海拉尔地震台重力数据分析  

Analysis of gravity observation data at Hailar Seismic Station

作　　者：申影 王怡 堵伟鹏 SHEN Ying;WANG Yi;DU Weipeng(Hailar Seismic Station,Earthquake Agency of Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region 021000,China)

机构地区：[1]内蒙古自治区海拉尔地震台,内蒙古自治区021000

出　　处：《地震地磁观测与研究》2022年第6期88-93,共6页Seismological and Geomagnetic Observation and Research

基　　金：内蒙古自治区地震局局长基金课题(项目编号:2020JC21)。

摘　　要：选取海拉尔地震台2016—2020年PET重力观测数据,进行Nakai拟合检验和维尼迪可夫(Venedikov)调和分析,发现Q_(1)波、O_(1)波、P1S_(1)K_(1)波、M_(2)波、S_(2)K_(2)波重力潮汐因子和相位滞后存在大幅度异常,在潮汐因子及相位滞后异常时段及异常后一段时间内,国内均有6.0级及以上地震发生。通过对重力数据的非潮汐变化部分进行分析,发现重力数据受到温度和气压季节性变化带来的周期性干扰、仪器零漂和地壳变化等的影响。The PET gravity observation data of Hailar Seismic Station from 2016 to 2020 are selected for Nakai fitting test and Venedikov harmonic analysis.It is found that the gravity tide factor and phase lag of the Q_(1) wave,O_(1) wave,P_(1)S_(1)K_(1) wave,M_(2 )wave and S_(2)K_(2 )wave have significant anomalies.During and after the anomalous period,earthquakes of magnitude 6 and above occurred in China.The analysis of the non-tidal variation shows that the gravity data are influenced by periodic interference of seasonal temperature and pressure variations,instrument zero drift and crustal variations.

关 键 词：重力 固体潮 潮汐参数 非潮汐变化 

分 类 号：P315.78[天文地球—地震学]