长周期形变波特征分析
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摘要
利用一些大地震前观测到的短临和临震地震前兆异常资料,综述了多年来长周期形变波观测事实和研究状况。利用地震前后记录到的典型震例异常图像的特点、形态、量级,多层次分析了长周期形变波的异常持续时间,有效监测范围,主震震级范围,异常形态,周期及传播速度特性。结果表明:长周期形变波异常持续时间多为震前几个小时到6.5天,对应地震的震级大于6.0级以上,有效距离范围100～2 000 km。
Selecting a great deal data of short-impending and impending earthquake precursory,and citing the recordings of the observational long-period deformation wave,we overview the research on the long-period deformation wave.Then we analyze the feature,shape and amplitudes of the anomalous images of the deformation wave of some typical earthquakes recorded by tidal deformation instruments before and after the earthquake to study the features of the long-period wave—duration of anomaly,effective monitoring rang,main shock magnitude range,anomaly shapes,period and propagation velocity.The results show that the duration of deformation anomaly extends from several hours to 6.5 days.The magnitude of the predicted earthquake is greater than 6.0 and the effective distance range is from 100 km to 2 000 km.
Selecting a great deal data of short-impending and impending earthquake precursory,and citing the recordings of the observational long-period deformation wave,we overview the research on the long-period deformation wave.Then we analyze the feature,shape and amplitudes of the anomalous images of the deformation wave of some typical earthquakes recorded by tidal deformation instruments before and after the earthquake to study the features of the long-period wave—duration of anomaly,effective monitoring rang,main shock magnitude range,anomaly shapes,period and propagation velocity.The results show that the duration of deformation anomaly extends from several hours to 6.5 days.The magnitude of the predicted earthquake is greater than 6.0 and the effective distance range is from 100 km to 2 000 km.
引文
陈德福.2006.潮汐形变短临异常图像及其时空特征[J].华南地震,26(1):89-105.
陈双贵,闫万生,田文通.2006.兰州形变台概况及资料映震能力的探讨[J].防灾科技学院学报,8(3):73-78.
邓建元.1996.对大地震前存在的超长周期形变波的研究[J].江苏力学,(12):23-28.
冯德益,潘琴龙,郑斯华,等.1984.长周期形变波及其反应的短期和临震地震前兆[J].地震学报,6(1):41-57.
郭增建,秦保燕.1979.震源物理[M].北京:地震出版社.
韩元杰.1984.预滑与地震前兆—长周期波动研究[J].西北地震学报,6(1):17-24.
胡毅力,文丽敏,杨润海,等.2006.孕震过程中几个典型形变场的实验研究[J].地震研究,29(2):182-184.
王少江,殷志山.1989.长周期形变波与慢地震[J].地壳形变与地震,9(3):2-8.
吴迪,罗奇峰,罗永锋.2007.长周期地震波的研究进展[J].地震研究,30(3):298-299.
吴云,周硕愚,苏恺之,等.2005.地形变测量[M].北京:地震出版社:54-55,245-250.
尹亮,李兴坚,陈兰新,等.2002.昆仑山口西MS8.1地震前高台钻孔应变异常[J].大地测量与地球动力学,22(4):89-91.
Dieterich J H.1978.Preseismic slip in a large scale friction experiment,Proceedings of19th U S Roch Mechanice Symposium:110-117.
陈双贵,闫万生,田文通.2006.兰州形变台概况及资料映震能力的探讨[J].防灾科技学院学报,8(3):73-78.
邓建元.1996.对大地震前存在的超长周期形变波的研究[J].江苏力学,(12):23-28.
冯德益,潘琴龙,郑斯华,等.1984.长周期形变波及其反应的短期和临震地震前兆[J].地震学报,6(1):41-57.
郭增建,秦保燕.1979.震源物理[M].北京:地震出版社.
韩元杰.1984.预滑与地震前兆—长周期波动研究[J].西北地震学报,6(1):17-24.
胡毅力,文丽敏,杨润海,等.2006.孕震过程中几个典型形变场的实验研究[J].地震研究,29(2):182-184.
王少江,殷志山.1989.长周期形变波与慢地震[J].地壳形变与地震,9(3):2-8.
吴迪,罗奇峰,罗永锋.2007.长周期地震波的研究进展[J].地震研究,30(3):298-299.
吴云,周硕愚,苏恺之,等.2005.地形变测量[M].北京:地震出版社:54-55,245-250.
尹亮,李兴坚,陈兰新,等.2002.昆仑山口西MS8.1地震前高台钻孔应变异常[J].大地测量与地球动力学,22(4):89-91.
Dieterich J H.1978.Preseismic slip in a large scale friction experiment,Proceedings of19th U S Roch Mechanice Symposium:110-117.
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