大华北地震动态重力监测网分形特征研究
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摘要
从分形几何学角度研究优化后的大华北地震动态重力监测网的分形特征,给出优化后监测网的分维数D1=1.612、最佳化网格间距r=44 km。对优化后大华北地震动态重力监测网的监测能力的分析结果表明:测网的最佳化网格间距与Ms5.0地震诱发的重力场变化区域的特征异常区半径基本相当;测网对Ms5.0以上地震具有较好的监测能力。
The fractal characteristics of earthquake dynamic gravity network in Northern China is researched and its fractal dimension D1=1.612 and the optimum gridding interval r=44 km are calculated respectively.From the perspective of fractal geometry,the ability of monitoring of Seismological Dynamic Gravity Network in North China is analyzed.The results show that the optimum interval approximates to the anomaly radius of gravity field change region,which is induced by earthquake of Ms=5.0;Gravity Network has good ability to monitor and predict the earthquake of Ms>5.0.
The fractal characteristics of earthquake dynamic gravity network in Northern China is researched and its fractal dimension D1=1.612 and the optimum gridding interval r=44 km are calculated respectively.From the perspective of fractal geometry,the ability of monitoring of Seismological Dynamic Gravity Network in North China is analyzed.The results show that the optimum interval approximates to the anomaly radius of gravity field change region,which is induced by earthquake of Ms=5.0;Gravity Network has good ability to monitor and predict the earthquake of Ms>5.0.
引文
1陈运泰,等.1975年海城地震与1976年唐山地震前后的重力变化[J].地震学报,1980,2(1):21-31.(ChenYuntai,et al.Variations of gravity before and after the Hai-cheng earthquake,1975 and the Tangshan earthquake,1976[J].Acta Seimologica Sinica,1980,2(1):21-31)
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4李瑞浩,等.唐山地震前后区域重力场变化机制[J].地震学报,1997,19(4):399-407.(Li Ruohao,et al.Localgravity variations before and after the Tangshan earthquakeand dilatation process[J].Acta Seimologica Sinica,1997,19(4):399-407)
5 Shen Chongyang,Li Hui and Fu Guangyu.Study on gravityprecursor mode of theMs=7.0 Lijiang earthquake[J].ActaSeismological Sinica,2003,16(2):175-184.
6李辉,等.中国大陆近期重力场动态变化图像[J].大地测量与地球动力学,2009,(3):1-10.(Li Hui,et al.Dy-namic gravity change in recent years in China continent[J].Journal of Geodesy and Geodynamic,2009,(3):1-10)
7刘冬至,等.FG/232绝对重力仪的试验观测结果[J].大地测量与地球动力学,2007,(2):114-118.(Liu Dong-zhi,et al.Experimental observation results with FG5/232absolute gravimeter[J].Journal of Geodesy and Geodynam-ic,2007,(2):114-118)
8项爱民,孙少安,李辉.流动重力运行状态及质量评价[J].大地测量与地球动力学,2007,(6):109-114.(Xiang Aimin,Sun Shaoan and Li Hui.Running state andquality evaluation of repeated gravimetery[J].Journal of Ge-odesy and Geodynamic,2009,(6):109-114)
10贾民育.滇西动态重力网的分形特征及空间分辨率[J].地壳形变与地震,1996,(4):26-30.(Jia Minyu.Fractalcharacterization and spatial resolution of dynamic gravitynetwork in western Yunnan[J].Crustal Deformation andEearthquake,1996,(4):26-30)
