SUN JunSong,
DU XueBin,
WANG Li et al
.2018.Study on the Geoelectric Index (GEI) Chinese Journal of Geophysics(in Chinese),61(11): 4493-4503,doi: 10.6038/cjg2018L0485
SUN JunSong1,2, DU XueBin1,2, WANG Li3, CUI TengFa4
1. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China; 2. Lanzhou National Observatory of Geophysics, Lanzhou 730000, China; 3. Nanjing Seismic Station of Earthquake Administration of Jiangsu Province, Nanjing 210014, China; 4. Institute of Geology, China Earthquake Administration, Beijing 100029, China
Abstract:The geoelectric index (GEI) is proposed using the observation data of geoelectric field observed at 11 stations in the mainland China in magnetically quiet and disturbed days from 1/1/2012 to 5/31/2017 (about 5.5 years), by closely linking the facts of the sensitive response of geoelectric field variation to the inhomogeneity in the underground medium and the space electromagnetic activity on the basis of the amplitude ratio of geoelectric field after removing off the magnetically quiet variation. As compared with the geomagnetic index at each station, it can be seen that for the single indices of each station, the geoelectric indices D are in keeping with the geomagnetic indices K in the proportion of 87.43%; and that for the average index of the 11 stations, the geoelectric indices Ds are in coincidence with the geomagnetic indices [K+0.5] (viz. round-up) in the proportion of 93.75%. The keeping means that the geoelectric indices are numerically the same as the geomagnetic indices or that the numerical difference is just one between the geoelectric and geomagnetic indices, for same a level of index concerned. These show that the geoelectric index, GEI, defined in this paper can be used to quantify the level of geoelectric disturbance, just like quantifying the level of geomagnetic disturbance using a geomagnetic field index. It is evident that the geoelectric index is another criterion to quantify the earth's electromagnetic disturbance level, in addition to the geomagnetic index. The geoelectric index can be applied to many fields, such as the monitoring and scientific research for the earth's electromagnetic environment variation and related disaster events; furthermore, it can also be used to evaluate the quality of the observation data of the geoelectric field station.
Краев А П. 1954. Geoelectrics Principle (in Chinese). Compiling Room of the Ministry of Geology of the Central People's Government, Trans. Beijing:Geological Publishing House. An Z C, Xu Y F, Wang Y H. 1991. Derivation and analysis of the main geomagnetic field models in China for 1950-1980. Acta Geophysica Sinica (in Chinese), 34(5):585-593. Bartels J, Heck N H, Johnston H F. 1939. The three-hour-range index measuring geomagnetic activity. Terrestrial Magnetism and Atmospheric Electricity, 44(4):411-454. China Earthquake Administration. 2008. DB/T 30.2-2008 Technical requirements of instruments in network for earthquake monitoring Geomagnetic meter Part2:Proton vector magnetometer (in Chinese). Beijing:China Standard Press. Cui T F, Du X B, Ye Q, et al. 2013. The diurnal variation of geo-electric field along the longitude and latitude chains in China mainland. Chinese Journal of Geophysics (in Chinese) 56(4):2358-2368, doi:10.6038/cjg20130722. Dessler A J, Fejer J A. 1963. Interpretation of Kp index and M-region geomagnetic storms. Planetary and Space Science, 11(5):505-511. Du X B, Xi J L, Tan D C, et al. 2006. DB/T 18.2-2006 Specification for the construction of seismic station geoelectrical station Part 2:Geoelectrical