摘要
利用中国数字地震台网 (CDSN)兰州台记录的短周期数字地震资料 ,测定了尾波最大振幅与S波最大振幅之比r1 、尾波能量与S波能量之比的平方根值r2 随时间的变化。结果表明 :在永登主震 ( 1 995)和天祝 -古浪主震 ( 1 996)前 ,r1 和r2 均出现上升或下降异常变化 。
Short period digital seismic data of Lanzhou seismic station in Chinese Digital Seismic Network (CDSN) are used to measured the changed with time for ratio r 1 (maximum amplitade of code wave with S wave) and the square root of ratio r 2 (coda energy with S energy).The results show that before Yongdeng earthquake in 1995 and Tianzhu-Gulang earthquake in 1996,the r 1 and r 2 have been increased or decreased and have anomalous high and low values that deviated average value.
出处
《高原地震》
2001年第4期47-51,共5页
Plateau Earthquake Research
关键词
尾波
振幅比
能量比
P波
S波
数字地震台网
Code wave
Amplitude ratio
Energy ratio
Anomalous characteristic.
