摘要
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.
作者
郑建常
杜宪宋
王梅
ZHENG Jianchang;DU Xiansong;WANG Mei(Shandong Earthquake Agency,Jinan 250102,China)
出处
《地震地磁观测与研究》
2022年第S01期52-55,共4页
Seismological and Geomagnetic Observation and Research
基金
中国地震科学实验场地震可预测性国际合作项目(项目编号:2018YFE0109700)。
关键词
远场面波触发
固体潮汐
应力扰动
far-field surface wave triggering
earth tide
stress perturbation