华南地震2016，Vol.36Issue(4)：14-19,6.DOI:10.13512/j.hndz.2016.03.003
信宜-廉江断裂地震活动状态分析
Analysis on Stress State in Xinyi-Lianjiang Fault Area
摘要
Abstract
Using the seismic data recorded by the Guangdong and Guangxi regional seismic network from January 1st,1972 to March 31st,2016,the paper obtained the spatial distribution of several seismicity parameters (including a and b values in the frequency-magnitude relationship,and the local recurrence intervals TL) in Xinyi-Lianjiang fault and its surrounding area to discuss the stress state in the fault.The results show that:the spatial distribution of several seismicity parameters was significantly heterogeneous in the fault area.The Beibu Gulf area in the southwest section of the fault had the characteristic of the low b-value,low avalue,and the shortest recurrence intervals TL.All these implied that this section of the fault might have been locked under the high stress and more likely to generate moderate-strong earthquakes.The stress state and the degree of locking in the central section of fault,where it is the intersection of Xinyi-Lianjiang fault and Suixi fault,were lower than Beibu Gulf section.Because it was the intersection of two faults,the stress tiggering on Xinyi-Lianjiang fault from the moderate-strong earthquakes in Suixi fault could not be ignored.There were a lot of small earthquake in Gaozhou reservoir area,and its stress release was mainly based on the small earthquake activity.关键词
地震活动性参数/信宜-廉江断裂带/应力状态/闭锁Key words
Seismicity Parameters/Xinyi-Lianjiang Fault/Stress State/Locking分类
天文与地球科学引用本文复制引用
黄元敏,杜龙,邵叶,王振亚..信宜-廉江断裂地震活动状态分析[J].华南地震,2016,36(4):14-19,6.基金项目
中国地震局“2016年度震情跟踪定向工作任务”(2016010111)、湛江市地震局“粤桂琼交界地区未来5年地震趋势及对策研究”项目资助 （2016010111）
