【摘要】 对广东数字遥测地震台网记录到的新丰江ML4 9级地震及前后小地震的波形资料作了频谱分析 ,结果表明 ,主震前 ,新丰江地区小震的纵、横波位移谱的拐角频率比值fc(P) /fc(S)为 1 51左右 ;主震后下降到 1 3左右 ;新丰江地区小震的纵、横波位移谱的拐角频率比的统计平均值为 1 4 1。同时还测定了前、余震系列的应力降、地震矩、震源尺度及平均位错等震源参数更多还原

【Abstract】 The seismic waveform spectral analyses were made with data of Xinfengjiang earthquake series around M L4 9 recorded by GDDSN. The values of f c(p)/f c(s) are about 1 51 before the main shock and decrease to 1 30 after the main shock. Their average is about 1 41.The stress drop, moment, focal size, average dislocation and other parameters of each earthquake are gotten too.更多还原