【摘要】 选用大同国家测震台2008年1月至2012年2月观测到的Ms≥5.0的地震事件,与中国地震台网中心正式地震目录中给出的震级,进行震级偏差统计分析,找出二者间的关系,并对产生偏差的原因进行分析。结果表明,大同台观测到远震的震级偏差均值为0.18,观测仪器和分析软件的不同、震中距、方位角、震级大小、震源深度对震级偏差均有一定的影响。更多还原

【Abstract】 Earthquakes with magnitudes(Ms)larger than 5.0recorded at Datong National Seismic Station from Jan.2008 to Feb.2012 are selected to make statistical analysis of their magnitude deviations with magnitudes determined by China Earthquake Networks Center in formal earthquake catalogue.Relations between the two are figured out and the reason for such deviation is analyzed.The results show that the mean value of magnitude deviation for distant earthquakes is 0.18,which depends on observation instrument and analysis software used,epicentral distance,azimuth,magnitude and focal depth.更多还原