field observatory (in Chinese). Beijing:China Earthquake Administration. Fan YY, Du X B, Zlotnicki J, et al. 2010. The electromagnetic phenomena before the MS8.0 Wenchuan Earthquake. Chinese Journal of Geophysics (in Chinese) 53(6):2887-2898, doi:10.3969/j.issn.0001-5733.2010.12.012. Huang Q H, Liu T. 2006. Earthquakes and tide response of geoelectric potential field at the Niijima station. Chinese Journal of Geophysics (in Chinese), 49(6):1745-1754. Huang Q H, Lin Y F. 2010. Numerical simulation of selectivity of seismic electric signal and its possible influences. Chinese Journal of Geophysics (in Chinese), 53(3):535-543, doi:10.3969/j.issn.0001-5733.2010.03.007. Li F, Du X B, Dong M. 2017. Diurnal variation of geoelectric field and its tidal response for the stations Xinyi and Malingshan. Acta Seismologica Sinica (in Chinese), 39(4):565-578. Li J M. 2005. Geoelectric Field and Electrical Exploration (in Chinese). Beijing:Geological Publishing House. Liu J, Du X B, Zlotnicki J, et al. 2011. The changes of the ground and ionosphere electric/magnetic fields before several great earthquakes. Chinese Journal of Geophysics (in Chinese), 54(11):2885-2897,doi:10.3969/j.issn.0001-5733.2011.11.018. Liu L G, Wu W L. 2014. Review of the influential factors of the power system disaster risk due to geomagnetic storm. Chinese Journal of Geophysics (in Chinese), 57(6):1709-1719, doi:10.6038/cjg20140603. Ma Q Z, Li W, Zhang J H, et al. 2014. Study on the spatial variation characteristics of the geoelectric field signals recorded at the stations in the east Huabei area when a great current is injected. Chinese Journal of Geophysics (in Chinese), 57(2):518-530. Menvielle M, Papitashvili N, Häkkinen L, et al. 1995. Computer production of K indices:Review and comparison of methods. Geophysical Journal International, 123(3):866-886. Orihara Y, Kamogawa M, Nagao T, et al. 2012. Preseismic anomalous telluric current signals observed in Kozu-shima Island, Japan. Proceedings of the National Academy of Sciences of the United States of America, 109(47):19125-19128. Sucksdorff C, Pirjola R, Häkkinen L. 1991. Computer production of K-values based on linear elimination. Geophysical Transactions, 36:333-345. Sun J S, Du X B. 2017. The time-frequency characteristics of geoelectric storm in Chinese mainland. Acta Seismologica Sinica (in Chinese), 39(4):615-632. Sun Z J, Wang H J. 1990. Introduction of Geoelectricity (in Chinese). Beijing:Earthquake Press. Tan D C, Zhao J L, Liu X F, et al. 2014. Features of regional variations of the spontaneous field. Chinese Journal of Geophysics (in Chinese), 57(3):1588-1598, doi:10.6038/cjg20140522. Tschu K K. 2001. Studies on the disturbance variations of geomagnetic field at So-Sè, near Shanghai, China. Chinese Journal of Geophysics (in Chinese), 44(S1):51-67. Varotsos P, Alexopoulos K. 1984a. Physical properties of the variations of the electric field of the earth preceding earthquakes, I. Tectonophysics, 110(1-2):73-98. Varotsos P, Alexopoulos K. 1984b. Physical properties of the variations of the electric field of the earth preceding earthquakes. Ⅱ. Determination of epicenter and magnitude. Tectonophysics, 110(1-2):99-125. Wang JJ, Li Q, Yang D M, et al. 2017. An improved FMI method of deriving K indices. Chinese Journal of Geophysics (in Chinese), 60(7):2534-2544, doi:10.6038/cjg20170703. Wang L, Du X B, Wu Z, et al. 2015. Daily variation model of the geo-electric field based on the geo-electric data from the regional geo-electric observation networks. Acta Seismologica Sinica (in Chinese), 37(5):830-841. Wei Q, Yan