On Estimating Magnitude of a Maximum Sequent Earthquake by Viscoelastic Coulomb Stress Change and a Discussion of the Relationship between the M_S7.3 Earthquakes in Yutian 2008 and 2014-中国期刊网

摘要 OnthebasisofthepreviousstudiesofthelayeredcrustalmodelintheYutianarea,combinedwiththefieldGPScontinuousobservationdata,weroughlyestimatetheviscouscoefficientofeachlayer.Withtheviscoelastichorizontallayermodel,wecalculatetheviscoelasticco-seismicCoulombstresschangecausedbytheYutianM_S7.3earthquakes2008and2014respectively.BasedontheCoulombstresschange,usingthecalculationmethodof"direct"aftershockfrequency,wecomeupwiththetheoreticalearthquakefrequencydirectlyrelatedtothemainshockandtheco-seismicCoulombstresschangeinthestudyarea.Thenweputforwardamethod,basedonthecomparisonoftheoreticalandactualearthquakefrequencyorthecomparisonbetweentheoreticalandpracticalearthquakefrequency-distancedecaycurvefittingresiduals,toestimatethemagnitudeofamaximumsequentearthquake,directlyrelatedtothemainshockco-seismicCoulombstresschange.Resultscalculatedbydifferentmethodsshowthatthemaximumfollow-upearthquakemagnitudecausedbythecoseismicCoulombstresschangeliesfromM_S7.2toM_S7.5followingYutianM_S7.3earthquakein2008;butthatofthe2014YutianM_S7.3earthquakeisM_S6.3.TheformerisveryclosetotheYutianM_S7.3earthquakein2014.Becauseofthesamemagnitude,relativelyclosespatialdistance,shorttimeinterval,thesameregionoftheexternalforce,thestrongcorrelationbetweentwoseismictectonicandaclearstressinteraction,wethusconsiderthatthetwoYutianM_S7.3earthquakesin2008and2014constituteapairofgeneralizeddoubleshocktypeearthquake.Thisisconsistentwiththesequencetypecharacteristicofpast"doubleshock"earthquakesintheregion.Inthispaper,theinfluenceofthemagnitudelowerlimitandtheb-valueintherelationshipofG-Rontheresultsisdiscussed.Asaresult,whentheviscoelasticcoseismicCoulombstressvariationisdetermined,thelowerlimitofmagnitudehaslittleeffectonthemaximumsequentearthquakemagnitude

1Cheng Jia;Liu Jie;Sheng Shuzhong;Yao Qi;Liu Daiqin. Tectonic Background of the Yutian Ms 7.3 Earthquake in 2014 and Its Relationship with the Yutian M_S 7.3 Earthquake in 2008.地震学,2015-01.
2Wang Liwei;Chen Qifu. Uncertainty Analysis of Static Coulomb Stress Change Induced by Earthquake-A Case Study on the 2008 M_S8.0 Wenchuan Earthquake.地震学,2012-01.
3Zhang Hongzhi;Diao Guiling;Zhao Mingchun;Wang Qincai;Zhang Xiao;Huang Yuan. Discussion on the Relationship between Different Earthquake Magnitude Scales and the Effect of Seismic Station Sites on Magnitude Estimation.地震学,2008-01.
4Wang Shaowen;Zhan Wenhuan;Zhang Fan;Zhu Junjiang. The Coulomb Stress Change Associated with the Taiwan Straits Ms 7.3 Earthquake on September 16, 1994 and the Risk Prediction of Its Surrounding Faults.地震学,2013-01.
5Song Xiuqing;Miao Fajun;Liu Shuangqing;Chen Xiangjun;Wang Jun;Zhu Yuanqing. Focal Depth Determination of the 2014 Yutian MS 7.3 Earthquake Sequence, Xinjiang.地震学,2014-04.
6Meng Lingyuan;Zhou Longquan;Shi Haixia. A Study on the Characteristics of the Yutian, Xinjiang Ms 7.3 Earthquake, February 12,2014.地震学,2015-01.
7Jia Ruo;Jiang Haikun. Research on Frequency of the Aftershock Sequence of the Wenchuan Earthquake Based on Coseismic Coulomb Stress Change.地震学,2015-01.
8LIU Fang;SU Riya;XU Xiquan;LI Hui;NA Re. The Conversion Relationship between the Local Earthquake Magnitude and Surface Wave Magnitude in the Inner Mongolia Digital Seismic Network.地震学,2019-01.
9梅世蓉;薛艳;尹京苑. Relationship between the earthquake sequences of Tangshan and Xingtai and the three dimensional velocity structure──Discussion on predicting strong earthquakes of swarm-type.地震学,1999-02.
10Li Jin;Wang Qiong. Analysis on Characteristics of Focal Mechanisms for the MS7.3 Yutian Earthquake Sequence of February 12,2014.地震学,2015-04.

On Estimating Magnitude of a Maximum Sequent Earthquake by Viscoelastic Coulomb Stress Change and a Discussion of the Relationship between the M_S7.3 Earthquakes in Yutian 2008 and 2014

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On Estimating Magnitude of a Maximum Sequent Earthquake by Viscoelastic Coulomb Stress Change and a Discussion of the Relationship between the M_S7.3 Earthquakes in Yutian 2008 and 2014

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