河北文安地震前后首都圈跨断层位移的变化特征
|
摘要
根据2006年7月4日河北文安5.1级地震前后首都圈跨断层位移的变化特征,结合该区1970年以来区域断层及区域地震活动特征分析认为:1)2000年以来首都圈NNE向断层逆冲活动增强,显示首都圈现今区域主压应力为NEE方向;2)首都圈及周边地区可能将进入下一个中强地震的活跃时段,河北文安地震是进入这一时段的标志;3)首都圈及周边地区NE向断层垂直活动起伏变化较大,其起伏变化幅度可作为中、长期地震的预测指标。
By analyzing the characteristics of fault-crossing displacement variation in the Capital area before and after the Ms 5.1 Wenan earthquake of Hebei on July 4,2006,and combining the characteristics of regional fault activities and regional seismicity in the area since 1970,it is concluded: 1) Since 2000 the thrust activities of NNE directional faults in the Capital area have been increasing,it shows that the present principal compressive stress in the Capital area is in NEE direction;2)The Capital area and surrounding regions may enter the next active period of medium-strong earthquakes;the Wenan earthquake marks the beginning of this period;3)The vertical activities of NE directional faults in the Capital area and surrounding areas change strongly,the amplitude of variation may be taken as an index for medium long-term earthquake prediction.
By analyzing the characteristics of fault-crossing displacement variation in the Capital area before and after the Ms 5.1 Wenan earthquake of Hebei on July 4,2006,and combining the characteristics of regional fault activities and regional seismicity in the area since 1970,it is concluded: 1) Since 2000 the thrust activities of NNE directional faults in the Capital area have been increasing,it shows that the present principal compressive stress in the Capital area is in NEE direction;2)The Capital area and surrounding regions may enter the next active period of medium-strong earthquakes;the Wenan earthquake marks the beginning of this period;3)The vertical activities of NE directional faults in the Capital area and surrounding areas change strongly,the amplitude of variation may be taken as an index for medium long-term earthquake prediction.
引文
1焦青,邱泽华,范国胜.北京地区八宝山、黄庄-高丽营断裂近期构造活动与地震分析[J].大地测量与地球动力学,2005,25(4):50~54.1 Jiao Qing,Qiu Zehua and Fan Guosheng.An analysis of re-cent activity and earthquakes on Babaoshan and Huang-zhuang-Gaoliying fault in Beijing area[J].Journal of Geod-esy and Geodynamics,2005,25(4):50-54.(in Chinese)
2刘善华.华北地区强震前断层形变异常与演化特征[J].大地测量与地球动力学,2003,23(2):15~22.2 Liu Shanhua.Fault deformation anomaly and its evolutionarycharacter before strong earthquakes in North China[J].Journal of Geodesy and Geodynamics,2003,23(2):15-22.(in Chinese)
3郭良迁,等.北京地区近十年应变场变化特征[J].大地测量与地球动力学,2006,26(3):46~52.3 Guo Liangqian,et al.Characteristics of strain field variationin Beijing area[J].Journal of Geodesy and Geodynamics,2006,26(3):46-52.(in Chinese)
4张跃刚,等.从GPS观测看华北地区的形变场演化[J].大地测量与地球动力学,2006,26(1):36~41.4 Zhang Yuegang,et al.Study on evolution of deformation fieldin North China area with GPS data[J].Journal of Geodesyand Geodynamics,2006,26(1):36-41.(in Chinese)
5焦青,等.文安5.1级地震前兆变化特征分析[J].大地测量与地球动力学,2007,27(6):96~99.5 Jiao Qing,et al.On precursor variation characteristics beforeWenanM5.1 earthquake[J].Journal of Geodesy and Geody-namics,2007,27(6):96-99.(in Chinese)
6曾秋生.中国地壳应力状态[M].北京:地震出版社,1990.6 Zeng Qiusheng.Crustal stress state of China[M].Beijing:Seismological Press,1990.(in Chinese)
7李钦祖.华北地壳应力场的基本特征[J].地球物理学报,1980,23(4):376~388.7 Li Qinzu.The basic characteristics of crustal stress field ofnorth China[J].Chinese J.Geophysics,1980,23(4):376-388.(in Chinese)
8刁桂苓,等.2006年7月4日文安5.1级地震[J].地震地质,2006,28(3):497~502.8 Diao Guiling,et al.WenanM5.1 earthquake of July 4,2006[J].Seismology and Geology,2006,28(3):497-502.(in Chinese)
9赵希俊,等.北京地区主要断层的最新活动特征[A].北京大学国际地质科学研讨会论文集[C].北京:地震出版社,1998.9 Zhao Xijun,et al.Characteristics of the most recent activi-ties of the major faults in Beijing area[A].Symposium ofinternational geological science of Peking university[C].Beijing:Seismological Press,1998.(in Chinese)
10张超.跨断层位移测量与局部断层活动[J].地震,1981,1(5):24~25.10 Zhang Chao.Cross-fault displacement measurement and lo-cal fault activity[J].Earthquake,1981,1(5):24-25.(in Chinese)
2刘善华.华北地区强震前断层形变异常与演化特征[J].大地测量与地球动力学,2003,23(2):15~22.2 Liu Shanhua.Fault deformation anomaly and its evolutionarycharacter before strong earthquakes in North China[J].Journal of Geodesy and Geodynamics,2003,23(2):15-22.(in Chinese)
3郭良迁,等.北京地区近十年应变场变化特征[J].大地测量与地球动力学,2006,26(3):46~52.3 Guo Liangqian,et al.Characteristics of strain field variationin Beijing area[J].Journal of Geodesy and Geodynamics,2006,26(3):46-52.(in Chinese)
4张跃刚,等.从GPS观测看华北地区的形变场演化[J].大地测量与地球动力学,2006,26(1):36~41.4 Zhang Yuegang,et al.Study on evolution of deformation fieldin North China area with GPS data[J].Journal of Geodesyand Geodynamics,2006,26(1):36-41.(in Chinese)
5焦青,等.文安5.1级地震前兆变化特征分析[J].大地测量与地球动力学,2007,27(6):96~99.5 Jiao Qing,et al.On precursor variation characteristics beforeWenanM5.1 earthquake[J].Journal of Geodesy and Geody-namics,2007,27(6):96-99.(in Chinese)
6曾秋生.中国地壳应力状态[M].北京:地震出版社,1990.6 Zeng Qiusheng.Crustal stress state of China[M].Beijing:Seismological Press,1990.(in Chinese)
7李钦祖.华北地壳应力场的基本特征[J].地球物理学报,1980,23(4):376~388.7 Li Qinzu.The basic characteristics of crustal stress field ofnorth China[J].Chinese J.Geophysics,1980,23(4):376-388.(in Chinese)
8刁桂苓,等.2006年7月4日文安5.1级地震[J].地震地质,2006,28(3):497~502.8 Diao Guiling,et al.WenanM5.1 earthquake of July 4,2006[J].Seismology and Geology,2006,28(3):497-502.(in Chinese)
9赵希俊,等.北京地区主要断层的最新活动特征[A].北京大学国际地质科学研讨会论文集[C].北京:地震出版社,1998.9 Zhao Xijun,et al.Characteristics of the most recent activi-ties of the major faults in Beijing area[A].Symposium ofinternational geological science of Peking university[C].Beijing:Seismological Press,1998.(in Chinese)
10张超.跨断层位移测量与局部断层活动[J].地震,1981,1(5):24~25.10 Zhang Chao.Cross-fault displacement measurement and lo-cal fault activity[J].Earthquake,1981,1(5):24-25.(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