河北文安5.1级地震前的重力变化
|
摘要
对2006年7月4日河北文安5.1级地震孕育过程中首都圈重力场的异常变化和动态演化特征的研究结果表明:震前出现的重力上升—下降—上升变化是较明显的中短期异常反映;重力场动态图像较清晰地反映了研究区重力场的准均匀态—非均匀态—发震的演化过程;文安5.1级地震与2004年1月河北滦县5.0级地震的重力场变化具有相似特征。
The anomalous variation and dynamic evolution characteristics of the gravity field in the Capitol region in the seismogenic process of the Wenan Ms5.1 earthquake on July 4,2006 are studied.The results show that the up-down-up variations of gravity before earthquake are the obvious reflection of medium-shout-term anomaly.The dynamic patterns of gravity field reflect clearly the evolutionary process of the gravity field: quasi-homogeneous state-non-homogeneous state-earthquake occurrence.There is similar evolution characteristics of the gravity field between Wenan Ms 5.1 earthquake and of Luanxian ML5.0 earthquake on January 20,2004.
The anomalous variation and dynamic evolution characteristics of the gravity field in the Capitol region in the seismogenic process of the Wenan Ms5.1 earthquake on July 4,2006 are studied.The results show that the up-down-up variations of gravity before earthquake are the obvious reflection of medium-shout-term anomaly.The dynamic patterns of gravity field reflect clearly the evolutionary process of the gravity field: quasi-homogeneous state-non-homogeneous state-earthquake occurrence.There is similar evolution characteristics of the gravity field between Wenan Ms 5.1 earthquake and of Luanxian ML5.0 earthquake on January 20,2004.
引文
1李辉,等.滇西地区重力场动态变化计算[J].地壳形变与地震,2000,20(1):60-66. Li hui,et al.Computation on dynamic gravity changes in thewestern area of Yunnan province[J].Crustal Deformationand Earthquake,2000,20(1):60-66.(in Chinese)
2贾民育,等.香山绝对点的重力非潮汐变化[J].地壳形变与地震,2001,21(4):52-57.2 Jia Minyu,et al.Non-tidal gravity variation at Xiangshan ab-solute station[J].Crustal Deformation and Earthquake,2001,21(4):52-57.(in Chinese)
3江在森,等.中国西部大地形变监测与地震预测[M].北京:地震出版社,2001.Jiang Zaisen,et al.The geodetic deformation surveillanceand earthquake prediction in western region of China[M].Beijing:Seismological Press,2001.(in Chinese)
4刘善华,等.滦县ML5.0地震前重力异常探讨[J].大地测量与地球动力学,2005,25(1):30-34. Liu Shanhua,et al.Research on gravity anomaly before Lu-anxianML5.0 earthquake[J].Journal of Geodesy and Geo-dynamics.2005,25(1):30-34.(in Chinese)
5孙少安,等.滇西和北京区域重力场演化及其与地震关系的探讨[J].地震,1999,19(1):97-106. Sun Shaoan,et al.Research on evolution of western Yunnanand Beijing regional gravity fields and their relationship withearthquake[J].Earthquake.1999,19(1):97-106.(inChinese)
6郑金涵,等.利用重力资料反演京津唐张地区震震中[J].地震学报,2003,25(4):422-431. Zheng Jinhan,et al.Earthquake epicentroids in Beijing-Tianjin-Tangshan-Zhangjiakou region inversed by gravityvarition data[J].Acta Seismologica Sinica,2003,25(4):422-431.(in Chinese)
7马丽,李志雄.几次地震前的重力异常探讨[A].地震预报方法实用化研究文集———形变.重力.应变专集[C].北京:地震出版社,1991. Ma Li and Li Zhixiong.Approach on gravity anomaly beforesome earthquakes[A].Collection of articles on the methodof earthquake forecast in practical———symposium of deform-ation,gravity,strain[C].Beijing:Seismological Press,1991.(in Chinese)
8刘善华,等.华北地区强震前地壳垂直形变和重力异常[J].大地测量与地球动力学,2002,22(3):34-39. Liu Shanhua,et al.Resemblant character of vertical deform-ation and gravity anomalies before macroseism in North Chi-na[J].Journal of Geodesy and Geodynamics,2002,22(3):34-39.(in Chinese)
2贾民育,等.香山绝对点的重力非潮汐变化[J].地壳形变与地震,2001,21(4):52-57.2 Jia Minyu,et al.Non-tidal gravity variation at Xiangshan ab-solute station[J].Crustal Deformation and Earthquake,2001,21(4):52-57.(in Chinese)
3江在森,等.中国西部大地形变监测与地震预测[M].北京:地震出版社,2001.Jiang Zaisen,et al.The geodetic deformation surveillanceand earthquake prediction in western region of China[M].Beijing:Seismological Press,2001.(in Chinese)
4刘善华,等.滦县ML5.0地震前重力异常探讨[J].大地测量与地球动力学,2005,25(1):30-34. Liu Shanhua,et al.Research on gravity anomaly before Lu-anxianML5.0 earthquake[J].Journal of Geodesy and Geo-dynamics.2005,25(1):30-34.(in Chinese)
5孙少安,等.滇西和北京区域重力场演化及其与地震关系的探讨[J].地震,1999,19(1):97-106. Sun Shaoan,et al.Research on evolution of western Yunnanand Beijing regional gravity fields and their relationship withearthquake[J].Earthquake.1999,19(1):97-106.(inChinese)
6郑金涵,等.利用重力资料反演京津唐张地区震震中[J].地震学报,2003,25(4):422-431. Zheng Jinhan,et al.Earthquake epicentroids in Beijing-Tianjin-Tangshan-Zhangjiakou region inversed by gravityvarition data[J].Acta Seismologica Sinica,2003,25(4):422-431.(in Chinese)
7马丽,李志雄.几次地震前的重力异常探讨[A].地震预报方法实用化研究文集———形变.重力.应变专集[C].北京:地震出版社,1991. Ma Li and Li Zhixiong.Approach on gravity anomaly beforesome earthquakes[A].Collection of articles on the methodof earthquake forecast in practical———symposium of deform-ation,gravity,strain[C].Beijing:Seismological Press,1991.(in Chinese)
8刘善华,等.华北地区强震前地壳垂直形变和重力异常[J].大地测量与地球动力学,2002,22(3):34-39. Liu Shanhua,et al.Resemblant character of vertical deform-ation and gravity anomalies before macroseism in North Chi-na[J].Journal of Geodesy and Geodynamics,2002,22(3):34-39.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心