11 Korvin G,et al.Fractal characterization of the South Aus-tralian gravity station[J].Geophs.J.Int,1990,100:535-539.
12徐如刚,等.郯庐断裂带重力网分形特征研究[J].大地测量与地球动力学,2007,(3):64-67.(Xu Rugang,etal.Fractal characterization of Tanlu gravity station network[J].Journal of Geodesy and Geodynamic,2007,(3):64-67)
13胡毓钜,等.地图投影[M].北京:测绘出版社,1981.(Hu Yuju,et al.Map projection[M].Beijing:Surveyingand Mapping Press,1981)
14孔祥元,等.大地测量学基础[M].武汉:武汉大学出版社,2001.(Kong Xiangyuan,et al.Basis of geodesy[M].Wuhan:Wuhan University Press,2001)
15贾民育,詹洁辉.中国地震重力监测体系的结构与能力[J].地震学报,2000,22(4):360-367.(Jia Minyu andZhan Jiehui.The structure and ability of the China seismo-logical gravity monitoring system[J].Acta SeismologicalSinica,2000,22(4):360-367)
①《中国大陆及地震重力网监测区重力变化研究项目建议》
2 Li R H.Local gravity variations before and after the Tangs-han earthquake(M=7.8)and dilatation process[J].Tec-tonophysics,1983,97:159-l69.
3贾民育,等.滇西重力变化的二维图象及其与5级(Ms)以上地震的关系[J].地壳形变与地震,1995,(3):9-19.(Jia Mingyu,et al.Two dimension pictures of gravity changein western Yunnan and their relations to the earthquakeMs5.0[J].Crustal Deformation and Earthquake,1995,(3):9-19)
4李瑞浩,等.唐山地震前后区域重力场变化机制[J].地震学报,1997,19(4):399-407.(Li Ruohao,et al.Localgravity variations before and after the Tangshan earthquakeand dilatation process[J].Acta Seimologica Sinica,1997,19(4):399-407)
5 Shen Chongyang,Li Hui and Fu Guangyu.Study on gravityprecursor mode of theMs=7.0 Lijiang earthquake[J].ActaSeismological Sinica,2003,16(2):175-184.
6李辉,等.中国大陆近期重力场动态变化图像[J].大地测量与地球动力学,2009,(3):1-10.(Li Hui,et al.Dy-namic gravity change in recent years in China continent[J].Journal of Geodesy and Geodynamic,2009,(3):1-10)
7刘冬至,等.FG/232绝对重力仪的试验观测结果[J].大地测量与地球动力学,2007,(2):114-118.(Liu Dong-zhi,et al.Experimental observation results with FG5/232absolute gravimeter[J].Journal of Geodesy and Geodynam-ic,2007,(2):114-118)
8项爱民,孙少安,李辉.流动重力运行状态及质量评价[J].大地测量与地球动力学,2007,(6):109-114.(Xiang Aimin,Sun Shaoan and Li Hui.Running state andquality evaluation of repeated gravimetery[J].Journal of Ge-odesy and Geodynamic,2009,(6):109-114)
10贾民育.滇西动态重力网的分形特征及空间分辨率[J].地壳形变与地震,1996,(4):26-30.(Jia Minyu.Fractalcharacterization and spatial resolution of dynamic gravitynetwork in western Yunnan[J].Crustal Deformation andEearthquake,1996,(4):26-30)
11 Korvin G,et al.Fractal characterization of the South Aus-tralian gravity station[J].Geophs.J.Int,1990,100:535-539.
12徐如刚,等.郯庐断裂带重力网分形特征研究[J].大地测量与地球动力学,2007,(3):64-67.(Xu Rugang,etal.Fractal characterization of Tanlu gravity station network[J].Journal of Geodesy and Geodynamic,2007,(3):64-67)
13胡毓钜,等.地图投影[M].北京:测绘出版社,1981.(Hu Yuju,et al.Map projection[M].Beijing:Surveyingand Mapping Press,1981)
14孔祥元,等.大地测量学基础[M].武汉:武汉大学出版社,2001.(Kong Xiangyuan,et al.Basis of geodesy[M].Wuhan:Wuhan University Press,2001)
15贾民育,詹洁辉.中国地震重力监测体系的结构与能力[J].地震学报,2000,22(4):360-367.(Jia Minyu andZhan Jiehui.The structure and ability of the China seismo-logical gravity monitoring system[J].Acta SeismologicalSinica,2000,22(4):360-367)
①《中国大陆及地震重力网监测区重力变化研究项目建议》
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