后土桥台数字化地磁前兆异常的研究
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摘要
利用后土桥台地磁数字化资料,分析了磁通门所观测的分钟值日变形态,计算了5日幅值比和日幅值比。结果显示,往往地震前5日幅值比会出现高值异常,同时日幅值比也会出现一簇异常,且有逐渐增高趋势。结果表明,利用地磁数字化的高频资料进行地震短临预测预报具有一定的意义。
The daily variation of digital geomagnetic data observed by Fluxmeter in Houtuqiao seismostation is analyzed,and its 5-day amplitude-ratio and daily-amplitude-ratio are calculated.The results show that 5-day-amplitude-ratio usually shows high value anomalies,and daily-amplitude-ratio also shows a cluster of anomalies with an increasing tendency.This feature is significant to the application of high frequency digital geomagnetic data and earthquake prediction.
引文
[1]解用明.张北6.2级地震前后地磁Z分量的日变化[J].华北地震科学,1998,16(3):62.
    [2]解用明.震前地磁幅值比异常研究[J].华北地震科学,2005,23(1):37~40.

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