应用趋势面分析法去除流磁观测成果中的区域性变化成分
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摘要
采用相关地磁总强度加密区观测资料,利用趋势面分析方法对监测区岩石圈磁场变化中的区域性成分进行研究和讨论。结果表明,利用趋势面分析方法可以有效确定和去除监测区岩石圈磁场的区域性变化成分,使局部异常成分的空间分布形态更加明确、合理,有助于我们对前兆异常进行识别。
The results of mobile geomagnetic data processing may contain significant trend components, which interfere with the identification of anomalous information, and their removal thus becomes necessary. In this paper, the trend surface analysis method was applied to determine and strip the trend components from mobile geomagnetic data processing results. The results showed that the trend surface analysis method could effectively determine and remove the regional variation components of the lithosphere magnetic field in the monitoring area, and make the spatial distribution of the local anomalous components clearer and more reasonable. This is helpful for the identification of precursory anomalies. The technological ideas adopted in this paper are innovative, and the process of technological treatment is relatively simple, operable, and clear in its physical significance.
The results of mobile geomagnetic data processing may contain significant trend components, which interfere with the identification of anomalous information, and their removal thus becomes necessary. In this paper, the trend surface analysis method was applied to determine and strip the trend components from mobile geomagnetic data processing results. The results showed that the trend surface analysis method could effectively determine and remove the regional variation components of the lithosphere magnetic field in the monitoring area, and make the spatial distribution of the local anomalous components clearer and more reasonable. This is helpful for the identification of precursory anomalies. The technological ideas adopted in this paper are innovative, and the process of technological treatment is relatively simple, operable, and clear in its physical significance.
引文
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(1)中国地震局监测司.关于印发《流动地磁测量基本技术要求(试行)》的通知(中震测函[2015]39号),2015.
[2]刘义高,胡诚,张明,等.流动地磁测量中地震异常信息的探索[J].西北地震学报,2004,26(4):353-356.LIU Yigao,HU Cheng,ZHANG Ming,et al.Exploration for Anomalous Information in Mobile Geomagnetic Survey[J].Northwestern Seismological Journal,2004,26(4):353-356.
[3]顾左文,张毅,姚同起,等.九江-瑞昌MS5.7地震地磁异常的观测与分析[J].地震学报,2006,28(6):611-621.GU Zuowen,ZHANG Yi,YAO Tongqi,et al.Observation and Analysis of Geomagnetic Abnormity Associated with the MS=5.7Jiujiang-Ruichang Earthquake[J].Acta Seismologica Sinica,2006,28(6):611-621.
[4]张毅,顾左文,顾春雷,等.《2005.0中国地磁图》在地震监测预报中的应用[J].地震地磁观测与研究,2007,28(3):1-7.ZHANG Yi,GU Zuowen,GU Chunlei,et al.The Application of“Map of the Geomagnetic in China 2005.0”in Earthquake Forecast[J].Seismological and Geomagnetic Observation and Research,2007,28(3):1-7.
[5]乔子云,张建国,焦成丽,等.冀豫环流动磁测异常与中等地震关系研究[J].地震地磁观测与研究,2009,30(4):1-6.QIAO Ziyun,ZHANG Jianguo,JIAO Chengli,et al.Relationship of the Mobile Geomagnetic Anomalies in Hebei and Henan Circulation with Medium Earthquake in Surrounding Area[J].Seismological and Geomagnetic Observation and Research,2009,30(4):1-6.
[6]陈斌.自然正交分量方法在地震地磁监测中的应用[J].地震研究,2011,34(4):466-469.CHEN Bin.Application of the Natural Orthogonal Components Method to the Seismic Geomagnetic Monitoring[J].Journal of Seismological Research,2011,34(4):466-469.
[7]倪喆,陈双贵,袁洁浩,等.芦山7.0级地震前后岩石圈磁场异常变化研究[J].地震研究,2014,37(1):61-65.NI Zhe,CHEN Shuanggui,YUAN Jiehao,et al.Research on A-nomalies Variation of Lithosphere Magnetic Field before and after Lushan MS7.0Earthquake[J].Journal of Seismological Research,2014,37(1):61-65.
[8]倪喆,袁洁浩,王粲,等.2014年云南鲁甸6.5级、永善5.0级地震前岩石圈磁场局部异常特征分析[J].地震研究,2014,37(4):537-541.NI Zhe,YUAN Jiehao,WANG Can,et al.Analysis of Local Anomalous Characteristics of Lithospheric Magnetic Field before Ludian M6.5and Yongshan M5.0Earthquakes in Yunnan in 2014[J].Journal of Seismological Research,2014,37(4):537-541.
[9]陈斌,顾左文,狄传芝,等.2009-2010年大华北岩石圈磁异常分布及其变化特征[J].云南大学学报(自然科学版),2011,33(5):548-553.CHEN Bin,GU Zuowen,DI Chuanzhi,et al.Distributions of the Lithospheric Magnetic Anomalies and Its Variations in North China from 2009to 2010[J].Journal of Yunnan University(Natural Sciences),2011,33(5):548-553.
[10]丁鉴海,卢振业,黄雪香.地震地磁学[M].北京:地震出版社,1994.DING Jianhai,LU Zhenye,HUANG Xuexiang.Seismogeomagnetism[M].Beijing:Seismological Press,1994.
(1)中国地震局监测司.关于印发《流动地磁测量基本技术要求(试行)》的通知(中震测函[2015]39号),2015.