior of the Yellow Sea. The structural interpretation of zoning is given in this paper, and the space-time difference of strong earthquakes in the sea is proposed. Different countermeasures should be taken in the prevention and control of earthquakes and disasters along the coast and sea