摘要
利用3种可能震后效应(震后余滑、孔隙弹性回弹、震后粘弹性松弛)的数学解析模型,分析了各种震后形变的时空分布特征,并且以1931年富蕴8级地震的震后粘弹性松弛反演为算例,说明震后粘弹性松弛解析模型的应用.分析与计算表明:震后1～2年,3种因素都发挥着很大作用:震后余滑和孔隙弹性回弹主要影响近场,粘弹性松弛影响范围较宽广;此后,震后粘弹性松弛则成为构造活动稳定地区震间形变的重要因素.
Three possible postseismic deformation analytic models for analyzing the space-time distribution of postseismic effect are constituted and the postseismic viscoelastic relaxation of the MS. 0 Fuyun earthquake in 1931 is taken as a example. It shows that all of three factors likely play important role： afterslip and poroelastic rebounds in the near-field and viscoelastic relaxation in the far-field, one to two years after the earthquake. Henceforth, the postseismic viscoelastic deformation becomes an important factor.
出处
《大地测量与地球动力学》
CSCD
北大核心
2005年第4期23-26,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40274007)
关键词
震后形变
时空分布
粘弹性松弛
震后余滑
孔隙弹性回弹
postseismic deformation, space-time distribution, viscoelastic relaxation, afterslip, poroelastic rebound
