Research on Frequency of the Aftershock Sequence of the Wenchuan Earthquake Based on Coseismic Coulomb Stress Change-中国期刊网

摘要 BytheaftershockfrequencyestimationmethodbasedonthecalculationofcoseismicstaticCoulombstresschangesandrate-andstate-dependentfaultconstitutivelaw,wecalculatethefrequencyof"direct"aftershocksoftheWenchuanearthquakerelatedtocoseismicstaticCoulombstresschangesinitsaftershockzoneandtheareasnearby.Itshowsthatthefrequencyissignificantlylowerthanthetruthinthemainrupturezone,especiallyinthesouthernrupturezone,duetothedecreaseofstresslevelontheruptureplaneofthemainshockresultingfromcoseismicCoulombstresschange.ThestudyalsoshowsthattheeffectoftheCoulombstresschangeonthedurationofaftershockactivityisassociatedwiththelowerlimitmagnitude.Thedurationisabout15-16monthsforaftershocksaboveML4.0,andcloseto60monthsforaftershocksaboveML3.5.Inthisperiod,theratioofthe"direct"aftershockscausedbycoseismicCoulombstresschangerangesbetween44.7%to48.6%,whichsuggeststhat,eveninthe"effective"periodofcoseismicCoulombstresschanges,abouthalfoftheaftershocksonthemainshockruptureplaneareindependentofcoseismicCoulombstresschanges.Itispointedoutthatthoseaftershocksmayberelatedtotheaftersliportheviscoelasticrelaxation,whicharetimedependentcases.

1Cheng Wanzheng Ruan Xiang Qiao Huizhen Zhang Zhiwei Zhang Yongjiu. Research on the Dynamic Change of Regional Stress Fields before the Ms8.0 Wenchuan Earthquake.地震学,2009-03.
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.
3Wei Yang;Hongkui Ge;Baoshan Wang;Jiupeng Hu;Songyong Yuan;Sen Qiao. Active source monitoring at the Wenchuan fault zone： coseismic velocity change associated with aftershock event and its implication.地震学,2014-06.
4Liu Chun;Wu Zhongliang;Jiang Changsheng. Ground Truth Events -Application to the 2008 Wenchuan Aftershock Sequence.地震学,2008-04.
5Wang 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.
6Chen Yanan;Jiang Haikun. 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.地震学,2015-04.
7秦嘉政;钱晓东;张俊伟;谢庆茵. The space and time distribution characteristics of the shear stress field for the sequence of the Wuding earthquake.地震学,2000-01.
8Mengkui Li;Shuangxi Zhang;Chaoyu Zhang;Yu Zhang. Fault Slip Model of 2013 Lushan Earthquake Retrieved Based on GPS Coseismic Displacements.地质学,2015-04.
9YAN Zhaokun;LI Yong;SHAO Chongjian;ZHOU Rongjun;YAN Liang;ZHAO Guohua;YAN Binglei. Interpreting the Coseismic Uplift and Subsidence of the Longmen Shan Foreland Basin System during the Wenchuan Earthquake by a Elastic Flexural Model.地质学,2016-02.
10Zhoumin Xie;Caibo Hu;Yongen Cai;Chi-yuen Wang. Effect of Poisson＇s ratio on stress state in the Wenchuan Ms8.0 earthquake fault.地震学,2009-06.

Research on Frequency of the Aftershock Sequence of the Wenchuan Earthquake Based on Coseismic Coulomb Stress Change

来源期刊

相关推荐

同分类资源更多

相关关键词

Research on Frequency of the Aftershock Sequence of the Wenchuan Earthquake Based on Coseismic Coulomb Stress Change

来源期刊

相关推荐

同分类资源 更多

相关关键词

同分类资源更多