感应式磁力仪和磁通门磁力仪数据对比分析  

COMPARISON AND ANALYSIS OF DATA IN INDUCTIVE MAGNETOMETER AND FLUXGATE MAGNETOMETER

作　　者：张敏[1] 赵石柱[1] 雷晴 ZHANG Min,ZHAO Shi-zhu,LEI Qin(Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, Xinjiang, China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2018年第2期112-118,共7页Inland Earthquake

基　　金：新疆地震科学基金(201610)

摘　　要：采用经验模态分解方法(EMD)提取感应式磁力仪(SCM)北向分量(X)记录到的地磁脉动,分析其记录地磁脉动波形、主频与磁通门磁力仪(GM4)水平分量(H)记录地磁脉动的差异性,二者记录脉动波形基本相似,主频一致。GM4水平分量(H)数据一阶差分与SCM北向分量(X)1HZ数据相关分析为负相关,子午工程东经120°E子午链和30°N纬圈链地磁台站SCM数据提取地磁脉动,可以看到地磁脉动的振幅、谱幅度随着经纬度的减小而减小,主频在各个纬度几乎都在9 m Hz左右。For the research of the geomagnetic pulsation,we use the empirical mode decomposition（ EMD） to get the geomagnetic pulsation from inductive magnetometer and flux-gate magnetometer,and discuss the geomagnetic pulsation waveform and main frequency of the two instruments,the result shows no different in both waveform and the main frequency. Calculate correlation among them,the correlation coefficient is negative and very small. In the end we talk about the magnetic latitude effect along longitude 120 ° E and latitude 30 ° N,the amplitude of geomagnetic pulsation has obvious latitude effect,the main frequency is almost the same along different latitude,the amplitude of main frequency decreases with the reduce of the latitude,the conclusion of both instruments are nearly the same,the frequency is almost 9 m Hz in every latitude.

关 键 词：感应式磁力仪 子午链 地磁脉动 

分 类 号：P315.7[天文地球—地震学]