地震地磁观测与研究2026，Vol.47Issue(3)：1-14,14.DOI:10.3969/j.issn.1003-3246.2026.03.001
山东及邻区地震活动的潮汐触发统计分析
Statistical analysis of tidal triggering of seismicity in Shandong and adjacent areas
摘要
Abstract
In this paper,Shandong and adjacent areas are divided into five tectonic subregions,and the Schuster statistical test is used to examine the correlation between seismicity and tidal body force.For 82 ML≥4.0 earthquakes with relatively reliable focal mechanism solutions,the changes in tidal shear stress,normal stress and Coulomb failure stress on the two nodal planes before and after each earthquake are calculated,and then we discussed the tidal triggering characteristics of seismicity.The results show that ML≥3.0 earthquakes in the Lubei Depression(Area Ⅰ)and ML≥4.0 earthquakes in the Luxinan Buried Uplift(Area Ⅱ)are prone to semidiurnal tidal modulation,whereas earthquakes in the Yishu Fault Zone(Area Ⅳ)and the Ludong–Yellow Sea block(Area Ⅴ)are significantly correlated with fortnightly tides.Approximately 61% of the ML≥4.0 earthquakes show tidal-stress modulation,and the slip-promoting effect is more pronounced than the slip-inhibiting effect.Among the earthquakes with a slip-promoting effect,90%are affected by tidal shear-stress loading,and 86%have strike-slip or strike-slip with normal-faulting focal mechanisms.These results indicate that the additional shear stress induced by tides may be the main mechanism of tidal triggering of seismicity in Shandong and adjacent areas,consistent with the mechanical sensitivity of strike-slip structures to tidal stress.关键词
Schuster检验/潮汐应力/震源机制解/山东及邻区Key words
Schuster test/tidal stress/focal mechanism solution/Shandong and adjacent areas引用本文复制引用
李霞,郑建常,徐长朋,李冬梅..山东及邻区地震活动的潮汐触发统计分析[J].地震地磁观测与研究,2026,47(3):1-14,14.基金项目
山东省地震局人工智能地震监测预测科研团专项 （）
山东省地震局科研项目(项目编号:YB2501) （项目编号:YB2501）
