【摘要】 本文首先简述了介质Q值的物理意义,及其变化可能与地震孕育和发生过程的联系;介绍了在时间域和频率域内测定Q值的常用方法;列举出我国几次大地震前后Q值变化的实例。在此基础上简要地分析了当前存在的问题,提出今后的展望。更多还原

【Abstract】 First of all,in this paper,the physical significance of Q value of media,the prop- able relationship of its variations with the processes of seismogeny and earthquake occur- rences are depicted;the routine methods for determining Q value within the time domain and frequency domain are described;some examples about Q value variations before and after several great earthquakes in China are cited.Thereafter on this basis,some curren- tly existing problems are simply analysed,and the future prospects are put forward.更多还原