粤东地区跨断层形变异常强度特征分析  

Analysis on Intensity Characteristics of Cross-fault Deformation Anomaly in Eastern Guangdong

作　　者：郜怀龙 李翀 廖桂金[1] 单和秋[1] GAO Huaiong;LI Chong;LIAO Guijin;SHAN Heqiu(Guangdong Earthquake Agency,Guangzhou 510070,China)

机构地区：[1]广东省地震局,广州5100701

出　　处：《华南地震》2023年第2期46-55,共10页South China Journal of Seismology

基　　金：国家自然科学基金(U1901602);广东省科技计划项目(2019B020208014);南方海洋科学与工程广东省实验室(珠海)创新团队项目(99147-42080024)联合资助。

摘　　要：对粤东地区“榕江断裂”和“博美—潮安—三饶断裂”的跨断层形变数据进行整理。在形变趋势累计的基础上,进一步对形变速率处理方法改进,解算出跨断层形变异常强度值,并做归一化处理。将形变异常强度指标引入至流动跨断层测量资料的处理分析中,应用于跨断层形变曲线的异常辅助识别,并结合粤东地区震例开展对比研究。分析发现粤东地区地震多发在异常强度高或者由高降低的时段内,对粤东地区的地震前兆识别有一定指示意义。The cross-fault deformation data of"Rongjiang fault"and"Bomei-Chao′an-Sanrao fault"in eastern Guangdong were sorted out.On the basis of the cumulative deformation trend,the deformation rate processing method is further improved,and the abnormal intensity value of cross-fault deformation is calculated and normalized.The abnormal intensity index of deformation is introduced into the processing and analysis of flow cross-fault measurement data,which is applied to the abnormal auxiliary identification of cross-fault deformation curve,and the comparative study is carried out with the earthquake cases in eastern Guangdong.It is found that earthquakes in eastern Guangdong occur frequently in the period of high abnormal intensity or decrease from high,which has certain indicative significance for earthquake precursor identification in eastern Guangdong.

关 键 词：粤东地区 跨断层形变 形变异常强度 前兆异常 

分 类 号：P315.7[天文地球—地震学]