首都圈数字遥测地震台网单台震级偏差研究  

Study on the magnitude deviation of single station in the digital telemetered seismic network of Capital Area

作　　者：李雪英[1] 陈立强[2] 赵英萍[1] 毛国良[1] 

机构地区：[1]河北省地震局,河北石家庄050021 [2]河北省地震局承德地震中心台,河北承德067000

出　　处：《华北地震科学》2004年第3期33-39,共7页North China Earthquake Sciences

基　　金：河北省地震局青年基金项目;河北省地震局项目"大震速报质量控制研究"的资助

摘　　要：使用河北省数字遥测地震台网中心产出的观测报告,选取2002年1月～2003年7月的所有地震事件,将首都圈范围内的各台站记录到的数据检索整理,对样本数接近和超过100个的58个台站的数据进行了归类统计,计算了各台站单台震级与台网平均震级的偏差、平均偏差和标准离差,分析了产生震级偏差的原因,给出了台基校正值,校正后的震级偏差在±0.2之内的样本数达到了70%。结果显示,在震中距0～40km内,量规函数偏小。震级偏差主要来自于各台站的综合影响,进行台基校正是有意义的。The earthquake records from Jan. of 2002 to Jun. of 2003 recorded by each station in the digital telemetered seismic network of Capital Area are processed. The data in 58 stations that its sample number is over 100 are sorted, and the deviation, mean deviation and standard departure for magnitude in each single station are calculated. The cause of deviation is analyzed and the correction for each station is presented. The sample number that its deviation is within 0.2 reached 70% after correction. The results show that the gage function tends to smaller when the epicentral distance is within 0～40km. The deviation of magnitude comes mainly from the synthetical affection of each station.

关 键 词：地震台网 震级 震级偏差 统计 分析 

分 类 号：P315.3[天文地球—地震学]