广西北流M_S5.2地震测震学异常研究

Research on Seismological Anomaly of Guangxi Beiliu M_S5.2 Earthquake

2019年10月12日广西北流发生5.2级地震,震源深度10 km,该地震的发生,标志着东南沿海地震带已经进入第5活跃幕。在收集北流地震前广西及邻区地震地质和地震活动资料基础上,较系统地分析了此次地震序列和测震学指标异常的特征,结果显示:北流5.2级地震属前-主-余型地震序列,震前存在地震活动性异常。为广西地区强震震后趋势判断、震前预测提供依据。

On October 12,2019,an earthquake of MS5.2 occurred in Beiliu county,Guangxi province,with the focal depth of 10 km.The occurrence of the earthquake indicates that the southeast coastal seismic belt has entered the 5 th active stage.In this paper,based on the seismic geological and seismic activity data of guangxi and adjacent areas,the characteristics of the earthquake sequence and seismograph anomalies before the earthquake were analyzed systematically.The results shows that:the Beiliu MS5.2 earthquake sequence belongs to front main redundant earthquake sequence,there is abnormal seismicity before the earthquake.It provides the basis for the trend judgment and prediction before the strong earthquake in Guangxi.