福建地区近震震级偏差研究  

Study on Local Magnitude Deviations in Fujian

作　　者：郭阳[1] 李军[1] 金星[1] 林彬华 蔡辉腾[1] GUO Yang;LI Jun;JIN Xing;LIN Binhua;CAI Huiteng(Fujian Earthquake Agency,7 Huahong Road,Fuzhou 350003,China)

机构地区：[1]福建省地震局,福州市350003

出　　处：《大地测量与地球动力学》2025年第3期266-272,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(42104062);福建省地震局科研基金(M202302)。

摘　　要：基于福建数字地震台网编目资料,选取2010—2023年发生在福建地区的3720次地震,研究福建地区近震震级M_(L)偏差,采用震级残差法获得适用于福建地区的量规函数R_(3)(Δ)、台站校正值S_(j)和介质传播方向校正值S_(θ),以提高近震震级精度。结果表明,校正后的震级偏差标准差从0.29降至0.19;为提高预警震级的准确性,应用首台震级测定,震级偏差标准差从0.31降至0.25。由此可见,新修订的量规函数、台站校正值和介质传播方向校正值在福建地区具有较强的适用性。Based on the catalogue data from Fujian digital seismic network,a total of 3720 earthquakes that occurred in Fujian from 2010 to 2023 are selected to study the local magnitude(M_(L))deviations.The magnitude residual method is used to obtain a new calibration function(R_(3)(Δ)),station correction values(S_(j))and medium propagation direction correction values(S_(θ))which are applicable to Fujian,enhancing the accuracy of local magnitude measurement.The results indicate that standard deviation of magnitude deviations decreases from 0.29 to 0.19 after correction.In order to improve the accuracy of earthquake warning magnitude measurement,we apply the first station’s magnitude,resulting in the standard deviation of magnitude deviations decreases from 0.31 to 0.25.It is evident that the new calibration function,station correction values and medium propagation direction correction values exhibit strong practicality in Fujian.

关 键 词：震级偏差 量规函数 台站校正值 介质传播方向校正值 震级残差法 

分 类 号：P315[天文地球—地震学]