摘要
Focusingontheb-valueastheresearchtargetandunderthetheoreticalframeworkthattheb-valueisdeterminedbystressstateandmediumproperties,thevariationcharacteristicsoftheb-valueintheHetaoseismicbeltareanalyzed.EarthquakeswithML≥1.5,whichhaveoccurredintheHetaoseismicbeltsince1970areselectedtoconductthequantitativedetectionofthenon-uniformtemporalchangeofMcusingtheEMRmethod.Basedontheactualsituationofseismicactivity,thelowerlimitmagnitudeissetasML2.0tocalculatetheb-value.Thetemporalvariationoftheb-valueiscalculatedandscannedusingtheleastsquaremethod.Theresultsshowthatthereisagoodcorrespondingrelationshipbetweenthetemporalvariationoftheb-value,strongearthquakeactivity,networkdistributionandaftershockdeletion.Wealsocalculateandscanthespatialvariationoftheb-valuebyusingmaximumlikelihood.Theresultsshowthatthespatialdifferenceispossiblycausedbystressstateandcrustalmediumproperties.Thetectonicdependenceoftheb-valueisobvious.Inaddition,thesufficientearthquakessamplesineachmagnitudeintervalarestillakeysteptoimprovethecalculationaccuracyoftheb-valuevaluebyusingmaximumlikelihood.Theresultsshowthatthespatialdifferenceispossiblycausedbystressstateandcrustalmediumproperties.Thetectonicdependenceoftheb-valueisobvious.Inaddition,thesufficientearthquakessamplesineachmagnitudeintervalarestillakeysteptoimprovethecalculationaccuracyoftheb-value
出版日期
2017年04月14日(中国期刊网平台首次上网日期,不代表论文的发表时间)