基于双差定位法的“霍山窗”中小地震精定位  

Fine Location of Small and Medium Earthquakes in Huoshan Window Based on Double Difference Method

作　　者：朱厚林 陆栋梁 陶方宇 应允翔 周志 刘浩 龙剑锋[5] ZHU Houlin;LU Dongliang;TAO Fangyu;YING Yunxiang;ZHOU Zhi;LIU Hao;LONG Jianfeng(Foziling Seismological Station of Anhui Province,Lu'an,Anhui Province,237200 China;Dabieshan Earthquake Monitoring and Forecasting Experimental Field,Lu'an,Anhui Province,237000 China;Seismological Station of Mengcheng,Bozhou,Anhui Province,233500 China;Anhui Mengcheng Geophysical National Field Scientif ic Observation and Research Station,Bozhou,AnhuiProvince,233500 China;Anhui Earthquake Agency,Hefei,Anhui Province,233500 China)

机构地区：[1]安徽省佛子岭地震台,安徽六安237200 [2]大别山地震监测预报实验场,安徽六安237000 [3]安徽省蒙城地震台,安徽亳州233500 [4]安徽蒙城地球物理国家野外科学观测研究站,安徽亳州233500 [5]安徽省地震局,安徽合肥230000

出　　处：《科技资讯》2020年第27期52-55,共4页Science & Technology Information

摘　　要：基于地震双差定位法,对霍山区域测震台网所记录的2011—2015年期间,本地59次Ml≥1.0地震进行重新精定位,得到了57条地震定位结果。精定位结果显示:一方面提高了地震的定位精度,从精定位结果来看,其分布更加集中;另一方面震源深度分布更精准、科学、合理,原定位震源深度多位于5.0~7.0km之间,精定位震源深度分布于5.5~6.5km之间,近似正态分布。最后,震中位置与震源深度变化较大的震例,呈现向青山~晓天断裂和北东向落儿岭~土地岭断裂靠近的现象,体现了断裂带的运动构造特征,地震活动更加符合断裂带分布的特点。Based on the seismic double-difference positioning method,the local 59 earthquakes with Ml≥1.0 recorded in the Huoshan regional seismographs network were repositioned precisely during 2011—2015,and 57 seismic positioning results were obtained.The result of precise positioning shows that,on the one hand,the positioning accuracy of earthquake is improved,and its distribution is more concentrated.On the other hand,the source depth distribution is more accurate,scientific and reasonable.The original source depth is mostly located between 5.0~7.0km.The precise location of the source depth distribution is between 5.5~6.5km,approximately normal distribution.Finally,the earthquake cases with great changes in the location of the epicenter and the depth of the source were closer to the Qingshan-Xiaotian fault and to the North-Luoerling-Landling fault,which reflected the moving structural characteristics of the fault zone,and the seismic activity was more consistent with the characteristics of the distribution of the fault zone.

关 键 词：双差定位法 霍山地震窗 地震精确定位 震源深度 地震构造 

分 类 号：P315[天文地球—地震学]