论文部分内容阅读
研究了云南地区各类型地震序列的早期地震波动力学特征——地震波垂直分量P波初动和P、S波最大振幅比,结果表明:前震序列振幅比为过原点的直线,比值稳定,P波初动一致;双震型地震序列在第一主震后P波初动出现一组时,仍有一类波形(“大头波”或“小头波”)的振幅比保持为过原点的直线,第一主震后P波初动出现两组时,仍有初动相同的一组地震振幅比保持为过原点的直线,或者两组初动的地震振幅比分别、共同成过原点的直线;主余震地震序列在非大震孕育期间,地震振幅比离散,与大震孕育有关的主余震地震序列振幅比仍可为过原点的直线。地震波动力学特征在上述三类地震序列的早期判断能力分别为75％、55％—73％、90％。
The early seismic wave dynamics characteristics of various types of earthquake sequences in Yunnan Province, ie, the initial P waves and the maximum amplitude ratios of P and S waves, are analyzed. The results show that the ratio of the P wave The first series of earthquakes occurred after the first mainshock and there was still a straight line whose amplitude ratio remained the same as that of the origin of the waveforms (“big wave” or “small wave”), After the first mainshock, when the P waves first appeared in two groups, there was still a straight line of the same initial set of earthquakes whose amplitudes were lower than the original straight line, or the amplitude of the first two sets of earthquake amplitudes respectively, The main aftershock earthquake sequence during the gestation period is not earthquake, the seismic amplitude ratio is discrete, and the major aftershocks related to the aftershock earthquake sequence amplitude ratio can still be the origin of the straight line. The seismic wave dynamics features are 75%, 55% -73% and 90% respectively in the early stages of the above three types of earthquake sequences.