CAJ | 학술논문

采用安徽区域数字地震台网记录的安庆4.8级地震序列波形资料,开展地震波谱研究,求取了零频位移谱值、应力降和地震矩等震源参数。分析了纵、横波零频谱值比和应力降随时间的变化趋势,并讨论了震源参数之间的关系。结果表明,安庆4.8级主震后,纵、横波零频位移谱值比和应力降呈现一定的变化规律,可为主震—余震序列的最大余震的预测提供一定的参考依据,同时发现震源参数与震级有一定相关。
채용안휘구역수자지진태망기록적안경4.8급지진서렬파형자료,개전지진파보연구,구취료령빈위이보치、응력강화지진구등진원삼수。분석료종、횡파령빈보치비화응력강수시간적변화추세,병토론료진원삼수지간적관계。결과표명,안경4.8급주진후,종、횡파령빈위이보치비화응력강정현일정적변화규률,가위주진—여진서렬적최대여진적예측제공일정적삼고의거,동시발현진원삼수여진급유일정상관。
The seismic spectrum is analyzed by using Anqing M4.8 earthquake sequence data recorded by Anhui Digital Seismic Network,the zero sequence of displacement spectrum,stress drop and seismic moment are calculated.The variation of the ratio value of zero sequence of displacement spectrum and stress drop with time are analyzed,and the relationship between focal parameters are discussed.The results show that the ratio value of zero sequence of displacement spectrum and stress drop varied regularly after Anqing M4.8 mainshock,which is the reference of the largest aftershock prediction of main aftershock sequence.Meanwhile,the focal parameters are correlated with magnitude.