数字与模拟观测系统测定地方震震级偏差研究

The magnitude deviation study of local earthquake between digital and analogue observation in Foziling Seismic Station

选用佛子岭地震台2008年9月至2009年8月记录的607个地方震事件,利用数字与模拟观测系统,对同一地震事件数字与模拟记录震级进行统计,做回归分析,计算两者偏差值,从震级偏差频次分布、震级偏差与震中距关系出发,比较差异性。结果表明,数字记录震级与模拟记录震级线性相关显著,经过拟合公式校正,固定常数校正和震中距校正,数字记录震级与模拟记录震级一致性较好。

Selecting the total 607 local earthquake events recorded by Foziling Sesimic Station in Sep. 2008 Aug. 2009, the magnitude measured by digital and analog observation systems for the same earthquake are statistically analyzed. After we do regression analysis, calculate The magnitude deviation is calculated with regression analysis. The difference of magnitude deviation between the digital and analog magnitude is compared from the frequency distribution of magnitude and the epicenter distance correlation. The results show that the linear correlation of digital and analog magnitude is significant. After fitting formula correction, a fixed constant correction and epicenter distance correction, the magnitude measured by digital and analog observation systems are able to achieve better consistency.