伽师地震序列的地震波谱变化研究

利用新疆伽师震区附近的喀什、乌什、巴楚3个数字台记录到的伽师地震序列波形资料,开展地震波谱研究。首先分析了伽师6.8级地震序列各台的地震波拐角频率及其比值的时序变化特征,然后从中选出对这3个台都有较好记录的66个地震事件,进行拐角频率比时序变化特征的对比研究。结果表明,这3个台的拐角频率及其比值在伽师6.8级地震前后都出现了不同的变化趋势,尤以比值的变化更为明显,而且不同台站间的变化趋势存在较为明显的差异。最后讨论了这些差异可能存在的一些原因。

STUDY ON SEISMIC WAVE SPECTRUM OF JIASHI EARTHQUAKE SEQUENCE

We used wave datum of Jiashi earthquake sequence recorded by Kashi,Wushi and Bachu stations near the Jiashi epicenter region in Xinjiang to study the seismic wave spectrum.Firstly,we analyzed the earthquake corner frequency and time sequence characteristics of their ratio for the Jiashi MS6.8 earthquakes recorded by three stations,according to the result,we choosed 66 earthquakes recorded by 3 stations,and used them to study the time sequence change characteristics of corner frequency ratio.The result shows,different change for the corner frequency and ratio of 3 stations before and after Jiashi MS6.8 earthquake,the ratio of corner frequence are more distinct,and change trend of different stations are different.In the end,we disscussed the reason.