On the basis of the observational data, this paper also discusses the probable reasons causing the variation of the codawave attenuation rate both before and after strong events.
由观测事实出发本文讨论了地震尾波衰减率在大地震前后发生变化的可能原因。
2
The major methods of measuring Q-value by the natural earthquakes are the ones of using the data of free vibration of earth, body wave, surface wave and coda.