Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Geophysics》 2016-01
Add to Favorite Get Latest Update

On the study of earthquake triggering:Solution to paradox that Coulomb stresses increase with frictional coefficients

ZHU Shou-Biao;MIAO Miao;Institute of Crustal Dynamics,China Earthquake Administration;Key Lab of Computational Geodynamics,Chinese Academy of Sciences;  
Coulomb stress change calculation has been playing an important part in investigating fault interactions and earthquake triggering.However,the results of most workers showed that Coulomb stress changes(or earthquake triggering effects)would become larger and larger with the increase of apparent frictional coefficients.This phenomenon is clearly in contradiction with our common knowledge in which frictional stress should resist fault slip and inhibit earthquakes under any circumstances.By analyzing the formula for calculating Coulomb stress changes(ACFS),we found that previous research did not take into account the additional CFS whichare only resulted from the variations of frictional coefficients.Suppose the depth of typical receiver fault is 15 km,the value of combined CFS will be as large as about 39.2MPa when the variation of apparent friction coefficient is 0.1(e.g.,from 0.3to 0.4),whereas traditional CFS is only 0.8 MPa.If we incorporated the additional CFS in calculation,the above contradiction will disappear completely.Therefore,it is suggested that we should consider changes of combined CFS due to the variation of the friction coefficient,especially when we compare different Coulomb stress models with different apparent frictional coefficients.
【Fund】: 国家自然科学基金项目(41574041);; 北京市自然科学基金项目(8152034);; 地震动力学国家重点实验室开放基金项目(LED2012B01);; 广西科技攻关项目(桂科攻1377002);; 中央级科研院所科研业务专项共同资助
【CateGory Index】: P315
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved