台湾海峡地震定点形变的异常分析
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摘要
结合定点形变前兆异常的常用判定标准,用多种数学方法处理了厦门台与漳州台1991～1995年水平摆地倾斜资料,发现在9.16海峡地震之前,两个台站的资料都表现出不同程度的年变规律畸变、γ因子异常、一阶差分法异常、滤波法异常等多种地形变前兆指标异常。
On the basis of the common criteria of deformation anomaly,a variety of mathematical methods were used to analyze the data of horizontal pendulum tiltmeters at Xiamen and Zhangzhou seismostations in 1991 -1995. The results indicate that a variety of abnormal terrain precursor indicators of variable degrees existed in the two seismostation data before the 9.16 strait earthquake,namely:(1) the change of distortion; (2) γ factor anomaly; (3) the first-order finite difference method anomaly; (4) filtering method anomaly.
On the basis of the common criteria of deformation anomaly,a variety of mathematical methods were used to analyze the data of horizontal pendulum tiltmeters at Xiamen and Zhangzhou seismostations in 1991 -1995. The results indicate that a variety of abnormal terrain precursor indicators of variable degrees existed in the two seismostation data before the 9.16 strait earthquake,namely:(1) the change of distortion; (2) γ factor anomaly; (3) the first-order finite difference method anomaly; (4) filtering method anomaly.
引文
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[2]吴翼麟.倾斜固体潮振幅因子γ值动态变化的物理义[J].地壳形变与地震,1985,5(2):121-124.
[3]国家地震局科技监测司.地震地形变观测技术[M].北京:地震出版社,1995.364-371
[4]傅再扬,吴绍祖,郑永通,等.福建地区倾斜中短期地震前兆识别及映震效果初探[J].华南地震,2003,23(4):66-70.
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