Assessment of earthquake location uncertainties for the design of local seismic networks

作     者：Antonio Fuggi Simone Re Giorgio Tango Sergio Del Gaudio Alessandro Brovelli Giorgio Cassiani 

作者机构：Isamgeo Italia S.r.l.Gallarate 21013Italy STOGIT S.p.A.UnitàGiacimentiCrema 26013Italy Dipartimento di GeoscienzeUniversitàdegli Studi di PadovaPadova 35131Italy 

出 版 物：《Earthquake Science》 (地震学报（英文版）)

年 卷 期：2024年第37卷第5期

页      面：415-433页

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

主　　题：network design earthquake localization detectability localization uncertainties local seismic network 

摘      要：The ability to estimate earthquake source locations,along with the appraisal of relevant uncertainties,is paramount in monitoring both natural and human-induced *** this purpose,a monitoring network must be designed to minimize the location errors introduced by geometrically unbalanced *** this study,we first review different sources of errors relevant to the localization of seismic events,how they propagate through localization algorithms,and their impact on *** then propose a quantitative method,based on a Monte Carlo approach,to estimate the uncertainty in earthquake locations that is suited to the design,optimization,and assessment of the performance of a local seismic monitoring *** illustrate the performance of the proposed approach,we analyzed the distribution of the localization uncertainties and their related dispersion for a highly dense grid of theoretical hypocenters in both the horizontal and vertical directions using an actual monitoring network *** results expand,quantitatively,the qualitative indications derived from purely geometrical parameters(azimuthal gap(AG))and classical detectability *** proposed method enables the systematic design,optimization,and evaluation of local seismic monitoring networks,enhancing monitoring accuracy in areas proximal to hydrocarbon production,geothermal fields,underground natural gas storage,and other subsurface *** approach aids in the accurate estimation of earthquake source locations and their associated uncertainties,which are crucial for assessing and mitigating seismic risks,thereby enabling the implementation of proactive measures to minimize potential *** an operational perspective,reliably estimating location accuracy is crucial for evaluating the position of seismogenic sources and assessing possible links between well activities and the onset of seismicity.