富蕴地震台地倾斜震前异常特征分析
|
摘要
根据富蕴地震台地倾斜观测资料,对距该台360 km范围内地震震前异常进行了分析。结果表明:①一般情况下,异常的持续时间越长,资料的异常变化幅度越大,震级越大;②地倾斜观测资料的异常形态与震中位置有关,通常是单分量图和矢量图的拐弯处指向震中位置,震前震源区的应力集中往往造成矢量图畸变,单分量图形出现加速的异常特征;③阶跃是震前异常的一种重要表现。
According to the ground tilt data in Fuyun station,the earthquake precursory anomaly was analyzed about 360 km around the station.The result showed ① Under normal circumstances the longer the anomaly lasted,the larger the data changed,the greater the target magnitude will be;② the anomaly shape was related to the epicenter location,usually the turning corner of observation date pointed to the epicenter location and the stress concentration of focal area before the earthquake caused vectogram aberrance and single component accelerating change;③ Step is an important display of earthquake precursory anomaly.
According to the ground tilt data in Fuyun station,the earthquake precursory anomaly was analyzed about 360 km around the station.The result showed ① Under normal circumstances the longer the anomaly lasted,the larger the data changed,the greater the target magnitude will be;② the anomaly shape was related to the epicenter location,usually the turning corner of observation date pointed to the epicenter location and the stress concentration of focal area before the earthquake caused vectogram aberrance and single component accelerating change;③ Step is an important display of earthquake precursory anomaly.
引文
[1]丁国瑜.富蕴地震断裂带[M].北京:地震出版社,1985.
[2]郭恒祖,杨马陵.1987年9月19日富蕴北5.8级地震[J].内陆地震,1988,2(4):44-51.
[3]吴秀莲,韩月鹏.富蕴台地倾斜异常与斋桑泊7.3级地震[J].地震,1993,12(6):73-75.
[4]宋立军,王克元,曲延军,等.1996年3月13日阿勒泰6.1级地震[J].内陆地震,1997,11(1):50-56.
[5]冯锐.地倾斜与地震[M].北京:地震出版社,1978.
[6]李孟聪.地震倾斜短时变化特征与地震关系的研究[C]//国家地震局科技监测司.地震预报方法与实用化研究文集(形变、重力、应变专集).北京:地震出版社,1991.
[2]郭恒祖,杨马陵.1987年9月19日富蕴北5.8级地震[J].内陆地震,1988,2(4):44-51.
[3]吴秀莲,韩月鹏.富蕴台地倾斜异常与斋桑泊7.3级地震[J].地震,1993,12(6):73-75.
[4]宋立军,王克元,曲延军,等.1996年3月13日阿勒泰6.1级地震[J].内陆地震,1997,11(1):50-56.
[5]冯锐.地倾斜与地震[M].北京:地震出版社,1978.
[6]李孟聪.地震倾斜短时变化特征与地震关系的研究[C]//国家地震局科技监测司.地震预报方法与实用化研究文集(形变、重力、应变专集).北京:地震出版社,1991.
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