张家口地震台面波震级偏差分析

选取2017—2018年张家口地震台记录的748个地震，以中国地震台网中心公布的统一编目震级为标准，以多元稳健回归方法，分析其面波震级之间的关系，发现震级偏差平均值约为-0.08，总体偏差不大，且较为稳定。同时，分析震级偏差与震级大小、震中距、震中方位的关系，为今后该台地震监测能力提升提供可靠依据。

Analysis of surface wave magnitude deviation at Zhangjiakou Seismic Station

This study selects 748 earthquakes recorded by the Zhangjiakou Seismic Station from 2017 to 2018 to calculate surface wave magnitude deviations from the magnitude published by the China Earthquake Networks Center and analyze the relationship between the two surface wave magnitudes by the multiple robust regression method. It is found that the average surface wave magnitude deviation is -0.08 and the overall deviations are small and relatively stable. At the same time, the relationships between magnitude deviation and magnitude, epicentral distance, and epicenter azimuth are analyzed, which provides a reliable technical basis for improving the accuracy of monitoring and analyzing earthquakes at Zhangjiakou Seismic Station in the future.