2005-2010年中国地磁测量与地磁场模型的应用  

Application of Chinese geomagnetic survey and geomagnetic model for 2005-2010

作　　者：徐如刚[1] 顾左文[2] 黎哲君[1] 谈昕[1] 张毅[1] 王雷[1] 袁洁浩[2] 翟洪涛[1] 辛长江 苏树鹏[4] 

机构地区：[1]安徽省地震局,合肥230031 [2]中国地震局地球物理研究所,北京100081 [3]甘肃省地震局,兰州730000 [4]河北省地震局,石家庄050021

出　　处：《地球物理学进展》2014年第5期2092-2099,共8页Progress in Geophysics

基　　金：2011年度国家科技计划项目"远东地区地磁场;重力场及深部构造观测与模型研究"(2011DFB20210);2013年度地震行业专项经费项目"中国地震科学台阵探测-南北地震带北段"(201308011);安徽省地震科研青年项目(20130701)联合资助

摘　　要：自2002年起,为编绘中国地磁图,在我国开展了地磁三分量绝对测量(观测要素为:地磁偏角D、地磁倾角I和地磁总强度F)、地磁场模型计算与研究工作,完成了《2005.0中国地磁图》和《2010.0中国地磁图》.同时以中国地磁图为依托,在我国南北地震带、华北地区建立了地震地磁监测区,并将地磁三分量绝对测量模式拓展应用于监测区的地震监测与地震前兆研究之中.本文详细地介绍了中国地磁图的测量模式、地磁场模型计算、地磁图的编绘以及在地震地磁监测区开展的震磁变化时、空、强的探索研究成果.地震地磁监测区的地震实例研究表明:震磁前兆信息不仅在地磁总强度F有显示,而且在地磁场其他要素也有显示,如磁偏角D、地磁场水平分量H;地磁三分量测量模式克服了传统地磁总强度监测模式的局限性,有助于增大信息量,拓展研究空间,提升流动地磁监测能力,对未来强震的中长期预测,尤其是在发震地点的判定上具有优势,是一种有效的、值得探索研究的地震监测预报方法.In order to compile geomagnetic map of China,geomagnetic three component survey（including the geomagnetic declination D,the inclination I and the total intensity F）and the research of geomagnetic model calculation have been carried out in China since 2002.At the same time,geomagnetic map of China for 2005.0 and 2010.0 were finished respectively.Relying on geomagnetic map of China for 2005.0 and 2010.0,seismological and geomagnetic surveillance zones were established in North-South seismic belt and North China,and the new model of geomagnetic three component survey is used in research of earthquake precursor and monitoring.In this paper,the survey model of geomagnetic map,the method of model calculation,compilation geomagnetic map of China and seismo-magnetic research results in seismological and geomagnetic surveillance zone are introduced in detail.Basing on the research results of recent earthquake cases in seismological and geomagnetic surveillance zone, some conclusions have been drawn as follows：the information of seismo-magnetic precursor is reflected by not only the total intensity F but also other geomagnetic elements,such as the geomagnetic declination D and horizontal component H.The model of geomagnetic three component survey, which overcomes the limitations of traditional total intensity monitoring model,helps to increase the amount of information,expand research space and enhance the capabilities of geomagnetic monitoring.Meanwhile,this model has unique advantages in the medium and long term earthquake prediction,especially for forecasting localities of potential of earthquakes.The mode is also an effective method of earthquake monitoring and prediction,which is well worth exploring.

关 键 词：地磁三分量 地磁场模型 中国地磁图 地震监测 地震预报 

分 类 号：P318[天文地球—固体地球物理学]