R, Han X H, et al. 2017. Inversion for artificial electricity-leaking in geo-electric field observations based on Newton iteration and its application. Progress in Geophysics (in Chinese), 32(4):1490-1495, doi:10.6038/pg20170410. Xi J L, Zhao J L, Liu C, et al. 2016. Research and application of the new type networked geo-electric field observation technology. Progress in Geophysics (in Chinese), 31(6):2690-2699, doi:10.6038/pg20160645. Xu W Y. 2003. Geomagnetism (in Chinese). Beijing:Seismological Press. Ye Q. 2006. Research on the basic features of the geoelectric field variation and the physical explanation[Master's thesis] (in Chinese). Lanzhou:Lanzhou institute of Seismology, CEA. Ye Q, Du X B, Zhou K C, et al. 2007. Spectrum characteristics of geoelectric field variation. Acta Seismologica Sinica, 20(4):382-390. Zheng K, Liu L G, Boteler D H, et al. 2013. Modelling geomagnetically induced currents in multiple voltage levels of a power system illustrated using the GIC-Benchmark case. Proceedings of the CSEE (in Chinese), 33(16):179-186. Zhang X, Du X B, Wang L, et al. 2017a. The spatial distribution of telluric currents and its relationship with earthquake activities in North-South seismic belt. Earth Science Frontiers (in Chinese), 24(2):202-211. Zhang X, Du X B, Liu J. 2017b. The responses analysis of GIC and vortex current in Huabei region during geoelectric storms. Chinese Journal of Geophysics (in Chinese), 60(5):1800-1810,doi:10.6038/cjg20170516. Zhang X, Liu J, Du X B. 2017. A model of the telluric current eddy:A case from eastern China. Journal of Geophysics and Engineering, 2017, 14(3):478-486. 安振昌, 徐元芳, 王月华. 1991. 1950-1980年中国地区主磁场模型的建立及分析. 地球物理学报, 34(5):585-593. 崔腾发, 杜学彬, 叶青等. 2013. 中国大陆经纬链地电场日变化. 地球物理学报, 56(7):2358-2368, doi:10.6038/cjg20130722. 杜学彬, 席继楼, 谭大诚等. 2006. DB/T 18.2-2006 地震台站建设规范 地电观测台站 第2部分:地电场台站. 北京:中国地震局. 范莹莹, 杜学彬, Zlotnicki J等. 2010. 汶川MS8.0大震前的电磁现象. 地球物理学报, 53(12):2887-2898, doi:10.3969/j.issn.0001-5733.2010.12.012. 傅承义, 陈运泰, 祁贵仲. 1985. 地球物理学基础. 北京:科学出版社. 黄清华, 刘涛. 2006. 新岛台地电场的潮汐响应与地震. 地球物理学报, 49(6):1745-1754. 黄清华, 林玉峰. 2010. 地震电信号选择性数值模拟及可能影响因素. 地球物理学报, 53(3):535-543, doi:10.3969/j.issn.0001-5733.2010.03.007. 克拉耶夫. 地电原理. 1954. 中央人民政府地质部编译室, 译.北京:地质出版社. 李飞, 杜学彬, 董淼. 2017. 新沂台和马陵山台地电场日变化及潮汐响应初步分析. 地震学报, 39(4):565-578. 李金铭. 2005. 地电场与电法勘探. 北京:地质出版社. 刘君, 杜学彬, ZlotnickiJ等. 2011. 几次大震前的地面和空间电磁场变化. 地球物理学报, 54(11):2885-2897, doi:10.3969/j.issn.0001-5733.2011.11.018. 刘连光, 吴伟丽. 2014. 电网磁暴灾害风险影响因素研究综述. 地球物理学报, 57(6):1709-1719, doi:10.6038/cjg20140603. 马钦忠, 李伟, 张继红等. 2014. 与大电流信号有关的华北东部地区地电场空间变化特征的研究. 地球物理学报, 57(2):518-530. 孙君嵩, 杜学彬. 2017. 中国大陆地电暴时频特征. 地震学报, 39(4):615-632. 孙正江, 王华俊. 1990. 地电概论. 北京:地震出版社. 谭大诚, 赵家骝, 刘小凤等. 2014. 自然电场的区域性变化特征. 地球物理学报, 57(5):1588-1598, doi:10.6038/cjg20140522. 王建军, 李琪, 杨冬梅等. 2017. 地磁活动K指数自动计算FMI方法的改进. 地球物理学报, 60(7):2534-2544, doi:10.6038/cjg20170703. 王丽, 杜学彬, 武震等. 2015. 区域地电观测网地电场日变化模型研究. 地震学报, 37(5):830-841. 卫清, 颜蕊, 韩秀红等. 2017. 基于牛顿迭代法的地电场观测人为漏电干扰源反演及其应用. 地球物理学进展, 32(4):1490-1495, doi:10.6038/pg20170410. 席继楼, 赵家骝, 刘超等. 2016. 新型网络化地电场观测技术研究与应用. 地球物理学进展, 31(06):2690-2699, doi:10.6038/pg20160645. 徐文耀. 地磁学. 2003. 北京:地震出版社. 叶青. 2006. 地电场变化的基本要素研究及物理解释[硕士论文]. 兰州:中国地震局兰州地震研究所. 叶青, 杜学彬, 周克昌等. 2007. 大地电场变化的频谱特征. 地震学报, 29(4):382-390. 章鑫, 杜学彬, 王丽等. 2017a. 南北地震带大地电流分布与地震活动关系探讨. 地学前缘, 24(2):202-211. 章鑫, 杜学彬, 刘君. 2017b. 华北地区地电暴时GIC及涡旋电流响应分析. 地球物理学报, 60(5):1800-1810, doi:10.6038/cjg20170516. 郑宽, 刘连光, Boteler D H等. 2013. 多电压等级电网的GIC-Benchmark建模方法. 中国电机工程学报, 33(16):179-186. 中国地震局. 2008. DB/T 30.2-2008 地震观测仪器进网技术要求地磁观测仪 第2部分:质子矢量磁力仪. 北京:中国标准出版社. 朱岗崑. 2001. 关于佘山地磁场扰动变化的分析. 地球物理学报, 44(S1):51-67.