山东地区地电场观测资料分析研究
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摘要
介绍了山东地区7个地电场观测台的概况,选取各台2007～2011年的观测数据,从资料的完整性、内在质量(包括相关系数和归零差值)、数据变化及受干扰情况等几个方面进行了分析和探讨。结果表明:各台地电场观测资料保持了较好的连续性和完整性,数据能够满足分析预报使用的要求。从数据质量来看,郯城、菏泽、陵阳和大山台的数据较好,其相关系数大于0.95,更换电极后归零差值控制在1mV/km左右,可为地震预测研究提供可靠的数据资料。在数据变化形态方面,山东地区地电场变化形态多数属于潮汐型地电场,日常观测中,主要受到了地电暴、雷电及外线路故障等干扰。
Introducing the general situation of 7 geo-electric field observation stations in Shandong region,we selected the observation data recorded by 7 stations from 2007 to 2011 and analyzed the integrity,intrinsic quality(including correlation coefficient and zero difference),the shape of normal daily variation of the geo-electric observation data and the its situation of interferences.The results showed that the observation data kept the continuous and integrity and met the requirements of earthquake analysis and prediction.In the aspect of intrinsic quality,the quality of the geo-electric data recorded by Tancheng,Heze,Lingyang and Dashan stations was high,and the correlation coefficient of data was larger than 0.95,the return-to-zero difference was controlled less than 1 mV/km after replacing the electrode.It could provide reliable data for seismic research.And in the other aspect of daily variation shape,the shape of observation data in Shandong Region was tidal geo-electric field mostly.In daily observation,the data variation shape was mainly affected by various kinds of interferences such as geo-electrical storms,lightning and external line fault.
Introducing the general situation of 7 geo-electric field observation stations in Shandong region,we selected the observation data recorded by 7 stations from 2007 to 2011 and analyzed the integrity,intrinsic quality(including correlation coefficient and zero difference),the shape of normal daily variation of the geo-electric observation data and the its situation of interferences.The results showed that the observation data kept the continuous and integrity and met the requirements of earthquake analysis and prediction.In the aspect of intrinsic quality,the quality of the geo-electric data recorded by Tancheng,Heze,Lingyang and Dashan stations was high,and the correlation coefficient of data was larger than 0.95,the return-to-zero difference was controlled less than 1 mV/km after replacing the electrode.It could provide reliable data for seismic research.And in the other aspect of daily variation shape,the shape of observation data in Shandong Region was tidal geo-electric field mostly.In daily observation,the data variation shape was mainly affected by various kinds of interferences such as geo-electrical storms,lightning and external line fault.
引文
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刘运生,毛春长,等.1996.地球物理学简明教程[M].北京:地震出版社.
毛桐恩,席继楼,王燕琼,等.1999.地震过程中的大地电场变化特征[J].地球物理学报,42(4):519-528.
谭大诚,赵家骝,席继楼,等.2010.潮汐地电场特征及机理研究[J].地球物理学报,53(2):544-555.
汪忠德.2008.中国大陆自然电场的前兆机理与特征[J].地震学报,30(4):360-365.
席继楼,赵家骝,王燕琼,等.2002.地电场观测技术研究[J].地震,22(2):67-73.
叶青,杜学彬,周克昌,等.2007.大地电场变化的频谱特征[J].地震学报.29(4):382-390.
张继红,赵国泽,肖骑彬.2012.郯庐断裂带中段(沂沭断裂带)电性结构研究与孕震环境[J].地球物理学报,53(3):605-611.
张建国,张国勇,王晋萍.2003.场电特性与防雷工程[J].山西气象,52(3):47-63.
张学民,郭建芳,郭学增.2006.河北省数字地电场数据分析[J].中国地震,22(1):64-75.
赵洁,杜学彬,胡建军,等.2009.嘉峪关地电场观测资料分析[J].西北地震学报,31(3):290-295.
郑兆苾,汪雪泉.2005.蒙城台地电场资料分析[J].地震,25(2):41-47.
DB/T18.2—2006,地震台站建设规范[S].
GB/T19531—2004,地震台站观测环境技术要求[S].
Varotsos P,Alexopoulos K.1984.Physical properties of the variations ofthe electric field of the earth preceding earthquakes[J].I Tectophys-ics,110(1-2):73-98.
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