1) the first motion of Pg wa ve
Pg波初动
3) first motion of P-waves
[地]P波初动
4) refraction break
折射波初动
5) half period of the first arrival P wave
P波初动半周期
6) signal of first arrival
地震波初动符号
1.
Based on the data recorded in Taiyuan seismic station and its seven remote sensing substations (Yuci, Dongshan, Pingyao, Taigu, Jiaocheng, Fenyang and Jiexiu), wave velocity rate before shock, Amplitude rate, signal of first arrival, S wave attenuation and coda-duration of several moderate earthquakes are analyzed.
以山西太原遥测台网7个子台(榆次,东山,平遥,太谷,交城,汾阳,介休)和太原台十几年的地震观测资料为基础,分析几次中等地震前地震波波速比,振幅比,地震波初动符号,S波衰减率,尾波持续时间的异常。
补充资料:冲击波超压与动压