岫岩5.4级地震前后尾波振动持续时间比的演化特征  

STUDY ON THE EVOLUTIONARY CHARACTERISTICS OF VIBRATION DURATION RATIO OF CODA WAVE BEFORE AND AFTER XIUYAN Ms5.4 EARTHQUAKE

作　　者：曹凤娟[1] 孙文福[1] 李芳[1] 于龙伟[1] 于笑非[1] 

机构地区：[1]辽宁省地震局,辽宁沈阳110031

出　　处：《东北地震研究》2003年第3期18-23,共6页Seismological Research of Northeast China

摘　　要：本文在前人工作的基础上,从地震波的动力学特性出发,利用尾波振动持续时间比τH/τV方法,对1999年11月29日岫岩Ms5 4地震前后地震活动的演化特征进行了详细研究。结果发现在岫岩Ms5 4地震前,距震中相对较近台站记录到的尾波振动持续时间比τH/τV存在一定程度的异常显示,而距震中较远外围地区的台站记录到的τH/τV震前无明显的异常反应。认为尾波振动持续时间比τH/τV从统计意义上提供了研究介质物理性质的较好方法,对短临地震预报具有一定的参考意义。Based on the previous studies,the sesmicity evolution characteristics before and after Xiuyan earthquake Ms 54 occurred on November 29,1999 is studied in datail using the vibration duration ratio τH/τV of coda wave from dynamical characteristics of seismic waveThe result indicates that vibation duration ratioτH/τV of coda wave observed in seismic stations relatively closer to epicentre shows some precursors in a certain extent,but the τH/τV of seismic stations relatively further to epicentre show unclear anomalies,it is believed that the vibration suration ratio τH/τV of coda wave can provides a better way to study the physical characteristics of earth medium in statistical pointNo doubt it is of some singnificance to shortterm and imminent earthquake prediction

关 键 词：地震 尾波 振动 持续时间比 演化 地震预报 

分 类 号：P315.7[天文地球—地震学]