采用Schuster检验方法,以潮汐体应力为计算量,对河北及邻区中小地震活动受固体潮触发情况进行日尺度及月尺度检验。研究结果显示,不同区域呈现不同的固体潮调制特征,晋冀蒙交界区域的地震活动受半月潮调制作用较为显著,冀鲁豫地区的地震活动受半日潮作用较为显著,而京津唐地区的地震活动与固体潮汐之间的相关性较小。不同区域、不同时段地震受潮汐触发的震级有所不同,同一区域不同时段、不同震级的地震活动呈现不同的固体潮调制特征。

A statistical analysis of earthquake activity triggered by earth tides in Hebei Province and its adjacent areas was conducted using Schuster's test on both daily and monthly scales,with tidal body stress as the basis for calculations. The results indicate that different regions exhibit distinct characteristics of earth tide triggering. In the boundary area of Shanxi,Hebei,and Mongolia,seismic activity is significantly triggered by earth tides on a monthly scale. In contrast,in the Hebei,Henan,and Shandong areas,seismic activity is significantly triggered on a daily scale. However,the correlation between earth tides and seismic activity in the Beijing-Tianjin-Tangshan area is minimal. Additionally,earthquakes in different regions and at different times are triggered by earth tides of varying magnitudes. Seismic activity of different magnitudes during different time periods within the same region also shows varying triggering characteristics related to earth tides.

P315

地震预测开放基金(HX22029D)、河北省地震科技星火计划项目(DZ2021121500009)共同资助