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南黄海近期发生的两次中强震震前都出现了孕震空区。它们先后存在于同一个背景空区之中,并且具有相似的动态演变过程。这种现象可能与南黄海地区强震活动的成丛性有关。认真研究背景空区和孕震空区之间的有机联系,可能是实现地震长期预报向中期预报过渡的一条途径。南黄海近期两次中强震前的地震活动性图象具有较好的可重现性,这对于该区今后的震情监视具有现实意义。
In the South Yellow Sea, two middle-strong earthquakes occurred recently that occurred in the earthquake-affected area. They exist in the same background space, and have a similar dynamic evolution. This phenomenon may be related to the cratonality of strong earthquake activity in the southern Yellow Sea. A careful study of the organic linkages between the background air space and the pregnant earthquakes may be one way to achieve the long-term earthquake prediction to the medium-term forecast. The seismic activity images before the middle-strong earthquakes in the southern Yellow Sea have good reproducibility, which is of practical significance for the monitoring of the earthquake conditions in the future.