地震地磁观测与研究Issue(1)：165-170,6.DOI:10.3969/j.issn.1003-3246.2014.01/02.031
陕西重力网优化改造及监测能力评估
摘要
Abstract
Originally,Shaanxi Gravity Monitoring Network only covered Guanzhong basin.We ex-tended it to southern margin of Ordos′s block,Guanzhong basin,Qinling mountainous area and the main active faults of southern Shaanxi and Guanzhong.Meanwhile,we carried out the monitoring work by combing the local gravity monitoring network of western Henan, southern Shanxi,and Ningxia.Therefore,the monitoring ability was improved from monito-ring magnitude 5 earthquakes occurred within the network area to monitoring magnitude 6 earthquakes occurred within the network area.We processed the observation data based on a constraint of 3 absolute gravity data.The results indicate that the mean square error of unit weight is 7. 7 ×10-8 m·s-2 ,and the average mean square error of observed points is 7. 9 × 10-8 m·s-2 .It can detect the relative gravity change of 40 ×10-8 m·s-2 within the network area,when the tolerance is set as 2. 5 times of mean square error.This monitoring ability provides a basis of studying gravity change in southern Ordos′s block.关键词
陕西重力网/区域重力场/重力基准/重力变化/监测能力Key words
Shaanxi Gravity Monitoring Network/local gravity field/gravity datum/gravity change/monitoring ability引用本文复制引用
曹建平,祝意青,韩美涛,李少睿..陕西重力网优化改造及监测能力评估[J].地震地磁观测与研究,2014,(1):165-170,6.基金项目
地震行业专项《中国综合地球物理场观测---鄂尔多斯地块周缘地区》基金项目（201208009），陕西省地震局中央财政地震灾后恢复重建基金项目 （）
