摘要
采用“区域—时间—长度算法”(简称RTL算法)对2019年10月12日发生在广西北流-广东化州交界的5.2级地震进行了回顾性检验。选取2015年10月11日至2019年10月10日中国地震台网测定的M_(L)2.0以上地震目录,根据震中附近所在区域确定选取范围:109.0°~112.0°E,20.5°~23.5°N,并以0.5°为步长,在此区间内得到49个点,分别计算各点RTL值。分析结果显示:震前震中及其南北两侧共有8个点存在RTL异常,RTL分析方法可以作为本次地震前的一项异常指标。
The regional time-length algorithm(RTL)was used to retrospectively examine the M_(s)5.2 earthquake at the boundary between Guangxi Beiliu and Guangdong Huazhou on October 12,2019.The catalogue of earthquakes above M_(L)2.0 measured by China Earthquake Networks from October 11,2015 to October 10,2019 was selected,and the selection scope was determined according to the region near the epicenter:49 points were obtained in the range of 109.0°~112.0°E and 20.5°~23.5°N with step size of 0.5°.RTL values of each point were calculated.The analysis results show that there are 8 RTL anomalies at the epicenter and its north and south sides before the earthquake,and the RTL analysis method can be used as an anomaly index before the earthquake.
作者
郑永通
李文杰
刘愫昀
王绍然
ZHENG Yongtong;LI Wenjie;LIU Shuyun;WANG Shaoran(Longyan Seismic Station,Fujian Earthquake Agency,Longyan 364000,China;Zhangping Earthquake Prevention and Disaster Reduction Center,Zhangping 364400,China)
出处
《华北地震科学》
2022年第2期97-104,共8页
North China Earthquake Sciences
关键词
RTL算法
地震
特征
检验
RTL algorithm
earthquake
characteristic
inspection