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黄海盆地是东亚大陆边缘海盆地中地震最活跃的地区之一。本文依据中国大陆地震台网记录及历史资料,获得了海域地震图像,采用集群分析法进行了地震分区与分带。1960～1994年地震资料分析显示存在两个规模宏大的地震带,第一带是北东走向,从中国苏北到朝鲜半岛中部。第二带是北西走向,从中国渤海到朝鲜半岛南部。大部分地震都落入这两个带中.地震强度低于大陆,显示出破碎的边缘海盆地地壳特征。根据中国地震台网的资料绘制了黄海—渤海地震线图,与郯庐断裂带和上海隆起等已知构造的比较表明,这些地震线是海底活断层的证据和基本特征,其中大型北东向地震线与莫霍面凹凸构造明显一致,表明地震线有深部构造背景。上述研究为海洋活断层、地震区划及地震预报提供了基础。
The Yellow Sea Basin is one of the most active earthquakes in the marginal marine basin of East Asia. Based on the seismograph records and historical data of the Chinese mainland, the seismic images of the sea area are obtained, and the seismic zoning and zoning are carried out by cluster analysis. Seismic data analysis from 1960 to 1994 shows that there are two large-scale seismic belts, the first belt is the northeast, from northern China to the central part of the Korean Peninsula. The second belt is the North West, from the Bohai Sea in China to the southern part of the Korean Peninsula. Most of the earthquakes fall into these two zones, with lower seismic intensity than the mainland, showing the crustal features of the crustal marginal basin. According to the data from China Seismological Network, the Yellow Sea-Bohai Sea seismic line map is drawn, which is compared with the known structures such as the Tan-Lu fault zone and the Shanghai Uplift. These seismic lines are the evidence and basic characteristics of the submarine active faults. Large-scale NE The seismic line coincides with the Moho concave-convex structure, indicating that the seismic line has a deep tectonic setting. The above studies provide the basis for marine active faults, seismic zoning and earthquake prediction.