【摘要】 使用中国地震台网全面完成数字化之后(2008—2012年)的观测资料,对中国地震台网和美国地震台网测定的面波震级从震级大小、震中距、震源深度和震中方位进行对比分析。从对比结果看:数字化之后,中国地震台网测定的MS及MS7同美国地震台网测定的MSZ之间存在一定系统偏差;震源深度对震级偏差基本没有影响;震中距对震级偏差有一定影响,具体表现为随着震中距的增加,中国地震随之偏大,尤其以震中距大于105°的地震明显;4象限分布对偏差有一定影响,具体表现为MS为第Ⅳ象限出现偏差异常,MS7为第Ⅲ象限出现偏差异常。更多还原

【Abstract】 Using the observation data recorded by the digitized China Earthquake Network(2008-2012),we contrasted and analyzed surface wave magnitude between CENC and NEIC from magnitude size, distance, depth and azimuth. The compare results show that, after digitization, surfacewave magnitude MS and MSZ determined by CENC has some systematic difference from MSZ determined by NEIC;hypocenter depth has little influence on magnitude deviation;whereas distance has some influence on magnitude deviation, for specific performance, with distance increase, the magnitude determined by CENC increase, especially where distance more than 105 °;azimuth has some infl uence on magnitude deviation that MS is abnormal on Ⅳ quadrant and MS7 is abnormal on Ⅲ quadrant.更多还原