中国地震局地震科技星火计划项目(XH23042A )；甘肃省自然科学基本项目(22JR5RA823)；甘肃省地震局科研创新团队(2019TD-02-01 )
Based on small earthquake catalog data from 2000 to 2008 in the Longmenshan fault zone and its neighboring areas, we apply the idea of impact“superposition”of global earthquake activity(M＞7)in systematically analyzing the anomalous activity characteristics of remotely and dynamically triggered small earthquakes in the neighboring areas before a major earthquake. Results show that before the Wenchuan MS8.0 earthquake, the small earthquake activity in the Longmenshan fault zone and adjacent areas was influenced by global earthquake activity(M＞7). About one year before the MS8.0 earthquake, there were significant abnormal characteristics of small earthquake activity triggered by remote earthquakes. The reliability of calculation results was verified by using the random test method and changing the statistical parameters. The method can effectively highlight the anomalous activity characteristics of small earthquakes that are remotely and dynamically triggered on the seismogenic fault before a major earthquake, thus having some reference significance for regional strong earthquake risk assessment.
邹文轩,冯建刚.汶川8.0级地震前邻区远程动态触发小震活动异常特征研究[J].地震工程学报,2023,(1):228-234. ZOU Wenxuan, FENG Jian'gang. Anomalous characteristics of remotely and dynamically triggered small earthquake activity in adjacent areas before the Wenchuan MS8.0 earthquake[J]. China Earthquake Engineering Journal,2023,(1):228-234.复制