一、引言本文分别采用区域观测台网的DD-1和65仪器两种记录,对乌鲁木齐及附近地区的尾波衰减特征进行了初步探讨,同时,将所得结果与京津和川滇地区作了对比分析。最后,对于中强震前尾波衰减系数K及振动持续时间比τ_H/τ_V可能出现的前兆变化进行了讨论。 I. INTRODUCTION In this paper, the DD-1 and 65 instruments of the regional observatory network are respectively used to record the coda attenuation characteristics in Urumqi and its vicinity. At the same time, the results are compared with those from Beijing, Tianjin, Sichuan and Yunnan provinces Comparative analysis. Finally, the possible precursory changes of the attenuation coefficient K and the duration of vibration τ_H / τ_V before the moderate earthquakes are discussed.