摘要
通过对荣县MS4.9地震震中及附近地区地震监测、地震地质、地震活动背景和区域地震活动性的分析表明,荣县MS4.9地震震前经历了区域地震平静至活跃、再发震的过程,该序列为正常的震群型,震中区及其附近的华蓥山断裂地震带和马边地震带的震后地震学参数均正常。荣县MS4.9地震发震断裂为荣县-威远基底断裂,华蓥山断裂带及其附近地区2018年开始的5—6级地震活跃与川西地区东昆仑断裂带2017年8月九寨沟MS7.0强震的发生存在呼应关系。
Through the analysis of the earthquake sequence monitoring,seismic geology,seismicity background and regional seismicity of the epicentral and adjacent regions of the MS4.9 earthquake in Rong County,the results show that the sequence is of normal swarm type due to a silence to active process before the MS4.9 earthquake happens,Seismological parameters of the MS4.9 earthquake epicentral region and the Mt.Huaying fault zone and Mabian seismic zone are normal after the MS4.9 earthquake.It is believed that the seismogenic faults of the Rong County MS4.9 earthquake is Rong-Weiyuan base fault.The activity of the MS5—6 earthquakes on Mt.Huaying fault zone and its adjacent region since 2018 have corresponding connections with the Jiuzhaigou MS7.0 earthquake in August 2017 on the east Kunlun fault zone of the western Sichuan Province.
作者
刘成明
Liu Chengming(Zigong Earthquake Monitoring Center,Sichuan Zigong 643000,China)
出处
《地震科学进展》
2021年第8期362-370,共9页
Progress in Earthquake Sciences
关键词
荣县M_(S)4.9地震
地震监测
活动特征
成因
Rong County M_(S)4.9 earthquake
earthquake monitoring
seismicity characteristics
seismogeniccauses