【摘要】 选取了2002—2005年天津台网记录的100个地震速报事件,利用NEDisa软件重新进行分析处理,根据定位结果对天津各台站的震级数据资料进行整理、归类分析,计算出每个地震各台站与台网平均震级的偏差和各台的多个地震的震级平均偏差。根据速度震级公式中震级的影响因素,主要从量规函数和台基两方面进行震级偏差原因分析,给出了各台的台基校正值,台基校正后震级偏差统计表。结果显示天津台网现采用的量规函数在震中距0~20 km内对震级偏差稍有影响,其他范围内影响不大;而台基对震级偏差影响较大,对天津台网各子台进行台基校正是很必要的。更多还原

【Abstract】 In the text,100 quick earthquake reports recorded by Tianjin seismic network from 2002 to 2005 are selected,and made re-analysis by use of NEDisa software.Based on the new location of the earthquakes,the magnitude deviation from average of each sub-station in Tianjing seismic network are calculated.The cause of the deviation has been studied both from standard function and ground factor of the station,then the base correction of each station and magnitude deviation after correction are given.The results show that influence of standard function adopted can be omitted except in the epicentral distant less than 20 km,while, the influence of ground factor on the magnitude deviation of each station is significant,so it is necessary to made base correction for each station in Tianjin seismic network.更多还原