【摘要】 利用广西龙滩数字地震台网记录的2006年9月—2013年7月1284次ML1.0级以上地震波形资料,采用Brune(1970)模型,通过几何扩散校正,介质衰减校正,仪器校正等将速度记录谱归算为震源位移谱,使用遗传算法计算拐角频率及零频极限,然后计算地震矩、应力降等小震震源参数,给出各种参数之间的定标关系。研究表明:地震矩、近震震级、破裂半径、矩震级和拐角频率等之间可以拟合为对数或半对数线性关系。而应力降、视应力降分布都比较零散,与地震矩、震源半径的关系并不明显,随地震矩、震源半径的变化关系比较弱。更多还原

【Abstract】 Using the Brune model and the 1284 digital seismic wave data of the earthquakes above ML1.5 occurred in Longtan reservoir from September 2006 to July 2013,which was recorded by longtan seismic network in Guangxi province,we transferred the recorded velocity spectrum into hypocentral displacement spectrum by geometry diffusion correction,dielectric attenuation correction and instrumental correction.The corner frequency and zero frequency limits were calculated by using genetic algorithm. Further,the hypocentral parameters of small earthquake including hypocentral radius and seismic moment were calculated and the relationships among them were analyzed systematically.The research results show that the relationship between seismic moment,body-wave magnitude,rupture radius and corner frequency can be fitted to Arrhenius curves log-linear or semi-log-linear.For seismic stress drop and apparent stress, they are scattered and show weak correlation with hypocenter radius and seismic moment.更多还原