【摘要】 采用多台多地震联合反演的方法,首先得到了新疆天山中东段地区2001年以来MS≥2.5的105次中小地震的震源谱,进而测定了地震矩、拐角频率与应力降等震源参数,并讨论了它们之间的相互关系。在此基础上开展了该研究区应力降时空变化的动态跟踪工作,最后对研究区2004年6月以前的应力降时空演化特征做了一定程度的探讨。分析表明,该地区的地震矩、拐角频率与应力降等震源参数与震级有一定的相关性,应力降的时空演化特征可以作为该地区今后地震趋势预测的一种新手段。更多还原

【Abstract】 We obtain the source spectrum of 105 M_S≥2.5 small-medium earthquakes occurred in the middle-east area of Tianshan mountain since 2001 using joint inversion method,determinate the seismic moment,corner frequency,stress drop and so on,and disscuss the relation between them.Base on it, we track the time and space change of stress drop in research region,and disscuss the evolvement characteristics of time and space of stress drop before Jun.2004.The result shows,the source parameters for example seismic moment,corner frequency and stress drop and so on is relative with magnitude,the evolvement characteristic of time and space of stress drop is a new measure for earthquake prediciton.更多还原