2021年9月16日乳山海域M_(L) 2.9地震--一次远场面波触发的小震活动?

The M_(L) 2.9 earthquake in the Rushan sea area on September 16,2021-A small earthquake triggered by far-field surface wave?

大地震造成的地面运动可能在远场触发微震。通过对比检视胶东半岛地区应变仪和强震仪记录,估算2021年9月16日四川泸县M_(S) 6.0地震在该区造成的动态应力变化,从而认为其后在乳山海域发生的M_(L)2.9地震可能是受到此次泸县M_(S) 6.0地震触发的一次小震活动。

Strong earthquakes can trigger micro-earthquakes in far fields.An M_(L) 2.9 earthquake occurred in the Rushan sea area several minutes after the Sept.16,2021,Luxian M_(S) 6.0 earthquake.We examine records of strainmeters and strong motion accelerographs in the Jiaodong Peninsula and estimate the dynamic stress caused by the Luxian M_(S) 6.0 earthquake.We finally conclude that the Rushan M_(L) 2.5 earthquake might be triggered by the Luxian M_(S) 6.0 earthquake.