地震学报（英文版）
地震學報（英文版）
지진학보（영문판）
ACTA SEISMOLOGICA SINICA
2004年
6期
625-634
,共10页
陈化然%陈连旺%马宏生%李轶群%张杰卿%何巧云%王建国
陳化然%陳連旺%馬宏生%李軼群%張傑卿%何巧雲%王建國
진화연%진련왕%마굉생%리질군%장걸경%하교운%왕건국
3-D finite element model%background stress field%stress field caused by fault creep%stress field triggered by strong earthquake
Based on the latest achievement about activities of geological structure, a 3-D finite-element model containing four layers of upper crust, lower crust (two layers) and upper mantle is established in the paper. By repeated tests and revisions, the boundary conditions of the model are determined. And then the background stress field, the stress field caused by fault creep and the stress field triggered by strong earthquake in Sichuan-Yunnan region, as well as their dynamic variations are calculated. The results indicate that the latter earthquake often occurs in the area with positive Coulomb rupture stress change associated with the former one, the former earthquake has a triggering effect on the latter one to a certain extent, and strong earthquake often occur in groups under the background of high stress, which is of great significance for distinguishing seismic anomalies, as well as for improving the level of earthquake prediction.
