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本文使用了渤海沿岸8个验潮站50年代以来的平均潮位资料,尝试通过多次平均和周期图等分析方法来消除各种周期及非周期因素的影响,力求显示出地壳垂直形变的贡献。结果表明,渤海沿岸的海平面变化不仅具有丰富的地质构造活动信息,而且可能反应较大地震前后的地壳形变过程。提取海平面地壳垂直形变信息对较大地震的预报和与海洋有关灾害的预测等有积极意义。
In this paper, the average tidal level data of eight tide gauge stations along the coast of the Bohai Sea since the 1950s are used to try to show the contribution of vertical crustal deformation by eliminating the influences of various periodic and non-periodic factors by means of multiple averaging and periodic graph analysis. The results show that the sea level change on the coast of Bohai Sea not only has rich information of geological tectonic activity, but also may reflect the crustal deformation before and after the earthquake. Extracting vertical deformation information of sea level crust is of great significance for forecasting large earthquakes and predicting marine disasters.